espurna-sonoff-pow/espurna/gpio.ino

40 lines
969 B
Arduino
Raw Permalink Normal View History

2018-06-06 15:28:17 +02:00
/*
GPIO MODULE
Copyright (C) 2017-2018 by Xose Pérez <xose dot perez at gmail dot com>
*/
unsigned int _gpio_locked = 0;
bool gpioValid(unsigned char gpio) {
if (gpio <= 5) return true;
if (12 <= gpio && gpio <= 15) return true;
return false;
}
bool gpioGetLock(unsigned char gpio) {
if (gpioValid(gpio)) {
unsigned int mask = 1 << gpio;
if ((_gpio_locked & mask) == 0) {
_gpio_locked |= mask;
DEBUG_MSG_P(PSTR("[GPIO] GPIO%u locked\n"), gpio);
return true;
}
}
DEBUG_MSG_P(PSTR("[GPIO] Failed getting lock for GPIO%u\n"), gpio);
return false;
}
bool gpioReleaseLock(unsigned char gpio) {
if (gpioValid(gpio)) {
unsigned int mask = 1 << gpio;
_gpio_locked &= ~mask;
DEBUG_MSG_P(PSTR("[GPIO] GPIO%u lock released\n"), gpio);
return true;
}
DEBUG_MSG_P(PSTR("[GPIO] Failed releasing lock for GPIO%u\n"), gpio);
return false;
}