Bad term in assembly instruction.

Gautam Bhat

Hi,

I am trying to enable DISDEFWBUF in the ACTLR Register located at 0xE000E008 in Cortex M4.

I have the following code at startup:

asm(
       " ldr r0, =0xE000E008 \n" //Load the ACTLR register address
       " ldr r1,[r0] \n" //Read the ACTLR register
       " orr r1,r1,#0x02 \n" //Set the bit in position 2 DISDEFWBUF.
       " str r1,[r0] \n" //Store the modified value back.
       );

I get the following error:

ERROR! at line 1382: [E0200] Bad term in expression
ldr r0, =0xE000E008

ERROR! at line 1382: [E0001] Illegal symbol
ldr r0, =0xE000E008

ERROR! at line 1382: [E0003] Unexpected trailing operand(s)
ldr r0, =0xE000E008

How do I fix this? I am using CCSv6 TI ARM compiler.

Thanks,

Gautam.

over 10 years ago

0 Petrei over 10 years ago

Guru 26105 points

Hi,

Gautam Bhat said:
ldr r0, =0xE000E008

This is GCC/Keil flavor of loading address. To solve, you may have two possibilties:

a) either download also and use the GCC toolchain (can be done from within CCS)

b) write this: should declare before use:

myaddress .field 0xE000E008,32

and then inside your code use it as:

ldr r0, myaddress

Would be better to have all .asm routines in a separate file.

0 Gautam Bhat over 10 years ago in reply to Petrei

Expert 1275 points

Petrei,

Thanks. That worked. I was familiar with gcc but I am not familiar with TI compiler.

-Gautam.

0 Petrei over 10 years ago in reply to Gautam Bhat

Guru 26105 points

Hi,

Please mark the thread as answered, so others take it into account.

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Bad term in assembly instruction.