/**
* @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;
}
/*******************************************************************************
* 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;
}