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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1702 | - | 1 | /* |
| 2 | * MemoryFree.c |
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| 3 | * returns the number of free RAM bytes |
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| 4 | */ |
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| 5 | |||
| 6 | // Get the common arduino functions |
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| 7 | #if defined(ARDUINO) && ARDUINO >= 100 |
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| 8 | #include "Arduino.h" |
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| 9 | #else |
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| 10 | #include "wiring.h" |
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| 11 | #endif |
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| 12 | #include "MemoryFree.h" |
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| 13 | |||
| 14 | extern unsigned int __data_start; |
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| 15 | extern unsigned int __data_end; |
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| 16 | extern unsigned int __bss_start; |
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| 17 | extern unsigned int __bss_end; |
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| 18 | extern unsigned int __heap_start; |
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| 19 | extern void *__brkval; |
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| 20 | |||
| 21 | |||
| 22 | int freeMem() |
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| 23 | { |
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| 24 | int free_memory; |
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| 25 | |||
| 26 | if((int)__brkval == 0) |
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| 27 | free_memory = ((int)&free_memory) - ((int)&__bss_end); |
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| 28 | else |
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| 29 | free_memory = ((int)&free_memory) - ((int)__brkval); |
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| 30 | |||
| 31 | return free_memory; |
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| 32 | } |
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| 33 | |||
| 34 |