www.pudn.com > STM32F107-ucosii.rar > stm32f10x_dma.c, change:2009-06-23,size:28116b


/** 
  ****************************************************************************** 
  * @file    stm32f10x_dma.c 
  * @author  MCD Application Team 
  * @version V3.1.0 
  * @date    06/19/2009 
  * @brief   This file provides all the DMA firmware functions. 
  ****************************************************************************** 
  * @copy 
  * 
  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS 
  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE 
  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY 
  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING 
  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE 
  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. 
  * 
  * <h2><center>© COPYRIGHT 2009 STMicroelectronics</center></h2> 
  */  
 
/* Includes ------------------------------------------------------------------*/ 
#include "stm32f10x_dma.h" 
#include "stm32f10x_rcc.h" 
 
/** @addtogroup STM32F10x_StdPeriph_Driver 
  * @{ 
  */ 
 
/** @defgroup DMA  
  * @brief DMA driver modules 
  * @{ 
  */  
 
/** @defgroup DMA_Private_TypesDefinitions 
  * @{ 
  */  
/** 
  * @} 
  */ 
 
/** @defgroup DMA_Private_Defines 
  * @{ 
  */ 
 
/* DMA ENABLE mask */ 
#define CCR_ENABLE_Set          ((uint32_t)0x00000001) 
#define CCR_ENABLE_Reset        ((uint32_t)0xFFFFFFFE) 
 
/* DMA1 Channelx interrupt pending bit masks */ 
#define DMA1_Channel1_IT_Mask    ((uint32_t)0x0000000F) 
#define DMA1_Channel2_IT_Mask    ((uint32_t)0x000000F0) 
#define DMA1_Channel3_IT_Mask    ((uint32_t)0x00000F00) 
#define DMA1_Channel4_IT_Mask    ((uint32_t)0x0000F000) 
#define DMA1_Channel5_IT_Mask    ((uint32_t)0x000F0000) 
#define DMA1_Channel6_IT_Mask    ((uint32_t)0x00F00000) 
#define DMA1_Channel7_IT_Mask    ((uint32_t)0x0F000000) 
 
/* DMA2 Channelx interrupt pending bit masks */ 
#define DMA2_Channel1_IT_Mask    ((uint32_t)0x0000000F) 
#define DMA2_Channel2_IT_Mask    ((uint32_t)0x000000F0) 
#define DMA2_Channel3_IT_Mask    ((uint32_t)0x00000F00) 
#define DMA2_Channel4_IT_Mask    ((uint32_t)0x0000F000) 
#define DMA2_Channel5_IT_Mask    ((uint32_t)0x000F0000) 
 
/* DMA2 FLAG mask */ 
#define FLAG_Mask                ((uint32_t)0x10000000) 
 
/* DMA registers Masks */ 
#define CCR_CLEAR_Mask           ((uint32_t)0xFFFF800F) 
 
/** 
  * @} 
  */ 
 
/** @defgroup DMA_Private_Macros 
  * @{ 
  */ 
 
/** 
  * @} 
  */ 
 
/** @defgroup DMA_Private_Variables 
  * @{ 
  */ 
 
/** 
  * @} 
  */ 
 
/** @defgroup DMA_Private_FunctionPrototypes 
  * @{ 
  */ 
 
/** 
  * @} 
  */ 
 
/** @defgroup DMA_Private_Functions 
  * @{ 
  */ 
 
/** 
  * @brief  Deinitializes the DMAy Channelx registers to their default reset 
  *   values. 
  * @param  DMAy_Channelx: where y can be 1 or 2 to select the DMA and 
  *   x can be 1 to 7 for DMA1 and 1 to 5 for DMA2 to select the DMA Channel. 
  * @retval None 
  */ 
void DMA_DeInit(DMA_Channel_TypeDef* DMAy_Channelx) 
{ 
  /* Check the parameters */ 
  assert_param(IS_DMA_ALL_PERIPH(DMAy_Channelx)); 
  /* Disable the selected DMAy Channelx */ 
  DMAy_Channelx->CCR &= CCR_ENABLE_Reset; 
  /* Reset DMAy Channelx control register */ 
  DMAy_Channelx->CCR  = 0; 
   
  /* Reset DMAy Channelx remaining bytes register */ 
  DMAy_Channelx->CNDTR = 0; 
   
  /* Reset DMAy Channelx peripheral address register */ 
  DMAy_Channelx->CPAR  = 0; 
   
  /* Reset DMAy Channelx memory address register */ 
  DMAy_Channelx->CMAR = 0; 
   
  if (DMAy_Channelx == DMA1_Channel1) 
  { 
    /* Reset interrupt pending bits for DMA1 Channel1 */ 
    DMA1->IFCR |= DMA1_Channel1_IT_Mask; 
  } 
  else if (DMAy_Channelx == DMA1_Channel2) 
  { 
    /* Reset interrupt pending bits for DMA1 Channel2 */ 
    DMA1->IFCR |= DMA1_Channel2_IT_Mask; 
  } 
  else if (DMAy_Channelx == DMA1_Channel3) 
  { 
    /* Reset interrupt pending bits for DMA1 Channel3 */ 
    DMA1->IFCR |= DMA1_Channel3_IT_Mask; 
  } 
  else if (DMAy_Channelx == DMA1_Channel4) 
  { 
    /* Reset interrupt pending bits for DMA1 Channel4 */ 
    DMA1->IFCR |= DMA1_Channel4_IT_Mask; 
  } 
  else if (DMAy_Channelx == DMA1_Channel5) 
  { 
    /* Reset interrupt pending bits for DMA1 Channel5 */ 
    DMA1->IFCR |= DMA1_Channel5_IT_Mask; 
  } 
  else if (DMAy_Channelx == DMA1_Channel6) 
  { 
    /* Reset interrupt pending bits for DMA1 Channel6 */ 
    DMA1->IFCR |= DMA1_Channel6_IT_Mask; 
  } 
  else if (DMAy_Channelx == DMA1_Channel7) 
  { 
    /* Reset interrupt pending bits for DMA1 Channel7 */ 
    DMA1->IFCR |= DMA1_Channel7_IT_Mask; 
  } 
  else if (DMAy_Channelx == DMA2_Channel1) 
  { 
    /* Reset interrupt pending bits for DMA2 Channel1 */ 
    DMA2->IFCR |= DMA2_Channel1_IT_Mask; 
  } 
  else if (DMAy_Channelx == DMA2_Channel2) 
  { 
    /* Reset interrupt pending bits for DMA2 Channel2 */ 
    DMA2->IFCR |= DMA2_Channel2_IT_Mask; 
  } 
  else if (DMAy_Channelx == DMA2_Channel3) 
  { 
    /* Reset interrupt pending bits for DMA2 Channel3 */ 
    DMA2->IFCR |= DMA2_Channel3_IT_Mask; 
  } 
  else if (DMAy_Channelx == DMA2_Channel4) 
  { 
    /* Reset interrupt pending bits for DMA2 Channel4 */ 
    DMA2->IFCR |= DMA2_Channel4_IT_Mask; 
  } 
  else 
  {  
    if (DMAy_Channelx == DMA2_Channel5) 
    { 
      /* Reset interrupt pending bits for DMA2 Channel5 */ 
      DMA2->IFCR |= DMA2_Channel5_IT_Mask; 
    } 
  } 
} 
 
/** 
  * @brief  Initializes the DMAy Channelx according to the specified 
  *   parameters in the DMA_InitStruct. 
  * @param  DMAy_Channelx: where y can be 1 or 2 to select the DMA and  
  *   x can be 1 to 7 for DMA1 and 1 to 5 for DMA2 to select the DMA Channel. 
  * @param  DMA_InitStruct: pointer to a DMA_InitTypeDef structure that 
  *   contains the configuration information for the specified DMA Channel. 
  * @retval None 
  */ 
void DMA_Init(DMA_Channel_TypeDef* DMAy_Channelx, DMA_InitTypeDef* DMA_InitStruct) 
{ 
  uint32_t tmpreg = 0; 
 
  /* Check the parameters */ 
  assert_param(IS_DMA_ALL_PERIPH(DMAy_Channelx)); 
  assert_param(IS_DMA_DIR(DMA_InitStruct->DMA_DIR)); 
  assert_param(IS_DMA_BUFFER_SIZE(DMA_InitStruct->DMA_BufferSize)); 
  assert_param(IS_DMA_PERIPHERAL_INC_STATE(DMA_InitStruct->DMA_PeripheralInc)); 
  assert_param(IS_DMA_MEMORY_INC_STATE(DMA_InitStruct->DMA_MemoryInc));    
  assert_param(IS_DMA_PERIPHERAL_DATA_SIZE(DMA_InitStruct->DMA_PeripheralDataSize)); 
  assert_param(IS_DMA_MEMORY_DATA_SIZE(DMA_InitStruct->DMA_MemoryDataSize)); 
  assert_param(IS_DMA_MODE(DMA_InitStruct->DMA_Mode)); 
  assert_param(IS_DMA_PRIORITY(DMA_InitStruct->DMA_Priority)); 
  assert_param(IS_DMA_M2M_STATE(DMA_InitStruct->DMA_M2M)); 
 
/*--------------------------- DMAy Channelx CCR Configuration -----------------*/ 
  /* Get the DMAy_Channelx CCR value */ 
  tmpreg = DMAy_Channelx->CCR; 
  /* Clear MEM2MEM, PL, MSIZE, PSIZE, MINC, PINC, CIRC and DIR bits */ 
  tmpreg &= CCR_CLEAR_Mask; 
  /* Configure DMAy Channelx: data transfer, data size, priority level and mode */ 
  /* Set DIR bit according to DMA_DIR value */ 
  /* Set CIRC bit according to DMA_Mode value */ 
  /* Set PINC bit according to DMA_PeripheralInc value */ 
  /* Set MINC bit according to DMA_MemoryInc value */ 
  /* Set PSIZE bits according to DMA_PeripheralDataSize value */ 
  /* Set MSIZE bits according to DMA_MemoryDataSize value */ 
  /* Set PL bits according to DMA_Priority value */ 
  /* Set the MEM2MEM bit according to DMA_M2M value */ 
  tmpreg |= DMA_InitStruct->DMA_DIR | DMA_InitStruct->DMA_Mode | 
            DMA_InitStruct->DMA_PeripheralInc | DMA_InitStruct->DMA_MemoryInc | 
            DMA_InitStruct->DMA_PeripheralDataSize | DMA_InitStruct->DMA_MemoryDataSize | 
            DMA_InitStruct->DMA_Priority | DMA_InitStruct->DMA_M2M; 
 
  /* Write to DMAy Channelx CCR */ 
  DMAy_Channelx->CCR = tmpreg; 
 
/*--------------------------- DMAy Channelx CNDTR Configuration ---------------*/ 
  /* Write to DMAy Channelx CNDTR */ 
  DMAy_Channelx->CNDTR = DMA_InitStruct->DMA_BufferSize; 
 
/*--------------------------- DMAy Channelx CPAR Configuration ----------------*/ 
  /* Write to DMAy Channelx CPAR */ 
  DMAy_Channelx->CPAR = DMA_InitStruct->DMA_PeripheralBaseAddr; 
 
/*--------------------------- DMAy Channelx CMAR Configuration ----------------*/ 
  /* Write to DMAy Channelx CMAR */ 
  DMAy_Channelx->CMAR = DMA_InitStruct->DMA_MemoryBaseAddr; 
} 
 
/** 
  * @brief  Fills each DMA_InitStruct member with its default value. 
  * @param  DMA_InitStruct : pointer to a DMA_InitTypeDef structure which will 
  *   be initialized. 
  * @retval None 
  */ 
void DMA_StructInit(DMA_InitTypeDef* DMA_InitStruct) 
{ 
/*-------------- Reset DMA init structure parameters values ------------------*/ 
  /* Initialize the DMA_PeripheralBaseAddr member */ 
  DMA_InitStruct->DMA_PeripheralBaseAddr = 0; 
  /* Initialize the DMA_MemoryBaseAddr member */ 
  DMA_InitStruct->DMA_MemoryBaseAddr = 0; 
  /* Initialize the DMA_DIR member */ 
  DMA_InitStruct->DMA_DIR = DMA_DIR_PeripheralSRC; 
  /* Initialize the DMA_BufferSize member */ 
  DMA_InitStruct->DMA_BufferSize = 0; 
  /* Initialize the DMA_PeripheralInc member */ 
  DMA_InitStruct->DMA_PeripheralInc = DMA_PeripheralInc_Disable; 
  /* Initialize the DMA_MemoryInc member */ 
  DMA_InitStruct->DMA_MemoryInc = DMA_MemoryInc_Disable; 
  /* Initialize the DMA_PeripheralDataSize member */ 
  DMA_InitStruct->DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte; 
  /* Initialize the DMA_MemoryDataSize member */ 
  DMA_InitStruct->DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; 
  /* Initialize the DMA_Mode member */ 
  DMA_InitStruct->DMA_Mode = DMA_Mode_Normal; 
  /* Initialize the DMA_Priority member */ 
  DMA_InitStruct->DMA_Priority = DMA_Priority_Low; 
  /* Initialize the DMA_M2M member */ 
  DMA_InitStruct->DMA_M2M = DMA_M2M_Disable; 
} 
 
/** 
  * @brief  Enables or disables the specified DMAy Channelx. 
  * @param  DMAy_Channelx: where y can be 1 or 2 to select the DMA and  
  *   x can be 1 to 7 for DMA1 and 1 to 5 for DMA2 to select the DMA Channel. 
  * @param  NewState: new state of the DMAy Channelx.  
  *   This parameter can be: ENABLE or DISABLE. 
  * @retval None 
  */ 
void DMA_Cmd(DMA_Channel_TypeDef* DMAy_Channelx, FunctionalState NewState) 
{ 
  /* Check the parameters */ 
  assert_param(IS_DMA_ALL_PERIPH(DMAy_Channelx)); 
  assert_param(IS_FUNCTIONAL_STATE(NewState)); 
 
  if (NewState != DISABLE) 
  { 
    /* Enable the selected DMAy Channelx */ 
    DMAy_Channelx->CCR |= CCR_ENABLE_Set; 
  } 
  else 
  { 
    /* Disable the selected DMAy Channelx */ 
    DMAy_Channelx->CCR &= CCR_ENABLE_Reset; 
  } 
} 
 
/** 
  * @brief  Enables or disables the specified DMAy Channelx interrupts. 
  * @param  DMAy_Channelx: where y can be 1 or 2 to select the DMA and  
  *   x can be 1 to 7 for DMA1 and 1 to 5 for DMA2 to select the DMA Channel. 
  * @param  DMA_IT: specifies the DMA interrupts sources to be enabled 
  *   or disabled.  
  *   This parameter can be any combination of the following values: 
  *     @arg DMA_IT_TC:  Transfer complete interrupt mask 
  *     @arg DMA_IT_HT:  Half transfer interrupt mask 
  *     @arg DMA_IT_TE:  Transfer error interrupt mask 
  * @param  NewState: new state of the specified DMA interrupts. 
  *   This parameter can be: ENABLE or DISABLE. 
  * @retval None 
  */ 
void DMA_ITConfig(DMA_Channel_TypeDef* DMAy_Channelx, uint32_t DMA_IT, FunctionalState NewState) 
{ 
  /* Check the parameters */ 
  assert_param(IS_DMA_ALL_PERIPH(DMAy_Channelx)); 
  assert_param(IS_DMA_CONFIG_IT(DMA_IT)); 
  assert_param(IS_FUNCTIONAL_STATE(NewState)); 
  if (NewState != DISABLE) 
  { 
    /* Enable the selected DMA interrupts */ 
    DMAy_Channelx->CCR |= DMA_IT; 
  } 
  else 
  { 
    /* Disable the selected DMA interrupts */ 
    DMAy_Channelx->CCR &= ~DMA_IT; 
  } 
} 
 
/** 
  * @brief  Returns the number of remaining data units in the current 
  *   DMAy Channelx transfer. 
  * @param  DMAy_Channelx: where y can be 1 or 2 to select the DMA and  
  *   x can be 1 to 7 for DMA1 and 1 to 5 for DMA2 to select the DMA Channel. 
  * @retval The number of remaining data units in the current DMAy Channelx 
  *   transfer. 
  */ 
uint16_t DMA_GetCurrDataCounter(DMA_Channel_TypeDef* DMAy_Channelx) 
{ 
  /* Check the parameters */ 
  assert_param(IS_DMA_ALL_PERIPH(DMAy_Channelx)); 
  /* Return the number of remaining data units for DMAy Channelx */ 
  return ((uint16_t)(DMAy_Channelx->CNDTR)); 
} 
 
/** 
  * @brief  Checks whether the specified DMAy Channelx flag is set or not. 
  * @param  DMA_FLAG: specifies the flag to check. 
  *   This parameter can be one of the following values: 
  *     @arg DMA1_FLAG_GL1: DMA1 Channel1 global flag. 
  *     @arg DMA1_FLAG_TC1: DMA1 Channel1 transfer complete flag. 
  *     @arg DMA1_FLAG_HT1: DMA1 Channel1 half transfer flag. 
  *     @arg DMA1_FLAG_TE1: DMA1 Channel1 transfer error flag. 
  *     @arg DMA1_FLAG_GL2: DMA1 Channel2 global flag. 
  *     @arg DMA1_FLAG_TC2: DMA1 Channel2 transfer complete flag. 
  *     @arg DMA1_FLAG_HT2: DMA1 Channel2 half transfer flag. 
  *     @arg DMA1_FLAG_TE2: DMA1 Channel2 transfer error flag. 
  *     @arg DMA1_FLAG_GL3: DMA1 Channel3 global flag. 
  *     @arg DMA1_FLAG_TC3: DMA1 Channel3 transfer complete flag. 
  *     @arg DMA1_FLAG_HT3: DMA1 Channel3 half transfer flag. 
  *     @arg DMA1_FLAG_TE3: DMA1 Channel3 transfer error flag. 
  *     @arg DMA1_FLAG_GL4: DMA1 Channel4 global flag. 
  *     @arg DMA1_FLAG_TC4: DMA1 Channel4 transfer complete flag. 
  *     @arg DMA1_FLAG_HT4: DMA1 Channel4 half transfer flag. 
  *     @arg DMA1_FLAG_TE4: DMA1 Channel4 transfer error flag. 
  *     @arg DMA1_FLAG_GL5: DMA1 Channel5 global flag. 
  *     @arg DMA1_FLAG_TC5: DMA1 Channel5 transfer complete flag. 
  *     @arg DMA1_FLAG_HT5: DMA1 Channel5 half transfer flag. 
  *     @arg DMA1_FLAG_TE5: DMA1 Channel5 transfer error flag. 
  *     @arg DMA1_FLAG_GL6: DMA1 Channel6 global flag. 
  *     @arg DMA1_FLAG_TC6: DMA1 Channel6 transfer complete flag. 
  *     @arg DMA1_FLAG_HT6: DMA1 Channel6 half transfer flag. 
  *     @arg DMA1_FLAG_TE6: DMA1 Channel6 transfer error flag. 
  *     @arg DMA1_FLAG_GL7: DMA1 Channel7 global flag. 
  *     @arg DMA1_FLAG_TC7: DMA1 Channel7 transfer complete flag. 
  *     @arg DMA1_FLAG_HT7: DMA1 Channel7 half transfer flag. 
  *     @arg DMA1_FLAG_TE7: DMA1 Channel7 transfer error flag. 
  *     @arg DMA2_FLAG_GL1: DMA2 Channel1 global flag. 
  *     @arg DMA2_FLAG_TC1: DMA2 Channel1 transfer complete flag. 
  *     @arg DMA2_FLAG_HT1: DMA2 Channel1 half transfer flag. 
  *     @arg DMA2_FLAG_TE1: DMA2 Channel1 transfer error flag. 
  *     @arg DMA2_FLAG_GL2: DMA2 Channel2 global flag. 
  *     @arg DMA2_FLAG_TC2: DMA2 Channel2 transfer complete flag. 
  *     @arg DMA2_FLAG_HT2: DMA2 Channel2 half transfer flag. 
  *     @arg DMA2_FLAG_TE2: DMA2 Channel2 transfer error flag. 
  *     @arg DMA2_FLAG_GL3: DMA2 Channel3 global flag. 
  *     @arg DMA2_FLAG_TC3: DMA2 Channel3 transfer complete flag. 
  *     @arg DMA2_FLAG_HT3: DMA2 Channel3 half transfer flag. 
  *     @arg DMA2_FLAG_TE3: DMA2 Channel3 transfer error flag. 
  *     @arg DMA2_FLAG_GL4: DMA2 Channel4 global flag. 
  *     @arg DMA2_FLAG_TC4: DMA2 Channel4 transfer complete flag. 
  *     @arg DMA2_FLAG_HT4: DMA2 Channel4 half transfer flag. 
  *     @arg DMA2_FLAG_TE4: DMA2 Channel4 transfer error flag. 
  *     @arg DMA2_FLAG_GL5: DMA2 Channel5 global flag. 
  *     @arg DMA2_FLAG_TC5: DMA2 Channel5 transfer complete flag. 
  *     @arg DMA2_FLAG_HT5: DMA2 Channel5 half transfer flag. 
  *     @arg DMA2_FLAG_TE5: DMA2 Channel5 transfer error flag. 
  * @retval The new state of DMA_FLAG (SET or RESET). 
  */ 
FlagStatus DMA_GetFlagStatus(uint32_t DMA_FLAG) 
{ 
  FlagStatus bitstatus = RESET; 
  uint32_t tmpreg = 0; 
  /* Check the parameters */ 
  assert_param(IS_DMA_GET_FLAG(DMA_FLAG)); 
 
  /* Calculate the used DMA */ 
  if ((DMA_FLAG & FLAG_Mask) != (uint32_t)RESET) 
  { 
    /* Get DMA2 ISR register value */ 
    tmpreg = DMA2->ISR ; 
  } 
  else 
  { 
    /* Get DMA1 ISR register value */ 
    tmpreg = DMA1->ISR ; 
  } 
 
  /* Check the status of the specified DMA flag */ 
  if ((tmpreg & DMA_FLAG) != (uint32_t)RESET) 
  { 
    /* DMA_FLAG is set */ 
    bitstatus = SET; 
  } 
  else 
  { 
    /* DMA_FLAG is reset */ 
    bitstatus = RESET; 
  } 
   
  /* Return the DMA_FLAG status */ 
  return  bitstatus; 
} 
 
/** 
  * @brief  Clears the DMAy Channelx's pending flags. 
  * @param  DMA_FLAG: specifies the flag to clear. 
  *   This parameter can be any combination (for the same DMA) of the following values: 
  *     @arg DMA1_FLAG_GL1: DMA1 Channel1 global flag. 
  *     @arg DMA1_FLAG_TC1: DMA1 Channel1 transfer complete flag. 
  *     @arg DMA1_FLAG_HT1: DMA1 Channel1 half transfer flag. 
  *     @arg DMA1_FLAG_TE1: DMA1 Channel1 transfer error flag. 
  *     @arg DMA1_FLAG_GL2: DMA1 Channel2 global flag. 
  *     @arg DMA1_FLAG_TC2: DMA1 Channel2 transfer complete flag. 
  *     @arg DMA1_FLAG_HT2: DMA1 Channel2 half transfer flag. 
  *     @arg DMA1_FLAG_TE2: DMA1 Channel2 transfer error flag. 
  *     @arg DMA1_FLAG_GL3: DMA1 Channel3 global flag. 
  *     @arg DMA1_FLAG_TC3: DMA1 Channel3 transfer complete flag. 
  *     @arg DMA1_FLAG_HT3: DMA1 Channel3 half transfer flag. 
  *     @arg DMA1_FLAG_TE3: DMA1 Channel3 transfer error flag. 
  *     @arg DMA1_FLAG_GL4: DMA1 Channel4 global flag. 
  *     @arg DMA1_FLAG_TC4: DMA1 Channel4 transfer complete flag. 
  *     @arg DMA1_FLAG_HT4: DMA1 Channel4 half transfer flag. 
  *     @arg DMA1_FLAG_TE4: DMA1 Channel4 transfer error flag. 
  *     @arg DMA1_FLAG_GL5: DMA1 Channel5 global flag. 
  *     @arg DMA1_FLAG_TC5: DMA1 Channel5 transfer complete flag. 
  *     @arg DMA1_FLAG_HT5: DMA1 Channel5 half transfer flag. 
  *     @arg DMA1_FLAG_TE5: DMA1 Channel5 transfer error flag. 
  *     @arg DMA1_FLAG_GL6: DMA1 Channel6 global flag. 
  *     @arg DMA1_FLAG_TC6: DMA1 Channel6 transfer complete flag. 
  *     @arg DMA1_FLAG_HT6: DMA1 Channel6 half transfer flag. 
  *     @arg DMA1_FLAG_TE6: DMA1 Channel6 transfer error flag. 
  *     @arg DMA1_FLAG_GL7: DMA1 Channel7 global flag. 
  *     @arg DMA1_FLAG_TC7: DMA1 Channel7 transfer complete flag. 
  *     @arg DMA1_FLAG_HT7: DMA1 Channel7 half transfer flag. 
  *     @arg DMA1_FLAG_TE7: DMA1 Channel7 transfer error flag. 
  *     @arg DMA2_FLAG_GL1: DMA2 Channel1 global flag. 
  *     @arg DMA2_FLAG_TC1: DMA2 Channel1 transfer complete flag. 
  *     @arg DMA2_FLAG_HT1: DMA2 Channel1 half transfer flag. 
  *     @arg DMA2_FLAG_TE1: DMA2 Channel1 transfer error flag. 
  *     @arg DMA2_FLAG_GL2: DMA2 Channel2 global flag. 
  *     @arg DMA2_FLAG_TC2: DMA2 Channel2 transfer complete flag. 
  *     @arg DMA2_FLAG_HT2: DMA2 Channel2 half transfer flag. 
  *     @arg DMA2_FLAG_TE2: DMA2 Channel2 transfer error flag. 
  *     @arg DMA2_FLAG_GL3: DMA2 Channel3 global flag. 
  *     @arg DMA2_FLAG_TC3: DMA2 Channel3 transfer complete flag. 
  *     @arg DMA2_FLAG_HT3: DMA2 Channel3 half transfer flag. 
  *     @arg DMA2_FLAG_TE3: DMA2 Channel3 transfer error flag. 
  *     @arg DMA2_FLAG_GL4: DMA2 Channel4 global flag. 
  *     @arg DMA2_FLAG_TC4: DMA2 Channel4 transfer complete flag. 
  *     @arg DMA2_FLAG_HT4: DMA2 Channel4 half transfer flag. 
  *     @arg DMA2_FLAG_TE4: DMA2 Channel4 transfer error flag. 
  *     @arg DMA2_FLAG_GL5: DMA2 Channel5 global flag. 
  *     @arg DMA2_FLAG_TC5: DMA2 Channel5 transfer complete flag. 
  *     @arg DMA2_FLAG_HT5: DMA2 Channel5 half transfer flag. 
  *     @arg DMA2_FLAG_TE5: DMA2 Channel5 transfer error flag. 
  * @retval None 
  */ 
void DMA_ClearFlag(uint32_t DMA_FLAG) 
{ 
  /* Check the parameters */ 
  assert_param(IS_DMA_CLEAR_FLAG(DMA_FLAG)); 
  /* Calculate the used DMA */ 
 
  if ((DMA_FLAG & FLAG_Mask) != (uint32_t)RESET) 
  { 
    /* Clear the selected DMA flags */ 
    DMA2->IFCR = DMA_FLAG; 
  } 
  else 
  { 
    /* Clear the selected DMA flags */ 
    DMA1->IFCR = DMA_FLAG; 
  } 
} 
 
/** 
  * @brief  Checks whether the specified DMAy Channelx interrupt has occurred or not. 
  * @param  DMA_IT: specifies the DMA interrupt source to check.  
  *   This parameter can be one of the following values: 
  *     @arg DMA1_IT_GL1: DMA1 Channel1 global interrupt. 
  *     @arg DMA1_IT_TC1: DMA1 Channel1 transfer complete interrupt. 
  *     @arg DMA1_IT_HT1: DMA1 Channel1 half transfer interrupt. 
  *     @arg DMA1_IT_TE1: DMA1 Channel1 transfer error interrupt. 
  *     @arg DMA1_IT_GL2: DMA1 Channel2 global interrupt. 
  *     @arg DMA1_IT_TC2: DMA1 Channel2 transfer complete interrupt. 
  *     @arg DMA1_IT_HT2: DMA1 Channel2 half transfer interrupt. 
  *     @arg DMA1_IT_TE2: DMA1 Channel2 transfer error interrupt. 
  *     @arg DMA1_IT_GL3: DMA1 Channel3 global interrupt. 
  *     @arg DMA1_IT_TC3: DMA1 Channel3 transfer complete interrupt. 
  *     @arg DMA1_IT_HT3: DMA1 Channel3 half transfer interrupt. 
  *     @arg DMA1_IT_TE3: DMA1 Channel3 transfer error interrupt. 
  *     @arg DMA1_IT_GL4: DMA1 Channel4 global interrupt. 
  *     @arg DMA1_IT_TC4: DMA1 Channel4 transfer complete interrupt. 
  *     @arg DMA1_IT_HT4: DMA1 Channel4 half transfer interrupt. 
  *     @arg DMA1_IT_TE4: DMA1 Channel4 transfer error interrupt. 
  *     @arg DMA1_IT_GL5: DMA1 Channel5 global interrupt. 
  *     @arg DMA1_IT_TC5: DMA1 Channel5 transfer complete interrupt. 
  *     @arg DMA1_IT_HT5: DMA1 Channel5 half transfer interrupt. 
  *     @arg DMA1_IT_TE5: DMA1 Channel5 transfer error interrupt. 
  *     @arg DMA1_IT_GL6: DMA1 Channel6 global interrupt. 
  *     @arg DMA1_IT_TC6: DMA1 Channel6 transfer complete interrupt. 
  *     @arg DMA1_IT_HT6: DMA1 Channel6 half transfer interrupt. 
  *     @arg DMA1_IT_TE6: DMA1 Channel6 transfer error interrupt. 
  *     @arg DMA1_IT_GL7: DMA1 Channel7 global interrupt. 
  *     @arg DMA1_IT_TC7: DMA1 Channel7 transfer complete interrupt. 
  *     @arg DMA1_IT_HT7: DMA1 Channel7 half transfer interrupt. 
  *     @arg DMA1_IT_TE7: DMA1 Channel7 transfer error interrupt. 
  *     @arg DMA2_IT_GL1: DMA2 Channel1 global interrupt. 
  *     @arg DMA2_IT_TC1: DMA2 Channel1 transfer complete interrupt. 
  *     @arg DMA2_IT_HT1: DMA2 Channel1 half transfer interrupt. 
  *     @arg DMA2_IT_TE1: DMA2 Channel1 transfer error interrupt. 
  *     @arg DMA2_IT_GL2: DMA2 Channel2 global interrupt. 
  *     @arg DMA2_IT_TC2: DMA2 Channel2 transfer complete interrupt. 
  *     @arg DMA2_IT_HT2: DMA2 Channel2 half transfer interrupt. 
  *     @arg DMA2_IT_TE2: DMA2 Channel2 transfer error interrupt. 
  *     @arg DMA2_IT_GL3: DMA2 Channel3 global interrupt. 
  *     @arg DMA2_IT_TC3: DMA2 Channel3 transfer complete interrupt. 
  *     @arg DMA2_IT_HT3: DMA2 Channel3 half transfer interrupt. 
  *     @arg DMA2_IT_TE3: DMA2 Channel3 transfer error interrupt. 
  *     @arg DMA2_IT_GL4: DMA2 Channel4 global interrupt. 
  *     @arg DMA2_IT_TC4: DMA2 Channel4 transfer complete interrupt. 
  *     @arg DMA2_IT_HT4: DMA2 Channel4 half transfer interrupt. 
  *     @arg DMA2_IT_TE4: DMA2 Channel4 transfer error interrupt. 
  *     @arg DMA2_IT_GL5: DMA2 Channel5 global interrupt. 
  *     @arg DMA2_IT_TC5: DMA2 Channel5 transfer complete interrupt. 
  *     @arg DMA2_IT_HT5: DMA2 Channel5 half transfer interrupt. 
  *     @arg DMA2_IT_TE5: DMA2 Channel5 transfer error interrupt. 
  * @retval The new state of DMA_IT (SET or RESET). 
  */ 
ITStatus DMA_GetITStatus(uint32_t DMA_IT) 
{ 
  ITStatus bitstatus = RESET; 
  uint32_t tmpreg = 0; 
  /* Check the parameters */ 
  assert_param(IS_DMA_GET_IT(DMA_IT)); 
 
  /* Calculate the used DMA */ 
  if ((DMA_IT & FLAG_Mask) != (uint32_t)RESET) 
  { 
    /* Get DMA2 ISR register value */ 
    tmpreg = DMA2->ISR ; 
  } 
  else 
  { 
    /* Get DMA1 ISR register value */ 
    tmpreg = DMA1->ISR ; 
  } 
 
  /* Check the status of the specified DMA interrupt */ 
  if ((tmpreg & DMA_IT) != (uint32_t)RESET) 
  { 
    /* DMA_IT is set */ 
    bitstatus = SET; 
  } 
  else 
  { 
    /* DMA_IT is reset */ 
    bitstatus = RESET; 
  } 
  /* Return the DMA_IT status */ 
  return  bitstatus; 
} 
 
/** 
  * @brief  Clears the DMAy Channelx’s interrupt pending bits. 
  * @param  DMA_IT: specifies the DMA interrupt pending bit to clear. 
  *   This parameter can be any combination (for the same DMA) of the following values: 
  *     @arg DMA1_IT_GL1: DMA1 Channel1 global interrupt. 
  *     @arg DMA1_IT_TC1: DMA1 Channel1 transfer complete interrupt. 
  *     @arg DMA1_IT_HT1: DMA1 Channel1 half transfer interrupt. 
  *     @arg DMA1_IT_TE1: DMA1 Channel1 transfer error interrupt. 
  *     @arg DMA1_IT_GL2: DMA1 Channel2 global interrupt. 
  *     @arg DMA1_IT_TC2: DMA1 Channel2 transfer complete interrupt. 
  *     @arg DMA1_IT_HT2: DMA1 Channel2 half transfer interrupt. 
  *     @arg DMA1_IT_TE2: DMA1 Channel2 transfer error interrupt. 
  *     @arg DMA1_IT_GL3: DMA1 Channel3 global interrupt. 
  *     @arg DMA1_IT_TC3: DMA1 Channel3 transfer complete interrupt. 
  *     @arg DMA1_IT_HT3: DMA1 Channel3 half transfer interrupt. 
  *     @arg DMA1_IT_TE3: DMA1 Channel3 transfer error interrupt. 
  *     @arg DMA1_IT_GL4: DMA1 Channel4 global interrupt. 
  *     @arg DMA1_IT_TC4: DMA1 Channel4 transfer complete interrupt. 
  *     @arg DMA1_IT_HT4: DMA1 Channel4 half transfer interrupt. 
  *     @arg DMA1_IT_TE4: DMA1 Channel4 transfer error interrupt. 
  *     @arg DMA1_IT_GL5: DMA1 Channel5 global interrupt. 
  *     @arg DMA1_IT_TC5: DMA1 Channel5 transfer complete interrupt. 
  *     @arg DMA1_IT_HT5: DMA1 Channel5 half transfer interrupt. 
  *     @arg DMA1_IT_TE5: DMA1 Channel5 transfer error interrupt. 
  *     @arg DMA1_IT_GL6: DMA1 Channel6 global interrupt. 
  *     @arg DMA1_IT_TC6: DMA1 Channel6 transfer complete interrupt. 
  *     @arg DMA1_IT_HT6: DMA1 Channel6 half transfer interrupt. 
  *     @arg DMA1_IT_TE6: DMA1 Channel6 transfer error interrupt. 
  *     @arg DMA1_IT_GL7: DMA1 Channel7 global interrupt. 
  *     @arg DMA1_IT_TC7: DMA1 Channel7 transfer complete interrupt. 
  *     @arg DMA1_IT_HT7: DMA1 Channel7 half transfer interrupt. 
  *     @arg DMA1_IT_TE7: DMA1 Channel7 transfer error interrupt. 
  *     @arg DMA2_IT_GL1: DMA2 Channel1 global interrupt. 
  *     @arg DMA2_IT_TC1: DMA2 Channel1 transfer complete interrupt. 
  *     @arg DMA2_IT_HT1: DMA2 Channel1 half transfer interrupt. 
  *     @arg DMA2_IT_TE1: DMA2 Channel1 transfer error interrupt. 
  *     @arg DMA2_IT_GL2: DMA2 Channel2 global interrupt. 
  *     @arg DMA2_IT_TC2: DMA2 Channel2 transfer complete interrupt. 
  *     @arg DMA2_IT_HT2: DMA2 Channel2 half transfer interrupt. 
  *     @arg DMA2_IT_TE2: DMA2 Channel2 transfer error interrupt. 
  *     @arg DMA2_IT_GL3: DMA2 Channel3 global interrupt. 
  *     @arg DMA2_IT_TC3: DMA2 Channel3 transfer complete interrupt. 
  *     @arg DMA2_IT_HT3: DMA2 Channel3 half transfer interrupt. 
  *     @arg DMA2_IT_TE3: DMA2 Channel3 transfer error interrupt. 
  *     @arg DMA2_IT_GL4: DMA2 Channel4 global interrupt. 
  *     @arg DMA2_IT_TC4: DMA2 Channel4 transfer complete interrupt. 
  *     @arg DMA2_IT_HT4: DMA2 Channel4 half transfer interrupt. 
  *     @arg DMA2_IT_TE4: DMA2 Channel4 transfer error interrupt. 
  *     @arg DMA2_IT_GL5: DMA2 Channel5 global interrupt. 
  *     @arg DMA2_IT_TC5: DMA2 Channel5 transfer complete interrupt. 
  *     @arg DMA2_IT_HT5: DMA2 Channel5 half transfer interrupt. 
  *     @arg DMA2_IT_TE5: DMA2 Channel5 transfer error interrupt. 
  * @retval None 
  */ 
void DMA_ClearITPendingBit(uint32_t DMA_IT) 
{ 
  /* Check the parameters */ 
  assert_param(IS_DMA_CLEAR_IT(DMA_IT)); 
 
  /* Calculate the used DMA */ 
  if ((DMA_IT & FLAG_Mask) != (uint32_t)RESET) 
  { 
    /* Clear the selected DMA interrupt pending bits */ 
    DMA2->IFCR = DMA_IT; 
  } 
  else 
  { 
    /* Clear the selected DMA interrupt pending bits */ 
    DMA1->IFCR = DMA_IT; 
  } 
} 
 
/** 
  * @} 
  */ 
 
/** 
  * @} 
  */ 
 
/** 
  * @} 
  */ 
 
/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/