I got the code USB secondary ISP bootloader for LPC23xx from NXP working fine with none RTX kernel but It does not working with RTX kernel. If anyone know more detail please help.
Thank you.
Hi noom noise, I had the same problem on lpc2378. I've made my project work with non-RTX bootloader and my RTX project. I'll try to explain what I've donne:
1. Bootloader project is the one from NXP site: www.standardics.nxp.com/.../an10759.zip
All values in the bootloader project are at their default. Just unpack USBMem folder. Leave the other one. Alas, no RTX there. Compile, Flash->Erase, Flash->Download. A window displaying your device as mass storage device under windows should appear at your screen.
2. In my RTX project I've changed following:
A) Project->Options for target->Target: IROM1 start:0x2000 size:0x7E000. (from 0x0 to 0x1FFF is bootloader) (size = IROM1_size - 0x2000)
IRAM1 start:0x40001000 size:0x7000 (I was playing with bootloader IRAM1_size. And in my case, bootloader needs somewhere around 0xDFF of RAM. So in order not to overlap it's area, my IRAM1 starts at 0x40001000. Moshe Tal suggested 0x40000100 for his lpc2368 - not enough in my case. Try playing with IRAM1_size in bootloader project to determine your minimum...)
B) Project->Options for target->Linker: Misc.controls: --entry 0x2000 (that is of course, where your IROM1 starts)
C) Project->Options for target->User: Run user programs after build/rebuild: fromelf --bin .\out\my_project.axf -o .\out\firmware.bin (that way firmware.bin will be created, which you can copy to the device from PC over USB)
D)Project->Options for target->Output: check create hex file
E) Right click on your startup file: options->Asm->ConditionalAssembyControSymbols: RAM_INTVEC REMAP RAM_MODE ( This is Keil's description of what should happen: ; * RAM_INTVEC: when set the startup code copies exception vectors ; * from on-chip Flash to on-chip RAM. ; * ; * REMAP: when set the startup code initializes the register MEMMAP ; * which overwrites the settings of the CPU configuration pins. The ; * startup and interrupt vectors are remapped from: ; * 0x00000000 default setting (not remapped) ; * 0x40000000 when RAM_MODE is used ; * 0x80000000 when EXTMEM_MODE is used ; * ; * EXTMEM_MODE: when set the device is configured for code execution ; * from external memory starting at address 0x80000000. ; * ; * RAM_MODE: when set the device is configured for code execution ; * from on-chip RAM starting at address 0x40000000. )
F) Finally, I had to Copy my interupt vector table from declared beginning of my application's IROM1 to the actuall beginning of IROM1: Put this at the beginning of your RTX's main(): memcpy((char *)0x00000000, (char *)(0x00002000), 64);
(it seems that even though I used remapping (step E), code always jumps to IVT of the bootloader, that is, from 0x0..., so not exactly what you may expect after remaping to RAM... And thats why I had to copy my IVT from 0x2000 to 0x0).
G) I also had some problems with interrupts which were happening before my RTX-application's main(). I was debugging something with interrupt driven UART before the main(). When I cleared those printf functions, everything worked well. So maybe it would be wise to disable interrupts before your main()...
Also, just to mention, as RTX uses SWIs, I have SWI_Table.s file included in my RTX project.
And that's all I had to do. My RTX application works perfectly with non-RTX bootloader that NXP supplied.
NOTE: Here I have one MCB2300 board whith lpc2378 revision '-' on it. There was no chance to make the bootloader work with it. Not even with MAM disabled. I made it work only on my prototype which uses revision 'B' of lpc2378... So if you are not using revision 'B', maybe that could be the problem... Although I'm not quite shure...
I hope this helps...
Just to make this easier, I uploaded this bootloader packed with simple RTX application which uses serial port 1 at baud rate 115200.
It prints some test messages, and then loops in "init_task" to echo input from keyboard...
Here is rapidshare link: rapidshare.com/.../non_RTX_bootloader_with_RTX_application_for_lpc2378.rar
Link will be active for 90 days from now as I understood from rapidshare...
Predrag,
I almost never do this, but I had a look at the code you posted. I am afraid that I do not understand why your application does this:
memcpy((char *)0x00000000, (char *)(0x00002000), 64);
maybe I missed something, but are you not trying to write into internal flash here...? if you are trying to remap interrupt vectors, well, then you can use the facilities of the startup file of the RTX application by the macros
RAM_INTVEC REMAP RAM_MODE
or do this in the bootloader:
<code to disable interrupts> memcpy((char *)0x40000000, (char *)(0x00002000), 64); MEMMAP = 2 ; <code to enable interrupts>
now I have a small question: what will you do if your bootloader needs to jump to a software components that remaps the vectors, which then jumps to your RTX application...?
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