如何用keil看 pwm

在Keil中查看PWM（脉冲宽度调制）波形，通常需要以下几个步骤：

1. 软件准备：

确保你的Keil环境已经安装了正确的编译器和调试器。

如果是STM32系列微控制器，需要安装对应的HAL库。

2. 代码编写：

```c

include "stm32f10x.h"

void PWM_Config(void)

{

// 开启时钟

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

// GPIO配置

GPIO_InitTypeDef GPIO_InitStructure;

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; // PA0

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);

// 定时器配置

TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

TIM_TimeBaseStructure.TIM_Period = 999; // 自动重装载值

TIM_TimeBaseStructure.TIM_Prescaler = 72 1; // 预分频器

TIM_TimeBaseStructure.TIM_ClockDivision = 0;

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

// PWM模式配置

TIM_OCInitTypeDef TIM_OCInitStructure;

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;

TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;

TIM_OCInitStructure.TIM_Pulse = 499; // 占空比

TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

TIM_OC1Init(TIM2, &TIM_OCInitStructure);

// 使能定时器

TIM_Cmd(TIM2, ENABLE);