97 lines
3.3 KiB
C
97 lines
3.3 KiB
C
/********************************** (C) COPYRIGHT *******************************
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* File Name : main.c
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* Author : WCH
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* Version : V1.0.0
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* Date : 2023/12/29
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* Description : Main program body.
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*********************************************************************************
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* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
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* Attention: This software (modified or not) and binary are used for
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* microcontroller manufactured by Nanjing Qinheng Microelectronics.
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*******************************************************************************/
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/*
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*@Note
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*Input capture routine:
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*TIM1_CH1(PA8)
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*This example demonstrates the TIM_CH1(PA8) pin floating input, which detects an
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*edge transition to trigger a TIM1 capture interrupt,The rising edge triggers the
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*TIM_IT_CC1 interrupt, and the falling edge triggers the TIM_IT_CC2 interrupt.
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*
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*/
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#include "debug.h"
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/*********************************************************************
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* @fn Input_Capture_Init
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*
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* @brief Initializes TIM1 input capture.
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*
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* @param arr - the period value.
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* psc - the prescaler value.
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* ccp - the pulse value.
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*
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* @return none
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*/
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void Input_Capture_Init(u16 arr, u16 psc)
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{
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GPIO_InitTypeDef GPIO_InitStructure = {0};
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TIM_ICInitTypeDef TIM_ICInitStructure = {0};
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TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure = {0};
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NVIC_InitTypeDef NVIC_InitStructure = {0};
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_TIM1, ENABLE);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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GPIO_ResetBits(GPIOA, GPIO_Pin_8);
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TIM_TimeBaseInitStructure.TIM_Period = arr;
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TIM_TimeBaseInitStructure.TIM_Prescaler = psc;
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TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
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TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
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TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0x00;
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TIM_TimeBaseInit(TIM1, &TIM_TimeBaseInitStructure);
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TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
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TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
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TIM_ICInitStructure.TIM_ICFilter = 0x00;
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TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
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TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
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TIM_PWMIConfig(TIM1, &TIM_ICInitStructure);
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NVIC_InitStructure.NVIC_IRQChannel = TIM1_CC_IRQn;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStructure);
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TIM_ITConfig(TIM1, TIM_IT_CC1 | TIM_IT_CC2, ENABLE);
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TIM_SelectInputTrigger(TIM1, TIM_TS_TI1FP1);
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TIM_SelectSlaveMode(TIM1, TIM_SlaveMode_Reset);
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TIM_SelectMasterSlaveMode(TIM1, TIM_MasterSlaveMode_Enable);
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TIM_Cmd(TIM1, ENABLE);
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}
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/*********************************************************************
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* @fn main
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*
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* @brief Main program.
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*
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* @return none
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*/
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int main(void)
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{
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SystemCoreClockUpdate();
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USART_Printf_Init(115200);
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printf("SystemClk:%d\r\n", SystemCoreClock);
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printf( "ChipID:%08x\r\n", DBGMCU_GetCHIPID() );
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Input_Capture_Init(0xFFFF, 48000 - 1);
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while(1);
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}
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