STM32

STM32W108 ADC多通道问题

2019-07-14 18:16发布

站内问答 / STM32/STM8
12538 5 1306
STM32W108单通道如下设置就可以了

void ADCConfiguration(void){
  // 将GPIOA的引脚5定义为模拟输入
  halGpioConfig(PORTA_PIN(5), GPIOCFG_ANALOG);
  
    ADC_CFG = 0;
    ADC_OFFSET = 0;
    ADC_GAIN = 0x8000;
    ADC_DMACFG = ADC_DMARST;
  
    ADC_DMACFG = (ADC_DMAAUTOWRAP | ADC_DMALOAD);
   ADC_DMABEG = (int32u)&adcData;
    ADC_DMASIZE = 1;
  
  // DMA缓冲区满中断使能
  INT_ADCCFG = INT_ADCULDFULL;
  // 清除所有中断标志
  INT_ADCFLAG = 0xFFFF;
  // 使能ADC全局中断
  INT_CFGSET = INT_ADC;
  
  ADC_CFG = (// 采样时间：1024 clocks，有效位：10 bits
               (5
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5条回答
tan8561
2019-07-15 14:27
4.  Write the desired offset and gain correction values to the ADC_OFFSETR and
ADC_GAINR registers.
5.  Start the ADC and the DMA.
Write the desired conversion configuration, with the ADC_EN bit set, to ADC_CR.
Clear the ADC buffer full flag – write DMABF to ADC_ISR.
Start the DMA in auto wrap mode – set the AUTOWRAP and LOAD bits in
ADC_DMACR.
6.  Wait until the DMABF bit is set in ADC_ISR, then read the result from analogData.
To convert multiple inputs using this approach, repeat Steps 4 through 6, loading the desired
input configurations to ADC_CR in Step 5. If the inputs can use the same offset/gain
correction, just repeat Steps 5 and 6.

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