新手入门
- 积分
- 8
- 金钱
- 8
- 注册时间
- 2016-6-17
- 在线时间
- 6 小时
|
1金钱
#include "pwm.h"
//#include "led.h"
//#include "usart.h"
//////////////////////////////////////////////////////////////////////////////////
//±¾3ìDòÖ»1©Ñ§Ï°ê1óã¬Î′¾-×÷ÕßDí¿é£¬2»μÃóÃóúÆäËüèÎoÎóÃí¾
//ALIENTEK STM32F407¿a·¢°å
//¶¨ê±Æ÷PWM Çy¶ˉ′úÂë
//ÕyμãÔ-×ó@ALIENTEK
//¼¼êõÂÛì3:www.openedv.com
//′′½¨èÕÆú:2014/5/4
//°æ±¾£oV1.0
//°æè¨ËùóD£¬μá°æ±Ø¾¿¡£
//Copyright(C) 1ãÖYêDDÇòíμç×ó¿Æ¼¼óDÏT1«Ë¾ 2014-2024
//All rights reserved
//////////////////////////////////////////////////////////////////////////////////
//TIM14 PWM2¿·Ö3õê¼»ˉ
//PWMêä3ö3õê¼»ˉ
//arr£o×Ô¶ˉ֨װÖμ
//psc£oê±ÖóÔ¤·ÖÆμêy
void TIM3_PWM_Init(u16 arr,u16 psc)
{
//′Ë2¿·ÖDèêÖ¶ˉDT¸ÄIO¿úéèÖÃ
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE); //TIM3ê±Öóê1Äü
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE); //ê1ÄüPORTFê±Öó
GPIO_PinAFConfig(GPIOA,GPIO_PinSource6,GPIO_AF_TIM3); //GPIOA6¸′óÃÎa¶¨ê±Æ÷3
GPIO_PinAFConfig(GPIOA,GPIO_PinSource7,GPIO_AF_TIM3); //GPIOA6¸′óÃÎa¶¨ê±Æ÷3
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7; //GPIOB0|1
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //¸′óÃ1|Äü
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; //Ëù¶è100MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //íÆíì¸′óÃêä3ö
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //éÏà-
GPIO_Init(GPIOA,&GPIO_InitStructure); //3õê¼»ˉPF9
TIM_TimeBaseStructure.TIM_Prescaler=psc; //¶¨ê±Æ÷·ÖÆμ
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up; //ÏòéϼÆêyÄ£ê½
TIM_TimeBaseStructure.TIM_Period=arr; //×Ô¶ˉÖØ×°ÔØÖμ
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStructure);//3õê¼»ˉ¶¨ê±Æ÷3
//3õê¼»ˉTIM14 Channel1 PWMÄ£ê½
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //Ñ¡Ôñ¶¨ê±Æ÷Ä£ê½:TIMÂö3å¿í¶èμ÷ÖÆÄ£ê½2
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //±è½Ïêä3öê1Äü
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //êä3ö¼«DÔ:TIMêä3ö±è½Ï¼«DÔ¸ß
TIM_OC1Init(TIM3, &TIM_OCInitStructure); //¸ù¾YTÖ¸¶¨μÄ2Îêy3õê¼»ˉíaéèTIM3OC3
TIM_OC2Init(TIM3, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable); //ê1ÄüTIM3ÔúCCR1éÏμÄÔ¤×°ÔØ¼Ä′æÆ÷
TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);
TIM_ARRPreloadConfig(TIM3,ENABLE);//ARPEê1Äü
TIM_Cmd(TIM3, ENABLE); //ê1ÄüTIM3
通过这个方法分别改变两路输出的PWM占空比,在F103上实现了,为啥在F4上实现不了呢
TIM_SetCompare1(TIM3,2000); //DT¸Ä±è½ÏÖ죬DT¸ÄÕ¼¿Õ±è
TIM_SetCompare2(TIM3,10); //DT¸Ä±è½ÏÖ죬DT¸ÄÕ¼¿Õ±è
|
|