how to bootload lpc2148

Development Boards MicroMod
1

Hi, I am using this board:

http://www.sparkfun.com/commerce/produc … cts_id=676

I read somewhere that I should pull pin 0.14 low to stay in the bootloader. This seems to prevent my code from running, and I verified with the debugger that it is indeed in the bootloader.

When I issued the command:

lpc21isp -h -p -s/dev/ttyS0 -fserial.hex -x12000

It simply hangs and never loads anything. I know /dev/ttyS0 is attached correctly since I have loaded code over jtag and seen output over the uart.

I also tried lpc_prog:

lpc_prog -d /dev/ttyS0 -w -r serial.srec

What am I doing wrong? Is it possible I corrupted the bootloader?

't mind using a different/better bootloader, but I haven’t found anything.

Thanks.

2

I think it’s unlikely that you corrupted the bootloader.

Did you detach the debugger before trying to program?

What bit rate are you currently using for programming?

With a 12 MHz crystal I cannot get a reliable connection with the bootloader for bit rate above 38400.

3

Hi, the baud rate was the problem. I was trying to use 115200. I figured it would work fine, but I guess it makes sense if the bootloader doesn’t use the PLL.

So, I really want to bootload over usb, do I have to install a special bootloader for this? Anyone know of one?

Thanks

4

geckosenator:
So, I really want to bootload over usb, do I have to install a special bootloader for this? Anyone know of one?

There is another source for LPC214x USB bootloader available at:

http://www.tnkernel.com/usb_fw_upgrader.html

The USB Firmware Upgrader is a standalone program for the Philips LPC214x microcontroller,

which allows to download the firmware (an application program) to the microcontroller’s flash using an USB.

This is very useable for the field/customer future firmware upgrades.

5

Hi, thanks for the link, but the programmer is windows only binary with no source, and the bootloader makefiles have syntax errors.

Do you know of any other usb bootloaders?

Thanks.