97 lines
3.3 KiB
C
97 lines
3.3 KiB
C
/********************************** (C) COPYRIGHT *******************************
|
|
* File Name : main.c
|
|
* Author : WCH
|
|
* Version : V1.0.0
|
|
* Date : 2021/06/06
|
|
* Description : Main program body.
|
|
*********************************************************************************
|
|
* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
|
|
* Attention: This software (modified or not) and binary are used for
|
|
* microcontroller manufactured by Nanjing Qinheng Microelectronics.
|
|
*******************************************************************************/
|
|
|
|
/*
|
|
*@Note
|
|
*Input capture routine:
|
|
*TIM1_CH1(PA8)
|
|
*This example demonstrates the TIM_CH1(PA8) pin floating input, which detects an
|
|
*edge transition to trigger a TIM1 capture interrupt,The rising edge triggers the
|
|
*TIM_IT_CC1 interrupt, and the falling edge triggers the TIM_IT_CC2 interrupt.
|
|
*
|
|
*/
|
|
|
|
#include "debug.h"
|
|
|
|
/*********************************************************************
|
|
* @fn Input_Capture_Init
|
|
*
|
|
* @brief Initializes TIM1 input capture.
|
|
*
|
|
* @param arr - the period value.
|
|
* psc - the prescaler value.
|
|
* ccp - the pulse value.
|
|
*
|
|
* @return none
|
|
*/
|
|
void Input_Capture_Init(u16 arr, u16 psc)
|
|
{
|
|
GPIO_InitTypeDef GPIO_InitStructure = {0};
|
|
TIM_ICInitTypeDef TIM_ICInitStructure = {0};
|
|
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure = {0};
|
|
NVIC_InitTypeDef NVIC_InitStructure = {0};
|
|
|
|
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_TIM1, ENABLE);
|
|
|
|
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
|
|
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
|
|
GPIO_Init(GPIOA, &GPIO_InitStructure);
|
|
GPIO_ResetBits(GPIOA, GPIO_Pin_8);
|
|
|
|
TIM_TimeBaseInitStructure.TIM_Period = arr;
|
|
TIM_TimeBaseInitStructure.TIM_Prescaler = psc;
|
|
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
|
|
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
|
|
TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0x00;
|
|
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseInitStructure);
|
|
|
|
TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
|
|
TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
|
|
TIM_ICInitStructure.TIM_ICFilter = 0x00;
|
|
TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
|
|
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
|
|
|
|
TIM_PWMIConfig(TIM1, &TIM_ICInitStructure);
|
|
|
|
NVIC_InitStructure.NVIC_IRQChannel = TIM1_CC_IRQn;
|
|
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
|
|
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
|
|
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
|
|
NVIC_Init(&NVIC_InitStructure);
|
|
|
|
TIM_ITConfig(TIM1, TIM_IT_CC1 | TIM_IT_CC2, ENABLE);
|
|
|
|
TIM_SelectInputTrigger(TIM1, TIM_TS_TI1FP1);
|
|
TIM_SelectSlaveMode(TIM1, TIM_SlaveMode_Reset);
|
|
TIM_SelectMasterSlaveMode(TIM1, TIM_MasterSlaveMode_Enable);
|
|
TIM_Cmd(TIM1, ENABLE);
|
|
}
|
|
|
|
/*********************************************************************
|
|
* @fn main
|
|
*
|
|
* @brief Main program.
|
|
*
|
|
* @return none
|
|
*/
|
|
int main(void)
|
|
{
|
|
SystemCoreClockUpdate();
|
|
USART_Printf_Init(115200);
|
|
printf("SystemClk:%d\r\n", SystemCoreClock);
|
|
printf( "ChipID:%08x\r\n", DBGMCU_GetCHIPID() );
|
|
|
|
Input_Capture_Init(0xFFFF, 48000 - 1);
|
|
|
|
while(1);
|
|
}
|