Content originally posted in LPCWare by pcalton on Wed Mar 06 14:25:17 MST 2013
As in the Dual Core example, I have an cortex-M0 application that is converted to an array of bytes (LR0) in a C file (CM0_Image.c) that is used by the cortex-M4 application as below:
/*-----------------------------------------------------------------------------
Load Cortex M0 Application Image
*----------------------------------------------------------------------------*/
void Load_CM0_Image (uint32_t DestAddr, const uint8_t *Image, uint32_t Sz)
{
uint32_t i;
uint8_t *dp = (uint8_t *)DestAddr;
/* Copy application image */
for (i = 0; i < Sz; i++)
{
dp = Image;
}
/* Set shadow pointer to beginning of the CM0 application */
LPC_CREG->M0APPMEMMAP = DestAddr;
}
void Start_CM0_Application(void)
{
// Stop CM0 core
LPC_RGU->RESET_CTRL1 = (1 << 24);
// Copy application from Flash to Ram
Load_CM0_Image (0x10080000, LR0, sizeof (LR0));
// Start CM0 core
LPC_RGU->RESET_CTRL1 = 0;
}
The Cortex-M4 application configures the clocks and pin configuration and then calls Start_CM0_Application
When not debugging or when debugging the Cortex-M4 application the Cortex-M0 application does not appear to be executing. However, if I switch to the CM0 project and debug the cortex-M0 then everything works fine.
I am debugging the cortex-M0 using Keil and a ULINK2 using the following debug script
FUNC void Setup (void) {
SP = _RDWORD(0x00000000); // Setup Stack Pointer
PC = _RDWORD(0x00000004); // Setup Program Counter
XPSR = 0x01000000; // Set Thumb bit
_WDWORD(0x400C0008, 0x00000000); // Disable RIT_WDT
_WDWORD(0xE000E180, 0x00000800); // Disable RIT_WDT_IRQHandler
_WDWORD(0xE000ED0C, 0x05FA0003); // VECTRESET & VECTCLRACTIVE
}
LOAD %L INCREMENTAL // Download
Setup(); // Setup for Running
g, main
Can anyone please explain what I might be doing wrong that prevents the cortex-M0 from executing normally?
