Writing to register

[seven]

i want to know how can i write write directly to register such as sspstat,sspcon1 etc ....
i remind you i'm using pic 184550.
thanks

[valemike]

You need to define these registers using the #byte directive:

For example, i'm using the PIC18F458, and the register addresses are:

#byte PIC_SSPBUF = 0xFC9
#byte PIC_SSPADD = 0xFC8
#byte PIC_SSPSTAT = 0xFC7
#byte PIC_SSPCON1 = 0xFC6
#byte PIC_SSPCON2 = 0xFC5

Do the above defines in the beginning of your .c file.

Then you would address them just like you do other variables:

e.g.

PIC_SSPSTAT = 0x23; // writes the value 0x23 to PIC_SSPSTAT

To read PIC_SSPADD:

int8 this_byte;
...
this_byte = PIC_SSPADD

[seven]

thank you!
My problem is i can"t locate those registers.
could you help to find them for PIC 18F4550?

[valemike]

Page 66 of the .pdf datasheet of the PIC18F4550 shows a chart where all these values are.

You have to navigate thru the Microchip.com website to find each specific device's datasheet. For the pic18f4550, it's here:

http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1335&dDocName=en010300

[valemike]

[seven]