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thanks now checksum is working

if I define all array it is working, but checksum is not calculate.

you said means that?
#define cmd
....
....
char ses[10]={0X7E, 0xFF, 0x06, "cmd", 0x00, 0x00, 0x03, 0xFE, 0xF5,0XEF};
I was that but agaın same error

Wow thanks a lot but ccs c compiler say "expression must evaluate to a constant". Why it array not write don't constant ?

thanks a lot Ttelmah and temtronic. it is working .problem is checksum.unfortunately df mını player datasheet wrong calculate checksum.how wrong writing datasheet,ı dont believe .now ı am tryıng ...

The device takes up to 3 seconds to initialise the external memory. You need to be waiting to see the 'TF card online' data from the controller, before you can start to play.

You are almost certai ...

http://hizliresim.com/lEJ9mQ

Dear all, I want to communicate between pic18f46k22 and df mono player. I send char data, I can see it on Proteus virtual terminal, but I can't get workıng df mini player.
My code:

#include <1 ...