mirror of https://github.com/arendst/Tasmota.git
189 lines
6.6 KiB
C
189 lines
6.6 KiB
C
/*
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digital.c - wiring digital implementation for esp8266
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Copyright (c) 2015 Hristo Gochkov. All rights reserved.
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This file is part of the esp8266 core for Arduino environment.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#define ARDUINO_MAIN
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#include "wiring_private.h"
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#include "pins_arduino.h"
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#include "c_types.h"
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#include "eagle_soc.h"
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#include "ets_sys.h"
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extern void pwm_stop_pin(uint8_t pin);
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uint8_t esp8266_gpioToFn[16] = {0x34, 0x18, 0x38, 0x14, 0x3C, 0x40, 0x1C, 0x20, 0x24, 0x28, 0x2C, 0x30, 0x04, 0x08, 0x0C, 0x10};
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extern void __pinMode(uint8_t pin, uint8_t mode) {
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pwm_stop_pin(pin);
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if(pin < 16){
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if(mode == SPECIAL){
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GPC(pin) = (GPC(pin) & (0xF << GPCI)); //SOURCE(GPIO) | DRIVER(NORMAL) | INT_TYPE(UNCHANGED) | WAKEUP_ENABLE(DISABLED)
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GPEC = (1 << pin); //Disable
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GPF(pin) = GPFFS(GPFFS_BUS(pin));//Set mode to BUS (RX0, TX0, TX1, SPI, HSPI or CLK depending in the pin)
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if(pin == 3) GPF(pin) |= (1 << GPFPU);//enable pullup on RX
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} else if(mode & FUNCTION_0){
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GPC(pin) = (GPC(pin) & (0xF << GPCI)); //SOURCE(GPIO) | DRIVER(NORMAL) | INT_TYPE(UNCHANGED) | WAKEUP_ENABLE(DISABLED)
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GPEC = (1 << pin); //Disable
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GPF(pin) = GPFFS((mode >> 4) & 0x07);
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if(pin == 13 && mode == FUNCTION_4) GPF(pin) |= (1 << GPFPU);//enable pullup on RX
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} else if(mode == OUTPUT || mode == OUTPUT_OPEN_DRAIN){
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GPF(pin) = GPFFS(GPFFS_GPIO(pin));//Set mode to GPIO
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GPC(pin) = (GPC(pin) & (0xF << GPCI)); //SOURCE(GPIO) | DRIVER(NORMAL) | INT_TYPE(UNCHANGED) | WAKEUP_ENABLE(DISABLED)
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if(mode == OUTPUT_OPEN_DRAIN) GPC(pin) |= (1 << GPCD);
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GPES = (1 << pin); //Enable
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} else if(mode == INPUT || mode == INPUT_PULLUP){
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GPF(pin) = GPFFS(GPFFS_GPIO(pin));//Set mode to GPIO
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GPEC = (1 << pin); //Disable
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GPC(pin) = (GPC(pin) & (0xF << GPCI)) | (1 << GPCD); //SOURCE(GPIO) | DRIVER(OPEN_DRAIN) | INT_TYPE(UNCHANGED) | WAKEUP_ENABLE(DISABLED)
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if(mode == INPUT_PULLUP) {
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GPF(pin) |= (1 << GPFPU); // Enable Pullup
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}
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} else if(mode == WAKEUP_PULLUP || mode == WAKEUP_PULLDOWN){
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GPF(pin) = GPFFS(GPFFS_GPIO(pin));//Set mode to GPIO
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GPEC = (1 << pin); //Disable
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if(mode == WAKEUP_PULLUP) {
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GPF(pin) |= (1 << GPFPU); // Enable Pullup
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GPC(pin) = (1 << GPCD) | (4 << GPCI) | (1 << GPCWE); //SOURCE(GPIO) | DRIVER(OPEN_DRAIN) | INT_TYPE(LOW) | WAKEUP_ENABLE(ENABLED)
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} else {
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GPF(pin) |= (1 << GPFPD); // Enable Pulldown
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GPC(pin) = (1 << GPCD) | (5 << GPCI) | (1 << GPCWE); //SOURCE(GPIO) | DRIVER(OPEN_DRAIN) | INT_TYPE(HIGH) | WAKEUP_ENABLE(ENABLED)
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}
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}
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} else if(pin == 16){
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GPF16 = GP16FFS(GPFFS_GPIO(pin));//Set mode to GPIO
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GPC16 = 0;
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if(mode == INPUT || mode == INPUT_PULLDOWN_16){
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if(mode == INPUT_PULLDOWN_16){
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GPF16 |= (1 << GP16FPD);//Enable Pulldown
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}
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GP16E &= ~1;
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} else if(mode == OUTPUT){
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GP16E |= 1;
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}
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}
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}
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extern void ICACHE_RAM_ATTR __digitalWrite(uint8_t pin, uint8_t val) {
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pwm_stop_pin(pin);
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if(pin < 16){
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if(val) GPOS = (1 << pin);
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else GPOC = (1 << pin);
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} else if(pin == 16){
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if(val) GP16O |= 1;
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else GP16O &= ~1;
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}
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}
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extern int ICACHE_RAM_ATTR __digitalRead(uint8_t pin) {
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pwm_stop_pin(pin);
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if(pin < 16){
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return GPIP(pin);
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} else if(pin == 16){
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return GP16I & 0x01;
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}
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return 0;
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}
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/*
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GPIO INTERRUPTS
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*/
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typedef void (*voidFuncPtr)(void);
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typedef struct {
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uint8_t mode;
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void (*fn)(void);
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} interrupt_handler_t;
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static interrupt_handler_t interrupt_handlers[16];
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static uint32_t interrupt_reg = 0;
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void ICACHE_RAM_ATTR interrupt_handler(void *arg) {
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(void) arg;
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uint32_t status = GPIE;
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GPIEC = status;//clear them interrupts
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uint32_t levels = GPI;
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if(status == 0 || interrupt_reg == 0) return;
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ETS_GPIO_INTR_DISABLE();
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int i = 0;
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uint32_t changedbits = status & interrupt_reg;
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while(changedbits){
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while(!(changedbits & (1 << i))) i++;
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changedbits &= ~(1 << i);
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interrupt_handler_t *handler = &interrupt_handlers[i];
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if (handler->fn &&
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(handler->mode == CHANGE ||
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(handler->mode & 1) == !!(levels & (1 << i)))) {
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// to make ISR compatible to Arduino AVR model where interrupts are disabled
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// we disable them before we call the client ISR
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uint32_t savedPS = xt_rsil(15); // stop other interrupts
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handler->fn();
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xt_wsr_ps(savedPS);
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}
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}
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ETS_GPIO_INTR_ENABLE();
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}
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extern void ICACHE_RAM_ATTR __attachInterrupt(uint8_t pin, voidFuncPtr userFunc, int mode) {
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if(pin < 16) {
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interrupt_handler_t *handler = &interrupt_handlers[pin];
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handler->mode = mode;
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handler->fn = userFunc;
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interrupt_reg |= (1 << pin);
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GPC(pin) &= ~(0xF << GPCI);//INT mode disabled
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GPIEC = (1 << pin); //Clear Interrupt for this pin
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GPC(pin) |= ((mode & 0xF) << GPCI);//INT mode "mode"
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}
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}
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extern void ICACHE_RAM_ATTR __detachInterrupt(uint8_t pin) {
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if(pin < 16) {
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GPC(pin) &= ~(0xF << GPCI);//INT mode disabled
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GPIEC = (1 << pin); //Clear Interrupt for this pin
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interrupt_reg &= ~(1 << pin);
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interrupt_handler_t *handler = &interrupt_handlers[pin];
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handler->mode = 0;
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handler->fn = 0;
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}
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}
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void initPins() {
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//Disable UART interrupts
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system_set_os_print(0);
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U0IE = 0;
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U1IE = 0;
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for (int i = 0; i <= 5; ++i) {
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pinMode(i, INPUT);
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}
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// pins 6-11 are used for the SPI flash interface
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for (int i = 12; i <= 16; ++i) {
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pinMode(i, INPUT);
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}
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ETS_GPIO_INTR_ATTACH(interrupt_handler, &interrupt_reg);
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ETS_GPIO_INTR_ENABLE();
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}
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extern void pinMode(uint8_t pin, uint8_t mode) __attribute__ ((weak, alias("__pinMode")));
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extern void digitalWrite(uint8_t pin, uint8_t val) __attribute__ ((weak, alias("__digitalWrite")));
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extern int digitalRead(uint8_t pin) __attribute__ ((weak, alias("__digitalRead")));
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extern void attachInterrupt(uint8_t pin, voidFuncPtr handler, int mode) __attribute__ ((weak, alias("__attachInterrupt")));
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extern void detachInterrupt(uint8_t pin) __attribute__ ((weak, alias("__detachInterrupt")));
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