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annotate Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_dma_ex.c @ 198:878dc9e0dbc5 div-fixes-cleaup-2

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cleanup: another cleanup session (data_exchange_main.c) Cleanup all kinds of stuff in one of the core functions. Made local data static, with 1 already existing exception (the dataIn data). For this, a trivial change is made in t7.c. In addition, not used code, and commented out code that seems highly obsolete is removed. Another tiny step in code that is better to maintain in the future. Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
author Jan Mulder <jlmulder@xs4all.nl>
date Thu, 21 Mar 2019 15:28:47 +0100
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1 /**
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2 ******************************************************************************
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3 * @file stm32f4xx_hal_dma_ex.c
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4 * @author MCD Application Team
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5 * @brief DMA Extension HAL module driver
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6 * This file provides firmware functions to manage the following
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7 * functionalities of the DMA Extension peripheral:
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8 * + Extended features functions
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9 *
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10 @verbatim
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11 ==============================================================================
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12 ##### How to use this driver #####
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13 ==============================================================================
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14 [..]
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15 The DMA Extension HAL driver can be used as follows:
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16 (#) Start a multi buffer transfer using the HAL_DMA_MultiBufferStart() function
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17 for polling mode or HAL_DMA_MultiBufferStart_IT() for interrupt mode.
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18
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19 -@- In Memory-to-Memory transfer mode, Multi (Double) Buffer mode is not allowed.
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20 -@- When Multi (Double) Buffer mode is enabled the, transfer is circular by default.
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21 -@- In Multi (Double) buffer mode, it is possible to update the base address for
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22 the AHB memory port on the fly (DMA_SxM0AR or DMA_SxM1AR) when the stream is enabled.
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23
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24 @endverbatim
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25 ******************************************************************************
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26 * @attention
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27 *
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28 * <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
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29 *
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30 * Redistribution and use in source and binary forms, with or without modification,
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31 * are permitted provided that the following conditions are met:
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32 * 1. Redistributions of source code must retain the above copyright notice,
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33 * this list of conditions and the following disclaimer.
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34 * 2. Redistributions in binary form must reproduce the above copyright notice,
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35 * this list of conditions and the following disclaimer in the documentation
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36 * and/or other materials provided with the distribution.
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37 * 3. Neither the name of STMicroelectronics nor the names of its contributors
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38 * may be used to endorse or promote products derived from this software
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39 * without specific prior written permission.
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40 *
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41 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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42 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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44 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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47 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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48 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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49 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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50 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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51 *
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52 ******************************************************************************
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53 */
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54
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55 /* Includes ------------------------------------------------------------------*/
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56 #include "stm32f4xx_hal.h"
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57
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58 /** @addtogroup STM32F4xx_HAL_Driver
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59 * @{
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60 */
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61
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62 /** @defgroup DMAEx DMAEx
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63 * @brief DMA Extended HAL module driver
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64 * @{
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65 */
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66
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67 #ifdef HAL_DMA_MODULE_ENABLED
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68
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69 /* Private types -------------------------------------------------------------*/
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70 /* Private variables ---------------------------------------------------------*/
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71 /* Private Constants ---------------------------------------------------------*/
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72 /* Private macros ------------------------------------------------------------*/
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73 /* Private functions ---------------------------------------------------------*/
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74 /** @addtogroup DMAEx_Private_Functions
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75 * @{
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76 */
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77 static void DMA_MultiBufferSetConfig(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t DataLength);
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78 /**
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79 * @}
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80 */
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81
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82 /* Exported functions ---------------------------------------------------------*/
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83
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84 /** @addtogroup DMAEx_Exported_Functions
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85 * @{
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86 */
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87
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88
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89 /** @addtogroup DMAEx_Exported_Functions_Group1
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90 *
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91 @verbatim
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92 ===============================================================================
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93 ##### Extended features functions #####
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94 ===============================================================================
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95 [..] This section provides functions allowing to:
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96 (+) Configure the source, destination address and data length and
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97 Start MultiBuffer DMA transfer
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98 (+) Configure the source, destination address and data length and
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99 Start MultiBuffer DMA transfer with interrupt
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100 (+) Change on the fly the memory0 or memory1 address.
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101
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102 @endverbatim
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103 * @{
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104 */
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105
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106
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107 /**
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108 * @brief Starts the multi_buffer DMA Transfer.
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109 * @param hdma pointer to a DMA_HandleTypeDef structure that contains
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110 * the configuration information for the specified DMA Stream.
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111 * @param SrcAddress The source memory Buffer address
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112 * @param DstAddress The destination memory Buffer address
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113 * @param SecondMemAddress The second memory Buffer address in case of multi buffer Transfer
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114 * @param DataLength The length of data to be transferred from source to destination
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115 * @retval HAL status
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116 */
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117 HAL_StatusTypeDef HAL_DMAEx_MultiBufferStart(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t SecondMemAddress, uint32_t DataLength)
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118 {
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119 HAL_StatusTypeDef status = HAL_OK;
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120
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121 /* Check the parameters */
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122 assert_param(IS_DMA_BUFFER_SIZE(DataLength));
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123
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124 /* Memory-to-memory transfer not supported in double buffering mode */
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125 if (hdma->Init.Direction == DMA_MEMORY_TO_MEMORY)
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126 {
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127 hdma->ErrorCode = HAL_DMA_ERROR_NOT_SUPPORTED;
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128 status = HAL_ERROR;
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129 }
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130 else
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131 {
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132 /* Process Locked */
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133 __HAL_LOCK(hdma);
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134
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135 if(HAL_DMA_STATE_READY == hdma->State)
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136 {
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137 /* Change DMA peripheral state */
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138 hdma->State = HAL_DMA_STATE_BUSY;
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139
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140 /* Enable the double buffer mode */
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141 hdma->Instance->CR |= (uint32_t)DMA_SxCR_DBM;
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142
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143 /* Configure DMA Stream destination address */
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144 hdma->Instance->M1AR = SecondMemAddress;
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145
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146 /* Configure the source, destination address and the data length */
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147 DMA_MultiBufferSetConfig(hdma, SrcAddress, DstAddress, DataLength);
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148
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149 /* Enable the peripheral */
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150 __HAL_DMA_ENABLE(hdma);
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151 }
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152 else
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153 {
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154 /* Return error status */
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155 status = HAL_BUSY;
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156 }
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157 }
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158 return status;
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159 }
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160
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161 /**
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162 * @brief Starts the multi_buffer DMA Transfer with interrupt enabled.
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163 * @param hdma pointer to a DMA_HandleTypeDef structure that contains
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164 * the configuration information for the specified DMA Stream.
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165 * @param SrcAddress The source memory Buffer address
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166 * @param DstAddress The destination memory Buffer address
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167 * @param SecondMemAddress The second memory Buffer address in case of multi buffer Transfer
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168 * @param DataLength The length of data to be transferred from source to destination
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169 * @retval HAL status
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170 */
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171 HAL_StatusTypeDef HAL_DMAEx_MultiBufferStart_IT(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t SecondMemAddress, uint32_t DataLength)
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172 {
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173 HAL_StatusTypeDef status = HAL_OK;
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174
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175 /* Check the parameters */
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176 assert_param(IS_DMA_BUFFER_SIZE(DataLength));
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177
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178 /* Memory-to-memory transfer not supported in double buffering mode */
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179 if (hdma->Init.Direction == DMA_MEMORY_TO_MEMORY)
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180 {
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181 hdma->ErrorCode = HAL_DMA_ERROR_NOT_SUPPORTED;
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182 return HAL_ERROR;
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183 }
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184
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185 /* Check callback functions */
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186 if ((NULL == hdma->XferCpltCallback) || (NULL == hdma->XferM1CpltCallback) || (NULL == hdma->XferErrorCallback))
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187 {
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188 hdma->ErrorCode = HAL_DMA_ERROR_PARAM;
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189 return HAL_ERROR;
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190 }
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191
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192 /* Process locked */
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193 __HAL_LOCK(hdma);
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194
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195 if(HAL_DMA_STATE_READY == hdma->State)
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196 {
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197 /* Change DMA peripheral state */
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198 hdma->State = HAL_DMA_STATE_BUSY;
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199
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200 /* Initialize the error code */
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201 hdma->ErrorCode = HAL_DMA_ERROR_NONE;
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202
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203 /* Enable the Double buffer mode */
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204 hdma->Instance->CR |= (uint32_t)DMA_SxCR_DBM;
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205
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206 /* Configure DMA Stream destination address */
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207 hdma->Instance->M1AR = SecondMemAddress;
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208
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209 /* Configure the source, destination address and the data length */
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210 DMA_MultiBufferSetConfig(hdma, SrcAddress, DstAddress, DataLength);
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211
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212 /* Clear all flags */
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213 __HAL_DMA_CLEAR_FLAG (hdma, __HAL_DMA_GET_TC_FLAG_INDEX(hdma));
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214 __HAL_DMA_CLEAR_FLAG (hdma, __HAL_DMA_GET_HT_FLAG_INDEX(hdma));
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215 __HAL_DMA_CLEAR_FLAG (hdma, __HAL_DMA_GET_TE_FLAG_INDEX(hdma));
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216 __HAL_DMA_CLEAR_FLAG (hdma, __HAL_DMA_GET_DME_FLAG_INDEX(hdma));
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217 __HAL_DMA_CLEAR_FLAG (hdma, __HAL_DMA_GET_FE_FLAG_INDEX(hdma));
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218
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219 /* Enable Common interrupts*/
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220 hdma->Instance->CR |= DMA_IT_TC | DMA_IT_TE | DMA_IT_DME;
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221 hdma->Instance->FCR |= DMA_IT_FE;
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222
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223 if((hdma->XferHalfCpltCallback != NULL) || (hdma->XferM1HalfCpltCallback != NULL))
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224 {
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225 hdma->Instance->CR |= DMA_IT_HT;
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226 }
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227
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228 /* Enable the peripheral */
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229 __HAL_DMA_ENABLE(hdma);
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230 }
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231 else
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232 {
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233 /* Process unlocked */
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234 __HAL_UNLOCK(hdma);
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235
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236 /* Return error status */
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237 status = HAL_BUSY;
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238 }
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239 return status;
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240 }
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241
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242 /**
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243 * @brief Change the memory0 or memory1 address on the fly.
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244 * @param hdma pointer to a DMA_HandleTypeDef structure that contains
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245 * the configuration information for the specified DMA Stream.
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246 * @param Address The new address
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247 * @param memory the memory to be changed, This parameter can be one of
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248 * the following values:
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249 * MEMORY0 /
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250 * MEMORY1
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251 * @note The MEMORY0 address can be changed only when the current transfer use
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252 * MEMORY1 and the MEMORY1 address can be changed only when the current
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253 * transfer use MEMORY0.
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254 * @retval HAL status
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255 */
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256 HAL_StatusTypeDef HAL_DMAEx_ChangeMemory(DMA_HandleTypeDef *hdma, uint32_t Address, HAL_DMA_MemoryTypeDef memory)
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257 {
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258 if(memory == MEMORY0)
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259 {
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260 /* change the memory0 address */
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261 hdma->Instance->M0AR = Address;
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262 }
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263 else
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264 {
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265 /* change the memory1 address */
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266 hdma->Instance->M1AR = Address;
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267 }
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268
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269 return HAL_OK;
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270 }
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271
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272 /**
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273 * @}
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274 */
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275
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276 /**
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277 * @}
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278 */
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279
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280 /** @addtogroup DMAEx_Private_Functions
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281 * @{
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282 */
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283
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284 /**
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285 * @brief Set the DMA Transfer parameter.
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286 * @param hdma pointer to a DMA_HandleTypeDef structure that contains
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287 * the configuration information for the specified DMA Stream.
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288 * @param SrcAddress The source memory Buffer address
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289 * @param DstAddress The destination memory Buffer address
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290 * @param DataLength The length of data to be transferred from source to destination
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291 * @retval HAL status
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292 */
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293 static void DMA_MultiBufferSetConfig(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t DataLength)
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294 {
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295 /* Configure DMA Stream data length */
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296 hdma->Instance->NDTR = DataLength;
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297
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298 /* Peripheral to Memory */
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299 if((hdma->Init.Direction) == DMA_MEMORY_TO_PERIPH)
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300 {
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301 /* Configure DMA Stream destination address */
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302 hdma->Instance->PAR = DstAddress;
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303
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304 /* Configure DMA Stream source address */
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305 hdma->Instance->M0AR = SrcAddress;
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306 }
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307 /* Memory to Peripheral */
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308 else
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309 {
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310 /* Configure DMA Stream source address */
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311 hdma->Instance->PAR = SrcAddress;
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312
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313 /* Configure DMA Stream destination address */
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314 hdma->Instance->M0AR = DstAddress;
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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 #endif /* HAL_DMA_MODULE_ENABLED */
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323 /**
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324 * @}
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325 */
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326
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327 /**
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328 * @}
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329 */
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330
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331 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/