芯片是STM32F030C8T6，代码是根据F103可以通讯的代码移植过来的，接线也没有问题，但是寄存器就是没有数据，希望大神帮忙看看是哪里有什么问题吗？谢谢大家！

```SPI1（主机模式）初始化代码：

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);
}
```

主机发送数据代码：

```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（从机模式）初始化代码：
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);
}

从机中断函数：

```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);
}
        SPI_I2S_ClearFlag(SPI2, SPI_I2S_IT_RXNE);
        //SPI_I2S_ClearITPendingBit(SPI1, SPI_I2S_IT_RXNE);
}
}
```

主函数：

```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);
}
}
}
```

测试通讯最好用逻辑分析仪看看，否则很容易因为硬件问题导致分析出现错误。另外spi收发是分离的这样用逻辑分析仪可能更好分析一些。

F0 标准外设库里有SPI 例程，可以参考对照一下。stm32f0_stdperiph_libv1.5\STM32F0xx_StdPeriph_Lib_V1.5.0\Projects\STM32F0xx_StdPeriph_Examples\SPI\SPI_TwoBoards\DataExchangeInterrupt


另外标准库的方式已经落伍了，而且厂家也不更新维护了，尽快使用CUBE库吧。

用起来省事，移植方便，例程相当多~~~

butterflyspring 发表于 2023-10-30 15:58
F0 标准外设库里有SPI 例程，可以参考对照一下。stm32f0_stdperiph_libv1.5\STM32F0xx_StdPeriph_Lib_V1.5. ...

我去看看，谢谢！