Although I still don't see the whole picture, I think that your problem is that you are using 8 bits for every element. Now either it's 0:225 or -128 to +127. So you probably have declared the struct that you send as int8_t[][] array. Try to declare it as int16_t and don't forget that the default message payload size is 28 bytes.
Arik On Sat, Apr 10, 2010 at 23:39, Sindra Dk <[email protected]> wrote: > Hi all, > im working on copression algorithm and i use TinyOS 2.x > i send an image from PC to mote i decompressed it then when i resend it to > PC > i get an error on its pixels value: > > Original matrix > uint8_t A[i][j]={{172,132,4,39},{23,127,5,4},{44,7,6,9},{77,211,19,5}}; > > $ java TestSerial -comm ser...@com5:telos > Sending packet 0 > ser...@com5:115200: resynchronising > Sending packet 1 > Received packet sequence number 1 > l'affichage est:-29 (wrong value) > l'affichage est:26 > l'affichage est:-32 > l'affichage est:-17 > l'affichage est:-87 (wrong value) > l'affichage est:19 > l'affichage est:-48 > l'affichage est:5 > l'affichage est:77 > l'affichage est:17 > l'affichage est:72 > l'affichage est:-18 > l'affichage est:-118 > l'affichage est:-4 > l'affichage est:85 > l'affichage est:-8 > > *************************************** > Display matrix as C is: > 227 (this is a true value) > 26 > -32 > -17 > 169.5 (this is a true value) > 19.5 > -48.5 > 5.5 > 77 > 17 > 72 > -18 > -118.5 > -4.5 > 85.5 > -8.5 > i don't know why i can't display values higher than 127!!! > can any one help me please? and thanks in advance. > Ragards, > Sindra > > ------------------------------ > Hotmail : une messagerie fiable avec une protection anti-spam performante > Inscrivez-vous <https://signup.live.com/signup.aspx?id=60969> > > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > -- Best Regards, Arik Sapojnik
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