96 lines
2.7 KiB
C
96 lines
2.7 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 : 2021/06/06
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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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PWM output routine:
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TIM1_CH1(PA8)
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This example demonstrates that the TIM_CH1(PA8) pin outputs PWM in PWM
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mode 1 and PWM mode 2.
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*/
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#include "debug.h"
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/* PWM Output Mode Definition */
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#define PWM_MODE1 0
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#define PWM_MODE2 1
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/* PWM Output Mode Selection */
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//#define PWM_MODE PWM_MODE1
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#define PWM_MODE PWM_MODE2
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/*********************************************************************
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* @fn TIM1_OutCompare_Init
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*
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* @brief Initializes TIM1 output compare.
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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 TIM1_PWMOut_Init(u16 arr, u16 psc, u16 ccp)
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{
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GPIO_InitTypeDef GPIO_InitStructure={0};
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TIM_OCInitTypeDef TIM_OCInitStructure={0};
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TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure={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_AF_PP;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init( GPIOA, &GPIO_InitStructure );
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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_TimeBaseInit( TIM1, &TIM_TimeBaseInitStructure);
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#if (PWM_MODE == PWM_MODE1)
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TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
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#elif (PWM_MODE == PWM_MODE2)
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TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
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#endif
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TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
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TIM_OCInitStructure.TIM_Pulse = ccp;
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TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
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TIM_OC1Init( TIM1, &TIM_OCInitStructure );
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TIM_CtrlPWMOutputs(TIM1, ENABLE );
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TIM_OC1PreloadConfig( TIM1, TIM_OCPreload_Disable );
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TIM_ARRPreloadConfig( TIM1, 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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USART_Printf_Init(115200);
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printf("SystemClk:%d\r\n",SystemCoreClock);
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TIM1_PWMOut_Init( 100, 48000-1, 50 );
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while(1);
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}
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