ADS1211，AINN与AINP短接，输出为什么会是0x800001而不是0?,cmdreg 配置为TWO complement模式，读取cmdreg 也符合TWO complement模式

16:50:55.909 write INSR register 0x64

write ads1121 cmd reg value = 0x2238013

16:50:56.534 read cmd register value = 0x2038013, now should resume normal mode

read ocr reg value = 0x7d0000

read fscr reg value = 0xffffff

stAdcRingBuffer[0], writable_len = 32, readable_len = 0, write_idx = 0, read_idx = 0

stAdcRingBuffer[1], writable_len = 32, readable_len = 0, write_idx = 0, read_idx = 0

stAdcRingBuffer[2], writable_len = 32, readable_len = 0, write_idx = 0, read_idx = 0

stAdcRingBuffer[3], writable_len = 32, readable_len = 0, write_idx = 0, read_idx = 0

16:51:00.495 set extern vref on

get adc data:

0x800001 0x800001 0x800001 0x800001

0x800001 0x800001 0x800001 0x800001

16:51:00.900 get adc data:

0x803127 0x804188 0x800000 0x800000

0x800001 0x803127 0x800001 0x800830

16:51:01.307 get adc data:

0x800000 0x800000 0x800000 0x800001

0x801063 0x800001 0x800000 0x800000

16:51:01.716 get adc data:

0x800000 0x800000 0x801063 0x801063

0x800000 0x800000 0x800000 0x800001

16:51:02.119 get adc data:

0x800000 0x800001 0x800001 0x800000

0x801063 0x800000 0x801894 0x800000

16:51:02.492 get adc data:

0x800001 0x800000 0x801063 0x8028f7

0x801894 0x801063 0x800000 0x800001

get adc data:

0x801063 0x800001 0x801063 0x800000

0x800001 0x800000 0x800001 0x800000 

Amy Luo：

您好，
建议您在校准前先验证您的寄存器设置，即分两步进行，先配置验证寄存器设置，然后在基准和电源稳定后再发布校准，稳定时间取决于参考源和电容负载