基于NUCLEO-U575ZI-Q开发板实现使用PWM控制LED1亮度
时间: 2023-12-31 17:06:21 浏览: 163
好的,我可以为您提供基于NUCLEO-U575ZI-Q开发板实现使用PWM控制LED1亮度的代码示例。请按照以下步骤进行操作:
1. 打开STM32CubeIDE软件,创建一个新的工程。
2. 在工程配置向导中选择NUCLEO-U575ZI-Q作为目标板,选择相应的编译器。
3. 在工程中添加以下代码:
```
#include "main.h"
#include "stm32u5xx_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)
{
for (int i = 0; i <= 100; i++)
{
__HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_1, i);
HAL_Delay(10);
}
for (int i = 100; i >= 0; i--)
{
__HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_1, i);
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();
}
}
static void MX_TIM3_Init(void)
{
TIM_MasterConfigTypeDef sMasterConfig = {0};
TIM_OC_InitTypeDef sConfigOC = {0};
htim3.Instance = TIM3;
htim3.Init.Prescaler = 0;
htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
htim3.Init.Period = 100;
htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
if (HAL_TIM_PWM_Init(&htim3) != HAL_OK)
{
Error_Handler();
}
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&htim3, &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(&htim3, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
{
Error_Handler();
}
}
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
__HAL_RCC_GPIOH_CLK_ENABLE();
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_AF2_TIM3;
HAL_GPIO_Init(GPIOH, &GPIO_InitStruct);
}
void Error_Handler(void)
{
__disable_irq();
while (1)
{
}
}
```
4. 在工程中添加以下头文件:
```
#include "main.h"
#include "stm32u5xx_hal.h"
```
5. 在main函数中添加以下代码:
```
HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_1);
while (1)
{
for (int i = 0; i <= 100; i++)
{
__HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_1, i);
HAL_Delay(10);
}
for (int i = 100; i >= 0; i--)
{
__HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_1, i);
HAL_Delay(10);
}
}
```
6. 在MX_TIM3_Init函数中设置TIM3为PWM模式,并将GPIOH0引脚配置为TIM3的通道1。
7. 编译并下载程序到NUCLEO-U575ZI-Q开发板中。
这样就可以实现使用PWM控制LED1的亮度了。代码中的for循环会让LED1的亮度在0~100之间变化,每次变化的时间间隔为10ms。
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