Example #1
0
/**
  * @brief  Checks whether the specified SPI flag is set or not.
  * @param  SPIx: where x can be 1 or 2 in SPI mode or 1 in I2S mode to select
  *   the SPI peripheral.
  * @param  SPI_I2S_FLAG: specifies the SPI flag to check.
  *   This parameter can be one of the following values:
  *     @arg SPI_I2S_FLAG_TXE: Transmit buffer empty flag.
  *     @arg SPI_I2S_FLAG_RXNE: Receive buffer not empty flag.
  *     @arg SPI_I2S_FLAG_BSY: Busy flag.
  *     @arg SPI_I2S_FLAG_OVR: Overrun flag.
  *     @arg SPI_I2S_FLAG_MODF: Mode Fault flag.
  *     @arg SPI_I2S_FLAG_CRCERR: CRC Error flag.
  *     @arg SPI_I2S_FLAG_FRE: TI frame format error flag.
  *     @arg I2S_FLAG_UDR: Underrun Error flag.
  *     @arg I2S_FLAG_CHSIDE: Channel Side flag.
  * @retval The new state of SPI_I2S_FLAG (SET or RESET).
  */
FlagStatus SPI_I2S_GetFlagStatus(SPI_TypeDef* SPIx, uint16_t SPI_I2S_FLAG)
{
    FlagStatus bitstatus = RESET;
    /* Check the parameters */
    assert_param(IS_SPI_ALL_PERIPH(SPIx));
    assert_param(IS_SPI_I2S_GET_FLAG(SPI_I2S_FLAG));

    /* Check the status of the specified SPI flag */
    if ((SPIx->SR & SPI_I2S_FLAG) != (uint16_t)RESET) {
        /* SPI_I2S_FLAG is set */
        bitstatus = SET;
    } else {
        /* SPI_I2S_FLAG is reset */
        bitstatus = RESET;
    }

    /* Return the SPI_I2S_FLAG status */
    return  bitstatus;
}
Example #2
0
/*******************************************************************************
* 函数名称: SPI_I2S_GetFlagStatus
* 功能描述: 检查指定的SPI/I2S标记是否被置位.
* 输入参数: (1)- SPIx: x可以是 :
*                         - 1, 2 或 3 在 SPI 模式 
*                         - 2 或 3 在 I2S 模式
*           (2)检查指定的SPI/I2S标记是否被设置. 
*                    这个参数可以是下面的值之一:
*                       - SPI_I2S_FLAG_TXE: 传输缓冲为空标记.
*                       - SPI_I2S_FLAG_RXNE: 接收缓冲不空标记.
*                       - SPI_I2S_FLAG_BSY: 忙碌标记.
*                       - SPI_I2S_FLAG_OVR: 溢出标记.
*                       - SPI_FLAG_MODF: 模式错误标记.
*                       - SPI_FLAG_CRCERR: CRC校验错误标记.
*                       - I2S_FLAG_UDR: 空栈读出错标记. 
*                       - I2S_FLAG_CHSIDE: 通道边标志.
* 输出参数: 无
* 返回参数: SPI_I2S_FLAG标记的新状态  (SET or RESET).
*******************************************************************************/
FlagStatus SPI_I2S_GetFlagStatus(SPI_TypeDef* SPIx, u16 SPI_I2S_FLAG)
{
  FlagStatus bitstatus = RESET;

  /* Check the parameters [检查参数]*/
  assert_param(IS_SPI_ALL_PERIPH(SPIx));
  assert_param(IS_SPI_I2S_GET_FLAG(SPI_I2S_FLAG));

  /* Check the status of the specified SPI/I2S flag [检查指定的SPI/I2S标志状态]*/
  if ((SPIx->SR & SPI_I2S_FLAG) != (u16)RESET)
  {
    /* SPI_I2S_FLAG is set [置位SPI_I2S_FLAG]*/
    bitstatus = SET;
  }
  else
  {
    /* SPI_I2S_FLAG is reset [复位SPI_I2S_FLAG]*/
    bitstatus = RESET;
  }
  /* Return the SPI_I2S_FLAG status [返回SPI_I2S_FLAG状态]*/
  return  bitstatus;
}