Comments on: Lightweight USB Host. Part 5 – control transfers.

By: oleg

oleg — Mon, 07 Feb 2011 16:50:54 +0000

It looks like normal HID, not a “boot” variety. Boot code may work but I’d rather use like in example linked from my previous comment in this thread.

By: Gianfranco

Gianfranco — Sun, 06 Feb 2011 15:18:34 +0000

Here description_parser output:

—————————————————–
Start
Device addressed… Requesting device descriptor.
Device descriptor:

Descriptor Length: 12
USB version: 1.10
Class: 00 Use class information in the Interface Descriptor
Subclass: 00
Protocol: 00
Max.packet size: 08
Vendor ID: 0FDE
Product ID: CA01
Revision ID: 0302
Mfg.string index: 00
Prod.string index: 01 Length: 4 Contents:
Serial number index: 00
Number of conf.: 01

Configuration number 0
Total configuration length: 34 bytes

Configuration descriptor:
Total length: 0022
Number of interfaces: 01
Configuration value: 01
Configuration string: 00
Attributes: 80
Max.power: 32 100ma

Interface descriptor:
Interface number: 00
Alternate setting: 00
Endpoints: 01
Class: 03 HID (Human Interface Device)
Subclass: 00
Protocol: 00
Interface string: 00

HID descriptor:
Descriptor length: 09 9 bytes
HID version: 1.10
Country Code: 0 Not Supported
Class Descriptors: 1
Class Descriptor Type: 22 Report
Class Descriptor Length:34 bytes

HID report descriptor:

Length: 2 Type: Global Tag: Usage Page Undefined Data: 00 Data: FF
Length: 1 Type: Local Tag: Usage Data: 01
Length: 1 Type: Main Tag: Collection Application (mouse, keyboard) Data: 01
Length: 1 Type: Local Tag: Usage Data: 01
Length: 1 Type: Global Tag: Logical Minimum Data: 00
Length: 2 Type: Global Tag: Logical Maximum Data: FF Data: 00
Length: 1 Type: Global Tag: Report Size Data: 08
Length: 1 Type: Global Tag: Report Count Data: 08
Length: 1 Type: Main Tag: Input Data,Array,Absolute,No Wrap,Linear,Preferred State,No Null Position,Non-volatile(Ignore for Input), Data: 00
Length: 1 Type: Local Tag: Usage Data: 02
Length: 1 Type: Global Tag: Logical Minimum Data: 00
Length: 2 Type: Global Tag: Logical Maximum Data: FF Data: 00
Length: 1 Type: Global Tag: Report Size Data: 08
Length: 1 Type: Global Tag: Report Count Data: 08
Length: 1 Type: Main Tag: Output Data,Variable,Absolute,No Wrap,Linear,Preferred State,No Null Position,Non-volatile(Ignore for Input), Data: 02
Length: 0 Type: Main Tag: End Collection

Endpoint descriptor:
Endpoint address: 01 Direction: IN
Attributes: 03 Transfer type: Interrupt
Max.packet size: 0008
Polling interval: 0A 10 ms
—————————————————–

Here there is the decimal output of your “MAX3421E USB Host controller keyboard communication” example:

1 -1 -36 0 0 -36 1 0
2 0 66 0 0 -36 1 0
1 48 66 0 0 -36 1 0
2 -108 0 0 0 -36 1 0
2 0 0 0 0 -36 1 0
2 48 0 0 0 -36 1 0
2 48 102 0 0 -36 1 0
1 1 102 0 0 -36 1 0
1 -1 102 0 0 -36 1 0
2 0 66 0 0 -36 1 0
1 48 66 0 0 -36 1 0
2 -108 0 0 0 -36 1 0
2 0 0 0 0 -36 1 0
2 48 0 0 0 -36 1 0

Can I use this keyboard example to get correctly data of my weather station?

By: oleg

oleg — Sat, 05 Feb 2011 18:06:44 +0000

The output looks like HID reports. Take a look at this page -> http://www.circuitsathome.com/communicating-arduino-with-hid-devices-part-1 You may also want to run descriptor_parser from here -> https://github.com/felis/USB_Host_Shield/tree/master/examples to see what your device’s report descriptor looks like.

By: Gianfranco

Gianfranco — Fri, 04 Feb 2011 06:19:13 +0000

I had read somewhere that this string was necessary to start
sending data from the meteorological station. I have seen, however, that the data is sent without sending this string. So for now I do not study this aspect.

I get this kind of data, I know I have to “interpret”them. As
you seem?

For example I get:

[...]
1 FFFFFFFF 0 30 63 1 0 0
7 0 42 30 FFFFFF98 0 0 0
5 30 0 30 6A 1 0 0
1 FFFFFFFF 0 30 6A 1 0 0
7 0 42 30 FFFFFF98 0 0 0
5 30 0 30 6A 1 0 0
1 FFFFFFFF 0 30 6A 1 0 0
7 0 42 30 FFFFFF98 0 0 0
5 30 0 30 6A 1 0 0
1 FFFFFFFF 0 30 6A 1 0 0
7 0 42 31 FFFFFF93 0 0 0
5 30 0 30 66 1 0 0
1 FFFFFFFF 0 30 66 1 0 0
7 0 42 30 FFFFFF98 0 0 0
5 30 0 30 6A 1 0 0
1 FFFFFFFF 0 30 6A 1 0 0
7 0 60 7D FFFFFFFF 0 0 0
5 0 0 0 FFFFFFDC 1 0 0
1 FFFFFFFF 0 0 FFFFFFDC 1 0 0
7 0 42 30 FFFFFF98 0 0 0
5 30 0 30 6A 1 0 0
[...]

As I read on the net, these values may be correct, the only values
which I think are wrong: FFFFFFFF and FFFFFFXX. What do you think?

I connected the Arduino to the USB of the PC and then apply it with a 9V battery
additional current from the jack.

By: oleg

oleg — Tue, 01 Feb 2011 22:46:53 +0000

What is this string – a packet or a report? It looks like a request for the report number one; in this case, take a look how this is done in Arduino code here -> http://www.circuitsathome.com/communicating-arduino-with-hid-devices-part-1

By: Gianfranco

Gianfranco — Tue, 01 Feb 2011 22:43:04 +0000

Hi, I’m using your tutorials to learnd about USB communications in Arduino.

I have to send this string to a weather station (recognized as HID): 20 00 08 01 00 00 00 00

How I have to proceed?

Thanks you very much!!

By: oleg

oleg — Sat, 11 Sep 2010 19:24:41 +0000

David,

Return codes are MAX3421E USB transfer result codes. They are described in Maxim Application Note 3785, “Maxim 3421E Programming Guide”. Maxim used to have this appnote posted on their site; for some reason, it is not available at the moment. However, copies are available on the net, googling for “maxim an3785″ brings several useful results, here is one -> http://www.hdl.co.jp/ftpdata/utl-001/AN3785.pdf . Page 10 contains short list of result codes, page 36 has all codes. Rcode 4 means NAK, which for HID devices may mean many things, form “slow device” to “new information is not available”, depending on device configuration. See this page for information about communicating to HID devices -> http://www.circuitsathome.com/communicating-arduino-with-hid-devices-part-1

Oleg.

By: David

David — Sat, 11 Sep 2010 19:09:33 +0000

Hi,

Where can I find information about the return codes of XferDispatchPkt? I am trying to use the USB host shield for a different model of Mad Catz PS3 controller than the one your example was developed for and I am getting an rcode=4 value from rcode = dispatchPkt( tokINHS, ep, nak_limit ); from inside USB::ctrlStatus( byte ep, boolean direction, unsigned int nak_limit ).

Thanks,

David

By: oleg

oleg — Fri, 18 Sep 2009 14:27:16 +0000

I'm using YARPP

By: Ricardo

Ricardo — Fri, 18 Sep 2009 14:22:34 +0000

Hi,

Great post, but my question is about what wordpress plugin are you using for related posts (seens to work very well)? Thanks!