Hello,
i have the Olimex LPC-P2129 Development-Board, and I use the Keil
Vision3 IDE (Demo Version).
My problem ist the Timer0 interrupt. Everytime I want to built my
program, I get the message
- assembling Startup.s
- Startup.s (368): error: A1516E: Bad symbol `TimerInterrupt0', not
defined or external
what is the Problem?
I have in my main.c a part named "void TimerInterrupt0()", at this
part of the Program should be jumped if the timer0 interrupt is
active.

Startup.s.:
stmfd r13!, {r12, r14} ; save r12 & r14 */
mrs r12, spsr ; save the spsr */
stmfd r13!, {r12}
msr cpsr_c, #0x93 ; switch to Supervisor mode */
stmfd r13!, {r0-r3, r14} ; save Supervisor mode registers */
msr cpsr_c, #0x13 ; enable interrupts */
bl TimerInterrupt0 ; go handle the interrupt, this
;is declared in TIMER.C */
msr cpsr_c, #0x93 ; disable interrupts */
ldmfd r13!, {r0-r3, r14} ; restore Supervisor mode registers */
msr cpsr_c, #0x92 ; switch back to irq mode */
ldmfd r13!, {r12} ; restore spsr */
msr spsr_cxsf, r12
ldmfd r13!, {r12, r14} ; restore r12 & r14 */
stmfd r13!, {r0-r1} ; save r0 & r1 */
ldr r0, =VICVectAddr0 ; update VIC */
mov r1, #0xff
str r1, [r0]
ldmfd r13!, {r0-r1} ; restore r0 & r1 */
subs pc, lr, #0x4 ; return from the interrupt */

main.c:
void TimerInterrupt0()
{
// Write the values out to the LEDs...
unsigned int green = 0x00002000;
unsigned int yellow = 0x00001000;

IOSET0 = yellow;
IOSET0 = green;

// Wait for half the timer period...
while (*(volatile unsigned long *)TIMER0_TC <
(ulGlobalMaxTimer0Value / 2));

// Clear the interrupt bit within the IR register...
*(volatile unsigned long *)TIMER0_IR = 0xFF;
}
Thanks for our help
Bye Christian



Start a New Thread

Hi,
Why you need to put timer interrupt on startup ?
Write your interrupt using C language.

void TimerInterrupt0 (void) __irq
{
...
}

Or put on startup

EXTERN CODE32 (TimerInterrupt0?A)

>
> Hello,
> i have the Olimex LPC-P2129 Development-Board, and I use the Keil
> Vision3 IDE (Demo Version).
> My problem ist the Timer0 interrupt. Everytime I want to built my
> program, I get the message
> - assembling Startup.s
> - Startup.s (368): error: A1516E: Bad symbol `TimerInterrupt0', not
> defined or external
> what is the Problem?
> I have in my main.c a part named "void TimerInterrupt0()", at this
> part of the Program should be jumped if the timer0 interrupt is
> active.
>
> Startup.s.:
> stmfd r13!, {r12, r14} ; save r12 & r14 */
> mrs r12, spsr ; save the spsr */
> stmfd r13!, {r12}
> msr cpsr_c, #0x93 ; switch to Supervisor mode */
> stmfd r13!, {r0-r3, r14} ; save Supervisor mode registers */
> msr cpsr_c, #0x13 ; enable interrupts */
> bl TimerInterrupt0 ; go handle the interrupt, this
> ;is declared in TIMER.C */
> msr cpsr_c, #0x93 ; disable interrupts */
> ldmfd r13!, {r0-r3, r14} ; restore Supervisor mode registers */
> msr cpsr_c, #0x92 ; switch back to irq mode */
> ldmfd r13!, {r12} ; restore spsr */
> msr spsr_cxsf, r12
> ldmfd r13!, {r12, r14} ; restore r12 & r14 */
> stmfd r13!, {r0-r1} ; save r0 & r1 */
> ldr r0, =VICVectAddr0 ; update VIC */
> mov r1, #0xff
> str r1, [r0]
> ldmfd r13!, {r0-r1} ; restore r0 & r1 */
> subs pc, lr, #0x4 ; return from the interrupt */
>
> main.c:
> void TimerInterrupt0()
> {
> // Write the values out to the LEDs...
> unsigned int green = 0x00002000;
> unsigned int yellow = 0x00001000;
>
> IOSET0 = yellow;
> IOSET0 = green;
>
> // Wait for half the timer period...
> while (*(volatile unsigned long *)TIMER0_TC <
> (ulGlobalMaxTimer0Value / 2));
>
> // Clear the interrupt bit within the IR register...
> *(volatile unsigned long *)TIMER0_IR = 0xFF;
> }
>
>
> Thanks for our help
> Bye Christian
>



Start a New Thread