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 | * @version V1.4.1
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6 | * @date 09-October-2015
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7 | * @brief DMA Extension HAL module driver
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8 | * This file provides firmware functions to manage the following
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9 | * functionalities of the DMA Extension peripheral:
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10 | * + Extended features functions
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11 | *
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12 | @verbatim
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13 | ==============================================================================
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14 | ##### How to use this driver #####
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15 | ==============================================================================
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16 | [..]
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17 | The DMA Extension HAL driver can be used as follows:
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18 | (#) Start a multi buffer transfer using the HAL_DMA_MultiBufferStart() function
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19 | for polling mode or HAL_DMA_MultiBufferStart_IT() for interrupt mode.
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20 |
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21 | -@- In Memory-to-Memory transfer mode, Multi (Double) Buffer mode is not allowed.
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22 | -@- When Multi (Double) Buffer mode is enabled the, transfer is circular by default.
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23 | -@- In Multi (Double) buffer mode, it is possible to update the base address for
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24 | the AHB memory port on the fly (DMA_SxM0AR or DMA_SxM1AR) when the stream is enabled.
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25 |
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26 | @endverbatim
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27 | ******************************************************************************
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28 | * @attention
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29 | *
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30 | * <h2><center>© COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
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31 | *
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32 | * Redistribution and use in source and binary forms, with or without modification,
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33 | * are permitted provided that the following conditions are met:
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34 | * 1. Redistributions of source code must retain the above copyright notice,
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35 | * this list of conditions and the following disclaimer.
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36 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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37 | * this list of conditions and the following disclaimer in the documentation
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38 | * and/or other materials provided with the distribution.
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39 | * 3. Neither the name of STMicroelectronics nor the names of its contributors
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40 | * may be used to endorse or promote products derived from this software
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41 | * without specific prior written permission.
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42 | *
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43 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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44 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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45 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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46 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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47 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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48 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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49 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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50 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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51 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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52 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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53 | *
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54 | ******************************************************************************
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55 | */
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56 |
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57 | /* Includes ------------------------------------------------------------------*/
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58 | #include "stm32f4xx_hal.h"
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59 |
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60 | /** @addtogroup STM32F4xx_HAL_Driver
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61 | * @{
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62 | */
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63 |
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64 | /** @defgroup DMAEx DMAEx
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65 | * @brief DMA Extended HAL module driver
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66 | * @{
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67 | */
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68 |
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69 | #ifdef HAL_DMA_MODULE_ENABLED
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70 |
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71 | /* Private types -------------------------------------------------------------*/
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72 | /* Private variables ---------------------------------------------------------*/
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73 | /* Private Constants ---------------------------------------------------------*/
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74 | /* Private macros ------------------------------------------------------------*/
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75 | /* Private functions ---------------------------------------------------------*/
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76 | /** @addtogroup DMAEx_Private_Functions
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77 | * @{
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78 | */
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79 | static void DMA_MultiBufferSetConfig(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t DataLength);
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80 | /**
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81 | * @}
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82 | */
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83 |
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84 | /* Exported functions ---------------------------------------------------------*/
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85 |
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86 | /** @addtogroup DMAEx_Exported_Functions
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87 | * @{
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88 | */
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89 |
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90 |
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91 | /** @addtogroup DMAEx_Exported_Functions_Group1
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92 | *
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93 | @verbatim
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94 | ===============================================================================
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95 | ##### Extended features functions #####
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96 | ===============================================================================
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97 | [..] This section provides functions allowing to:
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98 | (+) Configure the source, destination address and data length and
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99 | Start MultiBuffer DMA transfer
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100 | (+) Configure the source, destination address and data length and
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101 | Start MultiBuffer DMA transfer with interrupt
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102 | (+) Change on the fly the memory0 or memory1 address.
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103 |
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104 | @endverbatim
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105 | * @{
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106 | */
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107 |
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108 |
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109 | /**
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110 | * @brief Starts the multi_buffer DMA Transfer.
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111 | * @param hdma : pointer to a DMA_HandleTypeDef structure that contains
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112 | * the configuration information for the specified DMA Stream.
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113 | * @param SrcAddress: The source memory Buffer address
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114 | * @param DstAddress: The destination memory Buffer address
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115 | * @param SecondMemAddress: The second memory Buffer address in case of multi buffer Transfer
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116 | * @param DataLength: The length of data to be transferred from source to destination
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117 | * @retval HAL status
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118 | */
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119 | HAL_StatusTypeDef HAL_DMAEx_MultiBufferStart(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t SecondMemAddress, uint32_t DataLength)
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120 | {
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121 | /* Process Locked */
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122 | __HAL_LOCK(hdma);
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123 |
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124 | /* Current memory buffer used is Memory 0 */
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125 | if((hdma->Instance->CR & DMA_SxCR_CT) == 0)
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126 | {
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127 | hdma->State = HAL_DMA_STATE_BUSY_MEM0;
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128 | }
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129 | /* Current memory buffer used is Memory 1 */
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130 | else if((hdma->Instance->CR & DMA_SxCR_CT) != 0)
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131 | {
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132 | hdma->State = HAL_DMA_STATE_BUSY_MEM1;
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133 | }
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134 |
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135 | /* Check the parameters */
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136 | assert_param(IS_DMA_BUFFER_SIZE(DataLength));
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137 |
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138 | /* Disable the peripheral */
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139 | __HAL_DMA_DISABLE(hdma);
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140 |
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141 | /* Enable the double buffer mode */
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142 | hdma->Instance->CR |= (uint32_t)DMA_SxCR_DBM;
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143 |
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144 | /* Configure DMA Stream destination address */
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145 | hdma->Instance->M1AR = SecondMemAddress;
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146 |
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147 | /* Configure the source, destination address and the data length */
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148 | DMA_MultiBufferSetConfig(hdma, SrcAddress, DstAddress, DataLength);
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149 |
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150 | /* Enable the peripheral */
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151 | __HAL_DMA_ENABLE(hdma);
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152 |
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153 | return HAL_OK;
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154 | }
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155 |
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156 | /**
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157 | * @brief Starts the multi_buffer DMA Transfer with interrupt enabled.
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158 | * @param hdma: pointer to a DMA_HandleTypeDef structure that contains
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159 | * the configuration information for the specified DMA Stream.
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160 | * @param SrcAddress: The source memory Buffer address
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161 | * @param DstAddress: The destination memory Buffer address
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162 | * @param SecondMemAddress: The second memory Buffer address in case of multi buffer Transfer
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163 | * @param DataLength: The length of data to be transferred from source to destination
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164 | * @retval HAL status
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165 | */
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166 | 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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167 | {
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168 | /* Process Locked */
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169 | __HAL_LOCK(hdma);
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170 |
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171 | /* Current memory buffer used is Memory 0 */
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172 | if((hdma->Instance->CR & DMA_SxCR_CT) == 0)
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173 | {
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174 | hdma->State = HAL_DMA_STATE_BUSY_MEM0;
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175 | }
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176 | /* Current memory buffer used is Memory 1 */
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177 | else if((hdma->Instance->CR & DMA_SxCR_CT) != 0)
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178 | {
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179 | hdma->State = HAL_DMA_STATE_BUSY_MEM1;
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180 | }
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181 |
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182 | /* Check the parameters */
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183 | assert_param(IS_DMA_BUFFER_SIZE(DataLength));
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184 |
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185 | /* Disable the peripheral */
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186 | __HAL_DMA_DISABLE(hdma);
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187 |
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188 | /* Enable the Double buffer mode */
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189 | hdma->Instance->CR |= (uint32_t)DMA_SxCR_DBM;
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190 |
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191 | /* Configure DMA Stream destination address */
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192 | hdma->Instance->M1AR = SecondMemAddress;
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193 |
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194 | /* Configure the source, destination address and the data length */
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195 | DMA_MultiBufferSetConfig(hdma, SrcAddress, DstAddress, DataLength);
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196 |
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197 | /* Enable the transfer complete interrupt */
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198 | __HAL_DMA_ENABLE_IT(hdma, DMA_IT_TC);
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199 |
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200 | /* Enable the Half transfer interrupt */
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201 | __HAL_DMA_ENABLE_IT(hdma, DMA_IT_HT);
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202 |
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203 | /* Enable the transfer Error interrupt */
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204 | __HAL_DMA_ENABLE_IT(hdma, DMA_IT_TE);
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205 |
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206 | /* Enable the fifo Error interrupt */
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207 | __HAL_DMA_ENABLE_IT(hdma, DMA_IT_FE);
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208 |
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209 | /* Enable the direct mode Error interrupt */
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210 | __HAL_DMA_ENABLE_IT(hdma, DMA_IT_DME);
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211 |
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212 | /* Enable the peripheral */
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213 | __HAL_DMA_ENABLE(hdma);
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214 |
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215 | return HAL_OK;
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216 | }
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217 |
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218 | /**
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219 | * @brief Change the memory0 or memory1 address on the fly.
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220 | * @param hdma: pointer to a DMA_HandleTypeDef structure that contains
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221 | * the configuration information for the specified DMA Stream.
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222 | * @param Address: The new address
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223 | * @param memory: the memory to be changed, This parameter can be one of
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224 | * the following values:
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225 | * MEMORY0 /
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226 | * MEMORY1
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227 | * @note The MEMORY0 address can be changed only when the current transfer use
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228 | * MEMORY1 and the MEMORY1 address can be changed only when the current
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229 | * transfer use MEMORY0.
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230 | * @retval HAL status
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231 | */
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232 | HAL_StatusTypeDef HAL_DMAEx_ChangeMemory(DMA_HandleTypeDef *hdma, uint32_t Address, HAL_DMA_MemoryTypeDef memory)
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233 | {
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234 | if(memory == MEMORY0)
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235 | {
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236 | /* change the memory0 address */
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237 | hdma->Instance->M0AR = Address;
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238 | }
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239 | else
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240 | {
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241 | /* change the memory1 address */
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242 | hdma->Instance->M1AR = Address;
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243 | }
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244 |
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245 | return HAL_OK;
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246 | }
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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 | /** @addtogroup DMAEx_Private_Functions
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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 | * @brief Set the DMA Transfer parameter.
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262 | * @param hdma: pointer to a DMA_HandleTypeDef structure that contains
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263 | * the configuration information for the specified DMA Stream.
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264 | * @param SrcAddress: The source memory Buffer address
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265 | * @param DstAddress: The destination memory Buffer address
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266 | * @param DataLength: The length of data to be transferred from source to destination
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267 | * @retval HAL status
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268 | */
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269 | static void DMA_MultiBufferSetConfig(DMA_HandleTypeDef *hdma, uint32_t SrcAddress, uint32_t DstAddress, uint32_t DataLength)
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270 | {
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271 | /* Configure DMA Stream data length */
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272 | hdma->Instance->NDTR = DataLength;
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273 |
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274 | /* Peripheral to Memory */
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275 | if((hdma->Init.Direction) == DMA_MEMORY_TO_PERIPH)
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276 | {
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277 | /* Configure DMA Stream destination address */
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278 | hdma->Instance->PAR = DstAddress;
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279 |
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280 | /* Configure DMA Stream source address */
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281 | hdma->Instance->M0AR = SrcAddress;
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282 | }
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283 | /* Memory to Peripheral */
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284 | else
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285 | {
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286 | /* Configure DMA Stream source address */
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287 | hdma->Instance->PAR = SrcAddress;
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288 |
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289 | /* Configure DMA Stream destination address */
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290 | hdma->Instance->M0AR = DstAddress;
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291 | }
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292 | }
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293 |
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294 | /**
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295 | * @}
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296 | */
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297 |
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298 | #endif /* HAL_DMA_MODULE_ENABLED */
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299 | /**
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300 | * @}
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301 | */
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302 |
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303 | /**
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304 | * @}
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305 | */
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306 |
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307 | /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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