37 lines
907 B
C
37 lines
907 B
C
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// getFreeSRAM.h copied from
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// http://andybrown.me.uk/2011/01/01/debugging-avr-dynamic-memory-allocation/
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/*
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* memdebug.h
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*
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* Created on: 15 Dec 2010
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* Author: Andy Brown
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*
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* Use without attribution is permitted provided that this
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* header remains intact and that these terms and conditions
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* are followed:
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*
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* http://andybrown.me.uk/ws/terms-and-conditions
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*/
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#include <inttypes.h>
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extern unsigned int __bss_end;
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extern unsigned int __heap_start;
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extern void *__brkval;
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//measure and return amount of free SRAM
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uint16_t getFreeSRAM()
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{
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uint8_t newVariable;
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// if heap is empty, use bss as start memory address
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if ((uint16_t)__brkval == 0)
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{
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return (((uint16_t)&newVariable) - ((uint16_t)&__bss_end));
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}
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// else use heap end as the start of the memory address
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else
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{
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return (((uint16_t)&newVariable) - ((uint16_t)__brkval));
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}
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};
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