add microcontroller code for MDR receiver. button turns off LED
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/* micro-controller firmware fot the Linear MDR receiver
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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 __16f1847
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#include <pic16f1847.h>
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#include <stdint.h>
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/* the peripherals connected to the pins */
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#define RELAY1 _RA2 /* pin 1 */
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#define RELAY2 _RA3 /* pin 2 */
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/* pin 3 is connected to ground */
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/* pin 4 is used as master clear */
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/* pin 5 is Vss (ground) */
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#define SWITCH1 _RB0 /* pin 6 (on ground when pressed) */
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#define LED _RB1 /* pin 7 (used as sink) */
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#define SWITCH2 _RB2 /* pin 8 (on ground when pressed) */
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/* pin 9 is for a secret function, set by jumper WJ1, Vdd per default */
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/* pin 10 is not connected */
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/* pin 11 in not connected */
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#define MEMORY_CLK _RB6 /* pin 12, external 24LC256 EEPROM */
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#define MEMORY_DATA _RB7 /* pin 13, external 24LC256 EEPROM */
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/* pin 14 is Vdd (5V) */
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/* pin 15 is clonnected to external 4MHz ceramic resonator */
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/* pin 16 is clonnected to external 4MHz ceramic resonator */
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#define RADIO _RA0 /* radio signal receiver, filtered by LM358N */
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/* pin 18 is for a secret function, set by jumper WJ2, Vdd per default */
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/* simple functions */
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#define led_off() PORTB |= LED
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#define led_on() PORTB &= ~(LED)
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#define sleep() __asm sleep __endasm
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/* variables */
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/* configuration bits */
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uint16_t __at(_CONFIG1) __CONFIG1 = _FCMEN_ON & /* enable fail-safe clock monitor */
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_IESO_ON & /* enable internal/external switchover (since fail-safe is enabled) */
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_CLKOUTEN_ON & /* use CLKOUT for extrenal resonator (but it is ignored) */
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_BOREN_NSLEEP & /* only use brown out during normal operation (not sleep) */
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_CPD_OFF & /* no data memory code protection */
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_CP_OFF & /* no program memory code protection */
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_MCLRE_ON& /* use master clear */
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_PWRTE_ON & /* use power-up timer */
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_WDTE_OFF & /* disable watchdog */
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_FOSC_XT; /* use external resonator */
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/* initialize micro-conroller */
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void init (void) {
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ANSELA = 0; /* all pins are digital */
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ANSELB = 0; /* all pins are digital */
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TRISA |= RADIO; /* radio signal is an input */
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TRISA &= ~(RELAY1|RELAY2); /* relays are outputs */
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TRISB |= SWITCH1|SWITCH2; /* switches are inputs (with external pull-ups) */
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TRISB &= ~(LED|MEMORY_CLK|MEMORY_DATA); /* LED is I2C memory are outputs */
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led_off(); /* starting state */
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/*
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IOC |= (SWITCH1|SWITCH2|SWITCH3|SWITCH4); // enable interrupt for the switches
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GPIE = 1; // enable interrupt on GPIO
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last_gpio = GPIO; // save current state
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T1CON = _T1CKPS1 | _T1CKPS0; // set prescaler to 8
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// 0 is set per default, but just be sure
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TMR1ON = 0; // stop timer 1
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TMR1GE = 0; // enable timer 1
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TMR1CS = 0; // use internal clock / 4 (=1MHz)
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TMR1IF = 0; // clear interrupt
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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; // enable interrups
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*/
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}
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/* funcion called on interrupts */
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/* interrupt 0 is only one on PIC16 */
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static void interrupt(void) __interrupt 0
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{
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}
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void main (void)
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{
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init(); /* configure micro-controller */
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led_on();
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while (1) { /* a microcontroller runs forever */
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if (PORTB&SWITCH1) {
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led_off();
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} else {
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led_on();
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}
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// sleep(); /* sleep to save power */
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}
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}
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# variables
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TARGET = MDR
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PIC = 16f1847
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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: flash
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# flash program
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flash: $(TARGET).hex
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pk2cmd -PPIC$(PIC) -F$< -M -W -R
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# compile program
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compile: $(TARGET).hex
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# compile program C source code (includes a default code)
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$(TARGET).hex: $(TARGET).c
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sdcc --std-c99 --opt-code-size --use-non-free -mpic14 -p$(PIC) $<
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# 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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