TMS320C5505: Confirm the Usage of TXPKTRDY

Kaka

Guru 24520 points

Part Number: TMS320C5505

Hi TI Experts,

Please let me confirm the following question.

[Question]
If TXPKTRDY is set by manual, is there potential that the device will send the dummy/trash data to endpoint?

Best regards.
Kaka

over 6 years ago

0 Cvetolin Shulev-XID over 6 years ago

TI__Guru 65405 points

I've forwarded this to the c55x experts. Their feedback should be posted here.

BR
Tsvetolin Shulev

0 Lalindra Jayatilleke over 6 years ago

TI__Mastermind 30365 points

Hi Kaka-san,
I will need to check on the response to your questions with a C5000 USB expert who is currently out of office. Please give a few days. Thanks for your patience.

Lali

0 Kaka over 6 years ago in reply to Lalindra Jayatilleke

Guru 24520 points

Hi Lali,

Thank you for your follow-up us.
I am waiting for your kind feedback.

Best regards.
Kaka

0 Lalindra Jayatilleke over 6 years ago in reply to Kaka

TI__Mastermind 30365 points

Kaka-san,
Sure, I will update this thread and the other one you have open once I have more details.

Lali

0 Ming Wei over 6 years ago

TI__Mastermind 41935 points

Hi Kaka-san,

You should always set the TXPKTRDY bit after you load a new packet into the TX FIFO. It is used to inform the USB core that the TX packet is ready to be transmitted . The packet size is decided by the USB core when the data is copied into the TX FIFO. If you set the TXPKTRDY without copy any data into the TX FIFO, then a zero length packet will be send out to USB host. Therefore the dummy/trash packet will never be sent.

Best regards,

Ming

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TMS320C5505: Confirm the Usage of TXPKTRDY