- uint32_t CS5532ReadData(void)//向CS5532读寄存器中的数据
- {
- uint8_t u8i;
- uint32_t u32ReadValue = 0;
- ClrBit_CSCLK();//时钟拉低
- ClrBit_SDO();
- ClrBit_SDI();
- for(u8i = 0;u8i < 8;u8i++)//8个清串口时钟
- {
- DrvSYS_Delay(2);
- SetBit_CSCLK();//时钟拉高
- DrvSYS_Delay(2);
- ClrBit_CSCLK();//时钟拉低
- }
- ClrBit_CSCLK();//时钟拉低
- DrvSYS_Delay(2);
- for(u8i = 0;u8i < 32; u8i++)
- {
- if(Get_SDO_Bit() == 1) //假如读取的是高电平
- {
- u32ReadValue|=0x00000001; //把高电平给了最低位，因为MSB优先
- }
- DrvSYS_Delay(2);
- SetBit_CSCLK();//时钟拉高
- DrvSYS_Delay(2);
- ClrBit_CSCLK();//时钟拉低
- if(u8i < 31)//最后一次应该不移位才对
- {
- u32ReadValue<<=1;//
- }
- }
- ClrBit_CSCLK();//时钟拉低
- SetBit_SDO();//
- DrvSYS_Delay(2);
- ClrBit_SDO();//
- return u32ReadValue>>11;
- }
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