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/**
******************************************************************************
* @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 STM32F4xx TIM LL API.
* Peripheral initialization done using LL unitary services functions.
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/** @addtogroup STM32F4xx_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 100 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), PA.07 (TIM1_CH1N), PA.09 (TIM1_CH2),
* PB.00 (TIM1_CH2N), PA.10 (TIM1_CH3), PB.01 (TIM1_CH3N) and
* PA.06 (TIM1_BKIN).
* @param None
* @retval None
*/
__INLINE void ConfigureGPIO(void)
{
/******************************/
/* Peripheral clocks enabling */
/******************************/
LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_GPIOA);
LL_AHB1_GRP1_EnableClock(LL_AHB1_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);
LL_GPIO_SetAFPin_0_7(GPIOA, LL_GPIO_PIN_8, LL_GPIO_AF_1);
/* GPIO TIM1_CH1N configuration */
LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_7, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetPinPull(GPIOA, LL_GPIO_PIN_7, LL_GPIO_PULL_DOWN);
LL_GPIO_SetPinSpeed(GPIOA, LL_GPIO_PIN_7, LL_GPIO_SPEED_FREQ_HIGH);
LL_GPIO_SetAFPin_0_7(GPIOA, LL_GPIO_PIN_7, LL_GPIO_AF_1);
/* 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);
LL_GPIO_SetAFPin_8_15(GPIOA, LL_GPIO_PIN_9, LL_GPIO_AF_1);
/* GPIO TIM1_CH2N configuration */
LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_0, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetPinPull(GPIOB, LL_GPIO_PIN_0, LL_GPIO_PULL_DOWN);
LL_GPIO_SetPinSpeed(GPIOB, LL_GPIO_PIN_0, LL_GPIO_SPEED_FREQ_HIGH);
LL_GPIO_SetAFPin_0_7(GPIOB, LL_GPIO_PIN_0, LL_GPIO_AF_1);
/* 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);
LL_GPIO_SetAFPin_8_15(GPIOA, LL_GPIO_PIN_10, LL_GPIO_AF_1);
/* GPIO TIM1_CH3N configuration */
LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_1, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetPinPull(GPIOB, LL_GPIO_PIN_1, LL_GPIO_PULL_DOWN);
LL_GPIO_SetPinSpeed(GPIOB, LL_GPIO_PIN_1, LL_GPIO_SPEED_FREQ_HIGH);
LL_GPIO_SetAFPin_0_7(GPIOB, LL_GPIO_PIN_1, LL_GPIO_AF_1);
/* GPIO TIM1_BKIN configuration */
LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_6, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetPinPull(GPIOA, LL_GPIO_PIN_6, LL_GPIO_PULL_DOWN);
LL_GPIO_SetPinSpeed(GPIOA, LL_GPIO_PIN_6, LL_GPIO_SPEED_FREQ_HIGH);
LL_GPIO_SetAFPin_0_7(GPIOA, LL_GPIO_PIN_6, LL_GPIO_AF_1);
}
/**
* @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 (100 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) = 100000000
* HCLK(Hz) = 100000000
* AHB Prescaler = 1
* APB1 Prescaler = 2
* APB2 Prescaler = 1
* HSE Frequency(Hz) = 8000000
* PLL_M = 8
* PLL_N = 400
* PLL_P = 4
* VDD(V) = 3.3
* Main regulator output voltage = Scale1 mode
* Flash Latency(WS) = 3
* @param None
* @retval None
*/
void SystemClock_Config(void)
{
/* Enable HSE oscillator */
LL_RCC_HSE_EnableBypass();
LL_RCC_HSE_Enable();
while(LL_RCC_HSE_IsReady() != 1)
{
};
/* Set FLASH latency */
LL_FLASH_SetLatency(LL_FLASH_LATENCY_3);
/* Main PLL configuration and activation */
LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSE, LL_RCC_PLLM_DIV_8, 400, LL_RCC_PLLP_DIV_4);
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 */
SysTick_Config(100000000 / 1000);
/* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */
SystemCoreClock = 100000000;
}
#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
/**
* @}
*/
/**
* @}
*/
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