src/decoders/Listener.c

   1 /* FreeEMS - the open source engine management system
   2  *
   3  * Copyright 2011-2012 Fred Cooke
   4  *
   5  * This file is part of the FreeEMS project.
   6  *
   7  * FreeEMS software is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * FreeEMS software is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with any FreeEMS software.  If not, see http://www.gnu.org/licenses/
  19  *
  20  * We ask that if you make any changes to this file you email them upstream to
  21  * us at admin(at)diyefi(dot)org or, even better, fork the code on github.com!
  22  *
  23  * Thank you for choosing FreeEMS to run your engine!
  24  */
  25
  26
  27 /** @file
  28  *
  29  * @ingroup interruptHandlers
  30  * @ingroup enginePositionRPMDecoders
  31  *
  32  * @brief Prevents main loop from running calculations and finishes quickly
  33  *
  34  * The purpose of this "decoder" is purely to listen to the inputs and trick the
  35  * rest of the code into not running any calculations and just sending as many
  36  * logs as it can.
  37  *
  38  * This is useful to get a smooth logic analyser or other high speed log free
  39  * of gaps in the stream.
  40  */
  41
  42
  43 #define DECODER_IMPLEMENTATION_C
  44 #define DECODER_MAX_CODE_TIME    666 // This is optimal!
  45 #define NUMBER_OF_REAL_EVENTS      1 // no events really...
  46 #define NUMBER_OF_VIRTUAL_EVENTS   1 // no events really...
  47
  48 #include "../inc/freeEMS.h"
  49 #include "../inc/interrupts.h"
  50 #include "../inc/decoderInterface.h"
  51
  52 void decoderInitPreliminary(){} // This decoder works with the defaults
  53 void perDecoderReset(){} // Nothing special to reset for this code
  54
  55 const unsigned short eventAngles[] = {0};           // no events really...
  56 const unsigned char eventValidForCrankSync[] = {0}; // no events really...
  57
  58
  59 /* Keep disabling calcs as often as we can. */
  60 void PrimaryRPMISR(){
  61         /* Clear the interrupt flag for this input compare channel */
  62         TFLG = 0x01;
  63         DEBUG_TURN_PIN_ON(DECODER_BENCHMARKS, BIT0, PORTB);
  64         // Count the number of both negative and positive going pulses seen.
  65         KeyUserDebugs.primaryTeethSeen++;
  66         /* Reset the clock for reading timeout */
  67         Clocks.timeoutADCreadingClock = 0;
  68         DEBUG_TURN_PIN_OFF(DECODER_BENCHMARKS, NBIT0, PORTB);
  69 }
  70
  71
  72 /* Keep disabling calcs as often as we can. */
  73 void SecondaryRPMISR(){
  74         /* Clear the interrupt flag for this input compare channel */
  75         TFLG = 0x02;
  76         DEBUG_TURN_PIN_ON(DECODER_BENCHMARKS, BIT1, PORTB);
  77         // Count the number of both negative and positive going pulses seen.
  78         KeyUserDebugs.secondaryTeethSeen++;
  79         /* Reset the clock for reading timeout */
  80         Clocks.timeoutADCreadingClock = 0;
  81         DEBUG_TURN_PIN_OFF(DECODER_BENCHMARKS, NBIT1, PORTB);
  82 }