Mercurial > public > ostc4
annotate Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_ll_spi.c @ 464:05c5c3d10902 Improve_Logtansfer
Added compile switch to handle additional data during raw header request:
Beeside the pure header also the number of the last dive is of interested. Added compile switch to stay compatible with tools which might use the raw header command
Added commands to support read and write acces to sample buffer
author | ideenmodellierer |
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date | Mon, 13 Apr 2020 16:00:54 +0200 |
parents | c78bcbd5deda |
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rev | line source |
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1 /** |
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2 ****************************************************************************** |
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3 * @file stm32f4xx_ll_spi.c |
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4 * @author MCD Application Team |
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5 * @brief SPI LL module driver. |
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6 ****************************************************************************** |
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7 * @attention |
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8 * |
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9 * <h2><center>© COPYRIGHT(c) 2017 STMicroelectronics</center></h2> |
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10 * |
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11 * Redistribution and use in source and binary forms, with or without modification, |
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12 * are permitted provided that the following conditions are met: |
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13 * 1. Redistributions of source code must retain the above copyright notice, |
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14 * this list of conditions and the following disclaimer. |
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15 * 2. Redistributions in binary form must reproduce the above copyright notice, |
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16 * this list of conditions and the following disclaimer in the documentation |
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17 * and/or other materials provided with the distribution. |
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18 * 3. Neither the name of STMicroelectronics nor the names of its contributors |
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19 * may be used to endorse or promote products derived from this software |
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20 * without specific prior written permission. |
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21 * |
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22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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25 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
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26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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32 * |
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33 ****************************************************************************** |
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34 */ |
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35 #if defined(USE_FULL_LL_DRIVER) |
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36 |
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37 /* Includes ------------------------------------------------------------------*/ |
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38 #include "stm32f4xx_ll_spi.h" |
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39 #include "stm32f4xx_ll_bus.h" |
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40 #include "stm32f4xx_ll_rcc.h" |
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41 |
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42 #ifdef USE_FULL_ASSERT |
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43 #include "stm32_assert.h" |
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44 #else |
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45 #define assert_param(expr) ((void)0U) |
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46 #endif |
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47 |
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48 /** @addtogroup STM32F4xx_LL_Driver |
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49 * @{ |
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50 */ |
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51 |
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52 #if defined (SPI1) || defined (SPI2) || defined (SPI3) || defined (SPI4) || defined (SPI5) || defined(SPI6) |
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53 |
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54 /** @addtogroup SPI_LL |
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55 * @{ |
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56 */ |
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57 |
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58 /* Private types -------------------------------------------------------------*/ |
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59 /* Private variables ---------------------------------------------------------*/ |
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60 |
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61 /* Private constants ---------------------------------------------------------*/ |
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62 /** @defgroup SPI_LL_Private_Constants SPI Private Constants |
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63 * @{ |
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64 */ |
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65 /* SPI registers Masks */ |
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66 #define SPI_CR1_CLEAR_MASK (SPI_CR1_CPHA | SPI_CR1_CPOL | SPI_CR1_MSTR | \ |
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67 SPI_CR1_BR | SPI_CR1_LSBFIRST | SPI_CR1_SSI | \ |
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68 SPI_CR1_SSM | SPI_CR1_RXONLY | SPI_CR1_DFF | \ |
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69 SPI_CR1_CRCNEXT | SPI_CR1_CRCEN | SPI_CR1_BIDIOE | \ |
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70 SPI_CR1_BIDIMODE) |
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71 /** |
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72 * @} |
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73 */ |
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74 |
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75 /* Private macros ------------------------------------------------------------*/ |
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76 /** @defgroup SPI_LL_Private_Macros SPI Private Macros |
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77 * @{ |
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78 */ |
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79 #define IS_LL_SPI_TRANSFER_DIRECTION(__VALUE__) (((__VALUE__) == LL_SPI_FULL_DUPLEX) \ |
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80 || ((__VALUE__) == LL_SPI_SIMPLEX_RX) \ |
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81 || ((__VALUE__) == LL_SPI_HALF_DUPLEX_RX) \ |
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82 || ((__VALUE__) == LL_SPI_HALF_DUPLEX_TX)) |
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83 |
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84 #define IS_LL_SPI_MODE(__VALUE__) (((__VALUE__) == LL_SPI_MODE_MASTER) \ |
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85 || ((__VALUE__) == LL_SPI_MODE_SLAVE)) |
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86 |
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87 #define IS_LL_SPI_DATAWIDTH(__VALUE__) (((__VALUE__) == LL_SPI_DATAWIDTH_8BIT) \ |
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88 || ((__VALUE__) == LL_SPI_DATAWIDTH_16BIT)) |
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89 |
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90 #define IS_LL_SPI_POLARITY(__VALUE__) (((__VALUE__) == LL_SPI_POLARITY_LOW) \ |
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91 || ((__VALUE__) == LL_SPI_POLARITY_HIGH)) |
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92 |
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93 #define IS_LL_SPI_PHASE(__VALUE__) (((__VALUE__) == LL_SPI_PHASE_1EDGE) \ |
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94 || ((__VALUE__) == LL_SPI_PHASE_2EDGE)) |
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95 |
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96 #define IS_LL_SPI_NSS(__VALUE__) (((__VALUE__) == LL_SPI_NSS_SOFT) \ |
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97 || ((__VALUE__) == LL_SPI_NSS_HARD_INPUT) \ |
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98 || ((__VALUE__) == LL_SPI_NSS_HARD_OUTPUT)) |
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99 |
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100 #define IS_LL_SPI_BAUDRATE(__VALUE__) (((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV2) \ |
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101 || ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV4) \ |
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102 || ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV8) \ |
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103 || ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV16) \ |
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104 || ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV32) \ |
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105 || ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV64) \ |
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106 || ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV128) \ |
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107 || ((__VALUE__) == LL_SPI_BAUDRATEPRESCALER_DIV256)) |
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108 |
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109 #define IS_LL_SPI_BITORDER(__VALUE__) (((__VALUE__) == LL_SPI_LSB_FIRST) \ |
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110 || ((__VALUE__) == LL_SPI_MSB_FIRST)) |
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111 |
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112 #define IS_LL_SPI_CRCCALCULATION(__VALUE__) (((__VALUE__) == LL_SPI_CRCCALCULATION_ENABLE) \ |
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113 || ((__VALUE__) == LL_SPI_CRCCALCULATION_DISABLE)) |
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114 |
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115 #define IS_LL_SPI_CRC_POLYNOMIAL(__VALUE__) ((__VALUE__) >= 0x1U) |
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116 |
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117 /** |
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118 * @} |
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119 */ |
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120 |
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121 /* Private function prototypes -----------------------------------------------*/ |
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122 |
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123 /* Exported functions --------------------------------------------------------*/ |
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124 /** @addtogroup SPI_LL_Exported_Functions |
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125 * @{ |
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126 */ |
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127 |
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128 /** @addtogroup SPI_LL_EF_Init |
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129 * @{ |
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130 */ |
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131 |
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132 /** |
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133 * @brief De-initialize the SPI registers to their default reset values. |
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134 * @param SPIx SPI Instance |
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135 * @retval An ErrorStatus enumeration value: |
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136 * - SUCCESS: SPI registers are de-initialized |
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137 * - ERROR: SPI registers are not de-initialized |
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138 */ |
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139 ErrorStatus LL_SPI_DeInit(SPI_TypeDef *SPIx) |
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140 { |
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141 ErrorStatus status = ERROR; |
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142 |
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143 /* Check the parameters */ |
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144 assert_param(IS_SPI_ALL_INSTANCE(SPIx)); |
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145 |
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146 #if defined(SPI1) |
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147 if (SPIx == SPI1) |
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148 { |
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149 /* Force reset of SPI clock */ |
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150 LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_SPI1); |
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151 |
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152 /* Release reset of SPI clock */ |
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153 LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_SPI1); |
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154 |
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155 status = SUCCESS; |
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156 } |
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157 #endif /* SPI1 */ |
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158 #if defined(SPI2) |
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159 if (SPIx == SPI2) |
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160 { |
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161 /* Force reset of SPI clock */ |
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162 LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_SPI2); |
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163 |
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164 /* Release reset of SPI clock */ |
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165 LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_SPI2); |
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166 |
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167 status = SUCCESS; |
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168 } |
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169 #endif /* SPI2 */ |
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170 #if defined(SPI3) |
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171 if (SPIx == SPI3) |
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172 { |
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173 /* Force reset of SPI clock */ |
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174 LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_SPI3); |
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175 |
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176 /* Release reset of SPI clock */ |
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177 LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_SPI3); |
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178 |
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179 status = SUCCESS; |
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180 } |
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181 #endif /* SPI3 */ |
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182 #if defined(SPI4) |
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183 if (SPIx == SPI4) |
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184 { |
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185 /* Force reset of SPI clock */ |
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186 LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_SPI4); |
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187 |
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188 /* Release reset of SPI clock */ |
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189 LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_SPI4); |
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190 |
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191 status = SUCCESS; |
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192 } |
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193 #endif /* SPI4 */ |
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194 #if defined(SPI5) |
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195 if (SPIx == SPI5) |
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196 { |
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197 /* Force reset of SPI clock */ |
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198 LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_SPI5); |
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199 |
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200 /* Release reset of SPI clock */ |
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201 LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_SPI5); |
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202 |
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203 status = SUCCESS; |
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204 } |
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205 #endif /* SPI5 */ |
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206 #if defined(SPI6) |
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207 if (SPIx == SPI6) |
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208 { |
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209 /* Force reset of SPI clock */ |
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210 LL_APB2_GRP1_ForceReset(LL_APB2_GRP1_PERIPH_SPI6); |
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211 |
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212 /* Release reset of SPI clock */ |
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213 LL_APB2_GRP1_ReleaseReset(LL_APB2_GRP1_PERIPH_SPI6); |
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214 |
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215 status = SUCCESS; |
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216 } |
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217 #endif /* SPI6 */ |
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218 |
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219 return status; |
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220 } |
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221 |
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222 /** |
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223 * @brief Initialize the SPI registers according to the specified parameters in SPI_InitStruct. |
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224 * @note As some bits in SPI configuration registers can only be written when the SPI is disabled (SPI_CR1_SPE bit =0), |
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225 * SPI IP should be in disabled state prior calling this function. Otherwise, ERROR result will be returned. |
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226 * @param SPIx SPI Instance |
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227 * @param SPI_InitStruct pointer to a @ref LL_SPI_InitTypeDef structure |
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228 * @retval An ErrorStatus enumeration value. (Return always SUCCESS) |
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229 */ |
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230 ErrorStatus LL_SPI_Init(SPI_TypeDef *SPIx, LL_SPI_InitTypeDef *SPI_InitStruct) |
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231 { |
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232 ErrorStatus status = ERROR; |
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233 |
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234 /* Check the SPI Instance SPIx*/ |
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235 assert_param(IS_SPI_ALL_INSTANCE(SPIx)); |
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236 |
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237 /* Check the SPI parameters from SPI_InitStruct*/ |
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238 assert_param(IS_LL_SPI_TRANSFER_DIRECTION(SPI_InitStruct->TransferDirection)); |
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239 assert_param(IS_LL_SPI_MODE(SPI_InitStruct->Mode)); |
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240 assert_param(IS_LL_SPI_DATAWIDTH(SPI_InitStruct->DataWidth)); |
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241 assert_param(IS_LL_SPI_POLARITY(SPI_InitStruct->ClockPolarity)); |
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242 assert_param(IS_LL_SPI_PHASE(SPI_InitStruct->ClockPhase)); |
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243 assert_param(IS_LL_SPI_NSS(SPI_InitStruct->NSS)); |
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244 assert_param(IS_LL_SPI_BAUDRATE(SPI_InitStruct->BaudRate)); |
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245 assert_param(IS_LL_SPI_BITORDER(SPI_InitStruct->BitOrder)); |
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246 assert_param(IS_LL_SPI_CRCCALCULATION(SPI_InitStruct->CRCCalculation)); |
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247 |
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248 if (LL_SPI_IsEnabled(SPIx) == 0x00000000U) |
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249 { |
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250 /*---------------------------- SPIx CR1 Configuration ------------------------ |
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251 * Configure SPIx CR1 with parameters: |
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252 * - TransferDirection: SPI_CR1_BIDIMODE, SPI_CR1_BIDIOE and SPI_CR1_RXONLY bits |
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253 * - Master/Slave Mode: SPI_CR1_MSTR bit |
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254 * - DataWidth: SPI_CR1_DFF bit |
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255 * - ClockPolarity: SPI_CR1_CPOL bit |
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256 * - ClockPhase: SPI_CR1_CPHA bit |
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257 * - NSS management: SPI_CR1_SSM bit |
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258 * - BaudRate prescaler: SPI_CR1_BR[2:0] bits |
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259 * - BitOrder: SPI_CR1_LSBFIRST bit |
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260 * - CRCCalculation: SPI_CR1_CRCEN bit |
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261 */ |
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262 MODIFY_REG(SPIx->CR1, |
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263 SPI_CR1_CLEAR_MASK, |
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264 SPI_InitStruct->TransferDirection | SPI_InitStruct->Mode | SPI_InitStruct->DataWidth | |
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265 SPI_InitStruct->ClockPolarity | SPI_InitStruct->ClockPhase | |
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266 SPI_InitStruct->NSS | SPI_InitStruct->BaudRate | |
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267 SPI_InitStruct->BitOrder | SPI_InitStruct->CRCCalculation); |
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268 |
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269 /*---------------------------- SPIx CR2 Configuration ------------------------ |
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270 * Configure SPIx CR2 with parameters: |
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271 * - NSS management: SSOE bit |
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272 */ |
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273 MODIFY_REG(SPIx->CR2, SPI_CR2_SSOE, (SPI_InitStruct->NSS >> 16U)); |
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274 |
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275 /*---------------------------- SPIx CRCPR Configuration ---------------------- |
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276 * Configure SPIx CRCPR with parameters: |
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277 * - CRCPoly: CRCPOLY[15:0] bits |
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278 */ |
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279 if (SPI_InitStruct->CRCCalculation == LL_SPI_CRCCALCULATION_ENABLE) |
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280 { |
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281 assert_param(IS_LL_SPI_CRC_POLYNOMIAL(SPI_InitStruct->CRCPoly)); |
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282 LL_SPI_SetCRCPolynomial(SPIx, SPI_InitStruct->CRCPoly); |
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283 } |
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284 status = SUCCESS; |
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285 } |
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286 |
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287 /* Activate the SPI mode (Reset I2SMOD bit in I2SCFGR register) */ |
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288 CLEAR_BIT(SPIx->I2SCFGR, SPI_I2SCFGR_I2SMOD); |
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289 return status; |
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290 } |
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291 |
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292 /** |
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293 * @brief Set each @ref LL_SPI_InitTypeDef field to default value. |
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294 * @param SPI_InitStruct pointer to a @ref LL_SPI_InitTypeDef structure |
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295 * whose fields will be set to default values. |
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296 * @retval None |
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297 */ |
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298 void LL_SPI_StructInit(LL_SPI_InitTypeDef *SPI_InitStruct) |
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299 { |
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300 /* Set SPI_InitStruct fields to default values */ |
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301 SPI_InitStruct->TransferDirection = LL_SPI_FULL_DUPLEX; |
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302 SPI_InitStruct->Mode = LL_SPI_MODE_SLAVE; |
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303 SPI_InitStruct->DataWidth = LL_SPI_DATAWIDTH_8BIT; |
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304 SPI_InitStruct->ClockPolarity = LL_SPI_POLARITY_LOW; |
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305 SPI_InitStruct->ClockPhase = LL_SPI_PHASE_1EDGE; |
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306 SPI_InitStruct->NSS = LL_SPI_NSS_HARD_INPUT; |
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307 SPI_InitStruct->BaudRate = LL_SPI_BAUDRATEPRESCALER_DIV2; |
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308 SPI_InitStruct->BitOrder = LL_SPI_MSB_FIRST; |
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309 SPI_InitStruct->CRCCalculation = LL_SPI_CRCCALCULATION_DISABLE; |
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310 SPI_InitStruct->CRCPoly = 7U; |
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311 } |
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312 |
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313 /** |
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314 * @} |
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315 */ |
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316 |
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317 /** |
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318 * @} |
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319 */ |
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320 |
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321 /** |
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322 * @} |
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323 */ |
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324 |
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325 /** @addtogroup I2S_LL |
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326 * @{ |
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327 */ |
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328 |
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329 /* Private types -------------------------------------------------------------*/ |
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330 /* Private variables ---------------------------------------------------------*/ |
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331 /* Private constants ---------------------------------------------------------*/ |
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332 /** @defgroup I2S_LL_Private_Constants I2S Private Constants |
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333 * @{ |
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334 */ |
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335 /* I2S registers Masks */ |
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336 #define I2S_I2SCFGR_CLEAR_MASK (SPI_I2SCFGR_CHLEN | SPI_I2SCFGR_DATLEN | \ |
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337 SPI_I2SCFGR_CKPOL | SPI_I2SCFGR_I2SSTD | \ |
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338 SPI_I2SCFGR_I2SCFG | SPI_I2SCFGR_I2SMOD ) |
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339 |
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340 #define I2S_I2SPR_CLEAR_MASK 0x0002U |
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341 /** |
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342 * @} |
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343 */ |
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344 /* Private macros ------------------------------------------------------------*/ |
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345 /** @defgroup I2S_LL_Private_Macros I2S Private Macros |
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346 * @{ |
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347 */ |
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348 |
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349 #define IS_LL_I2S_DATAFORMAT(__VALUE__) (((__VALUE__) == LL_I2S_DATAFORMAT_16B) \ |
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350 || ((__VALUE__) == LL_I2S_DATAFORMAT_16B_EXTENDED) \ |
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351 || ((__VALUE__) == LL_I2S_DATAFORMAT_24B) \ |
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352 || ((__VALUE__) == LL_I2S_DATAFORMAT_32B)) |
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353 |
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354 #define IS_LL_I2S_CPOL(__VALUE__) (((__VALUE__) == LL_I2S_POLARITY_LOW) \ |
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355 || ((__VALUE__) == LL_I2S_POLARITY_HIGH)) |
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356 |
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357 #define IS_LL_I2S_STANDARD(__VALUE__) (((__VALUE__) == LL_I2S_STANDARD_PHILIPS) \ |
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358 || ((__VALUE__) == LL_I2S_STANDARD_MSB) \ |
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359 || ((__VALUE__) == LL_I2S_STANDARD_LSB) \ |
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360 || ((__VALUE__) == LL_I2S_STANDARD_PCM_SHORT) \ |
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361 || ((__VALUE__) == LL_I2S_STANDARD_PCM_LONG)) |
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362 |
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363 #define IS_LL_I2S_MODE(__VALUE__) (((__VALUE__) == LL_I2S_MODE_SLAVE_TX) \ |
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364 || ((__VALUE__) == LL_I2S_MODE_SLAVE_RX) \ |
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365 || ((__VALUE__) == LL_I2S_MODE_MASTER_TX) \ |
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366 || ((__VALUE__) == LL_I2S_MODE_MASTER_RX)) |
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367 |
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368 #define IS_LL_I2S_MCLK_OUTPUT(__VALUE__) (((__VALUE__) == LL_I2S_MCLK_OUTPUT_ENABLE) \ |
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369 || ((__VALUE__) == LL_I2S_MCLK_OUTPUT_DISABLE)) |
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370 |
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371 #define IS_LL_I2S_AUDIO_FREQ(__VALUE__) ((((__VALUE__) >= LL_I2S_AUDIOFREQ_8K) \ |
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372 && ((__VALUE__) <= LL_I2S_AUDIOFREQ_192K)) \ |
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373 || ((__VALUE__) == LL_I2S_AUDIOFREQ_DEFAULT)) |
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374 |
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375 #define IS_LL_I2S_PRESCALER_LINEAR(__VALUE__) ((__VALUE__) >= 0x2U) |
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376 |
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377 #define IS_LL_I2S_PRESCALER_PARITY(__VALUE__) (((__VALUE__) == LL_I2S_PRESCALER_PARITY_EVEN) \ |
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378 || ((__VALUE__) == LL_I2S_PRESCALER_PARITY_ODD)) |
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379 /** |
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380 * @} |
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381 */ |
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382 |
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383 /* Private function prototypes -----------------------------------------------*/ |
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384 |
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385 /* Exported functions --------------------------------------------------------*/ |
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386 /** @addtogroup I2S_LL_Exported_Functions |
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387 * @{ |
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388 */ |
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389 |
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390 /** @addtogroup I2S_LL_EF_Init |
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391 * @{ |
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392 */ |
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393 |
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394 /** |
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395 * @brief De-initialize the SPI/I2S registers to their default reset values. |
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396 * @param SPIx SPI Instance |
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397 * @retval An ErrorStatus enumeration value: |
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398 * - SUCCESS: SPI registers are de-initialized |
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399 * - ERROR: SPI registers are not de-initialized |
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400 */ |
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401 ErrorStatus LL_I2S_DeInit(SPI_TypeDef *SPIx) |
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402 { |
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403 return LL_SPI_DeInit(SPIx); |
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404 } |
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405 |
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406 /** |
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407 * @brief Initializes the SPI/I2S registers according to the specified parameters in I2S_InitStruct. |
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408 * @note As some bits in SPI configuration registers can only be written when the SPI is disabled (SPI_CR1_SPE bit =0), |
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409 * SPI IP should be in disabled state prior calling this function. Otherwise, ERROR result will be returned. |
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410 * @param SPIx SPI Instance |
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411 * @param I2S_InitStruct pointer to a @ref LL_I2S_InitTypeDef structure |
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412 * @retval An ErrorStatus enumeration value: |
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413 * - SUCCESS: SPI registers are Initialized |
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414 * - ERROR: SPI registers are not Initialized |
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415 */ |
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416 ErrorStatus LL_I2S_Init(SPI_TypeDef *SPIx, LL_I2S_InitTypeDef *I2S_InitStruct) |
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417 { |
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418 uint16_t i2sdiv = 2U, i2sodd = 0U, packetlength = 1U; |
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419 uint32_t tmp = 0U; |
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420 uint32_t sourceclock = 0U; |
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421 ErrorStatus status = ERROR; |
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422 |
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423 /* Check the I2S parameters */ |
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424 assert_param(IS_I2S_ALL_INSTANCE(SPIx)); |
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425 assert_param(IS_LL_I2S_MODE(I2S_InitStruct->Mode)); |
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426 assert_param(IS_LL_I2S_STANDARD(I2S_InitStruct->Standard)); |
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427 assert_param(IS_LL_I2S_DATAFORMAT(I2S_InitStruct->DataFormat)); |
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428 assert_param(IS_LL_I2S_MCLK_OUTPUT(I2S_InitStruct->MCLKOutput)); |
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429 assert_param(IS_LL_I2S_AUDIO_FREQ(I2S_InitStruct->AudioFreq)); |
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430 assert_param(IS_LL_I2S_CPOL(I2S_InitStruct->ClockPolarity)); |
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431 |
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432 if (LL_I2S_IsEnabled(SPIx) == 0x00000000U) |
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433 { |
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434 /*---------------------------- SPIx I2SCFGR Configuration -------------------- |
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435 * Configure SPIx I2SCFGR with parameters: |
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436 * - Mode: SPI_I2SCFGR_I2SCFG[1:0] bit |
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437 * - Standard: SPI_I2SCFGR_I2SSTD[1:0] and SPI_I2SCFGR_PCMSYNC bits |
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438 * - DataFormat: SPI_I2SCFGR_CHLEN and SPI_I2SCFGR_DATLEN bits |
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439 * - ClockPolarity: SPI_I2SCFGR_CKPOL bit |
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440 */ |
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441 |
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442 /* Write to SPIx I2SCFGR */ |
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443 MODIFY_REG(SPIx->I2SCFGR, |
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444 I2S_I2SCFGR_CLEAR_MASK, |
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445 I2S_InitStruct->Mode | I2S_InitStruct->Standard | |
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446 I2S_InitStruct->DataFormat | I2S_InitStruct->ClockPolarity | |
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447 SPI_I2SCFGR_I2SMOD); |
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448 |
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449 /*---------------------------- SPIx I2SPR Configuration ---------------------- |
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450 * Configure SPIx I2SPR with parameters: |
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451 * - MCLKOutput: SPI_I2SPR_MCKOE bit |
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452 * - AudioFreq: SPI_I2SPR_I2SDIV[7:0] and SPI_I2SPR_ODD bits |
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453 */ |
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454 |
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455 /* If the requested audio frequency is not the default, compute the prescaler (i2sodd, i2sdiv) |
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456 * else, default values are used: i2sodd = 0U, i2sdiv = 2U. |
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457 */ |
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458 if (I2S_InitStruct->AudioFreq != LL_I2S_AUDIOFREQ_DEFAULT) |
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459 { |
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460 /* Check the frame length (For the Prescaler computing) |
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461 * Default value: LL_I2S_DATAFORMAT_16B (packetlength = 1U). |
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462 */ |
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463 if (I2S_InitStruct->DataFormat != LL_I2S_DATAFORMAT_16B) |
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464 { |
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465 /* Packet length is 32 bits */ |
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466 packetlength = 2U; |
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467 } |
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468 |
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469 /* If an external I2S clock has to be used, the specific define should be set |
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470 in the project configuration or in the stm32f4xx_ll_rcc.h file */ |
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471 /* Get the I2S source clock value */ |
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472 sourceclock = LL_RCC_GetI2SClockFreq(LL_RCC_I2S1_CLKSOURCE); |
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473 |
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474 /* Compute the Real divider depending on the MCLK output state with a floating point */ |
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475 if (I2S_InitStruct->MCLKOutput == LL_I2S_MCLK_OUTPUT_ENABLE) |
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476 { |
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477 /* MCLK output is enabled */ |
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478 tmp = (uint16_t)(((((sourceclock / 256U) * 10U) / I2S_InitStruct->AudioFreq)) + 5U); |
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479 } |
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480 else |
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481 { |
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482 /* MCLK output is disabled */ |
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483 tmp = (uint16_t)(((((sourceclock / (32U * packetlength)) * 10U) / I2S_InitStruct->AudioFreq)) + 5U); |
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484 } |
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485 |
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486 /* Remove the floating point */ |
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487 tmp = tmp / 10U; |
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488 |
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489 /* Check the parity of the divider */ |
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490 i2sodd = (uint16_t)(tmp & (uint16_t)0x0001U); |
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491 |
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492 /* Compute the i2sdiv prescaler */ |
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493 i2sdiv = (uint16_t)((tmp - i2sodd) / 2U); |
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494 |
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495 /* Get the Mask for the Odd bit (SPI_I2SPR[8]) register */ |
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496 i2sodd = (uint16_t)(i2sodd << 8U); |
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497 } |
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498 |
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499 /* Test if the divider is 1 or 0 or greater than 0xFF */ |
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500 if ((i2sdiv < 2U) || (i2sdiv > 0xFFU)) |
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501 { |
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502 /* Set the default values */ |
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503 i2sdiv = 2U; |
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504 i2sodd = 0U; |
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505 } |
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506 |
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507 /* Write to SPIx I2SPR register the computed value */ |
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508 WRITE_REG(SPIx->I2SPR, i2sdiv | i2sodd | I2S_InitStruct->MCLKOutput); |
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509 |
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510 status = SUCCESS; |
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511 } |
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512 return status; |
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513 } |
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514 |
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515 /** |
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516 * @brief Set each @ref LL_I2S_InitTypeDef field to default value. |
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517 * @param I2S_InitStruct pointer to a @ref LL_I2S_InitTypeDef structure |
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518 * whose fields will be set to default values. |
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519 * @retval None |
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520 */ |
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521 void LL_I2S_StructInit(LL_I2S_InitTypeDef *I2S_InitStruct) |
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522 { |
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523 /*--------------- Reset I2S init structure parameters values -----------------*/ |
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524 I2S_InitStruct->Mode = LL_I2S_MODE_SLAVE_TX; |
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525 I2S_InitStruct->Standard = LL_I2S_STANDARD_PHILIPS; |
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526 I2S_InitStruct->DataFormat = LL_I2S_DATAFORMAT_16B; |
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527 I2S_InitStruct->MCLKOutput = LL_I2S_MCLK_OUTPUT_DISABLE; |
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528 I2S_InitStruct->AudioFreq = LL_I2S_AUDIOFREQ_DEFAULT; |
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529 I2S_InitStruct->ClockPolarity = LL_I2S_POLARITY_LOW; |
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530 } |
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531 |
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532 /** |
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533 * @brief Set linear and parity prescaler. |
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534 * @note To calculate value of PrescalerLinear(I2SDIV[7:0] bits) and PrescalerParity(ODD bit)\n |
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535 * Check Audio frequency table and formulas inside Reference Manual (SPI/I2S). |
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536 * @param SPIx SPI Instance |
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537 * @param PrescalerLinear value Min_Data=0x02 and Max_Data=0xFF. |
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538 * @param PrescalerParity This parameter can be one of the following values: |
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539 * @arg @ref LL_I2S_PRESCALER_PARITY_EVEN |
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540 * @arg @ref LL_I2S_PRESCALER_PARITY_ODD |
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541 * @retval None |
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542 */ |
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543 void LL_I2S_ConfigPrescaler(SPI_TypeDef *SPIx, uint32_t PrescalerLinear, uint32_t PrescalerParity) |
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544 { |
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545 /* Check the I2S parameters */ |
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546 assert_param(IS_I2S_ALL_INSTANCE(SPIx)); |
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547 assert_param(IS_LL_I2S_PRESCALER_LINEAR(PrescalerLinear)); |
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548 assert_param(IS_LL_I2S_PRESCALER_PARITY(PrescalerParity)); |
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549 |
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550 /* Write to SPIx I2SPR */ |
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551 MODIFY_REG(SPIx->I2SPR, SPI_I2SPR_I2SDIV | SPI_I2SPR_ODD, PrescalerLinear | (PrescalerParity << 8U)); |
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552 } |
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553 |
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554 #if defined (SPI_I2S_FULLDUPLEX_SUPPORT) |
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555 /** |
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556 * @brief Configures the full duplex mode for the I2Sx peripheral using its extension |
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557 * I2Sxext according to the specified parameters in the I2S_InitStruct. |
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558 * @note The structure pointed by I2S_InitStruct parameter should be the same |
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559 * used for the master I2S peripheral. In this case, if the master is |
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560 * configured as transmitter, the slave will be receiver and vice versa. |
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561 * Or you can force a different mode by modifying the field I2S_Mode to the |
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562 * value I2S_SlaveRx or I2S_SlaveTx independently of the master configuration. |
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563 * @param I2Sxext SPI Instance |
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564 * @param I2S_InitStruct pointer to a @ref LL_I2S_InitTypeDef structure |
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565 * @retval An ErrorStatus enumeration value: |
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566 * - SUCCESS: I2Sxext registers are Initialized |
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567 * - ERROR: I2Sxext registers are not Initialized |
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568 */ |
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569 ErrorStatus LL_I2S_InitFullDuplex(SPI_TypeDef *I2Sxext, LL_I2S_InitTypeDef *I2S_InitStruct) |
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570 { |
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571 uint16_t mode = 0U; |
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572 ErrorStatus status = ERROR; |
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573 |
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574 /* Check the I2S parameters */ |
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575 assert_param(IS_I2S_EXT_ALL_INSTANCE(I2Sxext)); |
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576 assert_param(IS_LL_I2S_MODE(I2S_InitStruct->Mode)); |
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577 assert_param(IS_LL_I2S_STANDARD(I2S_InitStruct->Standard)); |
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578 assert_param(IS_LL_I2S_DATAFORMAT(I2S_InitStruct->DataFormat)); |
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579 assert_param(IS_LL_I2S_CPOL(I2S_InitStruct->ClockPolarity)); |
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580 |
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581 if (LL_I2S_IsEnabled(I2Sxext) == 0x00000000U) |
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582 { |
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583 /*---------------------------- SPIx I2SCFGR Configuration -------------------- |
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584 * Configure SPIx I2SCFGR with parameters: |
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585 * - Mode: SPI_I2SCFGR_I2SCFG[1:0] bit |
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586 * - Standard: SPI_I2SCFGR_I2SSTD[1:0] and SPI_I2SCFGR_PCMSYNC bits |
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587 * - DataFormat: SPI_I2SCFGR_CHLEN and SPI_I2SCFGR_DATLEN bits |
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588 * - ClockPolarity: SPI_I2SCFGR_CKPOL bit |
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589 */ |
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590 |
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591 /* Reset I2SPR registers */ |
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592 WRITE_REG(I2Sxext->I2SPR, I2S_I2SPR_CLEAR_MASK); |
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593 |
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594 /* Get the mode to be configured for the extended I2S */ |
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595 if ((I2S_InitStruct->Mode == LL_I2S_MODE_MASTER_TX) || (I2S_InitStruct->Mode == LL_I2S_MODE_SLAVE_TX)) |
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596 { |
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597 mode = LL_I2S_MODE_SLAVE_RX; |
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598 } |
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599 else |
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600 { |
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601 if ((I2S_InitStruct->Mode == LL_I2S_MODE_MASTER_RX) || (I2S_InitStruct->Mode == LL_I2S_MODE_SLAVE_RX)) |
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602 { |
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603 mode = LL_I2S_MODE_SLAVE_TX; |
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604 } |
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605 } |
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606 |
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607 /* Write to SPIx I2SCFGR */ |
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608 MODIFY_REG(I2Sxext->I2SCFGR, |
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609 I2S_I2SCFGR_CLEAR_MASK, |
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610 I2S_InitStruct->Standard | |
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611 I2S_InitStruct->DataFormat | I2S_InitStruct->ClockPolarity | |
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612 SPI_I2SCFGR_I2SMOD | mode); |
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613 |
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614 status = SUCCESS; |
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615 } |
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616 return status; |
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617 } |
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618 #endif /* SPI_I2S_FULLDUPLEX_SUPPORT */ |
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619 |
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620 /** |
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621 * @} |
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622 */ |
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623 |
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624 /** |
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625 * @} |
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626 */ |
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627 |
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628 /** |
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629 * @} |
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630 */ |
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631 |
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632 #endif /* defined (SPI1) || defined (SPI2) || defined (SPI3) || defined (SPI4) || defined (SPI5) || defined(SPI6) */ |
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633 |
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634 /** |
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635 * @} |
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636 */ |
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637 |
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638 #endif /* USE_FULL_LL_DRIVER */ |
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639 |
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640 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |