I'm implementing a UVC protocol on M484. I use manual-validation because UVC payload can only be sent in packet. The packet format is 2 bytes header + pixel payload. As my test, I use 258 as ep size for iso channel, which is 2-byte header and 128 16-bit RGB565 data.
According to the log from NuConsole, the behavior of TXPKIF is strange, below is the log:
write ep0 buffer 258 bytes.
set ep0 DATSIZE to 258.
txpkif0: EPTXCNT=258,EPDATCNT=0
write ep0 buffer 258 bytes.
set ep0 DATSIZE to 258.
txpkif0: EPTXCNT=258,EPDATCNT=0
write ep0 buffer 258 bytes.
set ep0 DATSIZE to 258.
txpkif0: EPTXCNT=258,EPDATCNT=258
txpkif0: EPTXCNT=258,EPDATCNT=0
write ep0 buffer 258 bytes.
set ep0 DATSIZE to 258.
txpkif0: EPTXCNT=258,EPDATCNT=0
write ep0 buffer 258 bytes.
set ep0 DATSIZE to 258.
txpkif0: EPTXCNT=258,EPDATCNT=258
txpkif0: EPTXCNT=258,EPDATCNT=0
......
write ep0 buffer 258 bytes.
set ep0 DATSIZE to 258.
txpkif0: EPTXCNT=258,EPDATCNT=258
txpkif0: EPTXCNT=258,EPDATCNT=0
write ep0 buffer 258 bytes.
set ep0 DATSIZE to 258.
txpkif0: EPTXCNT=258,EPDATCNT=0
write ep0 buffer 258 bytes.
set ep0 DATSIZE to 258.
txpkif0: EPTXCNT=258,EPDATCNT=258
txpkif0: EPTXCNT=258,EPDATCNT=0
write ep0 buffer 258 bytes.
set ep0 DATSIZE to 258.
txpkif0: EPTXCNT=258,EPDATCNT=0
write ep0 buffer 258 bytes.
set ep0 DATSIZE to 258.
txpkif0: EPTXCNT=258,EPDATCNT=258
txpkif0: EPTXCNT=258,EPDATCNT=0
write ep0 buffer 258 bytes.
set ep0 DATSIZE to 258.
txpkif0: EPTXCNT=258,EPDATCNT=0
write ep0 buffer 258 bytes.
set ep0 DATSIZE to 258.
txpkif0: EPTXCNT=258,EPDATCNT=258
txpkif0: EPTXCNT=258,EPDATCNT=0
write ep0 buffer 258 bytes.
set ep0 DATSIZE to 258.
txpkif0: EPTXCNT=258,EPDATCNT=0
*txpkif0: EPTXCNT=258,EPDATCNT=0
write ep0 buffer 258 bytes.
set ep0 DATSIZE to 258.
txpkif0: EPTXCNT=258,EPDATCNT=0
*txpkif0: EPTXCNT=258,EPDATCNT=0
write ep0 buffer 258 bytes.
set ep0 DATSIZE to 258.
txpkif0: EPTXCNT=258,EPDATCNT=0
*txpkif0: EPTXCNT=258,EPDATCNT=0
write ep0 buffer 258 bytes.
set ep0 DATSIZE to 258.
txpkif0: EPTXCNT=258,EPDATCNT=0
*txpkif0: EPTXCNT=258,EPDATCNT=0
write ep0 buffer 258 bytes.
set ep0 DATSIZE to 258.
txpkif0: EPTXCNT=258,EPDATCNT=0
*txpkif0: EPTXCNT=258,EPDATCNT=0
write ep0 buffer 258 bytes.
set ep0 DATSIZE to 258.
txpkif0: EPTXCNT=258,EPDATCNT=258
txpkif0: EPTXCNT=258,EPDATCNT=0
*txpkif0: EPTXCNT=258,EPDATCNT=0
......
write ep0 buffer 258 bytes.
set ep0 DATSIZE to 258.
txpkif0: EPTXCNT=258,EPDATCNT=0
write ep0 buffer 258 bytes.
set ep0 DATSIZE to 258.
txpkif0: EPTXCNT=258,EPDATCNT=258
txpkif0: EPTXCNT=258,EPDATCNT=0
write ep0 buffer 258 bytes.
set ep0 DATSIZE to 258.
txpkif0: EPTXCNT=258,EPDATCNT=0
write ep0 buffer 258 bytes.
set ep0 DATSIZE to 258.
txpkif0: EPTXCNT=258,EPDATCNT=258
txpkif0: EPTXCNT=258,EPDATCNT=258
txpkif0: EPTXCNT=258,EPDATCNT=258
txpkif0: EPTXCNT=258,EPDATCNT=258
txpkif0: EPTXCNT=258,EPDATCNT=258
txpkif0: EPTXCNT=258,EPDATCNT=258
txpkif0: EPTXCNT=258,EPDATCNT=258
HSUSB ISO TXPKIF strange behavior
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- Posts: 31
- Joined: 22 Mar 2017, 09:54
HI vsf,
Could you show us the USB packet during transmission, without that I have no idea what's USB going on.
Thanks
Could you show us the USB packet during transmission, without that I have no idea what's USB going on.
Thanks
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