main.c

00001 #define USE_STM32L476G_DISCO_REVC
00002 #include "stm32l476g_discovery.h"
00003 #include "stm32l4xx_hal.h"
00004 
00005 TIM_HandleTypeDef hTim;
00006 TIM_OC_InitTypeDef timOutChannel;
00007 RCC_ClkInitTypeDef RCC_ClkInitStruct;
00008 
00009 int main()
00010 {
00011     // Configure Timer base
00012     __HAL_RCC_TIM1_CLK_ENABLE();
00013 
00014     hTim.Instance = TIM1;
00015     hTim.Init.Prescaler = 8000;
00016     hTim.Init.Period = 10000;
00017     hTim.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
00018     hTim.Init.CounterMode = TIM_COUNTERMODE_UP;
00019     hTim.Init.RepetitionCounter = 0;
00020     HAL_TIM_PWM_Init(&hTim);
00021 
00022     // Configure Timer channel
00023     timOutChannel.OCMode       = TIM_OCMODE_PWM1;
00024     timOutChannel.OCPolarity   = TIM_OCPOLARITY_HIGH;
00025     timOutChannel.OCFastMode   = TIM_OCFAST_DISABLE;
00026     timOutChannel.OCNPolarity  = TIM_OCNPOLARITY_HIGH;
00027     timOutChannel.OCNIdleState = TIM_OCNIDLESTATE_RESET;
00028     timOutChannel.OCIdleState  = TIM_OCIDLESTATE_RESET;
00029     timOutChannel.Pulse = 5000;
00030     HAL_TIM_PWM_ConfigChannel(&hTim, &timOutChannel, TIM_CHANNEL_1);
00031     HAL_TIMEx_OCN_Start(&hTim, TIM_CHANNEL_1);
00032 
00033     // Configure GPIO
00034     LED5_GPIO_CLK_ENABLE();
00035     GPIO_InitTypeDef gpio;
00036 
00037     gpio.Mode = GPIO_MODE_AF_PP;
00038     gpio.Pull = GPIO_NOPULL;
00039     gpio.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
00040     gpio.Alternate = GPIO_AF1_TIM1;
00041     gpio.Pin = LED5_PIN;
00042     HAL_GPIO_Init(LED5_GPIO_PORT, &gpio);
00043 
00044     //Start timer
00045     HAL_TIM_Base_Start(&hTim);
00046     HAL_TIM_PWM_Start(&hTim, TIM_CHANNEL_1);
00047 
00048     while(1)   {}
00049 }
00050 
00051 /************** TODO **********************
00052   - Increase frequency
00053   - Control pwm brightness with joystick
00054 
00055 */