【转】spi测试自发自收（中断通信方式）

1 void spiRccinit(void)
2 {  
3     RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
4 
5     RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
6 
7     RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
8 }

 1 void spiGPIOInit(void)
 2 {
 3     GPIO_InitTypeDef gpio_init;
 4     gpio_init.GPIO_Pin = GPIO_Pin_4; //片选
 5     gpio_init.GPIO_Speed = GPIO_Speed_50MHz;
 6     gpio_init.GPIO_Mode = GPIO_Mode_Out_PP;
 7     GPIO_Init(GPIOA, &gpio_init);
 8 
 9     gpio_init.GPIO_Pin = GPIO_Pin_5;  //时钟
10     gpio_init.GPIO_Mode = GPIO_Mode_AF_PP;
11     GPIO_Init(GPIOA, &gpio_init);
12 
13     gpio_init.GPIO_Pin = GPIO_Pin_7;  //MOSI 
14     GPIO_Init(GPIOA, &gpio_init);
15 
16     gpio_init.GPIO_Pin = GPIO_Pin_6;  //MISO
17     GPIO_Init(GPIOA, &gpio_init);
18 } 

 1 void spiConfigure(void)
 2 {
 3     SPI_InitTypeDef spi_Init;
 4     spi_Init.SPI_CPHA = SPI_CPHA_2Edge;
 5     spi_Init.SPI_CPOL = SPI_CPOL_Low;
 6     spi_Init.SPI_DataSize = SPI_DataSize_8b;
 7     spi_Init.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;
 8     spi_Init.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
 9     spi_Init.SPI_FirstBit = SPI_FirstBit_MSB;
10     spi_Init.SPI_Mode = SPI_Mode_Master;
11     spi_Init.SPI_NSS = SPI_NSS_Soft;
12     spi_Init.SPI_CRCPolynomial = 7;
13 
14     SPI_Init(SPI1, &spi_Init);  
15     SPI_I2S_ITConfig(SPI1,SPI_I2S_IT_RXNE,ENABLE); 
16     SPI_Cmd(SPI1,ENABLE);
17 } 

 1 void spiNivcConfiguration(void)
 2 {    
 3     NVIC_InitTypeDef nvic_init;     
 4 
 5     NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); 
 6     nvic_init.NVIC_IRQChannel = SPI1_IRQn;
 7     nvic_init.NVIC_IRQChannelPreemptionPriority = 2;
 8     nvic_init.NVIC_IRQChannelSubPriority = 1;
 9     nvic_init.NVIC_IRQChannelCmd = ENABLE;
10 
11     NVIC_Init(&nvic_init);
12 } 

 1 void SPI1_IRQHandler(void)
 2 {
 3     if(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) != RESET)
 4     {
 5         if(send[++sendCount] != ‘\0‘)
 6         {
 7             SPI_I2S_SendData(SPI1, send[sendCount]);
 8         }
 9         else 
10         {      
11             SPI_I2S_ITConfig(SPI1,SPI_I2S_IT_TXE, DISABLE);
12         }
13     }
14     if(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) != RESET)
15     {
16         recv[recvCount] = SPI_I2S_ReceiveData(SPI1);
17         if(recv[recvCount] == ‘*‘)
18         {
19             recv[recvCount + 1] = ‘\0‘;
20             printf("recv data: %s\r\n", recv);
21             recvCount = 0;
22         }
23         else 
24         {
25             recvCount++;                
26             if(recvCount == 1023)
27　　　　　　　　{
28                 recvCount = 0;
29             }
30         }
31     }
32 }            

1 u8 recv[1024] = {‘\0‘};
2 u8 send[1024] = {‘\0‘};
3 volatile u16 recvCount = 0;
4 volatile u16 sendCount = 0;

 1 void spiWrite(const char *p)
 2 {
 3     strcpy(send, p);
 4     sendCount = 0;
 5 //  while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
 6     SPI_I2S_SendData(SPI1, send[sendCount]);
 7     SPI_I2S_ITConfig(SPI1,SPI_I2S_IT_TXE, ENABLE);
 8 //  while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
 9 //  recv[0] = SPI_I2S_ReceiveData(SPI1);
10 //  recv[1] = ‘\0‘;
11 //  printf("recv ok! ");
12 //  printf(recv);
13 }