17
edits
Project:RELaserSoftware/USB protocol: Difference between revisions
From London Hackspace Wiki
Added basic command format
(Added basic command format) |
|||
| Line 29: | Line 29: | ||
It isn't, the protocol dosn't seem to be doing any block level management at all, looks like the controller is nice enough to do that for us [[User:JasperWallace|JasperWallace]] 01:11, 28 November 2010 (UTC) | It isn't, the protocol dosn't seem to be doing any block level management at all, looks like the controller is nice enough to do that for us [[User:JasperWallace|JasperWallace]] 01:11, 28 November 2010 (UTC) | ||
All USB command follow the same format: | |||
<pre> | |||
host 01 05: sending 1 byte: are you there? | |||
laser 04: yes I am here | |||
host 05 01 01 10 06 e8: sending 5 bytes, 1 byte payload, always 1, 10 is the command, 06 is the payload, e8 is the checksum | |||
laser 06: OK, I received and understood (ACK) | |||
laser 05: host, are you there? | |||
host 01 04: sending 1 byte, yes i am here | |||
laser 00 01 10 00 ef: 0 bytes payload, always 1, repeating the command sent, payload would be here, 00 is OK (81 is checksum error), checksum | |||
host 01 06: sending 1 byte, OK (ACK) | |||
</pre> | |||
