I found a problem on the Cortex-M3 port. In the port.c file the MSP (main stack pointer) is initialized assuiming that the vector table is strored at the adress 0x00000000, using a bootloader this is not hte case. For that reason I modified the code as follow:


Line 160: prvSetMSP( *((unsigned portLONG *) portNVIC_VTABLE ) );

The portNVIC_VTABLE must be defined using:

#define portNVIC_VTABLE 0xE000ED08


Hope can help....

Very good point. Can we add this to the standard download?

Another correction should be done is the systick timer reload value. To be correct the value should be loaded using:

*(portNVIC_SYSTICK_LOAD) = (configCPU_CLOCK_HZ / configTICK_RATE_HZ)-1;

regards

Ravaz

I like to make sure I make that mistake over and over again :o) It will be right (for this port at least) in the next version.

Regards.

I would take the chance to thank you for the great job and for the perseverance you have to continously improve it....

I did the modification for the version 4.8.0 as follow

void vPortStartFirstTask(void)
{
asm volatile(
" ldr r0, =0xE000ED08 \n" /* Load the NVIC_TABLE offset address. */
" ldr r0, [r0] \n" /* Get the vector table offset. */
" ldr r0, [r0] \n" /* Get the stack pointer. */
" msr msp, r0 \n" /* Set the msp back to the start of the stack. */
" svc 0 \n" /* System call to start first task. */
);
}


Regards


Ravaz