Sunday Nov 01, 2009

Using openocd JTAG on the AT91SAM9G20

I've been working to bring up prototype of a SPOT board based on the Atmel AT91SAM9G20 processor.  This is an ARM9 (ARM 926) that is several generations past the SPOT's AT91RM9200. I've used openocd JTAG to bring up the board and wanted to post the script.[Read More]

Sunday Aug 09, 2009

Programming the LM Cortex M3

I have tossed around a number of ideas on how to hook Ethernet to the SPOTs. The AT91RM9200 does have a built in Ethernet MAC and we did bring out the RMII interface with the intention of having Ethernet hooked up someday. The design needed an RMII PHY and 50MHz oscillator and we would have to adapt low level MAC drivers and integrate a TCP/IP stack.

I found an interesting option. When I was at the FIRST competition in Atlanta last April, I met with the Luminary Micro folks about their chips. What interested me the most was a low priced Cortex M3 (ARM) processor with built in Ethernet MAC-PHY.[Read More]
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