405 lines
14 KiB
C
405 lines
14 KiB
C
/**
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******************************************************************************
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* @file Examples_LL/TIM/TIM_OnePulse/Src/main.c
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* @author MCD Application Team
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* @brief This example describes how to use a timer instance in one
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* pulse mode through the STM32F1xx TIM LL API.
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* Peripheral initialization done using LL unitary services functions.
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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/** @addtogroup STM32F1xx_LL_Examples
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* @{
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*/
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/** @addtogroup TIM_OnePulse
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Measured pulse delay (in us) */
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__IO uint32_t uwMeasuredDelay = 0;
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/* Measured pulse length (in us) */
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__IO uint32_t uwMeasuredPulseLength = 0;
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/* Private function prototypes -----------------------------------------------*/
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__STATIC_INLINE void SystemClock_Config(void);
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__STATIC_INLINE void ConfigureTIMOnePulse_SwTrigger(void);
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__STATIC_INLINE void ConfigureTIMOnePulse_TI2Trigger(void);
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__STATIC_INLINE void UserButton_Init(void);
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/* Private functions ---------------------------------------------------------*/
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/**
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* @brief Main program
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* @param None
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* @retval None
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*/
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int main(void)
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{
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/* Configure the system clock to 72 MHz MHz */
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SystemClock_Config();
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/* Initialize button in EXTI mode */
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UserButton_Init();
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/* Configure timer instance in one pulse mode: timer counter is started by */
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/* software. */
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ConfigureTIMOnePulse_SwTrigger();
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/* Configure timer instance in one pulse mode: timer counter is started by */
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/* rising edge on the TI2 input pin. */
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ConfigureTIMOnePulse_TI2Trigger();
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/* Infinite loop */
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while (1)
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{
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}
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}
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/**
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* @brief This function configures TIM3 to generate a positive pulse on OC1
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* with a length of 50 us and after a delay of 50 us after enabling
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* the timer counter.
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* @note The counter is enabled every time the user presses the user button.
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* @note The delay and the pulse length are measured in the CC1 interrupt
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* service routine.
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* @note Peripheral configuration is minimal configuration from reset values.
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* Thus, some useless LL unitary functions calls below are provided as
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* commented examples - setting is default configuration from reset.
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* @param None
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* @retval None
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*/
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__STATIC_INLINE void ConfigureTIMOnePulse_SwTrigger(void)
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{
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/*************************/
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/* GPIO AF configuration */
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/*************************/
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/* Enable the peripheral clock of GPIOs */
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LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_GPIOA);;
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/* GPIO TIM3_CH1 configuration */
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LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_6, LL_GPIO_MODE_ALTERNATE);
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LL_GPIO_SetPinPull(GPIOA, LL_GPIO_PIN_6, LL_GPIO_PULL_DOWN);
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LL_GPIO_SetPinSpeed(GPIOA, LL_GPIO_PIN_6, LL_GPIO_SPEED_FREQ_HIGH);
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/***********************************************/
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/* Configure the NVIC to handle TIM3 interrupt */
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/***********************************************/
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NVIC_SetPriority(TIM3_IRQn, 0);
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NVIC_EnableIRQ(TIM3_IRQn);
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/******************************/
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/* Peripheral clocks enabling */
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/******************************/
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/* Enable the peripheral clock of TIM3 */
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LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_TIM3);
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/*********************************/
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/* Output waveform configuration */
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/*********************************/
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/* Select counter mode: counting up */
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LL_TIM_SetCounterMode(TIM3, LL_TIM_COUNTERMODE_UP);
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/* Set the one pulse mode: generate only 1 pulse*/
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LL_TIM_SetOnePulseMode(TIM3, LL_TIM_ONEPULSEMODE_SINGLE);
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/* Set the TIM3 prescaler to get counter clock frequency at 10 MHz */
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/* In this example TIM3 input clock (TIM3CLK) is set to APB1 clock (PCLK2), */
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/* since APB1 pre-scaler is equal to 1. */
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/* TIM3CLK = PCLK2 */
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/* PCLK2 = HCLK */
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/* => TIM3CLK = SystemCoreClock (72 MHz) */
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LL_TIM_SetPrescaler(TIM3, __LL_TIM_CALC_PSC(SystemCoreClock, 10000000));
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/* Set the capture/compare register to get a pulse delay of 50 us */
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LL_TIM_OC_SetCompareCH1(TIM3, __LL_TIM_CALC_DELAY(SystemCoreClock, LL_TIM_GetPrescaler(TIM3), 50));
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/* Set the autoreload register to get a pulse length of 50s */
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LL_TIM_SetAutoReload(TIM3, __LL_TIM_CALC_PULSE(SystemCoreClock, LL_TIM_GetPrescaler(TIM3), 50, 50));
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/* Set output channel 1 in PWM2 mode */
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LL_TIM_OC_SetMode(TIM3, LL_TIM_CHANNEL_CH1, LL_TIM_OCMODE_PWM2);
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/* Configure output channel 1 */
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LL_TIM_OC_ConfigOutput(TIM3, LL_TIM_CHANNEL_CH1, LL_TIM_OCPOLARITY_HIGH | LL_TIM_OCIDLESTATE_LOW);
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/**************************/
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/* TIM3 interrupts set-up */
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/**************************/
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/* Enable the capture/compare interrupt for channel 1 */
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LL_TIM_EnableIT_CC1(TIM3);
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/**************************/
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/* Start pulse generation */
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/**************************/
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/* Enable channel 1 */
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LL_TIM_CC_EnableChannel(TIM3, LL_TIM_CHANNEL_CH1);
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/* Enable TIM3 outputs */
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LL_TIM_EnableAllOutputs(TIM3);
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/* Enable auto-reload register preload */
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LL_TIM_EnableARRPreload(TIM3);
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/* Force update generation */
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LL_TIM_GenerateEvent_UPDATE(TIM3);
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}
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/**
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* @brief This function configures TIM2 to generate a positive pulse on OC1
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* with a length of 3 s and after a delay of 2 s as soon as a positive
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* edge is detected on the TI2 input pin.
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* @param None
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* @retval None
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*/
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__STATIC_INLINE void ConfigureTIMOnePulse_TI2Trigger(void)
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{
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uint32_t TIM2_clk;
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/******************************/
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/* Peripheral clocks enabling */
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/******************************/
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/* Enable the peripheral clock of GPIOs */
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LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_GPIOA);;
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/* Enable the peripheral clock of TIM2 */
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LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_TIM2);
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/*************************/
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/* GPIO AF configuration */
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/*************************/
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/* GPIO TIM2_CH1 configuration */
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LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_0, LL_GPIO_MODE_ALTERNATE);
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LL_GPIO_SetPinPull(GPIOA, LL_GPIO_PIN_0, LL_GPIO_PULL_DOWN);
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LL_GPIO_SetPinSpeed(GPIOA, LL_GPIO_PIN_0, LL_GPIO_SPEED_FREQ_HIGH);
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/* GPIO TIM2_CH2 configuration */
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LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_1, LL_GPIO_MODE_ALTERNATE);
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LL_GPIO_SetPinPull(GPIOA, LL_GPIO_PIN_1, LL_GPIO_PULL_DOWN);
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LL_GPIO_SetPinSpeed(GPIOA, LL_GPIO_PIN_1, LL_GPIO_SPEED_FREQ_HIGH);
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/*******************************/
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/* Input trigger configuration */
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/*******************************/
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/* Map TI2FP2 on TI2 */
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LL_TIM_IC_SetActiveInput(TIM2, LL_TIM_CHANNEL_CH2, LL_TIM_ACTIVEINPUT_DIRECTTI);
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/* TI2FP2 must detect a rising edge */
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LL_TIM_IC_SetPolarity(TIM2, LL_TIM_CHANNEL_CH2, LL_TIM_IC_POLARITY_RISING);
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/* Configure TI2FP2 as trigger */
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LL_TIM_SetTriggerInput(TIM2, LL_TIM_TS_TI2FP2);
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/* Enable the slave mode controller: TI2FP2 is used to start the counter */
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LL_TIM_SetSlaveMode(TIM2, LL_TIM_SLAVEMODE_TRIGGER);
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/*********************************/
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/* Output waveform configuration */
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/*********************************/
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/* Select counter mode: counting up */
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LL_TIM_SetCounterMode(TIM2, LL_TIM_COUNTERMODE_UP);
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/* Set the one pulse mode: generate only 1 pulse */
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LL_TIM_SetOnePulseMode(TIM2, LL_TIM_ONEPULSEMODE_SINGLE);
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/* In this example TIM2 input clock (TIM2CLK) is set to APB1 clock (PCLK1), */
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/* since APB1 pre-scaler is equal to 1. */
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/* TIM2CLK = PCLK1 */
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/* PCLK1 = HCLK */
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/* => TIM2CLK = SystemCoreClock (72 MHz) */
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TIM2_clk = SystemCoreClock/1;
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/* Set the TIM2 prescaler to get counter clock frequency at 2 kHz */
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LL_TIM_SetPrescaler(TIM2, __LL_TIM_CALC_PSC(TIM2_clk, 2000));
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/* Set the capture/compare register to get a pulse delay of 2s (2000000 us)*/
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LL_TIM_OC_SetCompareCH1(TIM2, __LL_TIM_CALC_DELAY(TIM2_clk, LL_TIM_GetPrescaler(TIM2), 2000000));
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/* Set the autoreload register to get a pulse length of 3s (3000000 us)*/
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LL_TIM_SetAutoReload(TIM2, __LL_TIM_CALC_PULSE(TIM2_clk, LL_TIM_GetPrescaler(TIM2), 2000000, 3000000));
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/* Set output channel 1 in PWM2 mode */
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LL_TIM_OC_SetMode(TIM2, LL_TIM_CHANNEL_CH1, LL_TIM_OCMODE_PWM2);
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/* Configure output channel 1 configuration */
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LL_TIM_OC_ConfigOutput(TIM2, LL_TIM_CHANNEL_CH1, LL_TIM_OCPOLARITY_HIGH | LL_TIM_OCIDLESTATE_LOW);
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/**************************/
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/* Start pulse generation */
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/**************************/
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/* Enable channel 1 */
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LL_TIM_CC_EnableChannel(TIM2, LL_TIM_CHANNEL_CH1);
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/* Enable auto-reload register preload */
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LL_TIM_EnableARRPreload(TIM2);
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/* Force update generation */
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LL_TIM_GenerateEvent_UPDATE(TIM2);
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}
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/**
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* @brief Configures User push-button in GPIO or EXTI Line Mode.
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* @param None
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* @retval None
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*/
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__STATIC_INLINE void UserButton_Init(void)
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{
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/* Enable the BUTTON Clock */
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USER_BUTTON_GPIO_CLK_ENABLE();
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/* Configure GPIO for BUTTON */
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LL_GPIO_SetPinMode(USER_BUTTON_GPIO_PORT, USER_BUTTON_PIN, LL_GPIO_MODE_INPUT);
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/* Connect External Line to the GPIO*/
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USER_BUTTON_SYSCFG_SET_EXTI();
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/* Enable a rising trigger EXTI line 13 Interrupt */
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USER_BUTTON_EXTI_LINE_ENABLE();
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USER_BUTTON_EXTI_FALLING_TRIG_ENABLE();
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/* Configure NVIC for USER_BUTTON_EXTI_IRQn */
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NVIC_EnableIRQ(USER_BUTTON_EXTI_IRQn);
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NVIC_SetPriority(USER_BUTTON_EXTI_IRQn,0x03);
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}
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/**
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* @brief System Clock Configuration
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* The system Clock is configured as follow :
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* System Clock source = PLL (HSE)
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* SYSCLK(Hz) = 72000000
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* HCLK(Hz) = 72000000
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* AHB Prescaler = 1
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* APB1 Prescaler = 2
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* APB2 Prescaler = 1
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* HSE Frequency(Hz) = 8000000
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* PLLMUL = 9
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* Flash Latency(WS) = 2
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* @param None
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* @retval None
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*/
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void SystemClock_Config(void)
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{
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/* Set FLASH latency */
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LL_FLASH_SetLatency(LL_FLASH_LATENCY_2);
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/* Enable HSE oscillator */
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LL_RCC_HSE_EnableBypass();
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LL_RCC_HSE_Enable();
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while(LL_RCC_HSE_IsReady() != 1)
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{
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};
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/* Main PLL configuration and activation */
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LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSE_DIV_1, LL_RCC_PLL_MUL_9);
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LL_RCC_PLL_Enable();
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while(LL_RCC_PLL_IsReady() != 1)
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{
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};
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/* Sysclk activation on the main PLL */
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LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
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LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL);
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while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL)
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{
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};
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/* Set APB1 & APB2 prescaler*/
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LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_2);
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LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
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/* Set systick to 1ms in using frequency set to 72MHz */
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LL_Init1msTick(72000000);
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/* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */
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LL_SetSystemCoreClock(72000000);
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}
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/******************************************************************************/
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/* USER IRQ HANDLER TREATMENT */
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/******************************************************************************/
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/**
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* @brief User button interrupt processing
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* @note TIM3 counter is enabled every time the user button is presssed.
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* @param None
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* @retval None
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*/
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void UserButton_Callback(void)
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{
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/* Enable counter. Note that the counter will stop automatically at the */
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/* next update event (UEV). */
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LL_TIM_EnableCounter(TIM3);
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}
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/**
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* @brief Timer capture/compare interrupt processing
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* @note Calculates the pulse delay and pulse length of the output waveform
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* generated by TIM3.
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* @param None
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* @retval None
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*/
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void TimerCaptureCompare_Callback(void)
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{
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uint32_t CNT;
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uint32_t PSC;
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uint32_t ARR;
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CNT = LL_TIM_GetCounter(TIM3);
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PSC = LL_TIM_GetPrescaler(TIM3);
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ARR = LL_TIM_GetAutoReload(TIM3);
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uwMeasuredDelay = (CNT * 1000000)/(SystemCoreClock/(PSC + 1));
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uwMeasuredPulseLength = ((ARR - CNT) * 1000000)/(SystemCoreClock/(PSC + 1));
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}
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#ifdef USE_FULL_ASSERT
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/**
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* @brief Reports the name of the source file and the source line number
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* where the assert_param error has occurred.
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* @param file: pointer to the source file name
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* @param line: assert_param error line source number
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* @retval None
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*/
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void assert_failed(uint8_t *file, uint32_t line)
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{
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/* User can add his own implementation to report the file name and line number,
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ex: printf("Wrong parameters value: file %s on line %d", file, line) */
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/* Infinite loop */
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while (1)
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{
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}
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}
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#endif
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/**
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* @}
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*/
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/**
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* @}
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*/
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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