Hello,I'm using the soft-core Cortex-M0,and keil uvision 5, I have initialized the registers used for my ADDER : 0x59000000--->059FFFFFF and run simulation using vivado simulator when i tried that with assembly the simulaion worked correctly,but if i tried to add c code with the assembly it doesn't work: this the code: -----------------------------------------------------------------------------------------
; Vector Table Mapped to Address 0 at Reset PRESERVE8 THUMB AREA RESET, DATA, READONLY EXPORT __Vectors __Vectors DCD 0x0000FFFC DCD Reset_Handler DCD 0 DCD 0 DCD 0 DCD 0 DCD 0 DCD 0 DCD 0 DCD 0 DCD 0 DCD 0 DCD 0 DCD 0 DCD 0 DCD 0 ; External Interrupts DCD 0 DCD 0 DCD 0 DCD 0 DCD 0 DCD 0 DCD 0 DCD 0 DCD 0 DCD 0 DCD 0 DCD 0 DCD 0 DCD 0 DCD 0 DCD 0 AREA |.text|, CODE, READONLY ;Reset Handler Reset_Handler PROC GLOBAL Reset_Handler ENTRY IMPORT __main LDR R0, =__main BX R0 ENDP EXPORT func func FUNCTION ENDFUNC ALIGN 4 END
------------------------------------------------------------------------------------- and the code C :
#include <stdlib.h> #include <stdio.h> #include <rt_misc.h> #define AAA (*((volatile unsigned long *)(0x59000000UL))) extern void func_x() { unsigned int volatile * const port1 = (unsigned int *) AAA; int a = 0x11111111; *port1 = a; } int main(void) { func_x(); return 0; }
Hello, last yead,i'd the same error with simulation using vivado for expl,i remember,i did things like that: Reset_Handler PROC GLOBAL Reset_Handler ENTRY
IMPORT __main LDR R0, =__main BX R0
nd the main was:
#define AAA 0x59000000 int main(void) { *(unsigned int*)AAA=0x31 ; return 0; }
Consider using the debugger, turn off "run to main", and step through your code one instruction at a time until you understand what's wrong. Suggest a Hard Fault handler so you can see when it fails, and a routine for the other unused vectors to use instead of zero.
Make sure you have correctly defined the memory for the linker, and that your stack points to usable RAM.