18F4455 Timer0 read/write TMR0H

[Franck26]

Hello everybody,
I'm trying to use the timer0 of a 18F4455.

I would like to write and read the TMR0H register.
I have read in the datasheet that to write in TMR0H, I have to put the value in TMR0H buffer and write TMR0L which will push the TMR0H buffer value into the real TMR0H regiter.
And same idea to read it.

I think it's what I'm doing with this code:

[Ttelmah]

Why not just use the #byte directive, which is designed for this?.
#locate, is 'dangerous', since it blocks the CCS C from using the location itself. It is designed for _you_ to locate values into memory that _you_ control, not to access registers that C itself may need to access.
It is not working, in a different way, to what I'd expect, but remember that #locate, is _exclusive_, and will block other variables from using the same area...

[Franck26]

Hello Ttelmah,
Thanks for the answer.

I was using #locate to keep a minimum of compatibility with other compilers.
I will try #byte tomorrow (I don't have the target during the weekend), I'm not sure it will change something for this problem, but if it's better...

In fact the volatile keyword was in another file, I forgot to remove it when I put all the code in the same file to make an example .

Franck.

[Franck26]

Hello,
I found the problem in my code:
I made a mistake on the define of T08BIT_16BIT which configure the timer as 8 bits or 16 bits .

T08BIT_16BIT have to be 0 to configure a 16 bits timer, which was not the case in my code.

With T0CON.T08BIT = 0 it's working fine.

Thanks for your help.
Franck.