Re: Accessing I2C-Bus via ELV USB-I2C

In reply to: Axel Rau : "Re: Accessing I2C-Bus via ELV USB-I2C"
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From: Axel Rau <Axel.Rau_at_Chaos1.DE>
Date: Tue, 04 Oct 2022 10:03:19 UTC

Am 04.10.2022 um 10:39 schrieb Hans Petter Selasky <hps@selasky.org>:
> 
> That looks normal.
> 
> The DONE transaction transferred the SETUP packet, but still lists frame [0], but is not dumping the data, because it has already been sent. frame [0] is always the SETUP packet for control endpoints.
> 

So where should I dig further to find out why the read at 09:28:44.885162 shows only
'e:'  from the string, shown completely at 09:28:47.463632 (2nd block) ?

09:28:44.878743 usbus1.3 SUBM-BULK-EP=00000001,SPD=FULL,NFR=1,SLEN=4,IVAL=0
 frame[0] WRITE 1 bytes
 0000  3F -- -- -- -- -- -- --  -- -- -- -- -- -- -- --  |?               |
 flags 0x8 <PIPE_BOF|0>
 status 0xca023 <OPEN|TRANSFERRING|STARTED|BDMA_ENABLE|BDMA_SETUP|CAN_CANCEL_IMMED|DOING_CALLBACK|0>
09:28:44.878816 usbus1.3 DONE-BULK-EP=00000001,SPD=FULL,NFR=1,SLEN=0,IVAL=0,ERR=0
 frame[0] WRITE 1 bytes
 flags 0x8 <PIPE_BOF|0>
 status 0xca021 <OPEN|STARTED|BDMA_ENABLE|BDMA_SETUP|CAN_CANCEL_IMMED|DOING_CALLBACK|0>
09:28:44.885162 usbus1.3 DONE-BULK-EP=00000081,SPD=FULL,NFR=1,SLEN=4,IVAL=0,ERR=0
 frame[0] READ 2 bytes
 0000  65 3A -- -- -- -- -- --  -- -- -- -- -- -- -- --  |e:              |
 flags 0xa <SHORT_XFER_OK|PIPE_BOF|0>
 status 0xcb021 <OPEN|STARTED|SHORT_XFER_OK|BDMA_ENABLE|BDMA_SETUP|CAN_CANCEL_IMMED|DOING_CALLBACK|0>
09:28:44.885176 usbus1.3 SUBM-BULK-EP=00000081,SPD=FULL,NFR=1,SLEN=0,IVAL=0
 frame[0] READ 1024 bytes
 flags 0xa <SHORT_XFER_OK|PIPE_BOF|0>
 status 0xeb023 <OPEN|TRANSFERRING|STARTED|SHORT_XFER_OK|BDMA_ENABLE|BDMA_SETUP|CURR_DMA_SET|CAN_CANCEL_IMMED|DOING_CALLBACK|0>
09:28:44.888153 usbus1.3 DONE-BULK-EP=00000081,SPD=FULL,NFR=1,SLEN=24,IVAL=0,ERR=0
 frame[0] READ 24 bytes
 0000  31 31 35 32 30 30 20 62  69 74 2F 73 0D 0A 49 32  |115200 bit/s..I2|
 0010  43 2D 43 6C 6F 63 6B 3A  -- -- -- -- -- -- -- --  |C-Clock:        |
 flags 0xa <SHORT_XFER_OK|PIPE_BOF|0>
 
Here I get the right response:

09:28:47.457426 usbus1.3 SUBM-BULK-EP=00000001,SPD=FULL,NFR=1,SLEN=4,IVAL=0
 frame[0] WRITE 1 bytes
 0000  3F -- -- -- -- -- -- --  -- -- -- -- -- -- -- --  |?               |
 flags 0x8 <PIPE_BOF|0>
 status 0xca023 <OPEN|TRANSFERRING|STARTED|BDMA_ENABLE|BDMA_SETUP|CAN_CANCEL_IMMED|DOING_CALLBACK|0>
09:28:47.457462 usbus1.3 DONE-BULK-EP=00000001,SPD=FULL,NFR=1,SLEN=0,IVAL=0,ERR=0
 frame[0] WRITE 1 bytes
 flags 0x8 <PIPE_BOF|0>
 status 0xca021 <OPEN|STARTED|BDMA_ENABLE|BDMA_SETUP|CAN_CANCEL_IMMED|DOING_CALLBACK|0>
09:28:47.463632 usbus1.3 DONE-BULK-EP=00000081,SPD=FULL,NFR=1,SLEN=68,IVAL=0,ERR=0
 frame[0] READ 66 bytes
 0000  0D 0A 45 4C 56 20 55 53  42 2D 49 32 43 2D 49 6E  |..ELV USB-I2C-In|
 0010  74 65 72 66 61 63 65 20  76 31 2E 38 20 28 43 61  |terface v1.8 (Ca|
 0020  6C 3A 35 43 29 0D 0A 4C  61 73 74 20 41 64 72 65  |l:5C)..Last Adre|
 0030  73 73 3A 30 78 30 30 0D  0A 42 61 75 64 72 61 74  |ss:0x00..Baudrat|
 0040  65 3A -- -- -- -- -- --  -- -- -- -- -- -- -- --  |e:              |
 flags 0xa <SHORT_XFER_OK|PIPE_BOF|0>
 status 0xeb021 <OPEN|STARTED|SHORT_XFER_OK|BDMA_ENABLE|BDMA_SETUP|CURR_DMA_SET|CAN_CANCEL_IMMED|DOING_CALLBACK|0>
09:28:47.463644 usbus1.3 SUBM-BULK-EP=00000081,SPD=FULL,NFR=1,SLEN=0,IVAL=0
 frame[0] READ 1024 bytes
 flags 0xa <SHORT_XFER_OK|PIPE_BOF|0>
 status 0xcb023 <OPEN|TRANSFERRING|STARTED|SHORT_XFER_OK|BDMA_ENABLE|BDMA_SETUP|CAN_CANCEL_IMMED|DOING_CALLBACK|0>

Axel
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PGP-Key: CDE74120  ☀  computing @ chaos claudius
> 


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PGP-Key: CDE74120  ☀  computing @ chaos claudius