论坛 › 问答 › 求助: stm32F030C8T6 SPI从机通讯收到全0

zhenfanhei 发表于 2015-11-17 15:14:18

求助: stm32F030C8T6 SPI从机通讯收到全0

各路英雄好，我全用stm32f030c8t6不久，现需要它只接收arm9的spi数据即可，arm9这边的是用了很多年的系统，使用spi   400Khz   CPOL=0, CPHA=0的方式往外发近100字节的连续数据。使用逻辑分析仪抓的波形比较好，但现在我使用c8t6的SPI2做从机， 中断中收到后打印的全是0， 希望有经验的GGJJ指点一下，在此谢过了!!如下为初始化代码，是参考的官方例程STM32F0xx_StdPeriph_Lib_V1.3.1\Projects\STM32F0xx_StdPeriph_Examples\SPI\SPI_TwoBoards\DataExchangeInterrupt这里面的代码，而且我再三确认过ARM9 CS--> 030 CSARM9 MOSI---> 030 MOSIARM9 sck ---> 030 SCK


static void SPI2_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

/* Enable the SPI periph */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);

/* Enable SCK, MOSI, MISO and NSS GPIO clocks */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);

GPIO_PinAFConfig(GPIOB, GPIO_PinSource12, GPIO_AF_0);   
GPIO_PinAFConfig(GPIOB, GPIO_PinSource13, GPIO_AF_0);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_0);
//GPIO_PinAFConfig(RCC_AHBPeriph_GPIOA, SPIx_MISO_SOURCE, SPIx_MISO_AF);

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;

/* SPICS pin configuration */   
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_Init(GPIOB, &GPIO_InitStructure);

/* SPI SCK pin configuration */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
GPIO_Init(GPIOB, &GPIO_InitStructure);

/* SPIMOSI pin configuration */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
GPIO_Init(GPIOB, &GPIO_InitStructure);

/* SPIMISO ---> A0 Input GPIO configuration */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;
GPIO_Init(GPIOB, &GPIO_InitStructure);

RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, ENABLE);
RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, DISABLE);

/* SPI configuration -------------------------------------------------------*/
SPI_I2S_DeInit(SPI2);
//SPI_Cmd(SPI2, DISABLE);

SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;//SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_32;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI2, &SPI_InitStructure);

/* Configure the SPI interrupt priority */
NVIC_InitStructure.NVIC_IRQChannel = SPI2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

/* Initialize the FIFO threshold */
SPI_RxFIFOThresholdConfig(SPI2, SPI_RxFIFOThreshold_QF);

/* Enable the Rx buffer not empty interrupt */
SPI_I2S_ITConfig(SPI2, SPI_I2S_IT_RXNE, ENABLE);

/* Enable the SPI Error interrupt */
SPI_I2S_ITConfig(SPI2, SPI_I2S_IT_ERR, ENABLE);

/* Enable the SPI peripheral */
SPI_Cmd(SPI2, ENABLE);
}



void SPI2_IRQHandler(void)
{
//#if defined (SPI_SLAVE)
#if 1   
#if 0
/* SPI in Slave Tramitter mode--------------------------------------- */
if (SPI_I2S_GetITStatus(SPI2, SPI_I2S_IT_TXE) == SET)
{
    SPI_SendData8(SPI2, TxBuffer);
    if (Tx_Idx == GetVar_NbrOfData())
    {
      /* Disable the Tx buffer empty interrupt */
      SPI_I2S_ITConfig(SPI2, SPI_I2S_IT_TXE, DISABLE);
    }
}
#endif
/* SPI in Slave Receiver mode--------------------------------------- */
while(SPI_I2S_GetITStatus(SPI2, SPI_I2S_IT_RXNE) == SET)
{
      RxChr = SPI_ReceiveData8(SPI2);
      printf("%02x ", RxChr);
      RxBuffer = RxChr;
      if(Rx_Idx==64)
          Rx_Idx = 0;
}
#if 1
/* SPI Error interrupt--------------------------------------- */
if (SPI_I2S_GetITStatus(SPI2, SPI_I2S_IT_OVR) == SET)
{
    SPI_ReceiveData8(SPI2);
    SPI_I2S_GetITStatus(SPI2, SPI_I2S_IT_OVR);
    printf("OV ");   
}
#endif
#if 1
/* SPI Error interrupt--------------------------------------- */
if (SPI_I2S_GetITStatus(SPI2, SPI_I2S_IT_FRE) == SET)
{
    SPI_ReceiveData8(SPI2);
    SPI_I2S_GetITStatus(SPI2, SPI_I2S_IT_FRE);
    printf("FE ");
}
#endif   
#endif /* SPI_SLAVE*/




在线等待啊，

zhenfanhei 发表于 2015-11-17 15:21:30

附上spi波形，串口打印如下， 程序上电会打印Hello,world，所以打印是正确的，不用怀疑

安 发表于 2015-11-17 15:49:58

在中断中加断点，看一下RxChr的值是多少。

zhenfanhei 发表于 2015-11-17 15:50:29

啊，大侠们都去哪里了，过来瞧瞧啊

zhenfanhei 发表于 2015-11-17 16:09:14

嗯，查看过了 RxChr还真是0，本来是直接读到数组里面的，全0，读到字节变量里面，还是有问题

zhenfanhei 发表于 2015-11-17 16:51:02

版主，代码部分对不对？？

zhenfanhei 发表于 2015-11-17 16:55:42

再发2张寄存器的图：

peter001 发表于 2015-11-17 18:15:34

自发自收试一下

zhenfanhei 发表于 2015-11-17 18:48:56

结贴，嗯，代码绝对没问题，是硬件工程师搞错了线，感谢大伙

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