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AC power meter based on STM32 ADC

• Setlect a ADC and enable 2 channel, v and i.
• Set number of conversion to 2.
• Set enable scan conversion.
• Set disable continous conversion.
• Set disable discontinous conversion.
• Set disable DMA continous conversion.
• Set end of single conversion.
• Select trigger out event a timer for external trigger.
• Select trigger rising edge.
• Select both ranks with correct channel.
• Set enable DMA normal mode.
• Set internal clock for selected timer.
• Set update event on trigger evnet selection on timer configuration menu.
• Add library on project.
• Configure "pmeterConfig.h".
• Put "pmeter_callback()" in adc dma callback.
• Call "pmeter_init(timer freq: ex:32, calibration data from eeprom)".
• Put "pmeter_loop()" in infinite loop.
• before using, you should be calibrate.
• Call "pmeter_calib_step1_..." to "pmeter_calib_step4_..." and store the calibration data "pmeter.calib".

void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef *hadc)
{
  pmeter_callback();
}

void main()
{
  pmeter_calib_t calib;
  ...
  // load calibration data from eeprom to calib struct
  ...
  pmeter_init(32, calib);
  while(1)
  {
    pmeter_loop();
  }
}