190 lines
3.5 KiB
C
190 lines
3.5 KiB
C
/*
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ir_rca.c - space modulated protocoll encoder
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Copyright (C) 2007 Ch. Klippel <ck@mamalala.net>
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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, see <http://www.gnu.org/licenses/>.
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*/
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#include "lpc2220.h"
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#include "infrared.h"
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#include "ir_rca.h"
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#include "encoders.h"
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#include "codes.h"
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#include "global.h"
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const struct irModule RCA_Module =
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{
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RCA_Encode,
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RCA_Send,
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RCA_Repeat,
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RCA_Stop,
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134, // carrier
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1, // carrier-on
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2 // carrier-off
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};
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extern volatile unsigned char mod_enable;
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extern volatile unsigned int cycles;
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extern volatile unsigned long keyMap[42];
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#define RCA_IDLE 0x00
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#define RCA_PRE_A 0x01
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#define RCA_PRE_B 0x02
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#define RCA_BIT_A 0x03
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#define RCA_BIT_B 0x04
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#define RCA_IBIT_A 0x05
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#define RCA_IBIT_B 0x06
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#define RCA_STOP 0x07
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#define RCA_WAIT 0x08
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#define RCA_NUMBITS 12
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#define RCA_BITTIME 28
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#define RCA_BIT0 2*RCA_BITTIME
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#define RCA_BIT1 4*RCA_BITTIME
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#define RCA_PRETIME 8*RCA_BITTIME
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#define RCA_WAITTIME 16
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void __attribute__ ((section(".text.fastcode"))) RCA_Encode (void)
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{
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switch(ir.state)
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{
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case RCA_IDLE:
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mod_enable = 0;
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break;
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case RCA_PRE_A:
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cycles = RCA_PRETIME;
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mod_enable = 1;
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ir.state++;
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break;
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case RCA_PRE_B:
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mod_enable = 0;
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ir.cmd = ir.actcmd;
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ir.state++;
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break;
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case RCA_BIT_A:
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case RCA_IBIT_A:
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case RCA_STOP:
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cycles = RCA_BITTIME;
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mod_enable = 1;
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ir.state++;
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break;
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case RCA_BIT_B:
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case RCA_IBIT_B:
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mod_enable = 0;
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if(ir.cmd & 0x0800)
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cycles = RCA_BIT1;
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else
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cycles = RCA_BIT0;
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ir.cmd <<= 1;
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ir.general.bit++;
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if(ir.general.bit == RCA_NUMBITS)
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{
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if(ir.state == RCA_BIT_B)
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{
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ir.cmd = ~ir.actcmd;
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ir.general.bit = 0;
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}
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ir.state++;
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}
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else
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ir.state--;
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break;
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case RCA_WAIT:
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mod_enable = 0;
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cycles = RCA_BITTIME;
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ir.general.wait++;
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if(ir.general.wait >= RCA_WAITTIME)
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{
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ir.general.bit = 0;
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ir.general.wait = 0;
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if (ir.general.trail)
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ir.state = RCA_PRE_A;
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else
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ir.state = RCA_IDLE;
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}
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break;
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}
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T1MR0 = cycles * RCA_Module.lo_border * RCA_Module.tval;
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}
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void RCA_LoadMap(unsigned char map)
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{
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switch(map)
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{
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default:
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copyMapPC(0x0500, (unsigned char*)RCA.table[map].codes);
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break;
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}
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}
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void RCA_Init(unsigned char map)
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{
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if(map < RCA.num_tables)
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{
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ir.state = RCA_IDLE;
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ir.cmd = 0x0000;
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ir.actcmd = 0x0000;
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ir.general.bit = 0x00;
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ir.general.wait = 0;
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RCA_LoadMap(map);
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setIR(RCA_Module);
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cycles = RCA_BITTIME;
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}
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}
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void RCA_Send(unsigned long cmd)
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{
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ir.actcmd = cmd;
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if(ir.actcmd != 0x0000) {
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setIRspeed(RCA_Module);
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ir.general.trail = 0x01;
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sysInfo |= SYS_IR;
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if (ir.state != RCA_IDLE)
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while(ir.state != RCA_IDLE);
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ir.state = RCA_PRE_A;
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runIR();
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}
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}
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void RCA_Repeat(void)
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{
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if(ir.actcmd != 0x0000)
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{
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if(ir.state == RCA_IDLE)
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{
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//ir.state++;
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//runIR();
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}
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}
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}
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void RCA_Stop(void)
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{
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if(ir.actcmd != 0x00000000)
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{
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ir.general.trail = 0;
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sysInfo &= ~SYS_IR;
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waitend:
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if(ir.state != RCA_IDLE)
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goto waitend;
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}
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stopIR();
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}
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