DAC enabled Wio 3G test code.

Wio3GDacTest.ino

// https://github.com/kekyo/SeeedJP_STM32F4/commit/cf9cd45caaae41c1d5e71eeec5ea3d25bcc2dae0

#include <Wio3GforArduino.h>

Wio3G Wio;

void setup()
{
  SerialUSB.begin(115200);
  SerialUSB.println("");
  SerialUSB.println("============== Start DAC test (Wio 3G)");

  Wio.Init();

  Wio.PowerSupplyGrove(true);
  delay(100);

  pinMode(WIO_A4, OUTPUT_ANALOG);
  pinMode(WIO_A5, OUTPUT_ANALOG);

  delay(1000);
}

void loop() {
  for (int j = 0; j < 1000; j++)
  {
    for (int i = 0; i < 4096; i++)
    {
      analogWrite(WIO_A4, i);
      analogWrite(WIO_A5, 4095 - i);
      delayMicroseconds(10);
    }
  }
}