big refactoring and features added

App/Devices/stm32_dac_output.c

@@ -0,0 +1,45 @@
+/**
+ * @file stm32_dac_output.c
+ * @brief STM32 internal DAC helper for the PA4 analogue output.
+ */
+
+#include "stm32_dac_output.h"
+
+#include "main.h"
+
+#define STM32_DAC_MAX_CODE 4095u
+
+void stm32_dac_output_init(void)
+{
+    GPIO_InitTypeDef gpio_init = {0};
+
+    __HAL_RCC_DAC_CLK_ENABLE();
+    __HAL_RCC_GPIOA_CLK_ENABLE();
+
+    gpio_init.Pin = GPIO_PIN_4;
+    gpio_init.Mode = GPIO_MODE_ANALOG;
+    gpio_init.Pull = GPIO_NOPULL;
+    HAL_GPIO_Init(GPIOA, &gpio_init);
+
+    DAC->CR &= ~(DAC_CR_EN1 | DAC_CR_TEN1 | DAC_CR_DMAEN1);
+    DAC->DHR12R1 = 0u;
+}
+
+void stm32_dac_output_set(uint16_t dac_code, uint8_t enabled)
+{
+    if (dac_code > STM32_DAC_MAX_CODE)
+    {
+        dac_code = STM32_DAC_MAX_CODE;
+    }
+
+    DAC->DHR12R1 = dac_code;
+
+    if (enabled != 0u)
+    {
+        DAC->CR |= DAC_CR_EN1;
+    }
+    else
+    {
+        DAC->CR &= ~DAC_CR_EN1;
+    }
+}