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annotate Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_dma_ex.c @ 230:3973208c4a20 div-fixes-4-1

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cleanup: make return void when never used The schedule_update_timer_helper() function returned a value that is never used. In fact, its only called with constants -1 and 0, so there is still some unused functionality here. In all: trivial cleanup. Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
author Jan Mulder <jlmulder@xs4all.nl>
date Wed, 03 Apr 2019 14:16:59 +0200
parents c78bcbd5deda
children
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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****/