Hello
I am new to Atmel Arm At91SAM7 but I have some experience with Philips LPC ARM family. I am not able to connect to Olimex SAM7-EX256 for reprogramming the board. I use AT 91 ISP v1.9 with SAM v2.3 and SAMBA v2.5. I use the TST jumper to enter programming mode but no chance on USB or serial link.
Plese help me with a clear procedure for uploading in AT91 flash.
Thanks
Bogdan

hello bogdan,
the at91sam7x is a little bit different from at91sam7s in terms of sam-ba.
When GPNVM bit 2 is set to 0, the device boots from ROM (SAM-BA) (which is factoy default). if you set GPNVM bit 2 to 1 (for example with SAM-BA) and you would like to use SAM-BA again you have to clear GPNVM bit 2 by setting the ERASE pin to high during power-up (this clears also the flash and some other stuff).

btw: sam-ba is only a recovery tool. it saves much time if you use a jtag-ice (like j-link/sam-ice or arm-usb-ocd) for debugging.

regards
gerhard