unknown Opcode '.pword'

Question

When I compile my code I am getting a unknown Opcode '.pword' error. The only line of code in my project that has .pword is:

do {
    __asm__ volatile (" .pword 0xDA4000");
    Nop();
} while(0)

Commenting the line out does nothing.

I searched .pword 0xDA4000 and know it is supported by the IDE MPLab for PICs.

In my case the IDE I am using is CrossStudio for a STMf32f2xx chip.

I have the updated CrossStudio which comes with binutils 2.21 and gcc 4.6.0

I initially had a problem with compiling unnamed structs and unions but adding -fms-extensions into additional C compiler options fixed it.

I dont know if I need to do something similar to fix Opcode '.pword' error.

could it just be that .pword is only a PIC opcode?

As you run into further pic specific issues Electronics.Stackexchange.com has quite a few questions and quite a few experts. Just an aside if we can be of help. — Kortuk, Oct 20 '11 at 21:08

score 2 · Accepted Answer · answered Oct 20 '11 at 17:31

2

In MPLAB ASM30 assembler the .pword declare 24 bit constant in code memory. It can be also any MPLAB ASM30 instruction.

answered Oct 20 '11 at 17:31

GJ.

Ok, so it sounds that .pword is a unique opcode specific to the MPLAB assembler. – microb Oct 20 '11 at 17:35
@microb: No, .pword` isn't opcode. The meaning of `.pword` (it is a constant type) is 24 bit constant declaration in code memory and that constant can be opcode. – GJ. Oct 20 '11 at 17:39
oh, like a int float word etc – microb Oct 20 '11 at 17:42
@microb: or even function call. :) – GJ. Oct 20 '11 at 17:43
still unsure why im getting compiler issues. I'm cant find anything other then the code above that has pword. – microb Oct 20 '11 at 18:02
@microb: sure, `.pword` is specific for 24 bit RISC DSPs. – GJ. Oct 20 '11 at 18:05
thanks for your help looks like have to look into it a bit more. – microb Oct 20 '11 at 18:22

1 Answers1