Re: [Paparazzi-devel] USB bootloader

[Scott Morken]

address@hidden wrote:
> Hi Scott,
>
>   
> > I loaded the ram image of the bootloader on with lpc21isp over a
> >     
> serial
>   
> > port, and then installed a libusb driver for the bootloader.  I then
> >     
> ran
>   
> > the USB bootloader host program.
> >     
>
> not sure if lpc21isp is capable of loading/running the RAM version,
> maybe try the ROM version. The RAM version is to be loaded with
> lpc21iap. You do not have to give a serial number.
>
>   
> > I got some errors and now I cant get windows to recognize the ram
> > bootloader anymore.  It always says "unknown device".
> >     
>
> Where does this "unknown device" appear? This error
>
>   
> >     C:\winarm\utils\lpc21isp_beta_src\Debug>"C:\data\source
> >     
> code\LPCBootlo
>   
> >     aderHost\debug\LPCBootloader.exe" "C:\data\source
> >     
> code\LPCBootloaderFi
>   
> >     rmware\bl.elf" "GENERIC 112244556677"
> >     .
> >     Found USB device
> >     BootROM code: 2.12
> >     Part ID: 0x0402FF25 (LPC2148, 512k Flash, 32k+8k RAM)
> >     BootLoader version: 1.3
> >     changing vector table
> >     #ISP error (10:COMPARE_ERROR)
> >     compare MEM failed at 0x00000000 base 0x40004000 size 0x00001000
> >     
>
> shows that it detected the USB device? Maybe you can send the full chain
> of commands you gave. Did you compile with the provided makefile with
> windows?
>
> Martin
>
>
>
>
>
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>
>   
Hi

So one procedure for putting on the bootloader (windows) is:
-use the serial bootloader (lpc21isp) and put on the rom version.
-the computer now detects a "libusb\bootloader" device. Install the 
libusb driver for it.
-now use  lpc21iap to put on the bl_ram.elf, then use lpc21iap to put on 
bl.elf in that order, restart the chip with the boot pin high
I did this and now I can use the bootloader to load on my own 
applications correct?

I changed the boot pin from vbus to another with a jumper (0.13) so I 
can run my own USB app code after bootloading.

I have tried to put on the example lpcusb applications with lpc21iap so 
far.  I changed them like this so they would start at flash address 0x4000:
in the Makefile I added -n to the linker parameters,
in the linker script file "lpc2148-rom.ld" I changed the following

   MEMORY
   {
       flash                 : ORIGIN = *0x00004000, LENGTH = 496K*   
   /* FLASH ROM     *  changed from 0x00000000, Length 512K*
                           */   
       ram_isp_low(A)        : ORIGIN = 0x40000120, LENGTH = 223       
   /* variables used by Philips ISP bootloader    */         
       ram                   : ORIGIN = 0x40000200, LENGTH = 32513   /*
   free RAM area                            */
       ram_isp_high(A)        : ORIGIN = 0x40007FE0, LENGTH = 32       
   /* variables used by Philips ISP bootloader    */
       ram_usb_dma            : ORIGIN = 0x7FD00000, LENGTH = 8192   
   /* on-chip USB DMA RAM area (not used)      */
   }

   and

   SECTIONS
   {
       . = 0x00004000;                                /* set location
   counter to address zero, changed from *0x00000000* */
       ...
   }


Without these modifications and with the serial bootloader the 4 lpcusb 
demo applications work ok. 

When I try to bootload the demo apps with the above modifications I get 
this:

   C:\data\source code\LPCBootloaderHost\debug>LPCBootloader.exe "C:\data
   \lpcUSB\trunk\target\examples\hid.elf"
   .
   Found USB device
   BootROM code: 2.12
   Part ID: 0x0402FF25 (LPC2148, 512k Flash, 32k+8k RAM)
   BootLoader version: 1.3
   #
   Starting software at 0x00004000

   C:\data\source code\LPCBootloaderHost\debug>

I cant tell if this means it successfully wrote the elf file or not?

When I plug in the USB device it windows detects it as "USB device not 
recognized" which seems to indicate the code isn't working properly.


Scott