/*******************************************************************************
* 函数名称: SPI_I2S_GetITStatus
* 功能描述: SPI_IT:检查指定的的SPI/I2S中断是否发生了。
* 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) SPI_I2S_IT:检查的指定的SPI/I2S中断源。
* 这个参数可以是下面的值之一:
* - SPI_I2S_IT_TXE: 传输缓冲为空中断
* - SPI_I2S_IT_RXNE: 接收缓冲不空中断
* - SPI_I2S_IT_OVR: 溢出中断.
* - SPI_IT_MODF: 模式错误中断
* - SPI_IT_CRCERR: CRC校验错误中断.
* - I2S_IT_UDR: 空栈读错误中断.
* 输出参数: 无
* 返回参数: SPI_I2S_IT的新状态 (SET or RESET).
*******************************************************************************/
ITStatus SPI_I2S_GetITStatus(SPI_TypeDef* SPIx, u8 SPI_I2S_IT)
{
ITStatus bitstatus = RESET;
u16 itpos = 0, itmask = 0, enablestatus = 0;
/* Check the parameters [检查参数]*/
assert_param(IS_SPI_ALL_PERIPH(SPIx));
assert_param(IS_SPI_I2S_GET_IT(SPI_I2S_IT));
/* Get the SPI/I2S IT index [取得SPI/I2S IT引索]*/
itpos = (u16)((u16)0x01 << (SPI_I2S_IT & (u8)0x0F));
/* Get the SPI/I2S IT mask [取得SPI/I2S IT标志]*/
itmask = SPI_I2S_IT >> 4;
/* Set the IT mask [置位IT标志]*/
itmask = (u16)((u16)0x01 << itmask);
/* Get the SPI_I2S_IT enable bit status [取得SPI_I2S_IT使能状态位]*/
enablestatus = (SPIx->CR2 & itmask) ;
/* Check the status of the specified SPI/I2S interrupt [检查指定的SPI/I2S中断状态]*/
if (((SPIx->SR & itpos) != (u16)RESET) && enablestatus)
{
/* SPI_I2S_IT is set [置位SPI_I2S_IT]*/
bitstatus = SET;
}
else
{
/* SPI_I2S_IT is reset [复位SPI_I2S_IT]*/
bitstatus = RESET;
}
/* Return the SPI_I2S_IT status [返回SPI_I2S_IT状态]*/
return bitstatus;
}
/**
* @brief Checks whether the specified SPI/I2S interrupt has occurred 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_IT: specifies the SPI interrupt source to check.
* This parameter can be one of the following values:
* @arg SPI_I2S_IT_TXE: Transmit buffer empty interrupt.
* @arg SPI_I2S_IT_RXNE: Receive buffer not empty interrupt.
* @arg SPI_IT_MODF: Mode Fault interrupt.
* @arg SPI_I2S_IT_OVR: Overrun interrupt.
* @arg I2S_IT_UDR: Underrun interrupt.
* @arg SPI_I2S_IT_FRE: Format Error interrupt.
* @retval The new state of SPI_I2S_IT (SET or RESET).
*/
ITStatus SPI_I2S_GetITStatus(SPI_TypeDef* SPIx, uint8_t SPI_I2S_IT)
{
ITStatus bitstatus = RESET;
uint16_t itpos = 0, itmask = 0, enablestatus = 0;
/* Check the parameters */
assert_param(IS_SPI_ALL_PERIPH(SPIx));
assert_param(IS_SPI_I2S_GET_IT(SPI_I2S_IT));
/* Get the SPI_I2S_IT index */
itpos = 0x01 << (SPI_I2S_IT & 0x0F);
/* Get the SPI_I2S_IT IT mask */
itmask = SPI_I2S_IT >> 4;
/* Set the IT mask */
itmask = 0x01 << itmask;
/* Get the SPI_I2S_IT enable bit status */
enablestatus = (SPIx->CR2 & itmask) ;
/* Check the status of the specified SPI interrupt */
if (((SPIx->SR & itpos) != (uint16_t)RESET) && enablestatus)
{
/* SPI_I2S_IT is set */
bitstatus = SET;
}
else
{
/* SPI_I2S_IT is reset */
bitstatus = RESET;
}
/* Return the SPI_I2S_IT status */
return bitstatus;
}