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ads1243 寄存器读取不准

Other Parts Discussed in Thread: ADS1243, ADS1242, AWR1243

如题 我现在读取ads1243  FSR0 和1 的时候初始化的值时对时不对。有什么方法能解决的?

  • 这种情况, 通常最大的可能是硬件问题, 检查电源供电是否稳定, 连接焊接是否正常

    还有时序的问题, 检查时序波形是否满足手册要求, 并有一定的时间裕量

  • 有没有做系统增益校验system gain calibration? 

    For a system gain calibration, the input should be set to the reference voltage and the ADS1242 and ADS1243 compute the FSR value that will compensate for gain errors. The FSR is updated after this operation. To initiate a system gain calibration, the user must apply a full-scale input signal to the appropriate analog inputs. FCR register is updated automatically。

  • 你好,

    你可以根据AWR1243 datasheet中的5.9.3.2部分查看你的SPI通信时序,注意需要使用IRQ(SPI_HOST_INTR_1)管脚。