On Saturday, April 10, 2004, at 05:51 PM, Trevor DeVore wrote:
I would expect that a GPS unit with a USB interface is set up to look just like serial. If that is not the case, you will not be able to establish communications without something special.
Rats, it looks like it isn't going to work . driverNames() returns empty. There is a serial connection cable that I can get for it. I have a Keyspan serial->USB converter so I think I will pick that up and give it a try.
Rats. I am surprised; the GPS protocols are based on a family of navigation standards that specifies serial.
Here is an alternative to driverNames() that might come up with a different answer. (I only know of driverNames() missing the built-in modem; if you see anything else in deviceNames() and not in driverNames(), please let me know.)
-- Ken Ray and Dar Scott did this
function deviceNames
local theNames="", ioregOutput, skipLines, temp
local IOTTYDevice, IODialinDevice, IOCalloutDevice
set the hideConsoleWindows to true
put shell("ioreg -n IOSerialBSDClient") into ioregOutput
repeat forever
put lineOffset("IOSerialBSDCLient",ioregOutput) into skipLines
if skipLines is zero then return thenames
delete line 1 to skipLines of ioregOutput
-- Get all the data between the braces
put char(offset("{",ioregOutput)) to (offset("}",ioregOutput)) of ioregOutput into temp
get matchText(temp,"\"IOTTYDevice\" = \"(.*?)\"",IOTTYDevice)
if it is not true then next repeat
get matchText(temp,"\"IODialinDevice\" = \"(.*?)\"",IODialinDevice)
if it is not true then next repeat
get matchText(temp,"\"IOCalloutDevice\" = \"(.*?)\"",IOCalloutDevice)
if it is not true then next repeat
put IOTTYDevice,IODialinDevice,IOCalloutDevice & lineFeed after theNames
end repeat
end deviceNames
Another clue that you can open it as serial is finding it with 'ls /dev/cu.*'.
I think there are three categories of serial devices in OS X and I suspect that driverNames() only looks in one.
Dar Scott
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