Other Parts Discussed in Thread: ADS1298
您好，我在用8051驱动ADS1298时遇到了个问题，上电配置后，测量VREFP引脚为2.4V 且VCAP1也大于1.1V，但是在发送START命令或拉高START引脚后，DRDY始终为低电平，下面是我的代码及寄存器配置，请问是什么原因导致的，我的SCLK速率为2.5M，这个芯片是可以正常工作的，我可以用FPGA正常驱动它
char WAKEUP =0x02;
char SDATAC =0x11;
char STANDBY =0x04;
char RESET =0x06;
char START =0x08;
char STOP =0x0a;
char RDATAC =0x10;
char RDATA =0x12;
char RREG =0x20;
char RREG_NUM =0x04;
char WREG =0x41; //从01h开始写
char WREG_NUM =0x0b; //写12个寄存器
char CONFIG1 =0x05; //低功耗 500SPS
char CONFIG2 =0x12; //12 不测试 10 测试
char CONFIG3 =0xC8;
char LOFF =0x00;
char CH1SET =0x00;
char CH2SET =0x91;
char CH3SET =0x91;
char CH4SET =0x00;
char CH5SET =0x91;
char CH6SET =0x91;
char CH7SET =0x91;
char CH8SET =0x00;
//ADS1298上电
ADS1298_Init();// PWDN = 1；START = 0；
//延时，上电稳定
Delay1000ms(); //PWDN = 1 后，延时Tpor待上电稳定
//配置ADS1298
UART2_SendString("开始配置ADS1298");
SS = 0; //拉低CS，开启传输
SPI_Write(RESET);
Delay8us(); //需要等待至少18个Sclk，2.5MHz，T(18clk)=7.2us
SPI_Write(SDATAC);
SPI_Write(WREG);
SPI_Write(WREG_NUM); //写12个寄存器
SPI_Write(CONFIG1);
SPI_Write(CONFIG2);
SPI_Write(CONFIG3);
SPI_Write(LOFF);
SPI_Write(CH1SET);
SPI_Write(CH2SET);
SPI_Write(CH3SET);
SPI_Write(CH4SET);
SPI_Write(CH5SET);
SPI_Write(CH6SET);
SPI_Write(CH7SET);
SPI_Write(CH8SET);
SPI_Write(START);
//START_pin = 1;
Delay8us();
SPI_Write(RDATAC); //连续读指令
Delay8us();
SS = 1;
