/********************************** (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
 Single pulse output routine:
 TIM2_CH1(PA0),TIM2_CH2(PA1)
 This routine demonstrates that in single-pulse mode, when a rising edge is detected
 on the TIM2_CH2(PA1) pin, the TIM2_CH1(PA0) outputs positive pulse.
 
*/
#include "debug.h"

/*********************************************************************
 * @fn      One_Pulse_Init
 *
 * @brief   Initializes TIM1 one pulse.
 *
 * @param   arr - the period value.
 *          psc - the prescaler value.
 *          ccp - the pulse value.
 *
 * @return  none
 */
void One_Pulse_Init(u16 arr, u16 psc, u16 ccp)
{
	GPIO_InitTypeDef GPIO_InitStructure={0};
	TIM_OCInitTypeDef TIM_OCInitStructure={0};
	TIM_ICInitTypeDef TIM_ICInitStructure={0};
	TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure={0};

	RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA, ENABLE );
	RCC_APB1PeriphClockCmd( RCC_APB1Periph_TIM2, ENABLE );

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init( GPIOA, &GPIO_InitStructure );

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
	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_TimeBaseInit( TIM2, &TIM_TimeBaseInitStructure);
	TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
	TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
	TIM_OCInitStructure.TIM_Pulse = ccp;
	TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
	TIM_OC1Init( TIM2, &TIM_OCInitStructure );

	TIM_ICStructInit( &TIM_ICInitStructure );
	TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;
	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_ICInit( TIM2, &TIM_ICInitStructure );
	TIM_SelectOnePulseMode( TIM2,TIM_OPMode_Single );
	TIM_SelectInputTrigger( TIM2, TIM_TS_TI2FP2 );
	TIM_SelectSlaveMode( TIM2, TIM_SlaveMode_Trigger );
}

/*********************************************************************
 * @fn      main
 *
 * @brief   Main program.
 *
 * @return  none
 */
int main(void)
{
	USART_Printf_Init(115200);
	printf("SystemClk:%d\r\n",SystemCoreClock);

	One_Pulse_Init( 200, 48000-1, 100 );

	while(1);
}


