用HAL库实现PWM10KHZ
时间: 2024-06-01 12:03:38 浏览: 8
以下是使用HAL库在STM32上实现10KHZ PWM的示例代码:
首先,需要配置TIM(定时器)和GPIO(通用输入/输出)。
```c
TIM_HandleTypeDef htim;
TIM_OC_InitTypeDef sConfigOC;
GPIO_InitTypeDef GPIO_InitStruct;
/* Configure GPIO pin */
GPIO_InitStruct.Pin = GPIO_PIN_0;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* Configure TIM */
htim.Instance = TIM2;
htim.Init.Prescaler = 0;
htim.Init.CounterMode = TIM_COUNTERMODE_UP;
htim.Init.Period = 200;
htim.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
HAL_TIM_PWM_Init(&htim);
sConfigOC.OCMode = TIM_OCMODE_PWM1;
sConfigOC.Pulse = 100;
sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
HAL_TIM_PWM_ConfigChannel(&htim, &sConfigOC, TIM_CHANNEL_1);
```
在上面的代码中,我们使用了TIM2和PA0引脚。我们将PA0引脚配置为复用功能,并将其分配给TIM2。然后,我们使用HAL_TIM_PWM_Init()函数初始化TIM2为PWM模式,并使用HAL_TIM_PWM_ConfigChannel()函数配置PWM通道1的输出模式,极性和占空比。
接下来,我们可以使用HAL_TIM_PWM_Start()函数启动TIM2的PWM输出。
```c
HAL_TIM_PWM_Start(&htim, TIM_CHANNEL_1);
```
最后,我们可以使用HAL_TIM_PWM_Stop()函数停止PWM输出。
```c
HAL_TIM_PWM_Stop(&htim, TIM_CHANNEL_1);
```
完整的代码如下:
```c
#include "stm32f1xx_hal.h"
/* TIM_HandleTypeDef and TIM_OC_InitTypeDef are defined globally */
TIM_HandleTypeDef htim;
TIM_OC_InitTypeDef sConfigOC;
GPIO_InitTypeDef GPIO_InitStruct;
int main(void)
{
/* Initialize HAL library */
HAL_Init();
/* Configure GPIO pin */
GPIO_InitStruct.Pin = GPIO_PIN_0;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* Configure TIM */
htim.Instance = TIM2;
htim.Init.Prescaler = 0;
htim.Init.CounterMode = TIM_COUNTERMODE_UP;
htim.Init.Period = 200;
htim.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
HAL_TIM_PWM_Init(&htim);
sConfigOC.OCMode = TIM_OCMODE_PWM1;
sConfigOC.Pulse = 100;
sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
HAL_TIM_PWM_ConfigChannel(&htim, &sConfigOC, TIM_CHANNEL_1);
/* Start PWM output */
HAL_TIM_PWM_Start(&htim, TIM_CHANNEL_1);
while (1)
{
/* Do nothing */
}
}
```
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