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TMS320F28377D: ADC A路的几个输出全是0 b路 d路可以 请问什么原因 另外 8路差分是那8路

Part Number: TMS320F28377D
Other Parts Discussed in Thread: C2000WARE

1: ADC A路的几个输出全是0  b路 d路可以 请问什么原因 另外 8路差分是那8路 

2:    暂时可以确认的是 ada的 0  1  2  三路  adb的 0  1 两路   add的0  1  两路   请问还有一路是那个 是adc 的 1(adc的2 3组成的差分 adc1测试不行 输出全0)        还是 ada的 7(差分对由 ada14  ada15组成)?

  • 1、板子是你自己设计制作的吗?如果你的引脚没有找错的话,确认一下你的引脚配置是否正确。如果是自己设计制作的板子,最好用例程先测试一下:C:\ti\c2000\C2000Ware_3_04_00_00\driverlib\f2837xd\examples\cpu1\adc

    另外,16路单端,8路差分都是自己根据ADCSOCxCTL.CHSEL寄存器配置的。

    The ADC supports two signal modes: single-ended and differential. In single-ended mode, the input voltage to the converter is sampled through a single pin (ADCINx), referenced to VREFLO. In differential signaling mode, the input voltage to the converter is sampled through a pair of input pins, one of which is the positive input (ADCINxP) and the other is the negative input (ADCINxN). The actual input voltage is the difference between the two (ADCINxP – ADCINxN).

    具体分配可以参考芯片TRM的Table 11-6. Channel Selection of Input Pins

    2、这个说实话没看懂问题是什么意思