/** ****************************************************************************** * @file Examples_LL/TIM/TIM_BreakAndDeadtime/Src/main.c * @author MCD Application Team * @brief This example shows how to configure the TIMER peripheral to generate * three center aligned PWM and complementary PWM signals, * to insert a defined dead time value, to use the break feature and * to lock the desired parameters, using the STM32F1xx TIM LL API. * Peripheral initialization done using LL unitary services functions. ****************************************************************************** * @attention * *

© Copyright (c) 2016 STMicroelectronics. * All rights reserved.

* * This software component is licensed by ST under BSD 3-Clause license, * the "License"; You may not use this file except in compliance with the * License. You may obtain a copy of the License at: * opensource.org/licenses/BSD-3-Clause * ****************************************************************************** */ /* Includes ------------------------------------------------------------------*/ #include "main.h" /** @addtogroup STM32F1xx_LL_Examples * @{ */ /** @addtogroup TIM_BreakAndDeadtime * @{ */ /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Private function prototypes -----------------------------------------------*/ __STATIC_INLINE void SystemClock_Config(void); __STATIC_INLINE void ConfigureGPIO(void); __STATIC_INLINE void ConfigureTIMBreakAndDeadtime(void); /* Private functions ---------------------------------------------------------*/ /** * @brief Main program * @param None * @retval None */ int main(void) { /* Configure the system clock to 72 MHz */ SystemClock_Config(); /* Configure GPIO ports */ ConfigureGPIO(); /* Configure timer instance */ ConfigureTIMBreakAndDeadtime(); /* Infinite loop */ while (1) { } } /** * @brief This function enables the peripheral clocks on required GPIOs and * configures PA.08 (TIM1_CH1), PB.13 (TIM1_CH1N), PA.09 (TIM1_CH2), * PB.14 (TIM1_CH2N), PA.10 (TIM1_CH3), PB.15 (TIM1_CH3N) and * PB.12 (TIM1_BKIN). * @param None * @retval None */ __INLINE void ConfigureGPIO(void) { /******************************/ /* Peripheral clocks enabling */ /******************************/ LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_GPIOA); LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_GPIOB); /*************************/ /* GPIO AF configuration */ /*************************/ /* GPIO TIM1_CH1 configuration */ LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_8, LL_GPIO_MODE_ALTERNATE); LL_GPIO_SetPinPull(GPIOA, LL_GPIO_PIN_8, LL_GPIO_PULL_DOWN); LL_GPIO_SetPinSpeed(GPIOA, LL_GPIO_PIN_8, LL_GPIO_SPEED_FREQ_HIGH); /* GPIO TIM1_CH1N configuration */ LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_13, LL_GPIO_MODE_ALTERNATE); LL_GPIO_SetPinPull(GPIOB, LL_GPIO_PIN_13, LL_GPIO_PULL_DOWN); LL_GPIO_SetPinSpeed(GPIOB, LL_GPIO_PIN_13, LL_GPIO_SPEED_FREQ_HIGH); /* GPIO TIM1_CH2 configuration */ LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_9, LL_GPIO_MODE_ALTERNATE); LL_GPIO_SetPinPull(GPIOA, LL_GPIO_PIN_9, LL_GPIO_PULL_DOWN); LL_GPIO_SetPinSpeed(GPIOA, LL_GPIO_PIN_9, LL_GPIO_SPEED_FREQ_HIGH); /* GPIO TIM1_CH2N configuration */ LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_14, LL_GPIO_MODE_ALTERNATE); LL_GPIO_SetPinPull(GPIOB, LL_GPIO_PIN_14, LL_GPIO_PULL_DOWN); LL_GPIO_SetPinSpeed(GPIOB, LL_GPIO_PIN_14, LL_GPIO_SPEED_FREQ_HIGH); /* GPIO TIM1_CH3 configuration */ LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_10, LL_GPIO_MODE_ALTERNATE); LL_GPIO_SetPinPull(GPIOA, LL_GPIO_PIN_10, LL_GPIO_PULL_DOWN); LL_GPIO_SetPinSpeed(GPIOA, LL_GPIO_PIN_10, LL_GPIO_SPEED_FREQ_HIGH); /* GPIO TIM1_CH3N configuration */ LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_15, LL_GPIO_MODE_ALTERNATE); LL_GPIO_SetPinPull(GPIOB, LL_GPIO_PIN_15, LL_GPIO_PULL_DOWN); LL_GPIO_SetPinSpeed(GPIOB, LL_GPIO_PIN_15, LL_GPIO_SPEED_FREQ_HIGH); /* GPIO TIM1_BKIN configuration */ LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_12, LL_GPIO_MODE_ALTERNATE); LL_GPIO_SetPinPull(GPIOB, LL_GPIO_PIN_12, LL_GPIO_PULL_DOWN); LL_GPIO_SetPinSpeed(GPIOB, LL_GPIO_PIN_12, LL_GPIO_SPEED_FREQ_HIGH); } /** * @brief This function enables the peripheral clock on TIM1, * configures the TIM1 counter in center-aligned mode, * configures the output channels to generate complementary PWM signals * with 4 us dead-time insertion, configures the break function, * sets the lock level and starts output signals generation. * @note Peripheral configuration is minimal configuration from reset values. * Thus, some useless LL unitary functions calls below are provided as * commented examples - setting is default configuration from reset. * @param None * @retval None */ __STATIC_INLINE void ConfigureTIMBreakAndDeadtime(void) { /*****************************/ /* Peripheral clock enabling */ /*****************************/ /* Enable the peripheral clock of TIM1 */ LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_TIM1); /***************************/ /* Time base configuration */ /***************************/ /* Select center-aligned mode */ LL_TIM_SetCounterMode(TIM1, LL_TIM_COUNTERMODE_CENTER_UP); /* Set the TIM1 prescaler to get counter clock frequency at 10 MHz */ /* In this example TIM1 input clock (TIM1CLK) frequency is set to APB2 */ /* (PCLK2), since APB2 pre-scaler is equal to 1. */ /* TIM1CLK = PCLK2 */ /* PCLK2 = HCLK */ /* => TIM1CLK = HCLK = SystemCoreClock (72 Mhz) */ LL_TIM_SetPrescaler(TIM1, __LL_TIM_CALC_PSC(SystemCoreClock, 10000000)); /* Set the TIM1 auto-reload register to get a PWM frequency at 10 KHz */ /* Note that in macro call below, targeted PWM frequency must be multiplied */ /* by 2 when the counter operates in center-aligned mode (due to the */ /* symmetry of the pattern). */ LL_TIM_SetAutoReload(TIM1, __LL_TIM_CALC_ARR(SystemCoreClock, LL_TIM_GetPrescaler(TIM1), 10000*2)); /*********************************/ /* Output waveform configuration */ /*********************************/ /* Set output channel 1 in PWM1 mode */ LL_TIM_OC_SetMode(TIM1, LL_TIM_CHANNEL_CH1, LL_TIM_OCMODE_PWM1); /* Output channel 1 configuration: */ LL_TIM_OC_ConfigOutput(TIM1, LL_TIM_CHANNEL_CH1, LL_TIM_OCPOLARITY_HIGH | LL_TIM_OCIDLESTATE_HIGH); /* Set PWM output channel 1 duty cycle to 50% */ LL_TIM_OC_SetCompareCH1(TIM1, LL_TIM_GetAutoReload(TIM1) * 500 / 1000 ); /* Set output channel 2 in PWM1 mode */ LL_TIM_OC_SetMode(TIM1, LL_TIM_CHANNEL_CH2, LL_TIM_OCMODE_PWM1); /* Output channel 2 configuration: */ LL_TIM_OC_ConfigOutput(TIM1, LL_TIM_CHANNEL_CH2, LL_TIM_OCPOLARITY_HIGH | LL_TIM_OCIDLESTATE_HIGH); /* Set PWM output channel 2 duty cycle to 25% */ LL_TIM_OC_SetCompareCH2(TIM1, LL_TIM_GetAutoReload(TIM1) * 250 / 1000 ); /* Set output channel 3 in PWM1 mode */ LL_TIM_OC_SetMode(TIM1, LL_TIM_CHANNEL_CH3, LL_TIM_OCMODE_PWM1); /* Output channel 3 configuration: */ LL_TIM_OC_ConfigOutput(TIM1, LL_TIM_CHANNEL_CH3, LL_TIM_OCPOLARITY_HIGH | LL_TIM_OCIDLESTATE_HIGH); /* Set PWM output channel 3 duty cycle to 12.5% */ LL_TIM_OC_SetCompareCH3(TIM1, LL_TIM_GetAutoReload(TIM1) * 125 / 1000 ); /* Enable register preload for every output channels */ LL_TIM_OC_EnablePreload(TIM1, LL_TIM_CHANNEL_CH1); LL_TIM_OC_EnablePreload(TIM1, LL_TIM_CHANNEL_CH2); LL_TIM_OC_EnablePreload(TIM1, LL_TIM_CHANNEL_CH3); /* Set dead time to 4 us (4000 ns) */ LL_TIM_OC_SetDeadTime(TIM1, __LL_TIM_CALC_DEADTIME(SystemCoreClock, LL_TIM_GetClockDivision(TIM1), 4000)); /********************************/ /* Break function configuration */ /********************************/ /* Break input configuration: */ LL_TIM_ConfigBRK(TIM1, LL_TIM_BREAK_POLARITY_HIGH); /* Outputs are automatically re-enabled when the *break input is no longer */ /* active */ LL_TIM_EnableAutomaticOutput(TIM1); /* Select the outputs off state in Idle and Run modes */ LL_TIM_SetOffStates(TIM1, LL_TIM_OSSI_ENABLE, LL_TIM_OSSR_ENABLE); /* Enable the break input: */ LL_TIM_EnableBRK(TIM1); /**************************/ /* Lock level programming */ /**************************/ /* Set lock level to 1: */ /* From this point onward, deadtime, outputs idle state, break input */ /* configuration and automatic output enabling can no longer be written */ LL_TIM_CC_SetLockLevel(TIM1, LL_TIM_LOCKLEVEL_1); /**********************************/ /* Start output signal generation */ /**********************************/ /* Enable outputs OC1, OC1N, OC2, OC2N, OC3 and OC3N */ LL_TIM_CC_EnableChannel(TIM1, LL_TIM_CHANNEL_CH1 | LL_TIM_CHANNEL_CH1N | LL_TIM_CHANNEL_CH2 | LL_TIM_CHANNEL_CH2N | LL_TIM_CHANNEL_CH3 | LL_TIM_CHANNEL_CH3N); /* Enable TIM1 outputs */ LL_TIM_EnableAllOutputs(TIM1); /* Enable counter */ LL_TIM_EnableCounter(TIM1); /* Force update generation */ LL_TIM_GenerateEvent_UPDATE(TIM1); } /** * @brief System Clock Configuration * The system Clock is configured as follow : * System Clock source = PLL (HSE) * SYSCLK(Hz) = 72000000 * HCLK(Hz) = 72000000 * AHB Prescaler = 1 * APB1 Prescaler = 2 * APB2 Prescaler = 1 * HSE Frequency(Hz) = 8000000 * PLLMUL = 9 * Flash Latency(WS) = 2 * @param None * @retval None */ void SystemClock_Config(void) { /* Set FLASH latency */ LL_FLASH_SetLatency(LL_FLASH_LATENCY_2); /* Enable HSE oscillator */ LL_RCC_HSE_EnableBypass(); LL_RCC_HSE_Enable(); while(LL_RCC_HSE_IsReady() != 1) { }; /* Main PLL configuration and activation */ LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSE_DIV_1, LL_RCC_PLL_MUL_9); LL_RCC_PLL_Enable(); while(LL_RCC_PLL_IsReady() != 1) { }; /* Sysclk activation on the main PLL */ LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1); LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL); while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL) { }; /* Set APB1 & APB2 prescaler*/ LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_2); LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1); /* Set systick to 1ms in using frequency set to 72MHz */ LL_Init1msTick(72000000); /* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */ LL_SetSystemCoreClock(72000000); } #ifdef USE_FULL_ASSERT /** * @brief Reports the name of the source file and the source line number * where the assert_param error has occurred. * @param file: pointer to the source file name * @param line: assert_param error line source number * @retval None */ void assert_failed(uint8_t *file, uint32_t line) { /* User can add his own implementation to report the file name and line number, ex: printf("Wrong parameters value: file %s on line %d", file, line) */ /* Infinite loop */ while (1) { } } #endif /** * @} */ /** * @} */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/