Problem with writing in program flash mem

lovlylion · Joined: 28 Apr 2008 Posts: 1

HI all

i tried to write in flash program memory using CCS on pic16f887 , the compilation process give me succesful but running it not doing any thing...its my code :

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

Where are your #fuses and #use delay() statements ? Where are your variable declarations ? How are you checking if the program memory
has been written correctly ?

Post a complete test program with all of the items listed above.
Also post your compiler version.

Is this test being done on a hardware board, or are you doing it with
a simulator in MPLAB or Proteus ?

Guest · Posted: Tue Apr 29, 2008 4:51 am

i don't use anything need delay,
i use mplab v8.0.2
i have pickit2 so i tested with it and read mem after execution of this program

its the complete code:

#include <16F887.h>
// 16F887.h for fuse option constants.
#FUSES INTRC,NOWDT,NOPUT,NOMCLR,NOPROTECT,NOCPD,NOBROWNOUT,NOIESO,NOFCMEN,NOLVP
void main(){
int i=0x1000,value=0x0006;
for(;i<=0x1fff;i++) {
write_program_memory(i, value, 2);

}
}

Matro · Guest

Declaration of variables shall not be "int" but "unsigned int16".

Matro.

Matro · Guest

Moreover data shall be transmitted through a pointer.

Guest · Posted: Tue Apr 29, 2008 11:42 am

thank u matro;

but iam sorry to tell u that it still not working , but compilation process succed :(

Matro · Guest

Blob · Posted: Wed Apr 30, 2008 6:06 am

hello,

you declare int16.

it is 4 bytes right?

no, not right, as matro mentions in next reply a byte is 8 bits
and an int16 is then 2 bytes

then write_program_memory(adress, dataptr, count)

adress being the adress 16 bit

dataptr pointer to data

count bytes to write => int16 = 4 bytes => count should be 4

nit should be 2

Best Regards

Matro · Guest

Blob · Posted: Wed Apr 30, 2008 6:18 am

Wow, thanks Matro that will help me in my own project!!!

i will change my post to avoid misunderstandings...

thanks