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ADS1256与TMS320F2812的连接

Other Parts Discussed in Thread: ADS1256

想将ADS1256与2812通过SPI口连接起来。有没有相关读写程序的范例?2812的外设AD不用,应该如何接线?

  • 2812的SPI模块使用可以参考例程包中的spi_loopback_interrupts例程:

    http://focus.ti.com.cn/cn/docs/toolsw/folders/print/sprc097.html

     

    ADC不用如下面这样连接:

    • VDD1A18/VDD2A18 – Connect to VDD
    • VDDA2, VDDAIO – Connect to VDDIO
    • VSS1AGND/VSS2AGND, VSSA2, VSSAIO – Connect to VSS
    • ADCLO – Connect to VSS
    • ADCREFIN – Connect to VSS
    • ADCREFP/ADCREFM – Connect a 100-nF cap to VSS
    • ADCRESEXT – Connect a 22-kΩ resistor (very loose tolerance) to VSS
    • ADCINAn, ADCINBn - Connect to VSS
    When the ADC is not being used, disable the clock to the ADC module to save power.

  • 2812芯片中有2个1.8V的模拟电源 VDD1A18/VDD2A18 么?为什么查询时只有一个1.8V的ADC数字电源,没有1.8V的模拟电源接口?

  • 该连接方案是针对所有的C2000芯片不用ADC模块时的,有些C2000芯片有该引脚

  • 明白了,谢谢您