Digilent JTAG cable no connection with DPC error

[Dhanuraj Pillai]

Hello,

I am having Digilent JTAG Cable which is connected to a custom made SoC from our supplier, which has arc EM4, EM6 and EV62 cores.

The JTAG cable has the following specifications:

 

On connecting to the Metaware IDE and to the target it gives the following DPC error (see log below):

Could you please help me out here , what the issue is ?

 

Thanks so much in advance!

------------------------------------------
[DIGILENT] DPC error returned 4 is unknown.
[DIGILENT] transmit (DpcPutTmsTdiBits): xmit failed of 32 bits
[DIGILENT] DPC error returned 4 is unknown.
[DIGILENT] transmit (DpcPutTmsTdiBits): xmit failed of 32 bits
[DIGILENT] DPC error returned 4 is unknown.
[DIGILENT] transmit (DpcPutTmsTdiBits): xmit failed of 32 bits
[DIGILENT] DPC error returned 4 is unknown.
[DIGILENT] transmit (DpcPutTmsTdiBits): xmit failed of 32 bits
[DIGILENT] DPC error returned 4 is unknown.
[DIGILENT] transmit (DpcPutTmsTdiBits): xmit failed of 32 bits
[DIGILENT] DPC error returned 4 is unknown.
[DIGILENT] transmit (DpcPutTmsTdiBits): xmit failed of 32 bits
[DIGILENT] DPC error returned 4 is unknown.
 

 

[Dhanuraj Pillai]

... may be I can add a few more details.

I use the Metaware IDE on Windows 10 and the above errors seems to happen after a stall in the JTAG connection.

What could be the cause? What am I missing ? 

[JTAG] JTAG remains stalled after 10 attempts; attempted operation was write_register.
[JTAG]   (JTAG status register is 0x1 = :stalled.)
[JTAG] Write of aux register 0x5 failed.
[JTAG]   Last JTAG status register = 0x1 = :stalled.
[JTAG] JTAG remains stalled after 10 attempts; attempted operation was read_register.
[JTAG]   (JTAG status register is 0x1 = :stalled.)
[JTAG] Read of aux register 0x4 failed.
[JTAG]   Last JTAG status register = 0x1 = :stalled.
[JTAG] JTAG remains stalled after 10 attempts; attempted operation was read_register.
[JTAG]   (JTAG status register is 0x1 = :stalled.)
[JTAG] Read of %r0 failed.
[JTAG]   Last JTAG status register = 0x1 = :stalled.
[JTAG] Not able to read %r0 while testing communication
 

consequently on one more try, the console starts sending the DPC errors

[DIGILENT] transmit (DpcPutTmsTdiBits): xmit failed of 7 bits
[DIGILENT] DPC error returned 4 is unknown.
[DIGILENT] transmit (DpcPutTmsTdiBits): xmit failed of 3 bits
[DIGILENT] DPC error returned 4 is unknown.
[DIGILENT] transmit (DpcPutTmsTdiBits): xmit failed of 32 bits
[DIGILENT] DPC error returned 4 is unknown.
[DIGILENT] transmit (DpcPutTmsTdiBits): xmit failed of 32 bits
[DIGILENT] DPC error returned 4 is unknown.
[DIGILENT] transmit (DpcPutTmsTdiBits): xmit failed of 32 bits
[DIGILENT] DPC error returned 4 is unknown.
[DIGILENT] transmit (DpcPutTmsTdiBits): xmit failed of 32 bits
[DIGILENT] DPC error returned 4 is unknown.
[DIGILENT] transmit (DpcPutTmsTdiBits): xmit failed of 32 bits
[DIGILENT] DPC error returned 4 is unknown.
[DIGILENT] transmit (DpcPutTmsTdiBits): xmit failed of 32 bits
[DIGILENT] DPC error returned 4 is unknown.
 

Thanks again for your help in advance!

[JColvin]

Hi @Dhanuraj Pillai,

Digilent does not have a lot of advice regarding the Metaware debugger as we do not offer support for 3rd party software; there might be some more advice in this thread, https://forum.digilentinc.com/topic/15863-information-about-jtag-hs2-working-on-haps-80/, though you likely need to reach out to Synopsys support in order to get the JTAG cable working correctly.

Thanks,
JColvin