Hi
Im using a STM32F429ZI and have the folowing problem:
In my assembler program i initialize the following variables:
AREA myVars, DATA, READWRITE op1_table DCW 0x0001, 0x0017, 0xffff, 0x73a4, 0x43cc, 0xe372, 0xdd22, 0x7fff op2_table DCW 0xffff, 0x0004, 0xffff, 0x4c28, 0xc3bf, 0x0234, 0xbcde, 0x7fff
Then i want to acces them:
AREA myCode, CODE, READONLY THUMB main PROC EXPORT main LDR R0, =op1_table LDR R1, =0xff LDRH R2, [R0, #0] ; After this R2 contains 0xbe (should be 0x1) STRH R1, [R0, #0] LDRH R2, [R0, #0] ; After this R2 contains 0xff (as it should)
I can write and read from the variable, but they're not initialized as the suposed to be (with the DCW directive).
What am i missing? I wrote a c example with global variables and couldn't find a difference...
The DCW directive allocates one or more halfwords of memory, aligned on two-byte boundaries, and defines the initial runtime contents of the memory. DCWU is the same, except that the memory alignment is arbitrary.
from armasm User Guide (version 5.04)