198 lines
3.3 KiB
C
198 lines
3.3 KiB
C
/* MIT License
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Copyright (c) 2016 Daniel Treitinger
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Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#include <htc.h>
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#include <pic16F628a.h>
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__CONFIG( LVP_OFF & BOREN_OFF & CPD_OFF & MCLRE_OFF & PWRTE_ON & WDTE_OFF & FOSC_XT );
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//Global
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unsigned char toggle = 0;
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unsigned int CountA, CountB, CountC;
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unsigned int somethingpressed = 0;
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void ON()
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{
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unsigned char i = 0;
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do
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{
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RA0 = 1; // 6-7us on
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RA0 = 1;
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RA0 = 1;
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RA0 = 1;
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RA0 = 0; // 21-22 us of
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RA0 = 0;
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RA0 = 0;
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RA0 = 0;
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RA0 = 0;
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RA0 = 0;
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RA0 = 0;
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RA0 = 0;
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RA0 = 0;
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RA0 = 0;
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RA0 = 0;
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i++;
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}
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while(i<32);
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RA0 = 0;
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}
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void OFF()
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{
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unsigned char i = 0;
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do
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{
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RA0=0;
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}
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while(i++<59);
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}
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void interrupt ISR (void)
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{
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}
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void delay_89ms()
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{
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#asm
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pause89ms
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clrf _CountA
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clrf _CountB
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clrf _CountC
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movlw 0x74
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movwf _CountB
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movlw 0x02
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movwf _CountA
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movlw 0x01
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movwf _CountC
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Loop ;Wiederholung der Zeitverzögerung
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decfsz _CountA
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goto Loop
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decfsz _CountB
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goto Loop
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decfsz _CountC
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goto Loop
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#endasm
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return;
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}
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void One()
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{
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OFF();
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ON();
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}
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void Zero()
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{
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ON();
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OFF();
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}
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void evaluate_tastatur(char *comcode)
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{
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unsigned char i;
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unsigned char a;
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unsigned char e;
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e = 0;
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for(i=3; i != 255; i--)
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{
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PORTB = 0xFF;
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PORTB &= ~(1<<i);
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for(a=4; a <= 7; a++)
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{
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e++;
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if( (PORTB>>a) & 1 == 0)
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{
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*comcode = e;
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somethingpressed = 1;
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return;
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}
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}
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}
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}
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void SendRc5(char* command, char *group)
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{
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unsigned char i;
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One();
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One();
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toggle = toggle ^ 1 & 1;
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if(toggle == 1) {
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One(); }
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else {
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Zero(); }
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for(i = 4; i != 255; i--)
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{
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if((*group>>i)&1) {
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One(); }
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else {
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Zero(); }
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}
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for(i = 5; i != 255; i--)
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{
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if((*command>>i)&1) {
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One(); }
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else {
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Zero(); }
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}
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delay_89ms();
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}
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void main(void)
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{ //Takt des PIC 4MHz, ein Zyklus = 1us
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unsigned char comcode = 0;
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char subcode = 0;
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OPTION_REG = 0b00000010; //Pullups on
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CMCON = 0x07; //Turn of Comperators
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TRISA = 0x00; //PORTA is Output
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TRISB = 0xF0; //PORTB 0...3 Output
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GIE = 1; //Global Interrupt Enable
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CM0 = 1;
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CM1 = 1;
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CM2 = 1;
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PORTA = 0;
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PORTB = 0xFF;
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subcode = 29;
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INTCON = 0;
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RBIE = 1;
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while(1)
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{
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while(!RBIF) {
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SLEEP(); }
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PORTB = 0xFF;
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evaluate_tastatur(&comcode);
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if(somethingpressed == 1)
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{
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SendRc5(&comcode, &subcode);
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somethingpressed = 0;
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}
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}
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}
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