RTOS/TMS320C6678: SRIO NREAD trouble

Vladimir Gustov

Part Number: TMS320C6678

Tool/software: TI-RTOS

Hello everyone. I try implement transfer of data between my custom board with DSP C6678 and FPGA Kintex-7 (direct connection, without switch, worked on SYS/BIOS).

I saw examples with SRIO from PDK. I can trans data to FPGA (by SWRITE mode) in normal mode of ports (I can see transfered data in FPGA), but can't read this data from FPGA (by NREAD).

I don't get what I am doing wrong. I need help.

Here prints of registers status of SRIO after transfer.

Here current project.

Work on CCS7.

With regards,

Vladimir

over 9 years ago

0 Cvetolin Shulev-XID over 9 years ago

TI__Guru 65405 points

Hi Vladimir,

I've forwarded this to the SRIO experts. Their feedback should be posted here.

BR
Tsvetolin Shulev

0 Vladimir Gustov over 9 years ago

Prodigy 85 points

At the moment, I can see request NREAD from DSP to FPGA (iorx_tdata field) and (may be) response from FPGA (iotx_tdata field), but I don't get any data.

Here log from read operation.

With regards,

Vladimir

0 Vladimir Gustov over 9 years ago

Prodigy 85 points

How I get, I have trouble with wrong AckID, but I don't understand how to change AckID on DSP and FPGA.

I read some post from Brandy Jabkiewicz where she show example code about AckID, but it doesn't help.

Also I read 'Keystone Software Assisted Error recovery_addendum', but after writing 0x2003F044 into register RIO_PLM_SP(n)_LONG_CS_TX1, DSP doesn't exit from error states (Input Error stopped and Output Error stopped).

What I'm doing wrong?

0 Garrett Ding over 9 years ago in reply to Vladimir Gustov

TI__Mastermind 43296 points

Hi Vladimir,

Are you able to verify if the FPGA has correctly received the Packet-Not-Accepted (PNA) and link request control symbol from DSP after writing 0x2003F044?

The ACKID discussion in the thread may help: e2e.ti.com/.../248102

Regards, Garrett

0 Vladimir Gustov over 9 years ago in reply to Garrett Ding

Prodigy 85 points

Hi Garrett,

Thank you for your reply.

I tried detect PNA and Link Request by ILA from signal of phy_debug (on page 192).

When DSP set link with FPGA ( SrioDevice_init() ) I catch situation showing on picture below. But after wrote 0x2003F044 this signals doesn't change.

With regards,

Vladimir

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RTOS/TMS320C6678: SRIO NREAD trouble