Diff: main.c

Revision:

2:5acdd8565d02

Parent:

0:a9bbfbd216e8

--- a/main.c	Fri Feb 24 21:13:56 2017 +0000
+++ b/main.c	Sat Feb 25 00:23:53 2017 +0000
@@ -2,28 +2,54 @@
 #include "stm32l476g_discovery.h"
 #include "stm32l4xx_hal.h"
 
+TIM_HandleTypeDef hTim;
+TIM_OC_InitTypeDef timOutChannel;
+RCC_ClkInitTypeDef RCC_ClkInitStruct;
 
-// main() runs in its own thread in the OS
-// (note the calls to wait below for delays)
-int main() {
+int main()
+{
+    // Configure Timer base
+    __HAL_RCC_TIM1_CLK_ENABLE();
+
+    hTim.Instance = TIM1;
+    hTim.Init.Prescaler = 8000;
+    hTim.Init.Period = 10000;
+    hTim.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
+    hTim.Init.CounterMode = TIM_COUNTERMODE_UP;
+    hTim.Init.RepetitionCounter = 0;
+    HAL_TIM_PWM_Init(&hTim);
 
-    LED4_GPIO_CLK_ENABLE();
+    // Configure Timer channel
+    timOutChannel.OCMode       = TIM_OCMODE_PWM1;
+    timOutChannel.OCPolarity   = TIM_OCPOLARITY_HIGH;
+    timOutChannel.OCFastMode   = TIM_OCFAST_DISABLE;
+    timOutChannel.OCNPolarity  = TIM_OCNPOLARITY_HIGH;
+    timOutChannel.OCNIdleState = TIM_OCNIDLESTATE_RESET;
+    timOutChannel.OCIdleState  = TIM_OCIDLESTATE_RESET;
+    timOutChannel.Pulse = 5000;
+    HAL_TIM_PWM_ConfigChannel(&hTim, &timOutChannel, TIM_CHANNEL_1);
+    HAL_TIMEx_OCN_Start(&hTim, TIM_CHANNEL_1);
+
+    // Configure GPIO
     LED5_GPIO_CLK_ENABLE();
-    
     GPIO_InitTypeDef gpio;
-    gpio.Mode = GPIO_MODE_OUTPUT_PP;
+
+    gpio.Mode = GPIO_MODE_AF_PP;
     gpio.Pull = GPIO_NOPULL;
-    gpio.Speed = GPIO_SPEED_FREQ_LOW;
-    gpio.Pin = LED4_PIN;
-    HAL_GPIO_Init(LED4_GPIO_PORT, &gpio);
-
+    gpio.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
+    gpio.Alternate = GPIO_AF1_TIM1;
     gpio.Pin = LED5_PIN;
     HAL_GPIO_Init(LED5_GPIO_PORT, &gpio);
 
-    while (1) {
-        HAL_GPIO_TogglePin(LED5_GPIO_PORT, LED5_PIN);
-        HAL_Delay(300);
-        HAL_GPIO_TogglePin(LED4_GPIO_PORT, LED4_PIN);
-    }
+    //Start timer
+    HAL_TIM_Base_Start(&hTim);
+    HAL_TIM_PWM_Start(&hTim, TIM_CHANNEL_1);
+
+    while(1)   {}
 }
 
+/************** TODO **********************
+  - Increase frequency
+  - Control pwm brightness with joystick
+
+*/