TIM3 CH1 (PC6) mit 25kHz initialisiert.

Über LL_TIM_OC_SetCompareCH1 kann der Duty-Cycle bestimmt werden von 0 bis 2559 (0 - 100%)

Source/FanControl.cpp

@@ -0,0 +1,61 @@
+/*
+ * FanControl.cpp
+ *
+ *  Created on: 27.07.2023
+ *      Author: Carst
+ */
+
+#include <stm32g0xx_ll_bus.h>
+#include <stm32g0xx_ll_gpio.h>
+#include <stm32g0xx_ll_tim.h>
+#include "FanControl.hpp"
+
+namespace ElektronischeLast
+{
+  FanControl::FanControl(void)
+  {
+    LL_TIM_InitTypeDef TIM_InitStruct = {
+      .Prescaler = 0UL,
+      .CounterMode = LL_TIM_COUNTERMODE_UP,
+      .Autoreload = 2559UL,
+      .ClockDivision = LL_TIM_CLOCKDIVISION_DIV1,
+    };
+    LL_TIM_Init(TIM3, &TIM_InitStruct);
+
+    LL_TIM_DisableARRPreload(TIM3);
+    LL_TIM_OC_EnablePreload(TIM3, LL_TIM_CHANNEL_CH1);
+    LL_TIM_OC_InitTypeDef TIM_OC_InitStruct = {
+      .OCMode = LL_TIM_OCMODE_PWM1,
+      .OCState = LL_TIM_OCSTATE_ENABLE,
+      .OCNState = LL_TIM_OCSTATE_DISABLE,
+      .CompareValue = 0UL,
+      .OCPolarity = LL_TIM_OCPOLARITY_HIGH,
+    };
+    LL_TIM_OC_Init(TIM3, LL_TIM_CHANNEL_CH1, &TIM_OC_InitStruct);
+    LL_TIM_OC_DisableFast(TIM3, LL_TIM_CHANNEL_CH1);
+    LL_TIM_SetTriggerOutput(TIM3, LL_TIM_TRGO_RESET);
+    LL_TIM_DisableMasterSlaveMode(TIM3);
+
+    /**TIM3 GPIO Configuration
+    PC6   ------> TIM3_CH1
+    */
+    LL_GPIO_InitTypeDef GPIO_InitStruct = {
+      .Pin = LL_GPIO_PIN_6,
+      .Mode = LL_GPIO_MODE_ALTERNATE,
+      .Speed = LL_GPIO_SPEED_FREQ_LOW,
+      .OutputType = LL_GPIO_OUTPUT_PUSHPULL,
+      .Pull = LL_GPIO_PULL_NO,
+      .Alternate = LL_GPIO_AF_1,
+    };
+    LL_GPIO_Init(GPIOC, &GPIO_InitStruct);
+
+    LL_TIM_EnableCounter(TIM3);
+
+    this->compare_value = 0UL;
+  }
+
+  void FanControl::run(std::uint32_t temp)
+  {
+    LL_TIM_OC_SetCompareCH1(TIM3, this->compare_value);
+  }
+}

Source/FanControl.hpp

@@ -0,0 +1,26 @@
+/*
+ * FanControl.hpp
+ *
+ *  Created on: 27.07.2023
+ *      Author: Carst
+ */
+
+#ifndef FANCONTROL_HPP_
+#define FANCONTROL_HPP_
+
+#include <cstdint>
+
+namespace ElektronischeLast
+{
+  class FanControl
+  {
+    public:
+      FanControl(void);
+      ~FanControl(void);
+      void run(std::uint32_t temp);
+    private:
+      std::uint32_t compare_value;
+  };
+}
+
+#endif /* FANCONTROL_HPP_ */