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我在调一块usb声卡,枚举的时候set config之后为什么会set idle,然后stall pid,哪位帮忙看一下问题出在哪儿好吗,多谢。下面是用bus hound抓的包。
21.0 CTL 21 01 00 02 00 08 02 00 SET CUR 43.1.0
21.0 DO 00 00 .. 43.2.0
22.0 CTL 80 06 00 01 00 00 12 00 GET DESCRIPTOR 44.1.0
22.0 DO 12 01 10 01 00 00 00 08 51 04 02 26 01 01 01 02 00 01 ........Q..&.... 44.2.0
22.0 CTL 80 06 00 02 00 00 09 00 GET DESCRIPTOR 45.1.0
22.0 DO 09 02 29 00 01 01 00 80 32 ..).....2 45.2.0
22.0 CTL 80 06 00 02 00 00 29 00 GET DESCRIPTOR 46.1.0
22.0 DO 09 02 29 00 01 01 00 80 32 09 04 03 00 02 03 00 00 00 09 21 00 01 00 01 22 23 00 07 05 83 03 2a ..).....2....... 46.2.0
22.0 CTL 00 09 01 00 00 00 00 00 SET CONFIG 47.1.0
22.0 CTL 21 0a 00 00 03 00 00 00 SET IDLE 48.1.0
22.0 USTS 04 00 00 c0 stall pid 48.2.0
22.0 CTL 81 06 00 22 03 00 63 00 GET DESCRIPTOR 49.1.0
22.0 DI 05 01 09 00 a1 01 05 01 09 30 15 00 25 ff 75 08 95 2a 81 02 05 01 09 31 15 00 25 ff 75 08 95 2a .........0..%.u. 49.2.0
21.0 CTL a1 81 00 01 00 05 01 00 GET CUR 50.1.0
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