C++ (Cpp) HAL_UART_DMA_GET_RX_BYTE 예제들

예제 #1

파일: _hal_uart_dma.c 프로젝트: ClarePhang/CC2540

/*****************************************************************************
 * @fn      HalUARTReadDMA
 *
 * @brief   Read a buffer from the UART
 *
 * @param   buf  - valid data buffer at least 'len' bytes in size
 *          len  - max length number of bytes to copy to 'buf'
 *
 * @return  length of buffer that was read
 *****************************************************************************/
static uint16 HalUARTReadDMA(uint8 *buf, uint16 len)
{
  uint16 cnt;

  for (cnt = 0; cnt < len; cnt++)
  {
    if (!HAL_UART_DMA_NEW_RX_BYTE(dmaCfg.rxHead))
    {
      break;
    }
    *buf++ = HAL_UART_DMA_GET_RX_BYTE(dmaCfg.rxHead);
    HAL_UART_DMA_CLR_RX_BYTE(dmaCfg.rxHead);
    HAL_UART_RX_IDX_T_INCR(dmaCfg.rxHead);
  }

  if (!DMA_PM && (UxUCR & UCR_FLOW))
  {
    if (HalUARTRxAvailDMA() < HAL_UART_DMA_HIGH)
    {
      HAL_UART_DMA_SET_RDY_OUT();  // Re-enable the flow asap (i.e. not wait until next uart poll).
    }
  }

  return cnt;
}

예제 #2

파일: _hal_uart_dma.c 프로젝트: fanqh/vitness

/*****************************************************************************
 * @fn      HalUARTReadDMA
 *
 * @brief   Read a buffer from the UART
 *
 * @param   buf  - valid data buffer at least 'len' bytes in size
 *          len  - max length number of bytes to copy to 'buf'
 *
 * @return  length of buffer that was read
 *****************************************************************************/
static uint16 HalUARTReadDMA(uint8 *buf, uint16 len)
{
  uint16 cnt;

  for (cnt = 0; cnt < len; cnt++)
  {
    if (!HAL_UART_DMA_NEW_RX_BYTE(dmaCfg.rxHead))
    {
      break;
    }
    *buf++ = HAL_UART_DMA_GET_RX_BYTE(dmaCfg.rxHead);
    HAL_UART_DMA_CLR_RX_BYTE(dmaCfg.rxHead);
    HAL_UART_RX_IDX_T_INCR(dmaCfg.rxHead);
  }

  /* Update pointers after reading the bytes */
  dmaCfg.rxTail = dmaCfg.rxHead;

  if (!DMA_PM && (UxUCR & UCR_FLOW))
  {
    HAL_UART_DMA_SET_RDY_OUT();  // Re-enable the flow asap (i.e. not wait until next uart poll).    
  }

  return cnt;
}

예제 #3

파일: _hal_uart_dma.c 프로젝트: lincomatic/ZigBee_OpenEVSE

/*****************************************************************************
 * @fn      HalUARTReadDMA
 *
 * @brief   Read a buffer from the UART
 *
 * @param   buf  - valid data buffer at least 'len' bytes in size
 *          len  - max length number of bytes to copy to 'buf'
 *
 * @return  length of buffer that was read
 *****************************************************************************/
static uint16 HalUARTReadDMA(uint8 *buf, uint16 len)
{
  uint16 cnt;

  for (cnt = 0; cnt < len; cnt++)
  {
    if (!HAL_UART_DMA_NEW_RX_BYTE(dmaCfg.rxHead))
    {
      break;
    }
    *buf++ = HAL_UART_DMA_GET_RX_BYTE(dmaCfg.rxHead);
    HAL_UART_DMA_CLR_RX_BYTE(dmaCfg.rxHead);
#if HAL_UART_DMA_RX_MAX == 256
    (dmaCfg.rxHead)++;
#else
    if (++(dmaCfg.rxHead) >= HAL_UART_DMA_RX_MAX)
    {
      dmaCfg.rxHead = 0;
    }
#endif
  }
  PxOUT &= ~HAL_UART_Px_RTS;  // Re-enable the flow on any read.

  return cnt;
}