spi主机中断接收

zhoutong

主机：
u8 rxdata=0;

void USART1_INIT(void)
{
GPIO_InitTypeDef  GPIO_InitStructure; 
USART_InitTypeDef USART_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);  
USART_DeInit(USART1);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //
GPIO_Init(GPIOA,&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //
GPIO_Init(GPIOA,&GPIO_InitStructure);
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl =USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
USART_Init(USART1,&USART_InitStructure);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
USART_ITConfig(USART1, USART_IT_TXE, ENABLE);
USART_Cmd(USART1,ENABLE);
}

void SPI1_Init(void)
{
SPI_InitTypeDef  SPI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;  
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA|RCC_APB2Periph_SPI1, ENABLE );
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //???????ì????
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
  GPIO_SetBits(GPIOA,GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7);
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;  //?è??SPI???ò?ò?????ò??????????:SPI?è???????????ò?????¤
SPI_InitStructure.SPI_Mode = SPI_Mode_Master; // Slave; //?è??SPI?¤×÷????:?è?????÷SPI
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; //?è??SPI???????ó??:SPI·???????8?????á??
SPI_InitStructure.SPI_CPOL = SPI_CPOL_High; //???????®???±????????:?±???ü????
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge; //?????????????????±????
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; //NSS???????????¨NSS?????©?????í???¨????SSI???©???í:????NSS??????SSI??????
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256; //?¨???¨?????¤·???????:?¨?????¤·???????256
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //???¨??????????MSB??????LSB??????:??????????MSB??????
SPI_InitStructure.SPI_CRCPolynomial = 7; //CRC?????????à????
SPI_Init(SPI1, &SPI_InitStructure);  //?ù??SPI_InitStruct?????¨???????????????èSPIx?????÷ 
  SPI_I2S_ITConfig(SPI1, SPI_I2S_IT_RXNE, ENABLE);
SPI_Cmd(SPI1, ENABLE); //????SPI???è
//SPI1_ReadWriteByte(0xaa);//????????  
}   
//SPIx ????????×???
//TxData:????????×???
//·?????:????????×???
u8 SPI1_ReadWriteByte(u8 TxData)
{
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET); //?ì?é???¨??SPI±ê?????è????·?:·?????????±ê????
SPI_I2S_SendData(SPI1, TxData); //?¨?????èSPIx·???????????

while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);//?ì?é???¨??SPI±ê?????è????·?:????????·???±ê????
return SPI_I2S_ReceiveData(SPI1); //·????¨??SPIx×??ü??????????    
}

void NVIC_Config(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
  NVIC_InitStructure.NVIC_IRQChannel = SPI1_IRQn; //Channel
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}

void SPI1_IRQHandler(void)
{
if(SPI_I2S_GetITStatus(SPI1, SPI_I2S_IT_RXNE)==SET)
{
rxdata=SPI_I2S_ReceiveData(SPI1);
USART_SendData(USART1,rxdata);
}
}

int main(void)
{
SPI1_Init();
USART1_INIT();
NVIC_Config();
SPI1_ReadWriteByte(0xff);
while(1);
}

从机：
SPI_InitTypeDef  SPI_InitStructure;
u8 SPI1_ReadWriteByte(u8 TxData);

void SPI1_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
  
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA|RCC_APB2Periph_SPI1, ENABLE );
 
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //???????ì????
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);

  GPIO_SetBits(GPIOA,GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7);

SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;  //?è??SPI???ò?ò?????ò??????????:SPI?è???????????ò?????¤
SPI_InitStructure.SPI_Mode = SPI_Mode_Slave; //Master; // //?è??SPI?¤×÷????:?è?????÷SPI
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; //?è??SPI???????ó??:SPI·???????8?????á??
SPI_InitStructure.SPI_CPOL = SPI_CPOL_High; //???????®???±????????:?±???ü????
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge; //?????????????????±????
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; //NSS???????????¨NSS?????©?????í???¨????SSI???©???í:????NSS??????SSI??????
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256; //?¨???¨?????¤·???????:?¨?????¤·???????256
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //???¨??????????MSB??????LSB??????:??????????MSB??????
SPI_InitStructure.SPI_CRCPolynomial = 7; //CRC?????????à????
SPI_Init(SPI1, &SPI_InitStructure);  //?ù??SPI_InitStruct?????¨???????????????èSPIx?????÷
SPI_Cmd(SPI1, ENABLE); //????SPI???è
//SPI1_ReadWriteByte(0xff);//????????  
}   
//SPIx ????????×???
//TxData:????????×???
//·?????:????????×???
u8 SPI1_ReadWriteByte(u8 TxData)
{
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET); //?ì?é???¨??SPI±ê?????è????·?:·?????????±ê????
SPI_I2S_SendData(SPI1, TxData); //?¨?????èSPIx·???????????

while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);//?ì?é???¨??SPI±ê?????è????·?:????????·???±ê????
return SPI_I2S_ReceiveData(SPI1); //·????¨??SPIx×??ü??????????    
}

void SPI1_WriteByte(u8 TxData)
{
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET); //?ì?é???¨??SPI±ê?????è????·?:·?????????±ê????
SPI_I2S_SendData(SPI1, TxData); //?¨?????èSPIx·???????????
}

int main()
{
u8 i=0;
u8 Txdata[10]={0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0A};
SPI1_Init();
  while(i<10)
{
SPI1_WriteByte(Txdata[i++]);
}
while(1);
}


从机发送一个数组，主机中断接收，并且通过发到串口1通过串口调试助手显示出来。但是怎么调都出不来结果，请前辈指点！

正点原子

帮顶....

张鋆

NSS引脚初始化了吗