93 lines
3.0 KiB
C
93 lines
3.0 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
|
|
external trigger routines to start two timers synchronously:
|
|
TIM1_CH1(PA8)
|
|
This example demonstrates the TIM_CH1(PA8) pin pull-up input, the pin detects a
|
|
rising edge, then starts TIM1 and TIM2.
|
|
|
|
*/
|
|
|
|
#include "debug.h"
|
|
|
|
/*********************************************************************
|
|
* @fn ExtTrigger_Start_Two_TIM
|
|
*
|
|
* @brief Starting 2 timers synchronously in response to an external trigger.
|
|
*
|
|
* @param arr - the period value.
|
|
* psc - the prescaler value.
|
|
*
|
|
* @return none
|
|
*/
|
|
void ExtTrigger_Start_Two_TIM(u16 arr, u16 psc)
|
|
{
|
|
GPIO_InitTypeDef GPIO_InitStructure={0};
|
|
TIM_ICInitTypeDef TIM_ICInitStructure={0};
|
|
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure={0};
|
|
|
|
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA | RCC_APB2Periph_TIM1, ENABLE );
|
|
RCC_APB1PeriphClockCmd( RCC_APB1Periph_TIM2, ENABLE );
|
|
|
|
TIM_CounterModeConfig( TIM2, TIM_CounterMode_Up );
|
|
|
|
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
|
|
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
|
|
GPIO_Init( GPIOA, &GPIO_InitStructure);
|
|
|
|
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_Falling;
|
|
TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
|
|
TIM_ICInit( TIM1, &TIM_ICInitStructure );
|
|
|
|
TIM_SelectInputTrigger( TIM1, TIM_TS_TI1FP1 );
|
|
TIM_SelectSlaveMode( TIM1, TIM_SlaveMode_Trigger );
|
|
TIM_SelectMasterSlaveMode( TIM1, TIM_MasterSlaveMode_Enable );
|
|
TIM_SelectOutputTrigger( TIM1, TIM_TRGOSource_Enable );
|
|
TIM_SelectInputTrigger( TIM2, TIM_TS_ITR0 );
|
|
TIM_SelectSlaveMode( TIM2, TIM_SlaveMode_Trigger );
|
|
}
|
|
|
|
/*********************************************************************
|
|
* @fn main
|
|
*
|
|
* @brief Main program.
|
|
*
|
|
* @return none
|
|
*/
|
|
int main(void)
|
|
{
|
|
Delay_Init();
|
|
USART_Printf_Init(115200);
|
|
printf("SystemClk:%d\r\n",SystemCoreClock);
|
|
|
|
ExtTrigger_Start_Two_TIM( 0xFFFF, 48000-1);
|
|
|
|
while(1)
|
|
{
|
|
printf("TIM1 cnt:%d\r\n", TIM1->CNT);
|
|
printf("TIM2 cnt:%d\r\n", TIM2->CNT);
|
|
Delay_Ms(100);
|
|
}
|
|
}
|