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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 * @version V1.2.0
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6 * @date 26-December-2014
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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) 2014 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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