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Hello,
I've got a board with the AT91RM9200, where a u-boot bootloader is installed. Now, I want to erase the external flash (SPI-Flash) where the bootloader is installed to write my programm to the target without a bootloader. But I always get the message "no jtag target found". The COM LED from the ULINK is blue. So I don't know why I have no access to the device.
Tina
could it be that the pin assignment of the jtag adapter is wrong to use it together with the ulink?
Pin1 = VCC Pin2 = VCC Pin3 = NTRST Pin4 = VCC Pin5 = TDI Pin6 = VCC Pin7 = TMS Pin8 = VCC Pin9 = TCK Pin10 = VCC Pin11 = TCK Pin12 = VCC Pin13 = TDO Pin14 = VCC Pin15 = NRST Pin16 = VCC
best wishes Tina
Nine VCC and no GND???
I read that in the datasheet of the board...
www.taskit.de/.../Portux_TechnicalReference.pdf
Page23 is the pin assignment for the jtag interface... so I have no chance to use this board together with my keil µvision edition 3? Do you know which jtag interface I can use for this board?
best wishes tina
That is a very buggy JTAG description!
The left pin row is numbered 1-8, and the right pin row is numbered with even (sometimes colliding) numbers...
I'm quite sure that the left pin row should be odd numbers, and that all even numbers should be GND.
>The left pin row is numbered 1-8, and the right pin >row is numbered with even (sometimes colliding) >numbers...
right - I will call them tomorrow. But if you are right, and the right pin row is GND, the left pin row is not suitable with the ulink2, is it?
now I get the right connections for the jtag interface - it's almost the same connection of the ARM 20-Pin Connection (Ulink2).
So I use the 16-pin connector with the 20-pin ARM connector and connect the first 16pins - but it doesn't work....
The only difference is, that the 16-pin connector on the board has no RTCK (AT91RM9200) and therefore the company has left this pin unconnected...
I don't know where could be the problem now... the JTAG speed is 100kHz, and I connect the jtag connector to the board and then I turn of the voltage, so that the u-boot bootloader don't start.
I hope anybody could help me with this problem