/**
* @brief SPI 波特率及传输控制寄存器配置
* @param[in] instance 芯片SPI端口
* @arg HW_SPI0 芯片的SPI0端口
* @arg HW_SPI1 芯片的SPI1端口
* @arg HW_SPI2 芯片的SPI2端口
* @param[in] ctar SPI通信通道选择
* @arg HW_CTAR0 0配置寄存器
* @arg HW_CTAR1 1配置寄存器
* @param[in] frameFormat SPI通信时的相位和极性的关系
* @arg kSPI_CPOL0_CPHA0
* @arg kSPI_CPOL1_CPHA0
* @arg kSPI_CPOL0_CPHA1
* @arg kSPI_CPOL1_CPHA1
* \param[in] dataSize 数据大小
* \param[in] bitOrder LSB First
* \arg 0 Data is transferred MSB first
* \arg 1 Data is transferred LSB first
* @param[in] baudrate SPI通信速度设置
* @return None
*/
void SPI_CTARConfig(uint32_t instance, uint32_t ctar, SPI_FrameFormat_Type frameFormat, uint8_t dataSize, uint8_t bitOrder, uint32_t baudrate)
{
SPI_Type *SPIx;
uint32_t clock;
SPIx = SPI_InstanceTable[instance];
/* data size */
SPIx->CTAR[ctar] &= ~SPI_CTAR_FMSZ_MASK;
SPIx->CTAR[ctar] |= SPI_CTAR_FMSZ(dataSize-1);
/* bit order */
switch(bitOrder)
{
case kSPI_MSB:
SPIx->CTAR[ctar] &= ~SPI_CTAR_LSBFE_MASK;
break;
case kSPI_LSB:
SPIx->CTAR[ctar] |= SPI_CTAR_LSBFE_MASK;
break;
default:
break;
}
/* frame format */
switch(frameFormat)
{
case kSPI_CPOL0_CPHA0:
SPIx->CTAR[ctar] &= ~SPI_CTAR_CPOL_MASK;
SPIx->CTAR[ctar] &= ~SPI_CTAR_CPHA_MASK;
break;
case kSPI_CPOL0_CPHA1:
SPIx->CTAR[ctar] &= ~SPI_CTAR_CPOL_MASK;
SPIx->CTAR[ctar] |= SPI_CTAR_CPHA_MASK;
break;
case kSPI_CPOL1_CPHA0:
SPIx->CTAR[ctar] |= SPI_CTAR_CPOL_MASK;
SPIx->CTAR[ctar] &= ~SPI_CTAR_CPHA_MASK;
break;
case kSPI_CPOL1_CPHA1:
SPIx->CTAR[ctar] |= SPI_CTAR_CPOL_MASK;
SPIx->CTAR[ctar] |= SPI_CTAR_CPHA_MASK;
break;
default:
break;
}
/* set SPI clock, SPI use Busclock */
clock = GetClock(kBusClock);
dspi_hal_set_baud(instance, ctar, baudrate, clock);
/* add more CS time */
SPIx->CTAR[ctar] |= SPI_CTAR_ASC(1)|SPI_CTAR_CSSCK(1)|SPI_CTAR_PASC(1)|SPI_CTAR_PCSSCK(1);
}
/**
* @brief SPI数据帧配置
* @note 内部函数，用户无需调用
* @retval None
*/
void SPI_FrameConfig(uint32_t instance, uint32_t ctar, SPI_FrameFormat_Type frameFormat, uint8_t dataSize, uint8_t bitOrder, uint32_t baudrate)
{
uint32_t clock;
/* data size */
SPI_InstanceTable[instance]->CTAR[ctar] &= ~SPI_CTAR_FMSZ_MASK;
SPI_InstanceTable[instance]->CTAR[ctar] |= SPI_CTAR_FMSZ(dataSize-1);
/* bit order */
switch(bitOrder)
{
case kSPI_MSBFirst:
SPI_InstanceTable[instance]->CTAR[ctar] &= ~SPI_CTAR_LSBFE_MASK;
break;
case kSPI_LSBFirst:
SPI_InstanceTable[instance]->CTAR[ctar] |= SPI_CTAR_LSBFE_MASK;
break;
default:
break;
}
/* frame format */
switch(frameFormat)
{
case kSPI_CPOL0_CPHA0:
SPI_InstanceTable[instance]->CTAR[ctar] &= ~SPI_CTAR_CPOL_MASK;
SPI_InstanceTable[instance]->CTAR[ctar] &= ~SPI_CTAR_CPHA_MASK;
break;
case kSPI_CPOL0_CPHA1:
SPI_InstanceTable[instance]->CTAR[ctar] &= ~SPI_CTAR_CPOL_MASK;
SPI_InstanceTable[instance]->CTAR[ctar] |= SPI_CTAR_CPHA_MASK;
break;
case kSPI_CPOL1_CPHA0:
SPI_InstanceTable[instance]->CTAR[ctar] |= SPI_CTAR_CPOL_MASK;
SPI_InstanceTable[instance]->CTAR[ctar] &= ~SPI_CTAR_CPHA_MASK;
break;
case kSPI_CPOL1_CPHA1:
SPI_InstanceTable[instance]->CTAR[ctar] |= SPI_CTAR_CPOL_MASK;
SPI_InstanceTable[instance]->CTAR[ctar] |= SPI_CTAR_CPHA_MASK;
break;
default:
break;
}
/* set SPI clock, SPI use Busclock */
CLOCK_GetClockFrequency(kBusClock, &clock);
dspi_hal_set_baud(instance, ctar, baudrate, clock);
}
void spi_frequency(spi_t *obj, int hz) {
uint32_t busClock;
clock_manager_get_frequency(kBusClock, &busClock);
dspi_hal_set_baud(obj->instance, kDspiCtar0, (uint32_t)hz, busClock);
}
