请问有谁调试成功过CY8C21434 SPIM 模块的读操作

2万 · 2013-7-29 21:49

2万 · 2013-7-29 21:51

你遇到什么问题了

2万 · 2013-7-29 21:54

可以向SPI从设备写操作，但是死活都不能进行读操作

只看该作者 · 2013-7-29 21:59

看看程序吧

2万 · 2013-7-29 22:01

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;
}