stm32两路互补pwm
时间: 2023-08-03 11:06:49 浏览: 138
在STM32芯片中,早期的型号(如STM32F1, STM32F2, STM32F3, STM32F4, STM32F7)没有具有互补PWM输出功能的TIM16和TIM17。[1]这是因为早期的IP Core存在缺陷,导致在应用多路互补PWM时存在问题。[2]然而,后来的型号(如STM32F0, STM32L, STM32H, STM32G0, STM32C0)增加了TIM16和TIM17,可以配置互补PWM输出。[1]通过使用高级定时器的TIMx_CHy和TIMx_CHyN通道,可以轻松实现互补PWM波形的输出,这对于驱动电机和全桥电路等应用非常有用。[3]
相关问题
stm32输出两路互补pwm波
要输出两路互补的PWM波,可以使用STM32的定时器和通道功能。
步骤如下:
1. 配置定时器
选择一个定时器(如TIM1),并配置其时钟源、预分频系数、计数器周期等参数。
2. 配置通道1和通道2
通道1和通道2分别控制输出PWM波的高电平时间和周期。可以选择输出模式为PWM模式1或2,也可以选择输出极性为正或负极性。需要将通道1和通道2配置为互补模式,以实现两路互补PWM波的输出。
3. 启动定时器
启动定时器,使其开始计数并输出PWM波。
下面是一个简单的示例代码,用于输出两路互补的PWM波:
```c
#include "stm32f10x.h"
void PWM_Init()
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
// 打开时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
// 配置定时器
TIM_TimeBaseStructure.TIM_Period = 999; // 计数器周期
TIM_TimeBaseStructure.TIM_Prescaler = 71; // 预分频系数
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
// 配置通道1
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; // PWM模式1
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 499; // 高电平时间
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; // 正极性
TIM_OC1Init(TIM1, &TIM_OCInitStructure);
// 配置通道2
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; // PWM模式1
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 500; // 高电平时间
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; // 负极性
TIM_OC2Init(TIM1, &TIM_OCInitStructure);
// 配置互补模式
TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_OFF;
TIM_BDTRInitStructure.TIM_DeadTime = 10; // 互补延迟时间
TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;
TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_Low;
TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);
// 启动定时器
TIM_Cmd(TIM1, ENABLE);
}
```
在上面的代码中,我们选择了TIM1作为定时器,并配置了其时钟源为APB2的时钟,预分频系数为71,计数器周期为999。我们也配置了通道1和通道2,以输出两路互补的PWM波。通道1的高电平时间为499,输出正极性的PWM波;通道2的高电平时间为500,输出负极性的PWM波。我们还配置了互补模式,以保证两路PWM波互补输出。最后,启动定时器,使其开始计数并输出PWM波。
注意:具体的参数配置需要根据具体的硬件电路和应用场景进行调整。
cubemx stm32输出两路互补pwm波
使用CubeMX配置STM32芯片可以实现输出两路互补PWM波。具体的配置参数如下:<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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