topic Re: Download code to flash memory in non-zero adress in LPCXpresso IDE

Download code to flash memory in non-zero adress

lpcware — Wed, 15 Jun 2016 21:27:59 GMT

Content originally posted in LPCWare by Almaz on Wed Sep 19 01:56:22 MST 2012
I write in "Keil uvision4".
When i download code to flash memory in non-zero adress (for example in 0x00000100) microcontroller does not work.
The place in which i load a code i set follows:
right click on project-->Options for target-->Linker-->R/O base = 0x00000100.
When I look in the HEX-file, I see that it records the addresses starting with 0x00000100.
Downloading this code from LPCXpresso leads to "vectors still have erased values" error.
What i forgot?
Thanks)

Re: Download code to flash memory in non-zero adress

lpcware — Wed, 15 Jun 2016 21:28:00 GMT

Content originally posted in LPCWare by ArtjomGromak on Wed Sep 19 03:06:01 MST 2012

Quote: Almaz
I write in "Keil uvision4".
When i download code to flash memory in non-zero adress (for example in 0x00000100) microcontroller does not work.
The place in which i load a code i set follows:
right click on project-->Options for target-->Linker-->R/O base = 0x00000100.
When I look in the HEX-file, I see that it records the addresses starting with 0x00000100.
Downloading this code from LPCXpresso leads to "vectors still have erased values" error.
What i forgot?
Thanks)

Your program must have stack_pointer_value in address 0x0 and Reset_Handler placed in 0x4.
Now your program can't work.

Re: Download code to flash memory in non-zero adress

lpcware — Wed, 15 Jun 2016 21:28:01 GMT

Content originally posted in LPCWare by Almaz on Wed Sep 19 03:20:50 MST 2012

Quote: ArtjomGromak
Your program must have stack_pointer_value in address 0x0 and Reset_Handler placed in 0x4.
Now your program can't work.

How to be.
It turns out that i can not download two programs into one microcontroller (for example "application_1" program in first sector and "application_2" program in second sector)?

Re: Download code to flash memory in non-zero adress

lpcware — Wed, 15 Jun 2016 21:28:01 GMT

Content originally posted in LPCWare by TheFallGuy on Wed Sep 19 03:29:35 MST 2012
If you want two programs, you must also have a boot loader that will switch between them. As you have been told, you must (as a minimum) provide an SP and a Reset Handler in the first two locations.

Re: Download code to flash memory in non-zero adress

lpcware — Wed, 15 Jun 2016 21:28:02 GMT

Content originally posted in LPCWare by ArtjomGromak on Wed Sep 19 03:35:08 MST 2012

Quote: Almaz
How to be.
It turns out that i can not download two programs into one microcontroller (for example "application_1" program in first sector and "application_2" program in second sector)?

Да, нужно записать две программы во flash. каждая по своему смещению.

Re: Download code to flash memory in non-zero adress

lpcware — Wed, 15 Jun 2016 21:28:02 GMT

Content originally posted in LPCWare by ArtjomGromak on Wed Sep 19 03:42:09 MST 2012

Quote: ArtjomGromak
Да, нужно записать две программы во flash. каждая по своему смещению.

Post http://knowledgebase.nxp.com/showthread.php?t=3615 about boot

Re: Download code to flash memory in non-zero adress

lpcware — Wed, 15 Jun 2016 21:28:03 GMT

Content originally posted in LPCWare by Almaz on Wed Sep 19 04:12:01 MST 2012
Спасибо за ссылку)) Буду разбираться(Как я на нее поиском не наткнулся?).

Re: Download code to flash memory in non-zero adress

lpcware — Wed, 15 Jun 2016 21:28:04 GMT

Content originally posted in LPCWare by Almaz on Wed Sep 19 23:59:27 MST 2012
used microcontroller is lpc11c24 (processor Cortex-m0).
When i use inline assembly from "NXP secondary bootloader" example:

__asm volatile("ldr r0, =0x103C");
__asm volatile("ldr r0, [r0]");
__asm volatile("mov pc, r0");

I get the error:
aplication\main.c(34): error: #1113: Inline assembler not permitted when generating Thumb code

But i can't set the arm mode, because Cortex-m0 is Thumb-only processor!

Re: Download code to flash memory in non-zero adress

lpcware — Wed, 15 Jun 2016 21:28:04 GMT

Content originally posted in LPCWare by whitecoe on Thu Sep 20 00:24:18 MST 2012

Quote: Almaz

I get the error:
aplication\main.c(34): error: #1113: Inline assembler not permitted when generating Thumb code

As you are running Keil's tools, you might want to consider posting on their forum....

http://www.keil.com/forum/

But you could also check the Keil documentation. The "Errors and Warnings" manual contains details of the error you are encountering...

http://www.keil.com/support/man/docs/armerr/armerr_babdjcci.htm

HTH!

Re: Download code to flash memory in non-zero adress

lpcware — Wed, 15 Jun 2016 21:28:05 GMT

Content originally posted in LPCWare by Almaz on Thu Sep 20 01:09:04 MST 2012

Quote: whitecoe
As you are running Keil's tools, you might want to consider posting on their forum....

http://www.keil.com/forum/

But you could also check the Keil documentation. The "Errors and Warnings" manual contains details of the error you are encountering...

http://www.keil.com/support/man/docs/armerr/armerr_babdjcci.htm

HTH!

Thanks for advice))

the second link I get advice: This warning is intended as a reminder to consider using the embedded assembler or built-in intrinsics instead of inline assembler.
Using of embedded assembler - not at any price.
remains using the built-in intrinsics.
Consider replacing all the inline assembler functions on built-in intrinsics functions in a piece of code from my last code.
Do you think all the commands in this code have built-in intrinsics analogs?

Re: Download code to flash memory in non-zero adress

lpcware — Wed, 15 Jun 2016 21:28:05 GMT

Content originally posted in LPCWare by Almaz on Fri Sep 21 03:31:03 MST 2012
I learned how to jump out of the "bootloader" in the "application", if "application" does not use interrupts:

/****************************************************************/
#include "LPC11xx.h"
#include "core_cm0.h"
#include "system_LPC11xx.h"

__ASM void __jump_( )
{
ldr r0, =0x1000
ldr r0, [r0]
mov sp, r0

ldr r0, =0x1004
ldr r0, [r0]
mov pc, r0
}

int main(void)
{
SystemInit();
LPC_SYSCON->SYSAHBCLKCTRL |= (1<<6);
__jump_( );
while(1);
}
/********************************************************************/

But when i try to copy all interrupt vectors table:

/********************************************************************/
#include "LPC11xx.h"
#include "core_cm0.h"
#include "system_LPC11xx.h"

__ASM void __jump_( )
{
ldr r0, =0x1000
ldr r0, [r0]
mov sp, r0

ldr r0, =0x1004
ldr r0, [r0]
mov pc, r0

ldr r0, =0x1008
ldr r0, [r0]
ldr r1, =0x0008
mov [r1], r0

ldr r0, =0x100C
ldr r0, [r0]
ldr r1, =0x000C
ldr r1, [r1]
mov pc, r1

......................
//exactly the same set of commands
......................

ldr r0, =0x10BC
ldr r0, [r0]
ldr r1, =0x00BC
ldr r1, [r1]
mov pc, r1

}

int main(void)
{
SystemInit();
LPC_SYSCON->SYSAHBCLKCTRL |= (1<<6);
__jump_( );
while(1);
}

Is not work.
The set of commands:

ldr r0, =0x10BC
ldr r0, [r0]
ldr r1, =0x00BC
ldr r1, [r1]
mov pc, r1

Don't work. Where I was wrong?

Re: Download code to flash memory in non-zero adress

lpcware — Wed, 15 Jun 2016 21:28:06 GMT

Content originally posted in LPCWare by Almaz on Mon Oct 01 23:31:15 MST 2012
My secondary bootloader for lpc11c24 without using remapping, because:

Quote:
On-chip RAM from address 0x1000 0050 to 0x1000 00B8 is used by the CAN API. This address range should not be used by the application. For applications using the on-chip CAN API, the linker control file should be modified appropriately to prevent usage of this area for application’s variable storage.

Both bootloader and application use the CAN interrupts.
CAN_IRQHandler of "bootloader":

Quote:

__ASM void CAN_IRQHandler_of_application(void)
{
ldr r0, =0x2074
ldr r0, [r0]
bx r0
}

void CAN_IRQHandler(void)
{
if ( *(uint32_t *)0x100001F0 == 0x67 )
{
CAN_IRQHandler_of_application( );
}
else
{
(*rom)->pCAND->isr();
}
}

CAN_IRQHandler of "application":

Quote:

void CAN_IRQHandler (void)
{
(*rom)->pCAND->isr();
}

The value 0x67 in SRAM-memory to 0x100001F0 write "application" when start:

Quote:

uint32_t *ram_vector_table;
ram_vector_table=(uint32_t *)0x100001F0;
*ram_vector_table = 0x67;

It is simple and it is work:)

Re: Download code to flash memory in non-zero adress

lpcware — Wed, 15 Jun 2016 21:28:07 GMT

Content originally posted in LPCWare by Almaz on Fri Oct 05 03:28:36 MST 2012
Hardware bootloader of lpc11c24 have comand "Go" to restart the microcontroller after download a program to him. But address by which this comand can jump should be on a word boundary. My Reset_handler located by adress 0x01ad. How can i move him to a word boundary adress, for example, to 0x01b0?
I use Keil