#include "config.h" uint32_t PWM_Freq = 1; uint8_t PWM_Duty = 50; /****************************************************************************************** ** º¯ÊýÃû³Æ: PWM_Init ** º¯ÊýÃèÊö: PWM³õʼ»¯ ** ÊäÈë²ÎÊý: ÎÞ ** Êä³ö²ÎÊý: ÎÞ *******************************************************************************************/ void PWM_Init(void) { pwm_init(PWM_CHANNEL_0,PWM_Freq,PWM_Duty); pwm_start(PWM_CHANNEL_0);什么意思
时间: 2023-08-10 17:06:29 浏览: 39
这段代码是用于在单片机上初始化并启动PWM输出的功能。具体实现过程如下:
1. 首先定义了两个变量,分别为PWM_Freq和PWM_Duty,用于保存PWM的频率和占空比。
2. 接下来定义了一个名为PWM_Init的函数,用于初始化PWM输出。
3. 在函数中使用pwm_init函数初始化PWM通道0,设置PWM输出的频率为PWM_Freq,占空比为PWM_Duty。
4. 然后使用pwm_start函数启动PWM通道0的输出。
这段代码中使用了config.h头文件和pwm_init、pwm_start函数,这些函数的具体实现可能需要依赖于具体的单片机型号和开发环境。需要根据具体情况进行选择和调整。
相关问题
stm32f051c8t6 pwm
STM32F051C8T6是一款基于ARM Cortex-M0内核的微控制器,它可以用于各种应用,包括PWM控制。以下是一个简单的PWM示例代码,可以通过HAL库在STM32CubeIDE中编写和编译:
```c
#include "stm32f0xx_hal.h"
TIM_HandleTypeDef htim3;
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_TIM3_Init(void);
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_TIM3_Init();
HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_1);
while (1)
{
uint16_t duty_cycle = 0;
while (duty_cycle <= 1000)
{
__HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_1, duty_cycle);
duty_cycle += 10;
HAL_Delay(10);
}
}
}
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
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();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
Error_Handler();
}
}
static void MX_TIM3_Init(void)
{
TIM_OC_InitTypeDef sConfigOC = {0};
htim3.Instance = TIM3;
htim3.Init.Prescaler = 48000 - 1;
htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
htim3.Init.Period = 1000;
htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
if (HAL_TIM_PWM_Init(&htim3) != 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(&htim3, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
{
Error_Handler();
}
}
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
__HAL_RCC_GPIOA_CLK_ENABLE();
GPIO_InitStruct.Pin = GPIO_PIN_6;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF1_TIM3;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}
```
此代码将在PA6引脚上产生一个PWM信号,其占空比从0到100%变化。请注意,此示例仅使用了一个通道(通道1)和一个输出引脚(PA6),但您可以根据需要使用其他通道和引脚。
stm32pid温度控制pwm输出
以下是基于STM32F10x单片机实现的PID算法温度控制PWM输出的代码示例:
```c
#include "stm32f10x.h"
#include "PWMOUT.h"
#define PWM_PIN GPIO_Pin_0
#define PWM_PORT GPIOA
#define PWM_CLK RCC_APB2Periph_GPIOA
#define TEMP_PIN GPIO_Pin_1
#define TEMP_PORT GPIOA
#define TEMP_CLK RCC_APB2Periph_GPIOA
#define TEMP_ADC ADC1
#define TEMP_ADC_CLK RCC_APB2Periph_ADC1
#define TEMP_ADC_CHANNEL ADC_Channel_1
#define PWM_FREQ 1000 // PWM频率为1kHz
#define PWM_PERIOD 1000 // PWM周期为1ms
#define PWM_MAX_DUTY 900 // PWM最大占空比为90%
#define PWM_MIN_DUTY 100 // PWM最小占空比为10%
#define TEMP_SETPOINT 50 // 设定温度为50℃
#define KP 2.0 // 比例系数
#define KI 0.5 // 积分系数
#define KD 0.1 // 微分系数
volatile uint16_t temp_value = 0; // 温度传感器采集值
volatile uint16_t pwm_duty = 0; // PWM占空比
volatile float error = 0; // 误差
volatile float last_error = 0; // 上一次误差
volatile float integral = 0; // 积分项
volatile float derivative = 0; // 微分项
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(PWM_CLK, ENABLE);
GPIO_InitStructure.GPIO_Pin = PWM_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(PWM_PORT, &GPIO_InitStructure);
RCC_APB2PeriphClockCmd(TEMP_CLK, ENABLE);
GPIO_InitStructure.GPIO_Pin = TEMP_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(TEMP_PORT, &GPIO_InitStructure);
}
void ADC_Configuration(void)
{
ADC_InitTypeDef ADC_InitStructure;
RCC_APB2PeriphClockCmd(TEMP_ADC_CLK, ENABLE);
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 1;
ADC_Init(TEMP_ADC, &ADC_InitStructure);
ADC_RegularChannelConfig(TEMP_ADC, TEMP_ADC_CHANNEL, 1, ADC_SampleTime_239Cycles5);
ADC_Cmd(TEMP_ADC, ENABLE);
ADC_ResetCalibration(TEMP_ADC);
while(ADC_GetResetCalibrationStatus(TEMP_ADC));
ADC_StartCalibration(TEMP_ADC);
while(ADC_GetCalibrationStatus(TEMP_ADC));
}
void TIM_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
TIM_TimeBaseStructure.TIM_Period = PWM_PERIOD - 1;
TIM_TimeBaseStructure.TIM_Prescaler = SystemCoreClock / (PWM_FREQ * PWM_PERIOD) - 1;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
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_Cmd(TIM2, ENABLE);
}
void SysTick_Handler(void)
{
static uint16_t count = 0;
if(count++ >= 10) // 100ms采集一次温度
{
count = 0;
ADC_SoftwareStartConvCmd(TEMP_ADC, ENABLE);
while(!ADC_GetFlagStatus(TEMP_ADC, ADC_FLAG_EOC));
temp_value = ADC_GetConversionValue(TEMP_ADC);
error = TEMP_SETPOINT - temp_value;
integral += error;
derivative = error - last_error;
last_error = error;
pwm_duty = KP * error + KI * integral + KD * derivative;
if(pwm_duty > PWM_MAX_DUTY) pwm_duty = PWM_MAX_DUTY;
if(pwm_duty < PWM_MIN_DUTY) pwm_duty = PWM_MIN_DUTY;
TIM_SetCompare1(TIM2, pwm_duty);
}
}
int main(void)
{
GPIO_Configuration();
ADC_Configuration();
TIM_Configuration();
SysTick_Config(SystemCoreClock / 1000); // 1ms中断一次
while(1);
}
```
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