| commit | author | age | ||
| d6b4a7 | 1 | /********************************************************************************* |
| G | 2 | * Copyright: (C) 2021 LingYun IoT System Studio |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * Filename: led.h | |
| 6 | * Description: This file is used to control RGB 3-colors LED | |
| 7 | * | |
| 8 | * | |
| 9 | * Pin connection: | |
| 10 | * RGB Led Module Raspberry Pi Board | |
| 11 | * R <-----> #Pin33(BCM GPIO13) | |
| 12 | * G <-----> #Pin35(BCM GPIO19) | |
| 13 | * B <-----> #Pin37(BCM GPIO26) | |
| 14 | * GND <-----> GND | |
| 15 | * | |
| 16 | * System install: | |
| 17 | * sudo apt install -y libgpiod-dev gpiod | |
| 18 | * | |
| 19 | * | |
| 20 | ********************************************************************************/ | |
| 21 | ||
| 22 | #ifndef _LEDS_H_ | |
| 23 | #define _LEDS_H_ | |
| 24 | ||
| 25 | #define ON 1 | |
| 26 | #define OFF 0 | |
| 27 | ||
| 28 | /* Three LEDs code */ | |
| 29 | enum | |
| 30 | { | |
| 31 | LED_R = 0, | |
| 32 | LED_G, | |
| 33 | LED_B, | |
| 34 | LED_CNT, | |
| 35 | }; | |
| 36 | ||
| 37 | /* Three LEDs hardware information */ | |
| 38 | typedef struct led_info_s | |
| 39 | { | |
| 40 | const char *name; /* RGB 3-color LED name */ | |
| 41 | int gpio; /* RGB 3-color LED BCM pin number */ | |
| 42 | int active;/* RGB 3-color LED active GPIO level: 0->low 1->high */ | |
| 43 | struct gpiod_line *line; /* libgpiod line */ | |
| 44 | } led_info_t; | |
| 45 | ||
| 46 | /* Three LEDs API context */ | |
| 47 | typedef struct led_ctx_s | |
| 48 | { | |
| 49 | struct gpiod_chip *chip; | |
| 50 | led_info_t *leds; | |
| 51 | int count; | |
| 52 | } led_ctx_t; | |
| 53 | ||
| 54 | extern int init_led(led_ctx_t *ctx, int which); | |
| 55 | extern int term_led(led_ctx_t *ctx, int which); | |
| 56 | extern int turn_led(int which, int cmd); | |
| 57 | ||
| 58 | #endif /* ----- #ifndef _LEDS_H_ ----- */ | |
