关于输出比较产生特定占空比、相位差方波的问题

daitouweini · 发表于 4 天前

大佬们，我在论坛上面看到一篇关于设置相位差的文章，就准备复现一下。
这篇文章：http://www.openedv.com/forum.php?mod=viewthread&tid=296687&highlight=%CF%E0%CE%BB%B2%EE我是准备输出四路占空比、相位差固定的脉冲，周期2us。但是最后输出结果周期快3us了，占空比和冲相位差也和自己预想的不一样，
代码来来回回改了好多遍，也没有找到问题，各位大佬能不能看看我的配置哪方面不对。
代码如下：
#include "./SYSTEM/delay/delay.h"
#include "stm32h750xx.h"
GPIO_InitTypeDef gpio_init_struct = {0};//初始化GPIO的结构体
TIM_HandleTypeDef g_tim6_int_handle = {0};//初始化定时器6的结构体
TIM_HandleTypeDef g_tim3_int_handle = {0};//初始化定时器3的结构体
TIM_OC_InitTypeDef tim3_oc_pwm_struct = {0};//定时器3通道配置
//设置标志位
uint8_t TIM3_CH1_Flag = 0;
uint8_t TIM3_CH2_Flag = 0;
uint8_t TIM3_CH3_Flag = 0;
uint8_t TIM3_CH4_Flag = 0;
void Mohe_init(void)
{

//GPIO初始化
//开启GPIO端口时钟
S_TOTAL_GPIO_CLK_ENABLE();

gpio_init_struct.Pin = S1_GPIO_PIN | S2_GPIO_PIN | S3_GPIO_PIN | S4_GPIO_PIN;
gpio_init_struct.Mode = GPIO_MODE_AF_PP;
gpio_init_struct.Pull = GPIO_NOPULL;//输出可以不设置上拉下拉
gpio_init_struct.Speed = GPIO_SPEED_FREQ_MEDIUM;
gpio_init_struct.Alternate = GPIO_AF2_TIM3;
HAL_GPIO_Init(S_TOTAL_GPIO_PORT, &gpio_init_struct);

TIM3_CLK_ENABLE();//开启定时器时钟
g_tim3_int_handle.Instance = TIM3;
g_tim3_int_handle.Init.Prescaler = 1 - 1;                      /* 预分频系数 */
g_tim3_int_handle.Init.CounterMode = TIM_COUNTERMODE_UP; /* 计数模式 */
g_tim3_int_handle.Init.Period = 65535;                   /* 重装载值 */
g_tim3_int_handle.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;//不分频
g_tim3_int_handle.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;//自动重载值不使能
HAL_TIM_OC_Init(&g_tim3_int_handle);                   /* 定时器初始化 */
// __HAL_TIM_ENABLE_IT(&g_tim3_int_handle, TIM_IT_UPDATE);                               /* 使能定时器更新中断 */
HAL_NVIC_SetPriority(TIM3_IRQn, 0, 0); /* 配置中断优先级并使能中断 */
HAL_NVIC_EnableIRQ(TIM3_IRQn);
//定时器3的通道
//TIM_CHANNEL_1
tim3_oc_pwm_struct.OCMode = TIM_OCMODE_TOGGLE;                                           /* 输出翻转模式 */
tim3_oc_pwm_struct.Pulse = 1 - 1 + 96;    //crr不能超过arr                                        /* 占空比 */
tim3_oc_pwm_struct.OCPolarity = TIM_OCPOLARITY_LOW;                                  /* 有效电平 */
tim3_oc_pwm_struct.OCFastMode = TIM_OCFAST_DISABLE;
HAL_TIM_OC_ConfigChannel(&g_tim3_int_handle, &tim3_oc_pwm_struct, TIM_CHANNEL_1);  /* 配置定时器PWM通道 */
HAL_TIM_OC_Start_IT(&g_tim3_int_handle, TIM_CHANNEL_1);
//TIM_CHANNEL_2

tim3_oc_pwm_struct.OCMode = TIM_OCMODE_TOGGLE;                                           /* 输出翻转模式 */
tim3_oc_pwm_struct.Pulse = 109 - 1 + 96;    //crr不能超过arr                                        /* 占空比 */
tim3_oc_pwm_struct.OCPolarity = TIM_OCPOLARITY_LOW;                                  /* 有效电平 */
tim3_oc_pwm_struct.OCFastMode = TIM_OCFAST_DISABLE;
HAL_TIM_OC_ConfigChannel(&g_tim3_int_handle, &tim3_oc_pwm_struct, TIM_CHANNEL_2);  /* 配置定时器PWM通道 */
HAL_TIM_OC_Start_IT(&g_tim3_int_handle, TIM_CHANNEL_2);
//TIM_CHANNEL_3

tim3_oc_pwm_struct.OCMode = TIM_OCMODE_TOGGLE;                                           /* 输出翻转模式 */
tim3_oc_pwm_struct.Pulse = 217 - 1 + 96;    //crr不能超过arr                                        /* 占空比 */
tim3_oc_pwm_struct.OCPolarity = TIM_OCPOLARITY_LOW;                                  /* 有效电平 */
tim3_oc_pwm_struct.OCFastMode = TIM_OCFAST_DISABLE;
HAL_TIM_OC_ConfigChannel(&g_tim3_int_handle, &tim3_oc_pwm_struct, TIM_CHANNEL_3);  /* 配置定时器PWM通道 */
HAL_TIM_OC_Start_IT(&g_tim3_int_handle, TIM_CHANNEL_3);
//TIM_CHANNEL_4

tim3_oc_pwm_struct.OCMode = TIM_OCMODE_TOGGLE;                                           /* 输出翻转模式 */
tim3_oc_pwm_struct.Pulse = 325 - 1 + 96;                                                                                                             - 1;    //crr不能超过arr                                        /* 占空比 */
tim3_oc_pwm_struct.OCPolarity = TIM_OCPOLARITY_LOW;                                  /* 有效电平 */
tim3_oc_pwm_struct.OCFastMode = TIM_OCFAST_DISABLE;
HAL_TIM_OC_ConfigChannel(&g_tim3_int_handle, &tim3_oc_pwm_struct, TIM_CHANNEL_4);  /* 配置定时器PWM通道 */
HAL_TIM_OC_Start_IT(&g_tim3_int_handle, TIM_CHANNEL_4);
}
//定时器3中断服务函数
void TIM3_IRQHandler(void)//定时器中断服务函数
{
HAL_TIM_IRQHandler(&g_tim3_int_handle);
}
//定时器回调函数
void HAL_TIM_OC_DelayElapsedCallback(TIM_HandleTypeDef *htim)//定时器回调函数
{
uint32_t current_cnt = g_tim3_int_handle.Instance->CNT;
uint32_t next_crr;
if(htim->Instance == TIM3)
{
if(htim->Channel == HAL_TIM_ACTIVE_CHANNEL_1)
{
TIM3_CH1_Flag = !TIM3_CH1_Flag;
next_crr = current_cnt + (TIM3_CH1_Flag ? 96 : 384);
if(next_crr>65535)
{
next_crr -= 65536;
}
__HAL_TIM_SET_COMPARE(&g_tim3_int_handle, TIM_CHANNEL_1, next_crr);
}
else if(htim->Channel == HAL_TIM_ACTIVE_CHANNEL_2)
{
TIM3_CH2_Flag = !TIM3_CH2_Flag;
next_crr = current_cnt + (TIM3_CH2_Flag ? 96 : 384);
if(next_crr>65535)
{
next_crr -= 65536;
}
__HAL_TIM_SET_COMPARE(&g_tim3_int_handle, TIM_CHANNEL_2, next_crr);
}
else if(htim->Channel == HAL_TIM_ACTIVE_CHANNEL_3)
{
TIM3_CH3_Flag = !TIM3_CH3_Flag;
next_crr = current_cnt + (TIM3_CH3_Flag ? 96 : 384);
if(next_crr>65535)
{
next_crr -= 65536;
}
__HAL_TIM_SET_COMPARE(&g_tim3_int_handle, TIM_CHANNEL_3, next_crr);
}
else if(htim->Channel == HAL_TIM_ACTIVE_CHANNEL_4)
{
TIM3_CH4_Flag = !TIM3_CH4_Flag;
next_crr = current_cnt + (TIM3_CH4_Flag ? 96 : 384);
if(next_crr>65535)
{
next_crr -= 65536;
}
__HAL_TIM_SET_COMPARE(&g_tim3_int_handle, TIM_CHANNEL_4, next_crr);
}
}
}