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Altera_Forum
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17 years ago

jtag interface from user aplication

Hi, I'm trying to access the jtag port inside the fpga with the alt_jtag_atlantic block (also used in the jtag_uart for the niosII processor). I need access to the jtag port from a custom...
Altera_Forum's avatar
Altera_Forum
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13 years ago

Hi

I'm trying to use the jtagatlantic library, but I have a problem when I call the function jtagatlantic_open(). I want to build a program with Dev-C++ to send data to the Nios II processor in my FPGA board.

If I load the Nios II system in the board and I run the software in the Nios II processor since the Nios II SBT for Eclipse, when I run my C++ program the function jtagAtlantic_open() don't open the link. The function jtagatlantic_get_error() returns the value -6 (Target or port in use, see other_info) and the parameter other_info contains "Nios2 on 127.0.0.1".

In the other hand, If I load the Nios II system but I don´t run any software in the Nios II processor, then the function jtagatlantic_open() run well.

So, I think the problem is that the jtag uart can't be used at the same time by jtag atlantic and the Nios II program.

What can I do about it?

Thanks,

David