为什么我的AT25256读写不正确，请帮忙看下
//////////////////////////////////////
void SPI_WREN(void)
{
SPI_CS=0; //选中AT25256
Tx_SPI(0x06); //写允许，只有操作码
SPI_CS=1;
}
///////////////////////////////////
void SPI_WRDI(void)
{
SPI_CS=0; //选中AT25256
Tx_SPI(0x04); //写禁止，只有操作码
SPI_CS=1;
}
////////////////////////////////////
uchar SPI_RDSR(void)
{
uchar read_state; //读状态寄存器，操作码+一个字节
SPI_CS=0; //选中AT25256
Tx_SPI(0x05);
read_state=Rx_SPI();
SPI_CS=1;
return read_state;
}
////////////////////////////////////////////
void SPI_WRITE(uchar address_H,uchar address_L,write_data)
{
uchar state;
state=1;
SPI_WREN(); //开启写
SPI_CS=0; //选中AT25256
Tx_SPI(0x02); //写的指令
Tx_SPI(address_H);
Tx_SPI(address_L);
Tx_SPI(write_data);
SPI_CS=1;
while(state)//写等待
{state=SPI_RDSR();}
SPI_WRDI(); //禁止写
}
/////////////////////////////////
uchar SPI_READ(uchar address_H,uchar address_L)
{
uchar Rx_data;
//SPI_HOLD=1;
SPI_CS=0; //选中AT25256
Tx_SPI(0x03);
Tx_SPI(address_H);
Tx_SPI(address_L);
Rx_data=Rx_SPI();
SPI_CS=1;
return Rx_data;
}
////////////////////////////////////////// |
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