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您好,
关于原理图,不使用的17和18管脚管脚接AVDD:
不使用的GPIO 接地:
在EVM板用户指南中提供了EVM板原理图,您可以参考:
ADS1298ECGFE-PDK, ADS1198ECGFE-PDK (Rev. D)
在下面链接FAQ 中 EVM support 部分提供了source code ,您可以参考:
[FAQ] Common Questions for TI's ADS129x Family of Bio-Potential ADCs