Tivaware USB - uDMA

Mathieu L.

Hi,

I got a question concerning the USB ti driver. In the bulk device, if I use the USBBufferDataWritten on 512 bytes. How many bytes are send to the PC in 1 clock? Also, can we get a speed improvement by using the uDMA to send the Data?

over 10 years ago

0 Amit Ashara over 10 years ago

TI__Guru**** 244440 points

Hello Mathieu,

One clock of what?

Regards
Amit

0 Mathieu L. over 10 years ago in reply to Amit Ashara

Expert 1630 points

Hi,

sorry, i forgot a word, I am not sure how call it in English. I meant in a clock "cycle", How many bytes are sent per clock cycle?

0 Amit Ashara over 10 years ago in reply to Mathieu L.

TI__Guru**** 244440 points

Hello Mathieu

Again: One clock cycle of what: USB Interface clock or System Clock?

Regards
Amit

0 Mathieu L. over 10 years ago in reply to Amit Ashara

Expert 1630 points

Hi,

USB Interface is on the MCU or PC?

0 Amit Ashara over 10 years ago in reply to Mathieu L.

TI__Guru**** 244440 points

Hello Mathieu,

The USB interface is a serial bus So one clock of USB interface would mean one bit. The System Clock is used to clock a parallel 32 bit bus. so one clock of System Clock would mean 32 bits.

Regards
Amit

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Tivaware USB - uDMA