有谁调试成功过CY8C21434 SPIM 模块的读操作

2万 · 2014-7-7 21:52

2万 · 2014-7-7 21:53

什么问题啊？

2万 · 2014-7-7 21:54

我可以向SPI从设备写操作，但是死活都不能进行读操作

2万 · 2014-7-7 21:57

代码看看

2万 · 2014-7-7 21:58

请高手指点：
void SPI_Write(unsigned char dig)
{
PRT2DR |= CS;
while(!(SPIM_1_bReadStatus() & SPIM_1_SPIM_TX_BUFFER_EMPTY)){};
PRT2DR &= ~CS;  // set slave select low
SPIM_1_SendTxData(dig); // set message to transmit
while(!(SPIM_1_bReadStatus() & SPIM_1_SPIM_SPI_COMPLETE)){};
PRT2DR |= CS; //
}

unsigned char SPI_Read(void)
{
unsigned char ReceivedData;

PRT2DR |= CS;

PRT2DR &= ~CS;
SPIM_1_SendTxData(0x00);  // 写伪数据，以便读到数据
while(!(SPIM_1_bReadStatus() &  SPIM_1_SPIM_RX_BUFFER_FULL));//RX Buffer register has received current data
ReceivedData = SPIM_1_bReadRxData();
PRT2DR |= CS;

return ReceivedData;
}