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@ -26,21 +26,24 @@ |
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/** Amount of free RAM
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* \return The number of free bytes. |
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*/ |
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#ifdef __arm__ |
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extern "C" char* sbrk(int incr); |
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int SdFatUtil::FreeRam() { |
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extern int __bss_end; |
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extern int* __brkval; |
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int free_memory; |
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if (reinterpret_cast<int>(__brkval) == 0) { |
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// if no heap use from end of bss section
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free_memory = reinterpret_cast<int>(&free_memory) |
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- reinterpret_cast<int>(&__bss_end); |
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} else { |
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// use from top of stack to heap
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free_memory = reinterpret_cast<int>(&free_memory) |
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- reinterpret_cast<int>(__brkval); |
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} |
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return free_memory; |
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char top; |
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return &top - reinterpret_cast<char*>(sbrk(0)); |
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} |
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#else // __arm__
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extern char *__brkval; |
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extern char __bss_end; |
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/** Amount of free RAM
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* \return The number of free bytes. |
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*/ |
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int SdFatUtil::FreeRam() { |
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char top; |
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return __brkval ? &top - __brkval : &top - &__bss_end; |
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} |
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#endif // __arm
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//------------------------------------------------------------------------------
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/** %Print a string in flash memory.
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* |
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