From 063456aaca40111b396ca2a79aff34c577d3a605 Mon Sep 17 00:00:00 2001
From: Carsten Keller <mail@carstenkeller.dev>
Date: Sun, 9 Jun 2024 17:57:51 +0200
Subject: [PATCH] =?UTF-8?q?TIM3=20CH1=20(PC6)=20mit=2025kHz=20initialisier?=
 =?UTF-8?q?t.=20=C3=9Cber=20LL=5FTIM=5FOC=5FSetCompareCH1=20kann=20der=20D?=
 =?UTF-8?q?uty-Cycle=20bestimmt=20werden=20von=200=20bis=202559=20(0=20-?=
 =?UTF-8?q?=20100%)?=
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---
 Source/FanControl.cpp | 61 +++++++++++++++++++++++++++++++++++++++++++
 Source/FanControl.hpp | 26 ++++++++++++++++++
 2 files changed, 87 insertions(+)
 create mode 100644 Source/FanControl.cpp
 create mode 100644 Source/FanControl.hpp

diff --git a/Source/FanControl.cpp b/Source/FanControl.cpp
new file mode 100644
index 0000000..87b90c2
--- /dev/null
+++ b/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);
+  }
+}
diff --git a/Source/FanControl.hpp b/Source/FanControl.hpp
new file mode 100644
index 0000000..af0e7cd
--- /dev/null
+++ b/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_ */