# Using DAC on STM32

### GPIO Configuration

The DAC module does not require much config. Enable the peripheral and configure the output to the desired pins.

### Start the DAC

```c
HAL_DAC_Start(&hdac, DAC_CHANNEL_1);
```

### Update DAC value

```c
HAL_DAC_SetValue(&hdac, DAC_CHANNEL_1, DAC_ALIGN_8B_R, 100);
```

### Example program

an example program to generate triangle wave on output.

```c
void APP_init() {
  HAL_DAC_Start(&hdac, DAC_CHANNEL_1);

  uint8_t value = 0;
  while (1) {
    HAL_DAC_SetValue(&hdac, DAC_CHANNEL_1, DAC_ALIGN_8B_R, value);
    value += 1;
  }
}
```

<figure><img src="/files/23HJy9jSxYtbUSjp3G4D" alt=""><figcaption></figcaption></figure>


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