stm32通过TMI2和tim3产生6路pwm波的源码

ID:267266 · 发表于 2017-12-26 18:06

单片机源程序如下:

#include "TIM_pwm_output.h"
/**
* @brief 配置TIM2和TIM3时复用输出PWM时用到的I/O
* @param 无
* @retval 无
*/
static void TIM_GPIO_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/*设置TIM2CLK和TIM3CLk 为72MHZ*/
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2|RCC_APB1Periph_TIM3, ENABLE);
/* GPIOA clock enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA , ENABLE);
/*GPIOA Configuration: TIM2 channel 1 2 3 4 6 and 7
as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1|
GPIO_Pin_2| GPIO_Pin_3|GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; // 复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
/**
* @brief 配置TIM2、TIM3输出的PWM信号的模式，如周期，极性，占空比
* @param 无
* @retval 无
*/
/*
* TIMxCLK/CK_PSC --> TIMxCNT --> TIMx_ARR --> TIMxCNT 重新计数
* TIMx_CCR(电平发生变化)
* 信号周期=(TIMx_ARR +1 ) * 时钟周期
* 占空比=TIMx_CCR/(TIMx_ARR +1)
*/
static void TIM_Mode_Config(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
/* 初始化PWM信号电平 */
u16 CCR1_Val = 0;
u16 CCR2_Val = 0;
u16 CCR3_Val = 0;
u16 CCR4_Val = 0;
u16 CCR5_Val = 0;
u16 CCR6_Val = 0;
/* Time base configuration */
TIM_TimeBaseStructure.TIM_Period = 999; //当定时器计数1000次，为一个周期
TIM_TimeBaseStructure.TIM_Prescaler = 5; //设置预分频，预分频为5，pwm频率为12KHZ
/* 设置时钟分频系数 */
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1 ;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数模式
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
/* PWM1 Mode configuration: Channel1 */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //配置为PWM模式1
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = CCR1_Val;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init(TIM2, &TIM_OCInitStructure); //使能通道1
TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Enable);
/* PWM1 Mode configuration: Channel2 */
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = CCR2_Val;
TIM_OC2Init(TIM2, &TIM_OCInitStructure); //使能通道2
TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Enable);
/* PWM1 Mode configuration: Channel3 */
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = CCR3_Val;
TIM_OC3Init(TIM2, &TIM_OCInitStructure); //使能通道3
TIM_OC3PreloadConfig(TIM2, TIM_OCPreload_Enable);
/* PWM1 Mode configuration: Channel4 */
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = CCR4_Val;
TIM_OC4Init(TIM2, &TIM_OCInitStructure); //使能通道4
TIM_OC4PreloadConfig(TIM2, TIM_OCPreload_Enable);
TIM_ARRPreloadConfig(TIM2, ENABLE); // 使能TIM2重载寄存器ARR
/* PWM1 Mode configuration: Channel5 */
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = CCR5_Val;
TIM_OC1Init(TIM3, &TIM_OCInitStructure); //使能通道5
TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);
/* PWM1 Mode configuration: Channel6 */
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = CCR6_Val;
TIM_OC2Init(TIM3, &TIM_OCInitStructure); //使能通道6
TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);
TIM_ARRPreloadConfig(TIM3, ENABLE); // 使能TIM3重载寄存器ARR
/* TIM2 and TIM3 enable counter */
TIM_Cmd(TIM2, ENABLE); //使能定时器2
TIM_Cmd(TIM3, ENABLE); //使能定时器3
}
void TIM_PWM_Init(void)//
{
TIM_GPIO_Config();
TIM_Mode_Config();
}
void TIM_PWM1_Update(double n)
{
u16 CCR1_Val = n*999;
TIM_SetCompare1(TIM2, CCR1_Val);
}
void TIM_PWM2_Update(double n)
{
u16 CCR2_Val = n*999;
TIM_SetCompare2(TIM2, CCR2_Val);
}
void TIM_PWM3_Update(double n)
{
u16 CCR3_Val = n*999;
TIM_SetCompare3(TIM2, CCR3_Val);
}
void TIM_PWM4_Update(double n)
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stm32通过TMI2和tim3产生6路pwm波的源码

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