stm32cubemxpwm呼吸灯
时间: 2023-07-31 19:04:03 浏览: 93
LED -呼吸灯_呼吸灯_LED_STM32F103_
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好的,下面是使用STM32CubeMX配置PWM实现呼吸灯的步骤:
1. 打开STM32CubeMX,选择你的芯片型号,创建一个新工程。
2. 在Pinout选项卡中选择一个可用的GPIO引脚,右键单击该引脚,选择“PWM(TIMx_CHx)”选项,将其作为PWM输出引脚。
3. 在Configuration选项卡中,选择“TIMx”定时器,启用“PWM Generation”功能,并选择CHx作为PWM输出通道。
4. 在PWM Generation选项卡中,选择PWM的周期和占空比,可以设置为较小的周期和较小的占空比来实现呼吸灯效果。
5. 生成代码,打开生成的工程,在main函数中编写代码,使用HAL库的PWM函数控制PWM输出,实现呼吸灯效果。
以下是一个示例代码:
```
#include "main.h"
#include "stm32f4xx_hal.h"
TIM_HandleTypeDef htim1;
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_TIM1_Init(void);
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_TIM1_Init();
uint16_t pwm_value = 0;
uint16_t step = 10;
while (1)
{
pwm_value += step;
if (pwm_value >= TIM1->ARR)
{
pwm_value = 0;
}
TIM1->CCR1 = pwm_value;
HAL_Delay(10);
}
}
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
Error_Handler();
}
}
void MX_TIM1_Init(void)
{
TIM_MasterConfigTypeDef sMasterConfig = {0};
TIM_OC_InitTypeDef sConfigOC = {0};
htim1.Instance = TIM1;
htim1.Init.Prescaler = 0;
htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
htim1.Init.Period = 1000;
htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
htim1.Init.RepetitionCounter = 0;
if (HAL_TIM_PWM_Init(&htim1) != HAL_OK)
{
Error_Handler();
}
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&htim1, &sMasterConfig) != HAL_OK)
{
Error_Handler();
}
sConfigOC.OCMode = TIM_OCMODE_PWM1;
sConfigOC.Pulse = 0;
sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
{
Error_Handler();
}
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);
}
void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
__HAL_RCC_GPIOA_CLK_ENABLE();
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_8, GPIO_PIN_RESET);
GPIO_InitStruct.Pin = GPIO_PIN_8;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF1_TIM1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
```
这个代码使用TIM1_CH1作为PWM输出引脚,每隔10ms增加PWM占空比10,直到达到最大占空比1000,然后重新从0开始。你可以根据需要修改周期和占空比。
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