Bootloader setup on LM3S9B96

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Posted by Mike Purvis

on Apr 30 2012 11:44 AM

Hi,

I'm having difficulties with the bootloader on LM3S9B96.

When I do a soft reset from my application (or using the reset button), the ethernet bootloader works correctly, and I see TCP traffic in Wireshark. However, when I power the device on and trigger the loader, it seems to have a different setup--- my LED test pattern blinks at a different speed (much slower), and I see no Wireshark traffic.

My application is based on the safertos example, and runs at 80MHz, using a 2.5 divider, whereas the bootloader runs at 12.5MHz.

Thanks for any pointers,

Mike

All Replies

Posted by Christian Jolivet

on May 01 2012 14:33 PM

Expert5240 points

Hi Mike,

Can you clarify a couple of details about your system? Are you using a DK-LM3S9B96 development kit, or are you working with a custom board design? Also, exactly how are you triggering the bootloader? For instance, are you calling a function such as UpdateBOOTP? Did you set up a GPIO to force updates on startup? Also, it sounds like you are using the flash-based bootloader rather than the ROM version. Is this correct?

These details will help me understand what code is executing as the chip comes out of reset and the bootloader is called.

Regards,
Christian

Posted by adam adam1

on Jan 23 2013 02:26 AM

Prodigy145 points

Hi Christian,

I have some problems about bootloader via ethernet, too. I program with your sample code (C:\StellarisWare_more\boards\dk-lm3s9d96\boot_eth) on LM3S9B92 robotic kit but it not working.

I don't understand about this, TI have no documents and no guide about this.

can you write some guides about this (ethernet bootloader) for every body.

Thanks and BR,

Vui Nguyen

Posted by Christian Jolivet

on Jan 25 2013 09:53 AM

Expert5240 points

Hi Vui Nguyen,

Actually, we do have a User's Guide for all of our boot loaders, including the Ethernet boot loader: http://www.ti.com/lit/ug/spmu134o/spmu134o.pdf

The default Ethernet boot loader should work if you go through the following process:

Program the boot_eth example to address 0x00000000 over JTAG using LM Flash Programmer.
Switch LM Flash Programmer to Ethernet mode, type in your chip's MAC address and an available IP address on the same subnet as your PC. (If you don't have the MAC, you can find it by connecting of JTAG and using the Utilities tab of LM Flash Programmer)
Connect your board to your local network over Ethernet.
Click the "program" button in LM Flash programmer.

Please note that the ethernet boot loader polls the local network less frequently as it continues to run. If it doesn't start updating immediately, you can try resetting the board to restart the polling sequence.

If this is not working, or you are trying to do something different, please let me know.

Regards,

Christian