STM8 SPI通讯程序

传送

while(1)

{

a=0b10101010

SPI_CR2 = 0b00000011//0X03

SPI_CR1 = 0b01001100//0X4C //8MHZ(HSE = 16MHZ)

while(1)

{

//while(!TXE)

for(sendCnt=0sendCnt<8sendCnt++)

{

while((SPI_SR&0b00000010)==0b00000010)

SPI_DR = 0xAA

if((SPI_SR&0b00000001)==0b00000001)

{

b=SPI_DR

}

else

{

//error flag

}

}

SPI_NSS=1

delay(40000)

SPI_NSS=0

while((SPI_SR&0b00000010)==0b00000010)

SPI_DR = 0xAA

}

}

接收罩枝

SPI_CR2 = 0b00000000//0X03

SPI_CR1 = 0b00011000//0X4C //8MHZ(HSE = 16MHZ)

RXIE=1

EI()

SPE=1

sentPoint=sentArray

receivePoint=receiveArray

//a=SPI_DR

//a=0

SPI_DR=*sentPoint

while(!TXE){}//è·±￡2??ù·￠?í?D

a=SPI_DR

a=0

sentPoint++

SPI_DR=*sentPoint

while(1)

{

if(PEI_5==1)/物并敏/如果有错误发蔽凳生

{

if(receiveCnt!=0)

{

SPE=1

sentPoint=sentArray

receivePoint=receiveArray

SPI_DR=*sentPoint

while(!TXE){}//è·±￡2??ù·￠?í?D

a=SPI_DR

a=0

sentPoint++

SPI_DR=*sentPoint

receiveCnt=0

}

}

I/O口自己设一下

首先说明一点：你这个里面都没有使能时钟，怎么可能会正常运行呢。

还有一点：STM32先等待已发送的数据是否发送完成，如果没有发送完成，并且进入循世锋环的话，说明数据发送错误，所以你这个地方顺序也有问题。应该是：

while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET)//检查指定的SPI标志位设如梁置与否:发送缓存空标志位

SPI_I2S_SendData(SPI1, 0x54)/渣返运/通过外设SPI1发送一个数据

printf("\n\r 数据发送完毕。\n\r")

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