RGB LED¶
RGB LED 简介¶
为了更好地指示 MCU 状态，Node 上添加了一个外部 RGB LED，这对于 MCU 状态指示非常方便。RGB LED 连接到 MCU 的 GPIO 引脚，LED 的颜色可以由 MCU 控制。
RGB LED 工作原理¶
RGB LED 是三个 LED 的组合，每个 LED 都可以发出红、绿或蓝光。通过调整每个 LED 的亮度，RGB LED 可以发出各种颜色。RGB LED 连接到 MCU 的 GPIO 引脚，LED 的颜色可以由 MCU 控制。
RGB LED 硬件和连接¶
| RGB LED PIN | MCU PIN |
|---|---|
| GND | GND (or external GND) |
| R | PH13 |
| G | PH14 |
| B | PH15 |
源代码¶
led_rgb.h¶
/**
* @file led_rgb.h
* @author SHUAIWEN CUI (SHUAIWEN001 AT e DOT ntu DOT edu DOT sg)
* @brief This file is for RGB LED control function declaration.
* @version 1.0
* @date 2024-09-22
*
* @copyright Copyright (c) 2024
*
*/
#ifndef _LED_RGB_H_
#define _LED_RGB_H_
#include "stm32h7xx_hal.h" // HAL library file declaration, replace it with the corresponding file according to the actual situation
#include "main.h" // IO definition and initialization function are in the main.c file, must be referenced
void LED_RGB(int LED_R, int LED_G, int LED_B);
void LED_RGB_Toggle(void);
#endif /* _LED_RGB_H_ */
led_rgb.c¶
/**
* @file led_rgb.c
* @author SHUAIWEN CUI (SHUAIWEN001 AT e DOT ntu DOT edu DOT sg)
* @brief This file is for RGB LED control function declaration.
* @version 1.0
* @date 2024-09-22
*
* @copyright Copyright (c) 2024
*
*/
#include "led_rgb.h"
void LED_RGB(int LED_R, int LED_G, int LED_B) // LED RGB independent control function (0 is off, other values are on)
{
if (LED_R)
{
HAL_GPIO_WritePin(LED_R_GPIO_Port, LED_R_Pin, GPIO_PIN_SET);
}
else
{
HAL_GPIO_WritePin(LED_R_GPIO_Port, LED_R_Pin, GPIO_PIN_RESET);
}
if (LED_G)
{
HAL_GPIO_WritePin(LED_G_GPIO_Port, LED_G_Pin, GPIO_PIN_SET);
}
else
{
HAL_GPIO_WritePin(LED_G_GPIO_Port, LED_G_Pin, GPIO_PIN_RESET);
}
if (LED_B)
{
HAL_GPIO_WritePin(LED_B_GPIO_Port, LED_B_Pin, GPIO_PIN_SET);
}
else
{
HAL_GPIO_WritePin(LED_B_GPIO_Port, LED_B_Pin, GPIO_PIN_RESET);
}
}
void LED_RGB_Toggle(void)
{
int state_R = HAL_GPIO_ReadPin(LED_R_GPIO_Port, LED_R_Pin);
HAL_GPIO_WritePin(LED_R_GPIO_Port, LED_R_Pin, 1 - state_R);
int state_G = HAL_GPIO_ReadPin(LED_G_GPIO_Port, LED_G_Pin);
HAL_GPIO_WritePin(LED_G_GPIO_Port, LED_G_Pin, 1 - state_G);
int state_B = HAL_GPIO_ReadPin(LED_B_GPIO_Port, LED_B_Pin);
HAL_GPIO_WritePin(LED_B_GPIO_Port, LED_B_Pin, 1 - state_B);
}