STM32TIM呼吸灯代码
时间: 2023-11-01 11:07:27 浏览: 46
基于STM32单片机设计的PWM的呼吸灯控制KEIL工程源代码可以通过引用中提供的代码实现。PWM信号是一种脉宽调制信号,广泛用于LED和电机控制等场合。PWM信号其实类似于方波,只有0和1两种状态。PWM信号可以调节占空比。不同占空比可以使LED产生不同亮度的效果,从而实现呼吸灯的效果。在代码中,可以通过调用TIM3_SetCompareValue函数来设置三个通道的占空比,从而控制RGB三个LED的亮度。具体实现可以参考引用和引用中提供的代码和函数。
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stm32呼吸灯代码
以下是一个基于STM32的呼吸灯代码示例:
```
#include "stm32f10x.h"
// 定义LED引脚
#define LED_PORT GPIOA
#define LED_PIN GPIO_Pin_1
// 初始化LED引脚为输出模式
void LED_GPIO_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = LED_PIN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(LED_PORT, &GPIO_InitStructure);
}
// 呼吸灯效果
void LED_Breath(void)
{
uint16_t i;
// 呼吸灯效果循环
while (1)
{
// 从0到100逐渐增加PWM占空比
for (i = 0; i < 100; i++)
{
TIM_SetCompare1(TIM2, i);
delay_ms(5);
}
// 从100到0逐渐减小PWM占空比
for (i = 100; i > 0; i--)
{
TIM_SetCompare1(TIM2, i);
delay_ms(5);
}
}
}
int main(void)
{
// 初始化LED引脚
LED_GPIO_Config();
// 初始化定时器2
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
TIM_TimeBaseStructure.TIM_Period = 99; // PWM周期为100
TIM_TimeBaseStructure.TIM_Prescaler = 71; // 时钟预分频为72
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
// 配置TIM2的通道1为PWM输出模式
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 0;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init(TIM2, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Enable);
TIM_Cmd(TIM2, ENABLE); // 启动TIM2
// 启动呼吸灯效果
LED_Breath();
return 0;
}
// 延时函数,单位ms
void delay_ms(uint16_t ms)
{
uint16_t i, j;
for (i = 0; i < ms; i++)
for (j = 0; j < 1000; j++);
}
```
该代码使用定时器2的PWM输出模式实现呼吸灯效果。首先定义LED引脚为PA1,初始化为输出模式,然后配置定时器2的通道1为PWM输出模式,设置PWM周期为100,时钟预分频为72。接着实现呼吸灯效果循环,在循环中从0到100逐渐增加PWM占空比,再从100到0逐渐减小PWM占空比,每次变化后延时5毫秒。最后,在main函数中启动定时器2和呼吸灯效果。
stm32pwm呼吸灯keil5代码
以下是使用Keil5编写的STM32 PWM呼吸灯的代码示例:
```c
#include "stm32f1xx_hal.h"
TIM_HandleTypeDef htim2;
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_TIM2_Init(void);
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_TIM2_Init();
HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_2);
uint16_t brightness = 0;
uint8_t direction = 1;
while (1)
{
__HAL_TIM_SET_COMPARE(&htim2, TIM_CHANNEL_2, brightness);
if (brightness == 0)
direction = 1;
else if (brightness == 1000)
direction = 0;
if (direction)
brightness++;
else
brightness--;
HAL_Delay(1);
}
}
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_ClkInitTypeDef RCC_ClkInitStruct;
__HAL_RCC_PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
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();
}
}
static void MX_TIM2_Init(void)
{
TIM_ClockConfigTypeDef sClockSourceConfig;
TIM_MasterConfigTypeDef sMasterConfig;
TIM_OC_InitTypeDef sConfigOC;
htim2.Instance = TIM2;
htim2.Init.Prescaler = 0;
htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
htim2.Init.Period = 1000;
htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
if (HAL_TIM_PWM_Init(&htim2) != HAL_OK)
{
Error_Handler();
}
sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)
{
Error_Handler();
}
if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_2) != 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(&htim2, &sConfigOC, TIM_CHANNEL_2) != HAL_OK)
{
Error_Handler();
}
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)
{
Error_Handler();
}
}
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
__HAL_RCC_GPIOA_CLK_ENABLE();
GPIO_InitStruct.Pin = GPIO_PIN_1;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
void Error_Handler(void)
{
while (1)
{
}
}
```