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Issue building demo code in Crossworks

Note: This was originally posted on 24th September 2010 at http://forums.arm.com

I recently purchased (3) LCD-DEMO-LPC2158 kits for a home project. I am trying to compile the demo code provided by the manufacturer, FDI. The code was compiled in version 1.7 of uVision. When I try to compile in CrossWorks, I am getting errors. I am currently using the 30-day trial of Crossworks, and am not sure if there are limitations on the demo application, if I need to configure the tool, or if this code is not supported.

Snippet of code failing:

void CPUDisableInterrupts(void) __arm
{
    __asm {
        MRS R1, CPSR
        ORR R1,R1,#0xC0
        MSR CPSR_cxsf, R1
    }

    return;
}

Errors during build:

expected declaration specifiers before '__arm'
stray '#' in program

expected '=', ',',';', 'asm' or '__attribute__' before '{' token

Any help would be greatly appreciated

Martin Weidmann over 12 years ago

Note: This was originally posted on 24th September 2010 at http://forums.arm.com

By convention anything starting with "__" (double underscore) is something that is tool chain specific. The __asm directive with armcc (the Keil/RVDS compiler) lets you include inline assembler. It looks like the CrossWorks tools don't support __asm. They might have an equivalent, but it would mean porting the code.
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Simon Craske over 12 years ago

Note: This was originally posted on 24th September 2010 at http://forums.arm.com

As far as I'm aware, CrossWorks doesn't support inline assembler, though its documentation suggests that this might work:

#include <libarm.h> void CPUDisableInterrupts(void) { libarm_disable_irq_fiq(); }

hth
s.
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