CCS Structures

Trampas · Guest

Hello,

I created a structure simular to:

typedef struct {
CHAR data[8];
CHAR data2[4];
FLOAT value;
} myStruct;

I am using the structure to store data in the on chip Flash. That is I am trying to:

myStruct test;

sprintf(test.data,"hi");
test.value=30.0;
address=0xE000; //address in Program Flash memory
write_program_memory(address,(UBYTE *)test,sizeof(myStruct));
read_program_memory(address,(UBYTE *)test,sizeof(myStruct));

The problem is that the data gets hosed doing this. Therefore I am wondering if CCS's compiler is not treating structures as K&R C does?

Is there a list of where CCS differs from C in these hidden ways?

Thanks
Trampas

Ttelmah · Guest

Darren Rook · Joined: 06 Sep 2003 Posts: 287 Location: Milwaukee, WI

I would think it's a problem with write_program_memory(), and not a problem with pointers.

Guest · Posted: Wed Jul 28, 2004 8:13 am

Darren,

Well the write_program_memory() is a CCS internal function call, so I guess you are saying the compiler is broken?

As far as questions about the chip, I am using a 18F8680.

Trampas

Darren Rook · Joined: 06 Sep 2003 Posts: 287 Location: Milwaukee, WI

Maybe.

Don't forget that write_program_memory() will erase the block depending on what address you give it.

Darren Rook · Joined: 06 Sep 2003 Posts: 287 Location: Milwaukee, WI

Trampas,

please e-mail me.

Guest · Posted: Wed Jul 28, 2004 2:12 pm

Well to keep you all updated, Darren said he could not find anything wrong with the read/write program memory functions but is going to keep looking at them...

What in the heck does that mean?

Next he wants me to send my code to him for review....

Why is it I always feel like I spend half my time debugging the compiler instead of writting code?

I do like the CCS compiler when it works. It is really good for one or two pages of code. Beyond that.....

Trampas

UKH · Joined: 13 Jul 2004 Posts: 3 Location: Germany

Hello together,

I think Daren is looking for an existing problem with write_program_memory(). There are some problems reported in this forum with this function, especially with latest compiler-version(s).

I found a problem as I used an update from 3.189 (here it works) to 3.204 (see my link below).

I hope that Daren found something because since 3.189 I couldn't use a never version of a compiler but some implementations of newest versions are important too. Sad

Please take a look to:

http://www.ccsinfo.com/forum/viewtopic.php?t=19895&highlight=writeprogrammemory.

So long
UKH

"The better is the enemy of the good"