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annotate Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_ll_i2c.c @ 822:dff26bf4b542

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author heinrichsweikamp
date Mon, 09 Oct 2023 11:23:27 +0200
parents c78bcbd5deda
children
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128
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1 /**
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2 ******************************************************************************
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3 * @file stm32f4xx_ll_i2c.c
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4 * @author MCD Application Team
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5 * @brief I2C 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>&copy; 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_i2c.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 #ifdef USE_FULL_ASSERT
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42 #include "stm32_assert.h"
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43 #else
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44 #define assert_param(expr) ((void)0U)
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45 #endif
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46
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47 /** @addtogroup STM32F4xx_LL_Driver
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48 * @{
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49 */
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50
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51 #if defined (I2C1) || defined (I2C2) || defined (I2C3)
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52
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53 /** @defgroup I2C_LL I2C
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54 * @{
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55 */
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56
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57 /* Private types -------------------------------------------------------------*/
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58 /* Private variables ---------------------------------------------------------*/
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59 /* Private constants ---------------------------------------------------------*/
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60 /* Private macros ------------------------------------------------------------*/
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61 /** @addtogroup I2C_LL_Private_Macros
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62 * @{
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63 */
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64
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65 #define IS_LL_I2C_PERIPHERAL_MODE(__VALUE__) (((__VALUE__) == LL_I2C_MODE_I2C) || \
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66 ((__VALUE__) == LL_I2C_MODE_SMBUS_HOST) || \
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67 ((__VALUE__) == LL_I2C_MODE_SMBUS_DEVICE) || \
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68 ((__VALUE__) == LL_I2C_MODE_SMBUS_DEVICE_ARP))
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69
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70 #define IS_LL_I2C_CLOCK_SPEED(__VALUE__) (((__VALUE__) > 0U) && ((__VALUE__) <= LL_I2C_MAX_SPEED_FAST))
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71
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72 #define IS_LL_I2C_DUTY_CYCLE(__VALUE__) (((__VALUE__) == LL_I2C_DUTYCYCLE_2) || \
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73 ((__VALUE__) == LL_I2C_DUTYCYCLE_16_9))
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74
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75 #if defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF)
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76 #define IS_LL_I2C_ANALOG_FILTER(__VALUE__) (((__VALUE__) == LL_I2C_ANALOGFILTER_ENABLE) || \
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77 ((__VALUE__) == LL_I2C_ANALOGFILTER_DISABLE))
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78
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79 #define IS_LL_I2C_DIGITAL_FILTER(__VALUE__) ((__VALUE__) <= 0x0000000FU)
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80
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81 #endif
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82 #define IS_LL_I2C_OWN_ADDRESS1(__VALUE__) ((__VALUE__) <= 0x000003FFU)
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83
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84 #define IS_LL_I2C_TYPE_ACKNOWLEDGE(__VALUE__) (((__VALUE__) == LL_I2C_ACK) || \
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85 ((__VALUE__) == LL_I2C_NACK))
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86
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87 #define IS_LL_I2C_OWN_ADDRSIZE(__VALUE__) (((__VALUE__) == LL_I2C_OWNADDRESS1_7BIT) || \
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88 ((__VALUE__) == LL_I2C_OWNADDRESS1_10BIT))
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89 /**
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90 * @}
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91 */
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92
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93 /* Private function prototypes -----------------------------------------------*/
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94
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95 /* Exported functions --------------------------------------------------------*/
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96 /** @addtogroup I2C_LL_Exported_Functions
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97 * @{
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98 */
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99
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100 /** @addtogroup I2C_LL_EF_Init
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101 * @{
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102 */
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103
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104 /**
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105 * @brief De-initialize the I2C registers to their default reset values.
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106 * @param I2Cx I2C Instance.
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107 * @retval An ErrorStatus enumeration value:
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108 * - SUCCESS: I2C registers are de-initialized
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109 * - ERROR: I2C registers are not de-initialized
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110 */
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111 uint32_t LL_I2C_DeInit(I2C_TypeDef *I2Cx)
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112 {
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113 ErrorStatus status = SUCCESS;
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114
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115 /* Check the I2C Instance I2Cx */
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116 assert_param(IS_I2C_ALL_INSTANCE(I2Cx));
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117
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118 if (I2Cx == I2C1)
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119 {
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120 /* Force reset of I2C clock */
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121 LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C1);
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122
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123 /* Release reset of I2C clock */
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124 LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C1);
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125 }
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126 else if (I2Cx == I2C2)
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127 {
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128 /* Force reset of I2C clock */
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129 LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C2);
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130
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131 /* Release reset of I2C clock */
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132 LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C2);
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133
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134 }
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135 #if defined(I2C3)
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136 else if (I2Cx == I2C3)
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137 {
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138 /* Force reset of I2C clock */
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139 LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C3);
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140
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141 /* Release reset of I2C clock */
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142 LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C3);
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143 }
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144 #endif
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145 else
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146 {
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147 status = ERROR;
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148 }
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149
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150 return status;
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151 }
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152
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153 /**
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154 * @brief Initialize the I2C registers according to the specified parameters in I2C_InitStruct.
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155 * @param I2Cx I2C Instance.
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156 * @param I2C_InitStruct pointer to a @ref LL_I2C_InitTypeDef structure.
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157 * @retval An ErrorStatus enumeration value:
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158 * - SUCCESS: I2C registers are initialized
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159 * - ERROR: Not applicable
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160 */
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161 uint32_t LL_I2C_Init(I2C_TypeDef *I2Cx, LL_I2C_InitTypeDef *I2C_InitStruct)
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162 {
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163 LL_RCC_ClocksTypeDef rcc_clocks;
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164
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165 /* Check the I2C Instance I2Cx */
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166 assert_param(IS_I2C_ALL_INSTANCE(I2Cx));
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167
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168 /* Check the I2C parameters from I2C_InitStruct */
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169 assert_param(IS_LL_I2C_PERIPHERAL_MODE(I2C_InitStruct->PeripheralMode));
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170 assert_param(IS_LL_I2C_CLOCK_SPEED(I2C_InitStruct->ClockSpeed));
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171 assert_param(IS_LL_I2C_DUTY_CYCLE(I2C_InitStruct->DutyCycle));
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172 #if defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF)
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173 assert_param(IS_LL_I2C_ANALOG_FILTER(I2C_InitStruct->AnalogFilter));
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174 assert_param(IS_LL_I2C_DIGITAL_FILTER(I2C_InitStruct->DigitalFilter));
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175 #endif
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176 assert_param(IS_LL_I2C_OWN_ADDRESS1(I2C_InitStruct->OwnAddress1));
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177 assert_param(IS_LL_I2C_TYPE_ACKNOWLEDGE(I2C_InitStruct->TypeAcknowledge));
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178 assert_param(IS_LL_I2C_OWN_ADDRSIZE(I2C_InitStruct->OwnAddrSize));
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179
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180 /* Disable the selected I2Cx Peripheral */
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181 LL_I2C_Disable(I2Cx);
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182
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183 /* Retrieve Clock frequencies */
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184 LL_RCC_GetSystemClocksFreq(&rcc_clocks);
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185
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186 #if defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF)
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187 /*---------------------------- I2Cx FLTR Configuration -----------------------
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188 * Configure the analog and digital noise filters with parameters :
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189 * - AnalogFilter: I2C_FLTR_ANFOFF bit
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190 * - DigitalFilter: I2C_FLTR_DNF[3:0] bits
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191 */
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192 LL_I2C_ConfigFilters(I2Cx, I2C_InitStruct->AnalogFilter, I2C_InitStruct->DigitalFilter);
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193
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194 #endif
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195 /*---------------------------- I2Cx SCL Clock Speed Configuration ------------
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196 * Configure the SCL speed :
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197 * - ClockSpeed: I2C_CR2_FREQ[5:0], I2C_TRISE_TRISE[5:0], I2C_CCR_FS,
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198 * and I2C_CCR_CCR[11:0] bits
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199 * - DutyCycle: I2C_CCR_DUTY[7:0] bits
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200 */
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201 LL_I2C_ConfigSpeed(I2Cx, rcc_clocks.PCLK1_Frequency, I2C_InitStruct->ClockSpeed, I2C_InitStruct->DutyCycle);
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202
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203 /*---------------------------- I2Cx OAR1 Configuration -----------------------
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204 * Disable, Configure and Enable I2Cx device own address 1 with parameters :
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205 * - OwnAddress1: I2C_OAR1_ADD[9:8], I2C_OAR1_ADD[7:1] and I2C_OAR1_ADD0 bits
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206 * - OwnAddrSize: I2C_OAR1_ADDMODE bit
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207 */
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208 LL_I2C_SetOwnAddress1(I2Cx, I2C_InitStruct->OwnAddress1, I2C_InitStruct->OwnAddrSize);
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209
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210 /*---------------------------- I2Cx MODE Configuration -----------------------
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211 * Configure I2Cx peripheral mode with parameter :
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212 * - PeripheralMode: I2C_CR1_SMBUS, I2C_CR1_SMBTYPE and I2C_CR1_ENARP bits
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213 */
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214 LL_I2C_SetMode(I2Cx, I2C_InitStruct->PeripheralMode);
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215
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216 /* Enable the selected I2Cx Peripheral */
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217 LL_I2C_Enable(I2Cx);
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218
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219 /*---------------------------- I2Cx CR2 Configuration ------------------------
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220 * Configure the ACKnowledge or Non ACKnowledge condition
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221 * after the address receive match code or next received byte with parameter :
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222 * - TypeAcknowledge: I2C_CR2_NACK bit
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223 */
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224 LL_I2C_AcknowledgeNextData(I2Cx, I2C_InitStruct->TypeAcknowledge);
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225
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226 return SUCCESS;
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227 }
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228
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229 /**
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230 * @brief Set each @ref LL_I2C_InitTypeDef field to default value.
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231 * @param I2C_InitStruct Pointer to a @ref LL_I2C_InitTypeDef structure.
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232 * @retval None
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233 */
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234 void LL_I2C_StructInit(LL_I2C_InitTypeDef *I2C_InitStruct)
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235 {
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236 /* Set I2C_InitStruct fields to default values */
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237 I2C_InitStruct->PeripheralMode = LL_I2C_MODE_I2C;
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238 I2C_InitStruct->ClockSpeed = 5000U;
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239 I2C_InitStruct->DutyCycle = LL_I2C_DUTYCYCLE_2;
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240 #if defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF)
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241 I2C_InitStruct->AnalogFilter = LL_I2C_ANALOGFILTER_ENABLE;
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242 I2C_InitStruct->DigitalFilter = 0U;
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243 #endif
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244 I2C_InitStruct->OwnAddress1 = 0U;
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245 I2C_InitStruct->TypeAcknowledge = LL_I2C_NACK;
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246 I2C_InitStruct->OwnAddrSize = LL_I2C_OWNADDRESS1_7BIT;
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247 }
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248
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249 /**
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250 * @}
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251 */
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252
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253 /**
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254 * @}
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255 */
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256
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257 /**
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258 * @}
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259 */
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260
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261 #endif /* I2C1 || I2C2 || I2C3 */
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262
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263 /**
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264 * @}
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265 */
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266
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267 #endif /* USE_FULL_LL_DRIVER */
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268
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269 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/