JTAG zynq

[juanelete]

Hi there,

I am trying to read and write register using JTAG-HS3. For this purpose I am using DPCUTIL library in linux. Can I use this library to read and write register in a Zynq FPGA (xc7z015)? 

When I call "DpcOpenJtag" it allways returns false... I do not what I have to put in the device name parameter (char * szdvc).

Thanks in advance,

Juan.

 

 

 

[jpeyron]

Hi @juanelete,

DPCUTIL is a wrapper for Adept 1.x and is deprecated. It calls functions inside of DMGR, DJTG, DEPP, and DSPI libraries. You should be using a combination of the DMGR (to find and open devices) and DJTG libraries. If you want to continue to attempt to use dpcutil then you can try passing in “JtagHs3” for the device name string parameter. We don’t provide a TAP level API so if you want to read and write registers you are going to have to use the DJTG library to implement the correct bit sequences. It’s certainly possible to do this with the JTAG-HS3. Unfortunately, we do not have any example applications.

cheers,

Jon

[juanelete]

Hi @jpeyron,

Do you think it is possible to do the example described in this link with my configuration?

http://hamsterworks.co.nz/mediawiki/index.php/Digilent_EPP_Performance

I have a board designed by us with a Zynq FPGA (xc7z015) and I am connected via digilent JTAG cable (JTAG-HS3) from my PC.

Thanks,

Juan.

 

[jpeyron]

Hi @juanelete,

Unfortunately, It will not work . It would requires the USB controller to support DEPP and the HS3 does not. DEPP is only on the older boards (Nexys 1 – 3, Basys 1, Genesys 1, Atlys) that use the cypress chip.

thank you,

Jon