Tasmota/sonoff/core_esp8266_timer.c

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/*
timer.c - Timer1 library for esp8266
Copyright (c) 2015 Hristo Gochkov. All rights reserved.
This file is part of the esp8266 core for Arduino environment.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "wiring_private.h"
#include "pins_arduino.h"
#include "c_types.h"
#include "ets_sys.h"
// ------------------------------------------------------------------ -
// timer 1
static volatile timercallback timer1_user_cb = NULL;
void ICACHE_RAM_ATTR timer1_isr_handler(void *para){
(void) para;
if ((T1C & ((1 << TCAR) | (1 << TCIT))) == 0) TEIE &= ~TEIE1;//edge int disable
T1I = 0;
if (timer1_user_cb) {
// to make ISR compatible to Arduino AVR model where interrupts are disabled
// we disable them before we call the client ISR
uint32_t savedPS = xt_rsil(15); // stop other interrupts
timer1_user_cb();
xt_wsr_ps(savedPS);
}
}
void ICACHE_RAM_ATTR timer1_isr_init(){
ETS_FRC_TIMER1_INTR_ATTACH(timer1_isr_handler, NULL);
}
void timer1_attachInterrupt(timercallback userFunc) {
timer1_user_cb = userFunc;
ETS_FRC1_INTR_ENABLE();
}
void ICACHE_RAM_ATTR timer1_detachInterrupt() {
timer1_user_cb = 0;
TEIE &= ~TEIE1;//edge int disable
ETS_FRC1_INTR_DISABLE();
}
void timer1_enable(uint8_t divider, uint8_t int_type, uint8_t reload){
T1C = (1 << TCTE) | ((divider & 3) << TCPD) | ((int_type & 1) << TCIT) | ((reload & 1) << TCAR);
T1I = 0;
}
void ICACHE_RAM_ATTR timer1_write(uint32_t ticks){
T1L = ((ticks)& 0x7FFFFF);
if ((T1C & (1 << TCIT)) == 0) TEIE |= TEIE1;//edge int enable
}
void ICACHE_RAM_ATTR timer1_disable(){
T1C = 0;
T1I = 0;
}
//-------------------------------------------------------------------
// timer 0
static volatile timercallback timer0_user_cb = NULL;
void ICACHE_RAM_ATTR timer0_isr_handler(void* para){
(void) para;
if (timer0_user_cb) {
// to make ISR compatible to Arduino AVR model where interrupts are disabled
// we disable them before we call the client ISR
uint32_t savedPS = xt_rsil(15); // stop other interrupts
timer0_user_cb();
xt_wsr_ps(savedPS);
}
}
void timer0_isr_init(){
ETS_CCOMPARE0_INTR_ATTACH(timer0_isr_handler, NULL);
}
void timer0_attachInterrupt(timercallback userFunc) {
timer0_user_cb = userFunc;
ETS_CCOMPARE0_ENABLE();
}
void ICACHE_RAM_ATTR timer0_detachInterrupt() {
timer0_user_cb = NULL;
ETS_CCOMPARE0_DISABLE();
}