113 lines
4.3 KiB
C
113 lines
4.3 KiB
C
#include "stm32f10x_it.h"
|
||
#include "stm32f10x_tim.h"
|
||
#include <stdio.h>
|
||
#include <absacc.h>
|
||
extern u16 all_data[];
|
||
|
||
void TIM3_GPIO_Config(void)
|
||
{
|
||
GPIO_InitTypeDef GPIO_Initstructure;
|
||
/* ---------------------------------------------------------------
|
||
使能TIM3时钟
|
||
PCLK1经过2倍频后作为TIM3的时钟源等于72MHz
|
||
--------------------------------------------------------------- */
|
||
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
|
||
|
||
/* GPIOA和GPIOB 时钟启动*/
|
||
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB, ENABLE);
|
||
|
||
GPIO_Initstructure.GPIO_Pin=GPIO_Pin_6|GPIO_Pin_7;
|
||
GPIO_Initstructure.GPIO_Mode=GPIO_Mode_AF_PP; //推挽式输出
|
||
GPIO_Initstructure.GPIO_Speed=GPIO_Speed_50MHz;
|
||
GPIO_Init(GPIOA,&GPIO_Initstructure);
|
||
|
||
GPIO_Initstructure.GPIO_Pin=GPIO_Pin_0|GPIO_Pin_1;
|
||
GPIO_Init(GPIOB,&GPIO_Initstructure);
|
||
}
|
||
|
||
void TIM3_Mode_Config(void)
|
||
{
|
||
/***************************************************************
|
||
TIM3配置：产生4路PWM信号与4个不同的工作周期：
|
||
TIM3时钟 = 72兆赫，分频器= 0x0，TIM3计数器时钟= 72兆赫
|
||
TIM3ARR寄存器= 999 = > TIM3频率= TIM3计数器时钟/（ARR + 1）
|
||
TIM3频率= 72 kHz。
|
||
****************************************************************/
|
||
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
|
||
TIM_OCInitTypeDef TIM_OCInitstructure;
|
||
|
||
// 自动重装载寄存器周期的值(定时时间)累计 0xFFFF个频率后产生个更新或者中断(也是说定时时间到)。
|
||
TIM_TimeBaseStructure.TIM_Period =65535;
|
||
//时钟预分频数 例如 ：时钟频率=72/(时钟预分频+1)
|
||
TIM_TimeBaseStructure.TIM_Prescaler = 0;
|
||
// 使用的采样频率之间的分频比例
|
||
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
|
||
//定时器模式向上计数。
|
||
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
|
||
|
||
//初始化定时器3
|
||
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
|
||
|
||
/**************配置为PWM比较输出模式****************************/
|
||
TIM_OCInitstructure.TIM_OCMode = TIM_OCMode_Toggle;
|
||
|
||
/* PWM1 Mode configuration: Channel1 */
|
||
TIM_OCInitstructure.TIM_OutputState=TIM_OutputState_Enable;
|
||
/*当定时器计数器的值小于CCR1_Va1是为高电频*/
|
||
TIM_OCInitstructure.TIM_OCPolarity=TIM_OCPolarity_High;
|
||
/*设置通道1跳变值，当计数器计数到这个值时，电平发生跳变*/
|
||
TIM_OCInitstructure.TIM_Pulse= 4000;
|
||
/*使用通道1*/
|
||
TIM_OC1Init(TIM3,&TIM_OCInitstructure);
|
||
|
||
/* PWM1 Mode configuration: Channel2 */
|
||
/*设置通道2跳变值，当计数器计数到这个值时，电平发生跳变*/
|
||
TIM_OCInitstructure.TIM_Pulse=100;
|
||
/*使用通道3*/
|
||
TIM_OC2Init(TIM3,&TIM_OCInitstructure);
|
||
|
||
/* PWM1 Mode configuration: Channel3 */
|
||
TIM_OCInitstructure.TIM_Pulse=1000;
|
||
/*使用通道3*/
|
||
TIM_OC3Init(TIM3,&TIM_OCInitstructure);
|
||
|
||
/* PWM1 Mode configuration: Channel4 */
|
||
/*设置通道2跳变值，当计数器计数到这个值时，电平发生跳变*/
|
||
TIM_OCInitstructure.TIM_Pulse=500;
|
||
/*使用通道4*/
|
||
TIM_OC4Init(TIM3,&TIM_OCInitstructure);
|
||
|
||
/*禁止预载寄存器*/
|
||
TIM_OC1PreloadConfig(TIM3,TIM_OCPreload_Disable);
|
||
TIM_OC2PreloadConfig(TIM3,TIM_OCPreload_Disable);
|
||
TIM_OC3PreloadConfig(TIM3,TIM_OCPreload_Disable);
|
||
TIM_OC4PreloadConfig(TIM3,TIM_OCPreload_Disable);
|
||
|
||
TIM_ITConfig(TIM3,TIM_IT_CC1|TIM_IT_CC2|TIM_IT_CC3|TIM_IT_CC4,ENABLE);
|
||
|
||
TIM_Cmd(TIM3, ENABLE); //使能定时器3
|
||
}
|
||
|
||
void TIM3_IRQHandler(void)//1ms产生一次中断信号
|
||
{
|
||
u16 Capture;
|
||
if(TIM_GetITStatus(TIM3, TIM_IT_CC1) == SET)
|
||
{
|
||
TIM_ClearITPendingBit(TIM3,TIM_IT_CC1);
|
||
Capture=TIM_GetCapture1(TIM3);
|
||
TIM_SetCompare1(TIM3,Capture+4000);
|
||
}
|
||
if(TIM_GetITStatus(TIM3, TIM_IT_CC2) == SET)
|
||
{
|
||
TIM_ClearITPendingBit(TIM3,TIM_IT_CC2);
|
||
Capture=TIM_GetCapture2(TIM3);
|
||
TIM_SetCompare2(TIM3,Capture+100);
|
||
}
|
||
}
|
||
|
||
void TIM3_PWM_Init(void)
|
||
{
|
||
TIM3_GPIO_Config();
|
||
TIM3_Mode_Config();
|
||
}
|