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// one-dimensional interleaved array
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// one-dimensional interleaved array
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#define ADC_BUF_DEPTH 2 // depth of buffer
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#define ADC_BUF_DEPTH 2 // depth of buffer
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#define ADC_CH_NUM 2    // number of used ADC channels
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#define ADC_CH_NUM 2    // number of used ADC channels
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static adcsample_t samples_buf[ADC_BUF_DEPTH * ADC_CH_NUM]; // results array
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static adcsample_t samples_buf[ADC_BUF_DEPTH * ADC_CH_NUM]; // results array
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static int done;
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void terminateAdc(ADCDriver *adcp, adcsample_t *buffer, size_t n)
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{
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        done = true;
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        adcStopConversionI(adcp);
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}
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// Fill ADCConversionGroup structure fields
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// Fill ADCConversionGroup structure fields
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static ADCConversionGroup adccg = {
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static ADCConversionGroup adccg = {
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   // this 3 fields are common for all MCUs
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   // this 3 fields are common for all MCUs
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      // set to TRUE if need circular buffer, set FALSE otherwise
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      // set to TRUE if need circular buffer, set FALSE otherwise
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      TRUE,
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      TRUE,
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      // number of channels
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      // number of channels
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      (uint16_t)(ADC_CH_NUM),
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      (uint16_t)(ADC_CH_NUM),
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      // callback function, set to NULL for begin
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      // callback function, set to NULL for begin
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      NULL,
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      &terminateAdc,
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          // error callback function
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          // error callback function
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          NULL,
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          NULL,
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   // Resent fields are stm32 specific. They contain ADC control registers data.
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   // Resent fields are stm32 specific. They contain ADC control registers data.
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   // Please, refer to ST manual RM0008.pdf to understand what we do.
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   // Please, refer to ST manual RM0008.pdf to understand what we do.
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      // CR1 register content, set to zero for begin
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      // CR1 register content, set to zero for begin
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      0,
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      0,
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      // CR2 register content, set to zero for begin
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      // CR2 register content, set to zero for begin
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      0,
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          ADC_CR2_EXTTRIG ,
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      // SMRP1 register content, set to zero for begin
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      // SMRP1 register content, set to zero for begin
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      0,
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      0,
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      // SMRP2 register content, set to zero for begin
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      // SMRP2 register content, set to zero for begin
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      0,
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      0,
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      // SQR1 register content. Set channel sequence length
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      // SQR1 register content. Set channel sequence length
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      ((ADC_CH_NUM - 1) << 20),
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          ADC_SQR1_NUM_CH(ADC_CH_NUM),
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      // SQR2 register content, set to zero for begin
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      // SQR2 register content, set to zero for begin
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      0,
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      0,
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      // SQR3 register content. We must select 2 channels
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      // SQR3 register content. We must select 2 channels
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      // For example 2nd and 3rd channels. Refer to the
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      // For example 2nd and 3rd channels. Refer to the
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      // pinout of your MCU to select other pins you need.
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      // pinout of your MCU to select other pins you need.
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// Thats all with configuration
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// Thats all with configuration
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void useAdc(void)
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void useAdc(void)
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{
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{
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 - 
 
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  // Following 3 functions use previously created configuration
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  // Following 3 functions use previously created configuration
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  // to initialize ADC block, start ADC block and start conversion.
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  // to initialize ADC block, start ADC block and start conversion.
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  // &ADCD1 is pointer to ADC driver structure, defined in the depths of HAL.
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  // &ADCD1 is pointer to ADC driver structure, defined in the depths of HAL.
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  // Other arguments defined ourself earlier.
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  // Other arguments defined ourself earlier.
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  adcStart(&ADCD1, &adccfg);
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  adcStart(&ADCD1, &adccfg);
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  adcStartConversion(&ADCD1, &adccg, &samples_buf[0], ADC_BUF_DEPTH);
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   // samples in to buffer
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}
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}
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adcsample_t getAdc(uint8_t chan)
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adcsample_t getAdc(uint8_t chan)
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{
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{
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        return(samples_buf[chan & 1]);
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        return(samples_buf[chan & 1]);
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}
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}
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// samples into buffer
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void adcSample(void)
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{
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        done = false;
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adcConvert(&ADCD1, &adccg, &samples_buf[0], ADC_BUF_DEPTH);
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    while(!done)
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       chThdSleep(10);
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}
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