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ADS1293的数据读取问题

Other Parts Discussed in Thread: ADS1293

使用ADS1293的管脚DRDYB中断来读取ECG1、ECG2、ECG3的数据:

1、先配置的采样是400Hz,实际用示波器量DRDYB管脚确实是400Hz;

2、后在中断采用Stream mode读取数据(按照datasheet33页的介绍做的),发现数据字节数不对,后用示波器测量此时DRDYB管脚变成200Hz方波了;

3、使用的配置DRDYB_SRC_REG(地址0x27)的值是0x08, CH_CNFG_REG(地址0x2F)值是0x70。

不知道是哪里出了问题,还请各位帮忙解答下,谢谢。