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annotate Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_ll_lptim.c @ 220:e524a824d8f2 Improve_IPC_Sync

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Added schedule point for functions executed once in a second SPI communication takes place every 100ms triggered by the master (main). Synchronisation is done using the SPI RX complete callback which is called ~4ms after communication was started. In the previous implementation this could happen in parallel to usage of data. To solve this potential problem the execution of functions called once a second was moved from 1000ms to 980ms giving a 20ms window for execution.
author ideenmodellierer
date Sun, 31 Mar 2019 15:49:47 +0200
parents c78bcbd5deda
children
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1 /**
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2 ******************************************************************************
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3 * @file stm32f4xx_ll_lptim.c
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4 * @author MCD Application Team
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5 * @brief LPTIM 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_lptim.h"
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39 #include "stm32f4xx_ll_bus.h"
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40
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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 (LPTIM1) || defined (LPTIM2)
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52
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53 /** @addtogroup LPTIM_LL
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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 LPTIM_LL_Private_Macros
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62 * @{
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63 */
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64 #define IS_LPTIM_CLOCK_SOURCE(__VALUE__) (((__VALUE__) == LL_LPTIM_CLK_SOURCE_INTERNAL) \
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65 || ((__VALUE__) == LL_LPTIM_CLK_SOURCE_EXTERNAL))
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66
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67 #define IS_LPTIM_CLOCK_PRESCALER(__VALUE__) (((__VALUE__) == LL_LPTIM_PRESCALER_DIV1) \
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68 || ((__VALUE__) == LL_LPTIM_PRESCALER_DIV2) \
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69 || ((__VALUE__) == LL_LPTIM_PRESCALER_DIV4) \
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70 || ((__VALUE__) == LL_LPTIM_PRESCALER_DIV8) \
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71 || ((__VALUE__) == LL_LPTIM_PRESCALER_DIV16) \
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72 || ((__VALUE__) == LL_LPTIM_PRESCALER_DIV32) \
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73 || ((__VALUE__) == LL_LPTIM_PRESCALER_DIV64) \
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74 || ((__VALUE__) == LL_LPTIM_PRESCALER_DIV128))
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75
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76 #define IS_LPTIM_WAVEFORM(__VALUE__) (((__VALUE__) == LL_LPTIM_OUTPUT_WAVEFORM_PWM) \
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77 || ((__VALUE__) == LL_LPTIM_OUTPUT_WAVEFORM_SETONCE))
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78
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79 #define IS_LPTIM_OUTPUT_POLARITY(__VALUE__) (((__VALUE__) == LL_LPTIM_OUTPUT_POLARITY_REGULAR) \
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80 || ((__VALUE__) == LL_LPTIM_OUTPUT_POLARITY_INVERSE))
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81 /**
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82 * @}
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83 */
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84
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85
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86 /* Private function prototypes -----------------------------------------------*/
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87 /* Exported functions --------------------------------------------------------*/
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88 /** @addtogroup LPTIM_LL_Exported_Functions
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89 * @{
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90 */
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91
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92 /** @addtogroup LPTIM_LL_EF_Init
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93 * @{
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94 */
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95
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96 /**
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97 * @brief Set LPTIMx registers to their reset values.
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98 * @param LPTIMx LP Timer instance
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99 * @retval An ErrorStatus enumeration value:
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100 * - SUCCESS: LPTIMx registers are de-initialized
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101 * - ERROR: invalid LPTIMx instance
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102 */
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103 ErrorStatus LL_LPTIM_DeInit(LPTIM_TypeDef* LPTIMx)
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104 {
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105 ErrorStatus result = SUCCESS;
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106
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107 /* Check the parameters */
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108 assert_param(IS_LPTIM_INSTANCE(LPTIMx));
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109
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110 if (LPTIMx == LPTIM1)
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111 {
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112 LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_LPTIM1);
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113 LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_LPTIM1);
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114 }
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115 #if defined(LPTIM2)
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116 else if (LPTIMx == LPTIM2)
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117 {
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118 LL_APB1_GRP2_ForceReset(LL_APB1_GRP2_PERIPH_LPTIM2);
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119 LL_APB1_GRP2_ReleaseReset(LL_APB1_GRP2_PERIPH_LPTIM2);
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120 }
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121 #endif
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122 else
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123 {
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124 result = ERROR;
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125 }
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126
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127 return result;
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128 }
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129
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130 /**
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131 * @brief Set each fields of the LPTIM_InitStruct structure to its default
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132 * value.
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133 * @param LPTIM_InitStruct pointer to a @ref LL_LPTIM_InitTypeDef structure
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134 * @retval None
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135 */
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136 void LL_LPTIM_StructInit(LL_LPTIM_InitTypeDef* LPTIM_InitStruct)
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137 {
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138 /* Set the default configuration */
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139 LPTIM_InitStruct->ClockSource = LL_LPTIM_CLK_SOURCE_INTERNAL;
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140 LPTIM_InitStruct->Prescaler = LL_LPTIM_PRESCALER_DIV1;
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141 LPTIM_InitStruct->Waveform = LL_LPTIM_OUTPUT_WAVEFORM_PWM;
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142 LPTIM_InitStruct->Polarity = LL_LPTIM_OUTPUT_POLARITY_REGULAR;
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143 }
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144
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145 /**
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146 * @brief Configure the LPTIMx peripheral according to the specified parameters.
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147 * @note LL_LPTIM_Init can only be called when the LPTIM instance is disabled.
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148 * @note LPTIMx can be disabled using unitary function @ref LL_LPTIM_Disable().
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149 * @param LPTIMx LP Timer Instance
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150 * @param LPTIM_InitStruct pointer to a @ref LL_LPTIM_InitTypeDef structure
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151 * @retval An ErrorStatus enumeration value:
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152 * - SUCCESS: LPTIMx instance has been initialized
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153 * - ERROR: LPTIMx instance hasn't been initialized
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154 */
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155 ErrorStatus LL_LPTIM_Init(LPTIM_TypeDef * LPTIMx, LL_LPTIM_InitTypeDef* LPTIM_InitStruct)
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156 {
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157 ErrorStatus result = SUCCESS;
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158
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159 /* The LPTIMx_CFGR register must only be modified when the LPTIM is disabled
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160 (ENABLE bit is reset to 0).
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161 */
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162 if (LL_LPTIM_IsEnabled(LPTIMx))
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163 {
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164 result = ERROR;
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165 }
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166 else
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167 {
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168 /* Check the parameters */
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169 assert_param(IS_LPTIM_INSTANCE(LPTIMx));
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170 assert_param(IS_LPTIM_CLOCK_SOURCE(LPTIM_InitStruct->ClockSource));
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171 assert_param(IS_LPTIM_CLOCK_PRESCALER(LPTIM_InitStruct->Prescaler));
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172 assert_param(IS_LPTIM_WAVEFORM(LPTIM_InitStruct->Waveform));
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173 assert_param(IS_LPTIM_OUTPUT_POLARITY(LPTIM_InitStruct->Polarity));
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174
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175 /* Set CKSEL bitfield according to ClockSource value */
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176 /* Set PRESC bitfield according to Prescaler value */
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177 /* Set WAVE bitfield according to Waveform value */
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178 /* Set WAVEPOL bitfield according to Polarity value */
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179 MODIFY_REG(LPTIMx->CFGR,
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180 (LPTIM_CFGR_CKSEL | LPTIM_CFGR_PRESC | LPTIM_CFGR_WAVE| LPTIM_CFGR_WAVPOL),
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181 LPTIM_InitStruct->ClockSource | \
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182 LPTIM_InitStruct->Prescaler | \
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183 LPTIM_InitStruct->Waveform | \
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184 LPTIM_InitStruct->Polarity);
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185 }
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186
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187 return result;
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188 }
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189
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190 /**
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191 * @}
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192 */
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193
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194 /**
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195 * @}
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196 */
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197
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198 /**
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199 * @}
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200 */
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201
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202 #endif /* defined (LPTIM1) || defined (LPTIM2) */
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203
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204 /**
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205 * @}
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206 */
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207
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208 #endif /* USE_FULL_LL_DRIVER */
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209
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210 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/