src/main/simpleGPIO.c

   1 /* FreeEMS - the open source engine management system
   2  *
   3  * Copyright 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  * @brief Simple GPIO functionality
  30  *
  31  * Code for handling low frequency bit-bang switching of general pins based on
  32  * the value of internal variables lives in this file.
  33  */
  34
  35
  36 #define SIMPLE_GPIO_C
  37 #include "inc/freeEMS.h"
  38 #include "inc/interrupts.h"
  39 #include "inc/simpleGPIO.h"
  40
  41
  42 /**
  43  * Perform GP outputs based on values of assigned variables. Compare upper and
  44  * lower thresholds with the value of the selected variable and switch on or off
  45  * as appropriate. Atomic blocks ensure no concurrency issues with current ECT.
  46  */
  47 void performSimpleGPIO(){
  48         unsigned char i;
  49         for(i = 0;i < fixedConfigs1.simpleGPIOSettings.numberConfigured && i < NUMBER_OF_OUTPUT_CONFIGS;i++){
  50                 unsigned short value = *(fixedConfigs1.simpleGPIOSettings.outputConfigs[i].variable);
  51                 if(value >= fixedConfigs1.simpleGPIOSettings.outputConfigs[i].upperValue){
  52                         if(!(fixedConfigs1.simpleGPIOSettings.outputConfigs[i].flags)){
  53                                 ATOMIC_START(); /*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&*/
  54                                 *(fixedConfigs1.simpleGPIOSettings.outputConfigs[i].port) |= fixedConfigs1.simpleGPIOSettings.outputConfigs[i].mask;
  55                                 ATOMIC_END(); /*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&*/
  56                         }else{
  57                                 ATOMIC_START(); /*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&*/
  58                                 *(fixedConfigs1.simpleGPIOSettings.outputConfigs[i].port) &= (unsigned char)~(fixedConfigs1.simpleGPIOSettings.outputConfigs[i].mask);
  59                                 ATOMIC_END(); /*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&*/
  60                         }
  61                 }else if(value <= fixedConfigs1.simpleGPIOSettings.outputConfigs[i].lowerValue){
  62                         if(fixedConfigs1.simpleGPIOSettings.outputConfigs[i].flags){
  63                                 ATOMIC_START(); /*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&*/
  64                                 *(fixedConfigs1.simpleGPIOSettings.outputConfigs[i].port) |= fixedConfigs1.simpleGPIOSettings.outputConfigs[i].mask;
  65                                 ATOMIC_END(); /*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&*/
  66                         }else{
  67                                 ATOMIC_START(); /*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&*/
  68                                 *(fixedConfigs1.simpleGPIOSettings.outputConfigs[i].port) &= (unsigned char)~(fixedConfigs1.simpleGPIOSettings.outputConfigs[i].mask);
  69                                 ATOMIC_END(); /*&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&*/
  70                         }
  71                 } // Do nothing if in hysteresis region
  72         }
  73 }