| commit | author | age | ||
| d6b4a7 | 1 | /********************************************************************************* |
| G | 2 | * Copyright: (C) 2021 LingYun IoT System Studio |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * Filename: pwm.h | |
| 6 | * Description: This file is used to control PWM buzzer/Led | |
| 7 | * | |
| 8 | * Pin connection: | |
| 9 | * PWM Module Raspberry Pi Board | |
| 10 | * VCC <-----> 5V | |
| 11 | * buzzer <-----> #Pin32(BCM GPIO12) | |
| 12 | * Led <-----> #Pin33(BCM GPIO13) | |
| 13 | * GND <-----> GND | |
| 14 | * | |
| 15 | * /boot/config.txt: | |
| 16 | * | |
| 17 | * dtoverlay=pwm,pin=12,func=4 (Buzzer) | |
| 18 | * dtoverlay=pwm,pin=13,func=4 (Led) | |
| 19 | * | |
| 20 | ********************************************************************************/ | |
| 21 | ||
| 22 | ||
| 23 | #ifndef _PWM_H_ | |
| 24 | #define _PWM_H_ | |
| 25 | ||
| 26 | #define PWMCHIP_PATH "/sys/class/pwm/pwmchip0" | |
| 27 | ||
| 28 | #define ENABLE 1 | |
| 29 | #define DISABLE 0 | |
| 30 | ||
| 31 | #define CHN_BEEPER 0 | |
| 32 | #define FRQ_BEEPER 2700 | |
| 33 | ||
| 34 | #define CHN_RGBLED 1 | |
| 35 | #define FRQ_RGBLED 100 | |
| 36 | ||
| 37 | extern int init_pwm(int channel, int freq, int duty); | |
| 38 | extern int turn_pwm(int channel, int status); | |
| 39 | extern int term_pwm(int channel); | |
| 40 | ||
| 41 | extern int turn_beep(int times); | |
| 42 | ||
| 43 | #endif /* ----- #ifndef _PWM_H_ ----- */ | |
| 44 | ||
