Hi,
First of all erase your chip by using erase pin. Now to load boot
loader i think there is no requirement to use TST pin. I m using
AT91SAM7x512. This controller is also new for me. In starting i was
using TST pin to load boot loader. But now i m not using TST pin to
load boot loader. I m using same version SAM-BA. To use SAM-BA there
is no requirement of "Pull-up on PA0/1/2". Just make sure that
crystal of 18.432 MHz.
Now to enumerate your CPU, before power-up dont pluge your USB cable
to your hardware.
--> First of all erase your chip.
--> Switched off supplay to your hardware.
--> If u have plugged USB cable in your hardware then remove it.
--> Switched on supplay to your hardware.
--> Plugged USB cable in your hardware.
--> Now, open SAM-BA.
--> If your hardware is configured (properly enumerated)in PC then
in connection of SAM-BA u will get other option with usb.

I think above steps will help u lot.

--- In A...@yahoogroups.com, "s_samiee_s" wrote:
>
> Hi,
>
> I'm new to the group and here is my first question.
>
> I've built a custom board with the AT91SAM7S and tried to program it
> using SAM-BA v2.6 (with USB connection).
>
> My board has following features:
> - Pull-up on PA0/1/2
> - USB pull-up controlled by PA16
> - TST switchable to high for bootloader recovery
> - 18.432 XTAL
>
> I performed the bootload copy by connecting TST pin to VCC, applied
> power,wait 10 seconds, power down.
>
> but after that when I connect the board to PC it says "USB device
not
> recognized".
> and when I run SAM-BA there is only COM ports in the list and I
can't
> find and select USB connection.
>
> I checked my board,but nothing was wrong!
>
> Is there any way to check if the board enters SAM-BA boot recovery?
> Regards,
> Sara
>

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Hi,
thanks for your help but I read something about AT91SAM7X programming
before, programming of this controller is different from 7S.It doesn't
need using test pin.And I'm sure that 7S needs Pull-up on PA0/1/2
according to datasheet.
> Now to enumerate your CPU, before power-up dont pluge your USB cable
> to your hardware.
> --> First of all erase your chip.
> --> Switched off supplay to your hardware.
> --> If u have plugged USB cable in your hardware then remove it.
> --> Switched on supplay to your hardware.
> --> Plugged USB cable in your hardware.
> --> Now, open SAM-BA.
> --> If your hardware is configured (properly enumerated)in PC then
> in connection of SAM-BA u will get other option with usb.

I use voltage of USB cable instead of power supply, but I try using
another power supply,and erased my chip before using test pin they
were not useful!

Sara

------------------------------------



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