SPI的实验读W25X16 ID不正确

zhihuo · 发表于 2013-10-20 20:43:11

自己写的SPI实验读W25X16 ID不正确

然后用原子的例子实验也不正确

读出来的ID都是65535 也就是2次读出来都是FF

这是我自己的代码
u16 SPI_W25X16_Read_ID(void)
{
    u16 Temp = 0;
    SPI_W25X16_CS = 0;
//     SPIx_ReadWriteByte(SPI1, 0x90);    //发送ID命令
//     SPIx_ReadWriteByte(SPI1, 0x00);
//     SPIx_ReadWriteByte(SPI1, 0x00);
//     SPIx_ReadWriteByte(SPI1, 0x00);
//     Temp|=SPIx_ReadWriteByte(SPI1, 0xFF)<<8;
//     Temp|=SPIx_ReadWriteByte(SPI1, 0xFF);
    printf("==============================================");
    printf("%d\n",SPIx_ReadWriteByte(SPI1, 0x90));
    printf("%d\n",SPIx_ReadWriteByte(SPI1, 0x00));
    printf("%d\n",SPIx_ReadWriteByte(SPI1, 0x00));
    printf("%d\n",SPIx_ReadWriteByte(SPI1, 0x00));
    printf("%d\n",Temp|=SPIx_ReadWriteByte(SPI1, 0xFF)<<8);
    printf("%d\n",Temp|=SPIx_ReadWriteByte(SPI1, 0xFF));
    printf("==============================================");

    SPI_W25X16_CS = 1;
    return Temp;
}