149 lines
4.2 KiB
C
149 lines
4.2 KiB
C
#include "Tim_Pwm.h"
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#include <stdio.h>
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#include "stm32f10x.h"
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#include "usart.h"
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void TIM_PWMGET(struct driver *self);
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void TIM_PWMGET_INIT(struct driver *self);
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const struct TIM_Get_PWM TIM2_PWM =
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{
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.GPIO_NUM = GPIO_Pin_15,
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.GPIO_Group = GPIOA,
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};
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U_BOOT_DRIVER(TIME2_PWM_CH2) = {
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.pdata =(void*)&TIM2_PWM,
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.Init =TIM_PWMGET_INIT,
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.ops = NULL
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};
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U_BOOT_DEVICE(TIME2_PWM_CH2) = {
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.name = "TIME2_PWM_CH2",
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.driver = &GetDRIVER_Name(TIME2_PWM_CH2),
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};
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volatile uint16_t pwmFrequency = 0;
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volatile uint16_t pwmDutyCycle = 0;
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void TIM_PWMGET_INIT(struct driver *self)
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{
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struct TIM_Get_PWM *Pdata_TIM = (struct TIM_Get_PWM*)self->pdata;
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GPIO_InitTypeDef GPIO_InitStructure;
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// 使能 TIM2 时钟
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
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// 使能 GPIOA 时钟
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
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// 配置 PA0 为 TIM2_CH1 输入
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GPIO_InitStructure.GPIO_Pin = Pdata_TIM->GPIO_NUM;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init(Pdata_TIM->GPIO_Group, &GPIO_InitStructure);
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TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
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TIM_ICInitTypeDef TIM_ICInitStructure;
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// 配置 TIM2 时基
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TIM_TimeBaseStructure.TIM_Period = 0xFFFF; // 最大计数值
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TIM_TimeBaseStructure.TIM_Prescaler = 72-1;
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TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
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TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
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TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
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// 配置 TIM2 通道1 为输入捕捉
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TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
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TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;//上升沿捕获
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TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;//直接输入模式
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TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
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TIM_ICInitStructure.TIM_ICFilter = 0x0;
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TIM_ICInit(TIM2, &TIM_ICInitStructure);
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// 配置 TIM2 通道2 为输入捕捉
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TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;
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TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Falling;//下降沿捕获
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TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_IndirectTI;//间接输入模式
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TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
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TIM_ICInitStructure.TIM_ICFilter = 0x0;
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TIM_ICInit(TIM2, &TIM_ICInitStructure);
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TIM_SelectInputTrigger(TIM2, TIM_TS_TI1FP1); // 使用通道1作为触发输入
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TIM_SelectSlaveMode(TIM2, TIM_SlaveMode_Reset); // 选择复位模式
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// // 配置 TIM2 主从模式（使能主从模式）
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// TIM_SelectMasterSlaveMode(TIM2, TIM_MasterSlaveMode_Enable);
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TIM2->SR = 0;
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TIM_ITConfig(TIM2, TIM_IT_CC1, ENABLE);
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TIM_ITConfig(TIM2, TIM_IT_CC2, ENABLE);
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// 配置 NVIC 中断优先级
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NVIC_InitTypeDef NVIC_InitStructure;
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NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStructure);
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// 使能 TIM2 输入捕捉中断
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// 清除 TIM2 的所有中断标志位
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// 使能 TIM2
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// TIM_Cmd(TIM2, ENABLE);
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}
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void Tim_DEVICE_INIT(struct udevice* self)
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{
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struct driver* Init_ops = (struct driver*)self->driver;
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if(!Init_ops->Init)
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return;
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Init_ops->Init(Init_ops);
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}
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void Init_Tim_PWM(void)
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{
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Tim_DEVICE_INIT(&GetDEVICE_Name(TIME2_PWM_CH2));
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}
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void Printf_Frequency()
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{
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printf("Frequency is %d\r\n",pwmFrequency);
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}
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void Printf_DutyCycle()
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{
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printf("DutyCycle is %d\r\n",pwmDutyCycle);
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}
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// TIM2 中断处理函数
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void TIM2_IRQHandler(void) {
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if (TIM_GetITStatus(TIM2, TIM_IT_CC1) != RESET) {
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// 读取捕捉寄存器的值
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// TIM_ITConfig(TIM2, TIM_IT_CC1, DISABLE);
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uint16_t capture = TIM_GetCapture1(TIM2);
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// printf("capture is %d\r\n",capture);
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// 计算PWM频率和占空比
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pwmFrequency = SystemCoreClock / capture;
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pwmDutyCycle = (TIM_GetCapture2(TIM2) * 100) / capture;
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// printf("pwmFrequency is %d\r\n",pwmFrequency);
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// printf("pwmDutyCycle is %d\r\n",pwmDutyCycle);
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// 清除中断标志
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TIM_ClearITPendingBit(TIM2, TIM_IT_CC1);
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}
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else if(TIM_GetITStatus(TIM2, TIM_IT_CC2) != RESET)
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{
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// TIM_ITConfig(TIM2, TIM_IT_CC2, DISABLE);
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TIM_ClearITPendingBit(TIM2, TIM_IT_CC2);
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}
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}
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