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rewrite freeMemory code

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This commit is contained in:
Harald Barth 2020-09-22 23:10:52 +02:00
parent cbd11e6099
commit 9bb9fa5e84
4 changed files with 64 additions and 19 deletions
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2
DCC.h
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@ -50,7 +50,7 @@ SKIPTARGET=0xFF // jump to target
// Allocations with memory implications..!
// Base system takes approx 900 bytes + 8 per loco. Turnouts, Sensors etc are dynamically created
#ifdef ARDUINO_AVR_UNO
const byte MAX_LOCOS=20;
const byte MAX_LOCOS=30;
#else
const byte MAX_LOCOS=50;
#endif

2
config.example.h
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@ -37,7 +37,7 @@ The configuration file for DCC++ EX Command Station
//
// DEFINE NUMBER OF MAIN TRACK REGISTER
#define MAX_MAIN_REGISTERS 12
#define MAX_MAIN_REGISTERS 22
/////////////////////////////////////////////////////////////////////////////////////
//

42
freeMemory.cpp Normal file
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@ -0,0 +1,42 @@
/*
* © 2020, Harald Barth
*
* This file is part of Asbelos DCC-EX
*
* This is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* It is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with CommandStation. If not, see <https://www.gnu.org/licenses/>.
*/
#include "freeMemory.h"
// thanks go to https://github.com/mpflaga/Arduino-MemoryFree
#if defined(__arm__)
extern "C" char* sbrk(int);
#elif defined(__AVR__)
extern char *__brkval;
extern char *__malloc_heap_start;
#else
#error Unsupported board type
#endif
int freeMemory() {
char top;
#if defined(__arm__)
return &top - reinterpret_cast<char*>(sbrk(0));
#elif defined(__AVR__)
return __brkval ? &top - __brkval : &top - __malloc_heap_start;
#else
#error bailed out alredy above
#endif
}

37
freeMemory.h
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@ -1,20 +1,23 @@
/*
* © 2020, Harald Barth
*
* This file is part of DCC-EX
*
* This is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* It is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with CommandStation. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef freeMemory_h
#define freeMemory_h
// thanks go to https://github.com/mpflaga/Arduino-MemoryFree
#ifdef __arm__
// should use uinstd.h to define sbrk but Due causes a conflict
extern "C" char* sbrk(int incr);
#else // __ARM__
extern char *__brkval;
#endif // __arm__
int freeMemory() {
char top;
#ifdef __arm__
return &top - reinterpret_cast<char*>(sbrk(0));
#else // __arm__
return __brkval ? &top - __brkval : &top - __malloc_heap_start;
#endif // __arm__
}
int freeMemory();
#endif