[Tinyos-devel] Bug in Stm25pLogP.nc

Chieh-Jan (Mike) Liang cliang4 at cs.jhu.edu
Wed Jun 6 14:32:46 PDT 2007


Sorry, when I said "return FALSE", I actually meant "return TRUE".

Mike

Chieh-Jan (Mike) Liang wrote:
> Please correct me if I am wrong, but there is a bug in 
> Sector.readDone[uint8_t id](...) in tos/chips/stm25p/Stm25pLogP.nc. The 
> lines in question are:
> 
> 320 uint8_t block = addr >> BLOCK_SIZE_LOG2;
> ...
> 329 if (++block < (call Sector.getNumSectors[ id ]()*BLOCKS_PER_SECTOR))
> 
> block is 8-bit, or 0 - 255. In the extreme case, I can have my log 
> volume occupy the whole STM25P flash (16 sectors), which would make the 
> right-hand side of the condition 256. Therefore, line 329 will always 
> return FALSE.
> 
> My proposal is to change line 320 to "uint16_t block = (addr >> 
> BLOCK_SIZE_LOG2) & 0xFF;"
> 
> Thank you
> 
> Mike
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