#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 15:06:29 浏览: 114
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
STM32F407单片机用TIM4的通道一与通道二输出不同频率与占空比的pwm波,应该怎么写void TIM4_PWM_Init2(void)函数,给我详细代码以及解析
在STM32F407单片机上,使用TIM4的两个通道生成不同频率和占空比的PWM波,你需要配置TIM4的基本定时器、预分频器、PWM模式以及通道寄存器。下面是一个`TIM4_PWM_Init2`函数的示例代码,并附带了详细的解析:
```c
#include "stm32f4xx_hal.h"
// 定义两个结构体,用于存储不同通道的参数
typedef struct {
uint16_t freq;
uint8_t duty_cycle;
} PWMConfig;
// 函数声明
void TIM4_PWM_Init2(PWMConfig config1, PWMConfig config2);
// 实现函数
void TIM4_PWM_Init2(PWMConfig config1, PWMConfig config2)
{
// 初始化TIM4
TIM_HandleTypeDef htim4;
// 配置TIM4时钟源为APB1
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
// 清除中断标志并关闭计数器
htim4.Instance = TIM4;
__HAL_RCC_TIM4_CLK_ENABLE();
HAL_TIM_Base_Stop(&htim4);
HAL_TIM_Base_DeInit(&htim4);
// 设置TIM4的基本定时器配置
htim4.Init.Prescaler = 8399; // 根据系统时钟频率计算合适的值
htim4.Init.CounterMode = TIM_COUNTERMODE_UP;
htim4.Init.Period = (uint16_t)(HAL_RCC_GetPCLK2Freq() / (htim4.Init.Prescaler + 1) - config1.freq);
htim4.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
HAL_TIM_Base_Init(&htim4);
// 开启TIM4计数器
HAL_TIM_Base_Start(&htim4);
// 配置通道1
TIM_OC_InitTypeDef oc1cfg;
oc1cfg.OCMode = TIM_OCMODE_PWM1; // 输出模式为PWM
oc1cfg.OCPolarity = TIM_OCPOLARITY_HIGH; // 占空比高电平
oc1cfg.OCFastMode = DISABLE; // 正常速度
oc1cfg.OCPulse = (config1.duty_cycle * htim4.Init.Period) / 100; // 计算占空比时间
HAL_TIM_PWM_ConfigChannel(&htim4, &oc1cfg);
HAL_TIM_PWM_StartChannel(&htim4, TIM_CHANNEL_1);
// 配置通道2
TIM_OC_InitTypeDef oc2cfg;
oc2cfg.OCMode = TIM_OCMODE_PWM1; // 同样为PWM模式
oc2cfg.OCPolarity = TIM_OCPOLARITY_LOW; // 占空比低电平
oc2cfg.OCFastMode = DISABLE;
oc2cfg.OCPulse = (config2.duty_cycle * htim4.Init.Period) / 100; // 计算占空比时间
HAL_TIM_PWM_ConfigChannel(&htim4, &oc2cfg);
HAL_TIM_PWM_StartChannel(&htim4, TIM_CHANNEL_2);
// 打印配置信息
printf("Channel 1: Frequency %d Hz, Duty Cycle %d%%\n", config1.freq, config1.duty_cycle);
printf("Channel 2: Frequency %d Hz, Duty Cycle %d%%\n", config2.freq, config2.duty_cycle);
}
stm32配置生成波特率500K 标准帧,定时器1通道1生成的频率500HZ的PWM,当收到ID:110 数据:00 00 00 00 00 00 11时PWM输出10%的占空比,当收到ID:110 数据:00 00 00 00 00 00 12时PWM输出20%的占空比,当收到ID:110 数据:00 00 00 00 00 00 13时PWM输出30%的占空比,当收到ID:110 数据:00 00 00 00 00 00 14时PWM输出40%的占空比,当收到ID:110 数据:00 00 00 00 00 00 15时PWM输出50%的占空比,当收到ID:110 数据:00 00 00 00 00 00 16时PWM输出60%的占空比,当收到ID:110 数据:00 00 00 00 00 00 17时PWM输出70%的占空比,当收到ID:110 数据:00 00 00 00 00 00 18时PWM输出80%的占空比,当收到ID:110 数据:00 00 00 00 00 00 19时PWM输出90%的占空比,当收到ID:110 数据:00 00 00 00 00 00 10时PWM输出0%的占空比,当收到ID:110 数据:00 00 00 00 00 00 20时PWM输出100%的占空比的代码
以下是一个示例代码,用于在STM32上配置CAN总线和定时器1通道1生成PWM,并根据接收到的ID和数据来控制PWM的占空比。
```c
#include "stm32f4xx.h"
#include "stm32f4xx_hal.h"
CAN_HandleTypeDef hcan1;
TIM_HandleTypeDef htim1;
void SystemClock_Config(void);
void MX_GPIO_Init(void);
void MX_CAN1_Init(void);
void MX_TIM1_Init(void);
uint32_t pwm_duty_cycle = 0;
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_CAN1_Init();
MX_TIM1_Init();
while (1)
{
if (HAL_CAN_GetRxFifoFillLevel(&hcan1, CAN_RX_FIFO0))
{
CAN_RxHeaderTypeDef rx_header;
uint8_t rx_data[8];
HAL_CAN_GetRxMessage(&hcan1, CAN_RX_FIFO0, &rx_header, rx_data);
if (rx_header.StdId == 110)
{
if (rx_data[6] == 0x11)
pwm_duty_cycle = 10;
else if (rx_data[6] == 0x12)
pwm_duty_cycle = 20;
else if (rx_data[6] == 0x13)
pwm_duty_cycle = 30;
else if (rx_data[6] == 0x14)
pwm_duty_cycle = 40;
else if (rx_data[6] == 0x15)
pwm_duty_cycle = 50;
else if (rx_data[6] == 0x16)
pwm_duty_cycle = 60;
else if (rx_data[6] == 0x17)
pwm_duty_cycle = 70;
else if (rx_data[6] == 0x18)
pwm_duty_cycle = 80;
else if (rx_data[6] == 0x19)
pwm_duty_cycle = 90;
else if (rx_data[6] == 0x10)
pwm_duty_cycle = 0;
else if (rx_data[6] == 0x20)
pwm_duty_cycle = 100;
__HAL_TIM_SET_COMPARE(&htim1, TIM_CHANNEL_1, (pwm_duty_cycle * __HAL_TIM_GET_AUTORELOAD(&htim1)) / 100);
}
}
}
}
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_ClkInitTypeDef RCC_ClkInitStruct;
HAL_StatusTypeDef ret = HAL_OK;
__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;
ret = HAL_RCC_OscConfig(&RCC_OscInitStruct);
if (ret != HAL_OK)
while(1);
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;
ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0);
if (ret != HAL_OK)
while(1);
}
void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
__HAL_RCC_GPIOA_CLK_ENABLE();
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);
}
void MX_CAN1_Init(void)
{
hcan1.Instance = CAN1;
hcan1.Init.Prescaler = 4; // 配置波特率500K
hcan1.Init.Mode = CAN_MODE_NORMAL;
hcan1.Init.SyncJumpWidth = CAN_SJW_1TQ;
hcan1.Init.TimeSeg1 = CAN_BS1_11TQ;
hcan1.Init.TimeSeg2 = CAN_BS2_2TQ;
hcan1.Init.TimeTriggeredMode = DISABLE;
hcan1.Init.AutoBusOff = DISABLE;
hcan1.Init.AutoWakeUp = DISABLE;
hcan1.Init.AutoRetransmission = ENABLE;
hcan1.Init.ReceiveFifoLocked = DISABLE;
hcan1.Init.TransmitFifoPriority = DISABLE;
if (HAL_CAN_Init(&hcan1) != HAL_OK)
while(1);
CAN_FilterTypeDef can_filter;
can_filter.FilterBank = 0;
can_filter.FilterMode = CAN_FILTERMODE_IDMASK;
can_filter.FilterScale = CAN_FILTERSCALE_32BIT;
can_filter.FilterIdHigh = 0x0000;
can_filter.FilterIdLow = 0x0000;
can_filter.FilterMaskIdHigh = 0x0000;
can_filter.FilterMaskIdLow = 0x0000;
can_filter.FilterFIFOAssignment = CAN_RX_FIFO0;
can_filter.FilterActivation = ENABLE;
if (HAL_CAN_ConfigFilter(&hcan1, &can_filter) != HAL_OK)
while(1);
if (HAL_CAN_Start(&hcan1) != HAL_OK)
while(1);
if (HAL_CAN_ActivateNotification(&hcan1, CAN_IT_RX_FIFO0_MSG_PENDING) != HAL_OK)
while(1);
}
void MX_TIM1_Init(void)
{
TIM_MasterConfigTypeDef sMasterConfig;
TIM_OC_InitTypeDef sConfigOC;
__HAL_RCC_TIM1_CLK_ENABLE();
htim1.Instance = TIM1;
htim1.Init.Prescaler = (SystemCoreClock / 1000000) - 1; // 设置频率为500Hz
htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
htim1.Init.Period = 10000; // 设置计数器为10000,即PWM周期为500Hz
htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
if (HAL_TIM_PWM_Init(&htim1) != HAL_OK)
while(1);
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&htim1, &sMasterConfig) != HAL_OK)
while(1);
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)
while(1);
if (HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1) != HAL_OK)
while(1);
}
```
请注意,以上代码是一个简单的示例,仅供参考。您可能需要根据您的具体硬件和应用程序需求进行适当的修改。确保正确配置引脚、时钟和其他相关参数。
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