ARM: GNU assembler error

I don't know much about GNU assembler syntax, but why not using C for writing registers? Usually you have different hardware blocks, which can be described in a structure. A simplified example for an UART:

typedef volatile unsigned long vu32;

typedef struct { vu32 dataOut; vu32 dataIn; vu32 baudRate; vu32 status; } UartType;

Now we can define two UART blocks just like this:

#define PERIPH_BASE ((u32)0x40000000) #define UART0_BASE (PERIPH_BASE + 0x1200) #define UART1_BASE (PERIPH_BASE + 0x1300)

#define UART0 ((UartType *) UART0_BASE) #define UART1 ((UartType *) UART1_BASE)

In your code you can now use it like this:

UART0->baudRate = 115200; while (1) { while ((UART0->status & INCOMING_BYTE) == 0); printf("%c", UART0->dataIn); }

I've seen this idea in sample code from Atmel, first, but in sample code for the STM32 series it is used, too, and avoids errors.

Of course, you can write it like, this, too:

This should be translated to the same code like you are trying to use in your macro (but the structure idea should translate to this code, too).

-ffreestanding

-mtune=arm926ej-s

I don't know the ARM assembly syntax, but it looks a little odd with the "=" sign - are you sure that's needed?

Are you trying to write your application in assembly? If so, why?

mvh.,

David

reestanding

an -ggdb -mtune=3Darm926ej-s

Try looking here,

-ffreestanding

-mtune=arm926ej-s

Did you remember to name the file extension a capital S?

To have the headers pre-processed, the file must be named as mysource.S and the translation done with the gcc front- end (not directly arm-as).

If you did that, please post the definitions of MM3001_SMC_BASE and MM3001_SMC_SMBWST1R7.