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SPI1£¨Ö÷»úģʽ£©³õʼ»¯´úÂ룺
void SPI1_Init(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOA, ENABLE);
// SPI_Cmd(SPI1, DISABLE);
SPI_InitTypeDef SPI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = SPI1_SCK_PIN | SPI1_MOSI_PIN | SPI1_MISO_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(SPI1_MISO_PORT, &GPIO_InitStructure);
GPIO_PinAFConfig(SPI1_SCK_PORT, SPI1_SCK_SOURCE, GPIO_AF_0);
GPIO_PinAFConfig(SPI1_MISO_PORT, SPI1_MISO_SOURCE, GPIO_AF_0);
GPIO_PinAFConfig(SPI1_MOSI_PORT, SPI1_MOSI_SOURCE, GPIO_AF_0);
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_Init(SPI1, &SPI_InitStructure);
SPI_RxFIFOThresholdConfig(SPI1, SPI_RxFIFOThreshold_QF);
SPI_Cmd(SPI1, ENABLE);
}
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uint8_t SPI1_WriteRead8Byte(uint8_t TxData)
{
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
SPI_SendData8(SPI1, TxData);
// *(uint8_t*)&SPI1->DR = TxData;
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
return SPI_ReceiveData8(SPI1);
}
SPI2£¨´Ó»úģʽ£©³õʼ»¯´úÂ룺
void SPI2_Init(void)
{
RCC_AHBPeriphResetCmd(RCC_AHBPeriph_GPIOB, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
GPIO_InitStructure.GPIO_Pin = SPI2_SCK_PIN | SPI2_MOSI_PIN | SPI2_MISO_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(SPI2_MISO_PORT, &GPIO_InitStructure);
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_Init(SPI2, &SPI_InitStructure);
SPI_RxFIFOThresholdConfig(SPI2, SPI_RxFIFOThreshold_QF);
SPI_Cmd(SPI2, ENABLE);
SPI_I2S_ITConfig(SPI2, SPI_I2S_IT_RXNE, ENABLE);
SPI_I2S_ITConfig(SPI2, SPI_I2S_IT_ERR, ENABLE);
NVIC_InitStructure.NVIC_IRQChannel = SPI2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
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void SPI2_IRQHandler(void)
{
if (SET == SPI_I2S_GetITStatus(SPI2, SPI_I2S_IT_RXNE))
{
ucSPI2_RxBuf[ucSPI2_RxCount] = *(uint8_t*)&SPI2->DR;
while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET)
;
*(uint8_t*)&SPI2->DR = ucSPI2_RxBuf[ucSPI2_RxCount] + 0x05;
ucSPI2_RxCount++;
if (ucSPI2_RxCount > SPI_BUF_LEN - 1)
{
ucSPI2_RxCount = 0;
}
SPI_I2S_ClearFlag(SPI2, SPI_I2S_IT_RXNE);
//SPI_I2S_ClearITPendingBit(SPI1, SPI_I2S_IT_RXNE);
}
}
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int main(void)
{
int i = 0;
System_Initializes();
while (1)
{
for (i = 0; i < SPI_BUF_LEN; i++)
{
ucSPI1_RxBuf[i] = SPI1_WriteRead8Byte(ucSPI1_TxBuf[i]);
Delay_ms(10);
}
}
}
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