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Realview problem with "lr"

Zaid Zulkifli

Hi,

This is the code I need to make compatible with RV.

void vPortYieldProcessor( void )
{
        __asm{ ADD      lr, lr, #4 };

        /* Perform the context switch. */
        portSAVE_CONTEXT();
        vTaskSwitchContext();
        portRESTORE_CONTEXT();
}


With this code. I received error "lr is undefined"

After reading the manual, and probably understood incorrectly, I put declaration

#define   lr   __return_address()

before the above function, and received this error instead

..\..\Source\portable\Keil\ARM7\portISR.c(98): error:  #1093: Must be a modifiable lvalue

Anyone can help? Thanks

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