code to transmit is now stored in EEPROM, for faster customization
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@ -1,10 +1,24 @@
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/* micro-controller firmware fot the Monarch 318LIPW1K(-L) remote
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*/
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Copyright (C) 2014 Kévin Redon <kingkevin@cuvoodoo.info>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/* libraries */
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#define __12f629
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#include <pic12f629.h>
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#include <stdint.h>
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#define sleep() __asm sleep __endasm
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/* the peripherals connected to the pins */
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#define LED_ANODE _GP0
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@ -12,16 +26,18 @@
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#define SWITCH _GP4
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#define LED_CATHODE _GP5
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#define CODE 0xc917c2 // the code to transmit. least significant bit will be sent first, and must be 1 (sync bit)
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volatile int8_t transmit = 0; // transmitting (0: do not transmit, 1: transmit, -1: finish transmiting)
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volatile uint8_t phase = 0; // the 4 phases of the bit (2ms pause, 1ms pulse, 2ms pause, 1ms pulse. only transmit during one of the two pulse periode depending on the bit value)
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/* simple functions */
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// NOTE LED and TX can not be enabled at the same time
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// note: LED and TX can not be enabled at the same time
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#define led_on() GPIO |= LED_ANODE;
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#define led_off() GPIO &= ~LED_ANODE;
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#define tx_on() GPIO |= TX;
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#define tx_off() GPIO &= ~TX;
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#define sleep() __asm sleep __endasm
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/* variables */
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//volatile uint32_t code = 0; // the code to transmit (read from EEPROM)
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volatile int8_t transmit = 0; // transmitting (0: do not transmit, 1: transmit, -1: finish transmiting)
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volatile uint8_t phase = 0; // the 4 phases of the bit (2ms pause, 1ms pulse, 2ms pause, 1ms pulse. only transmit during one of the two pulse periode depending on the bit value)
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/* configuration bits
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* all set (to 1) per default
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@ -35,17 +51,15 @@ uint16_t __at(_CONFIG) __CONFIG = _CPD_OFF & // no data code protect
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_WDTE_OFF & // no watchdog
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_INTRC_OSC_NOCLKOUT; // use internal oscilator and both I/O pins
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/* default code to transmit in EEPROM
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a megacode is 3 bytes long (MSB of byte 1 is 1)
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append 0x00 to indicate end
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*/
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// 0x2100 comes from the PIC12F629 Memory Programming document
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__code uint8_t __at(0x2100) EEPROM[] = {0xc9, 0x17, 0xc2, 0x00};
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/* set timer in ms */
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#define TICKS_PER_MS 145UL // the number of timer 1 ticks to wait for 1ms, using the internal 4MHz clock and a prescaler of 8, and hand tuning
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// 145 is a good value
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/*
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void timer (uint8_t ms) {
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TMR1ON = 0; // disable timer 1 (to write value safely)
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TMR1L = (0xffff-ms*TICKS_PER_MS); // set time
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TMR1H = (0xffff-ms*TICKS_PER_MS)>>8; // set time
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TMR1ON = 1; // start timer 1
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}
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*/
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void timer_1ms() {
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TMR1ON = 0; // disable timer 1 (to write value safely)
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@ -61,13 +75,24 @@ void timer_2ms() {
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TMR1ON = 1; // start timer 1
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}
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/* read EEPROM data */
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uint8_t read_eeprom(uint8_t address) {
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EEADR = address;
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RD = 1;
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return EEDATA;
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}
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/* transmit the megacode */
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void megacode (void) {
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static uint8_t byte;
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uint8_t bit = phase/4;
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if (transmit != 0) {
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if (bit%8==0) { // read byte to transmit
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byte = read_eeprom(bit/8);
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}
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if (bit<24) { // transmit bit
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if (phase%2) {
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uint8_t pulse = (CODE>>(23-bit))&0x01;
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uint8_t pulse = (byte>>((23-bit)%8))&0x01;
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if ((phase%4==1 && !pulse) || (phase%4==3 && pulse)) {
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led_off();
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tx_on();
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@ -112,10 +137,12 @@ static void interrupt(void) __interrupt 0
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if (transmit == 1) {
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transmit = -1; // stop transmitting after last transmition
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}
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} else if (transmit == 0) { // switch is pressed, start transmission
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transmit = 1;
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phase = 0;
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megacode(); // start sending megacode
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} else { // switch is pressed, start transmission
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if (transmit == 0) { // only transmit if code is loaded
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transmit = 1;
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phase = 0;
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megacode(); // start sending megacode
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}
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}
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GPIF = 0; // clear interrupt
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}
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@ -142,7 +169,11 @@ void main (void)
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PIE1 = 1; // enable timer 1 interrupt
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PEIE = 1; // enable timer interrupt
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GIE = 1; // globally enable interrupts
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if (read_eeprom(0)&0x80) { // verify if the code is programm (the MSB bit is always 1 for megacode codes)
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GIE = 1; // globally enable interrupts
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} else { // show error and got to sleep forever
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led_on();
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}
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while (1) {
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if (transmit == 0) {
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@ -1,22 +1,42 @@
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# variables
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TARGET = 318LPW1K-L
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EEPROM = eeprom
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PIC = 12f629
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# software verion used:
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# pk2cmd: 1.21
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# sdcc: 3.4.0
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# gputils: 1.3.0
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all: off flash on
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# flash program
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flash: $(TARGET).hex
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pk2cmd -PPIC$(PIC) -F$< -M
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# power on
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# flash custom megacode in EEPROM
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eeprom: $(EEPROM).hex
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pk2cmd -PPIC$(PIC) -F$< -ME
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# power on remote
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on:
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pk2cmd -PPIC$(PIC) -T
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# power off
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# power off remote
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off:
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pk2cmd -PPIC$(PIC) -V0
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# compile source code
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%.hex: %.c
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# compile program and EEPROm
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compile: $(TARGET).hex $(EEPROM).hex
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# compile program C source code (includes a default code)
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$(TARGET).hex: $(TARGET).c
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sdcc --std-c99 --opt-code-size --use-non-free -mpic14 -p$(PIC) $<
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# compile eeprom for custom megacode
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$(EEPROM).hex: $(EEPROM).asm
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gpasm -o $(EEPROM).o -c $<
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gplink -w -r -o $(EEPROM) $(EEPROM).o
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# remove temporary files
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clean:
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rm -f $(TARGET).hex $(TARGET).lst $(TARGET).asm $(TARGET).adb $(TARGET).o $(TARGET).cod
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rm -f $(TARGET).hex $(TARGET).lst $(TARGET).asm $(TARGET).adb $(TARGET).o $(TARGET).cod $(EEPROM).hex $(EEPROM).cod $(EEPROM).lst $(EEPROM).o
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@ -0,0 +1,8 @@
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; define microcontroller
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list p=12f629
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; set custom megacode in EEPROM
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; megacode is 3 bytes long
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; end with 0x00 to indicate the end
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org 2100h ; EEPROM memory address
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DE 0xc9, 0x17, 0xc2, 0x00 ; megacode
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end
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