stuff

firmware/67percent/Core/Src/pwm.c

@@ -0,0 +1,41 @@
+#include "pwm.h"
+#include "tim.h"
+
+void MX_PWM_Init(void){
+    TIM_OC_InitTypeDef sConfigOC = {0};
+
+    // Initialize TIM2 for PWM (safe to call even if TIM2 was previously initialized for OC)
+    if (HAL_TIM_PWM_Init(&htim2) != HAL_OK){
+        Error_Handler();
+    }
+
+    sConfigOC.OCMode = TIM_OCMODE_PWM1;
+    sConfigOC.Pulse = 0;
+    sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
+    sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
+    if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_1) != HAL_OK){
+        Error_Handler();
+    }
+}
+
+void PWM_Start(void){
+    HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_1);
+}
+
+void PWM_Stop(void){
+    HAL_TIM_PWM_Stop(&htim2, TIM_CHANNEL_1);
+}
+
+void PWM_SetDuty(uint32_t duty){
+    // Clamp duty to timer period
+    uint32_t period = htim2.Init.Period;
+    if(duty > period) duty = period;
+    __HAL_TIM_SET_COMPARE(&htim2, TIM_CHANNEL_1, duty);
+}
+
+void PWM_SetPercent(uint8_t percent){
+    if(percent > 100) percent = 100;
+    uint32_t period = htim2.Init.Period;
+    uint32_t duty = (period * percent) / 100;
+    PWM_SetDuty(duty);
+}