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LPC1778 can't start from any IROM Address only 0x0

Dear All,

I use LPC1778 and try to divide internal flash memory for my handmade bootloader and firmware.
And when i set another IROM1 start address for my firmware (for example 0x1000) i see SWD Communication Failure message in window "Building Output". After that i can't debug or update my mcu. Can use only ISP.
Why changing IROM1 start address is stopping MCU?
What i have to do to run my code from any address?
P.S. When i use LPC2367 there is no these problems.
P.P.S. My version 4.53

I trying apply RAM_MODE, REMAP commands for my startup file. But doesn't work.
With best regards, Vladimir.

Parents

0 Vladimir Timohin over 12 years ago in reply to Vladimir Timohin

I removed .ini file. And created bootloader with next code:


#define NVIC_VectTab_FLASH       0x10000
#define SP_OFFS                     0
#define RESET_OFFS                  4


int main (void)
{
        //========== NEW BOOTLOADER FOR CORTEX-M3 =================
  void (*user_code_entry)(void);
  register uint32_t MSP __ASM("msp");
  SCB->VTOR       = NVIC_VectTab_FLASH;
  user_code_entry = (void (*)(void))(( *((unsigned int *)(NVIC_VectTab_FLASH + RESET_OFFS))) );
  MSP             = *((unsigned int *)(NVIC_VectTab_FLASH + SP_OFFS));

  user_code_entry();
}

And after burning my programm from: 0x10000 address
I see next message:

SWD Communication Failure.

Where is my mistake?
Please help.

Reply

0 Vladimir Timohin over 12 years ago in reply to Vladimir Timohin

I removed .ini file. And created bootloader with next code:


#define NVIC_VectTab_FLASH       0x10000
#define SP_OFFS                     0
#define RESET_OFFS                  4


int main (void)
{
        //========== NEW BOOTLOADER FOR CORTEX-M3 =================
  void (*user_code_entry)(void);
  register uint32_t MSP __ASM("msp");
  SCB->VTOR       = NVIC_VectTab_FLASH;
  user_code_entry = (void (*)(void))(( *((unsigned int *)(NVIC_VectTab_FLASH + RESET_OFFS))) );
  MSP             = *((unsigned int *)(NVIC_VectTab_FLASH + SP_OFFS));

  user_code_entry();
}

And after burning my programm from: 0x10000 address
I see next message:

SWD Communication Failure.

Where is my mistake?
Please help.

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