@ -6,19 +6,21 @@ Copyright (C) 2017-2019 by Xose Pérez <xose dot perez at gmail dot com>
*/
*/
unsigned int _gpio_locked = 0 ;
# include <bitset>
constexpr const size_t GPIO_PINS = 16 ;
std : : bitset < GPIO_PINS > _gpio_locked ;
std : : bitset < GPIO_PINS > _gpio_available ;
bool gpioValid ( unsigned char gpio ) {
bool gpioValid ( unsigned char gpio ) {
if ( gpio < = 5 ) return true ;
if ( 12 < = gpio & & gpio < = 15 ) return true ;
return false ;
return _gpio_available . test ( gpio ) ;
}
}
bool gpioGetLock ( unsigned char gpio ) {
bool gpioGetLock ( unsigned char gpio ) {
if ( gpioValid ( gpio ) ) {
if ( gpioValid ( gpio ) ) {
unsigned int mask = 1 < < gpio ;
if ( ( _gpio_locked & mask ) = = 0 ) {
_gpio_locked | = mask ;
if ( ! _gpio_locked . test ( gpio ) ) {
_gpio_locked . set ( gpio ) ;
DEBUG_MSG_P ( PSTR ( " [GPIO] GPIO%u locked \n " ) , gpio ) ;
DEBUG_MSG_P ( PSTR ( " [GPIO] GPIO%u locked \n " ) , gpio ) ;
return true ;
return true ;
}
}
@ -29,11 +31,36 @@ bool gpioGetLock(unsigned char gpio) {
bool gpioReleaseLock ( unsigned char gpio ) {
bool gpioReleaseLock ( unsigned char gpio ) {
if ( gpioValid ( gpio ) ) {
if ( gpioValid ( gpio ) ) {
unsigned int mask = 1 < < gpio ;
_gpio_locked & = ~ mask ;
_gpio_locked . reset ( gpio ) ;
DEBUG_MSG_P ( PSTR ( " [GPIO] GPIO%u lock released \n " ) , gpio ) ;
DEBUG_MSG_P ( PSTR ( " [GPIO] GPIO%u lock released \n " ) , gpio ) ;
return true ;
return true ;
}
}
DEBUG_MSG_P ( PSTR ( " [GPIO] Failed releasing lock for GPIO%u \n " ) , gpio ) ;
DEBUG_MSG_P ( PSTR ( " [GPIO] Failed releasing lock for GPIO%u \n " ) , gpio ) ;
return false ;
return false ;
}
}
void gpioSetup ( ) {
// https://github.com/espressif/esptool/blob/f04d34bcab29ace798d2d3800ba87020cccbbfdd/esptool.py#L1060-L1070
// "One or the other efuse bit is set for ESP8285"
// https://github.com/espressif/ESP8266_RTOS_SDK/blob/3c055779e9793e5f082afff63a011d6615e73639/components/esp8266/include/esp8266/efuse_register.h#L20-L21
// "define EFUSE_IS_ESP8285 (1 << 4)"
const uint32_t efuse_blocks [ 4 ] {
READ_PERI_REG ( 0x3ff00050 ) ,
READ_PERI_REG ( 0x3ff00054 ) ,
READ_PERI_REG ( 0x3ff00058 ) ,
READ_PERI_REG ( 0x3ff0005c )
} ;
const bool esp8285 = (
( efuse_blocks [ 0 ] & ( 1 < < 4 ) )
| | ( efuse_blocks [ 2 ] & ( 1 < < 16 ) )
) ;
for ( unsigned char pin = 0 ; pin < GPIO_PINS ; + + pin ) {
if ( pin < = 5 ) _gpio_available . set ( pin ) ;
if ( ( ( pin = = 9 ) | | ( pin = = 10 ) ) & & ( esp8285 ) ) _gpio_available . set ( pin ) ;
if ( 12 < = pin & & pin < = 15 ) _gpio_available . set ( pin ) ;
}
}