/********************************** (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
 Output comparison mode routine:
 TIM1_CH1(PA8)
 This example demonstrates the output waveform of the TIM_CH1(PA8) pin in 4 output
 comparison modes. Output compare modes include OutCompare_Timing\OutCompare_Active\
 OutCompare_Inactive\OutCompare_Toggle.
 
*/

#include "debug.h"

/* Output Compare Mode Definition */
#define OutCompare_Timing   0
#define OutCompare_Active   1
#define OutCompare_Inactive 2
#define OutCompare_Toggle   3

/* Output Compare Mode Selection */
//#define OutCompare_MODE OutCompare_Timing
//#define OutCompare_MODE OutCompare_Active
//#define OutCompare_MODE OutCompare_Inactive
#define OutCompare_MODE OutCompare_Toggle

/*********************************************************************
 * @fn      TIM1_OutCompare_Init
 *
 * @brief   Initializes TIM1 output compare.
 *
 * @param   arr - the period value.
 *          psc - the prescaler value.
 *          ccp - the pulse value.
 *
 * @return  none
 */
void TIM1_OutCompare_Init( u16 arr, u16 psc, u16 ccp )
{
	GPIO_InitTypeDef GPIO_InitStructure={0};
	TIM_OCInitTypeDef TIM_OCInitStructure={0};
	TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure={0};

	RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA | RCC_APB2Periph_TIM1, ENABLE );

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	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( TIM1, &TIM_TimeBaseInitStructure);

#if (OutCompare_MODE == OutCompare_Timing)
	TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Timing;

#elif (OutCompare_MODE == OutCompare_Active)
	TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Active;

#elif (OutCompare_MODE == OutCompare_Inactive)
	TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Inactive;

#elif (OutCompare_MODE == OutCompare_Toggle)
	TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle;

#endif

	TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
	TIM_OCInitStructure.TIM_Pulse = ccp;
	TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
	TIM_OC1Init( TIM1, &TIM_OCInitStructure );

	TIM_CtrlPWMOutputs(TIM1, ENABLE );
	TIM_OC1PreloadConfig( TIM1, TIM_OCPreload_Disable );
	TIM_ARRPreloadConfig( TIM1, ENABLE );
	TIM_Cmd( TIM1, ENABLE );
}

/*********************************************************************
 * @fn      main
 *
 * @brief   Main program.
 *
 * @return  none
 */
int main(void)
{
	USART_Printf_Init(115200);
	SystemCoreClockUpdate();	
	printf("SystemClk:%d\r\n",SystemCoreClock);
	printf( "ChipID:%08x\r\n", DBGMCU_GetCHIPID() );
	TIM1_OutCompare_Init( 100, 48000-1, 50 );

	while(1);
}
