Problems calling func with DllCall

[andybiochem]

Hi,

I'm trying to call functions from a dll using dllcall. I have zero experience with dlls and after maybe 3 hours trying this, I'm close to giving up!!

This is the dll I'm trying to use.

The function is supposed to find usb thermometer devices, and return temperature readings.

so far i've got:

$TEMPer = DllCall("TEMPer.Communication.dll","str","FindDevices")
ConsoleWrite(@error & @CRLF)
ConsoleWrite($TEMPer & @CRLF)

but I keep getting @error = 3 , meaning the function doesn't exist in the dll.

I have tried numerous different names, but always get the same error.

I assume i'm making a complete hash of it, can someone point me in the right direction?

cheers

[martin]

Hi,

I'm trying to call functions from a dll using dllcall. I have zero experience with dlls and after maybe 3 hours trying this, I'm close to giving up!!

This is the dll I'm trying to use.

The function is supposed to find usb thermometer devices, and return temperature readings.

so far i've got:

$TEMPer = DllCall("TEMPer.Communication.dll","str","FindDevices")
ConsoleWrite(@error & @CRLF)
ConsoleWrite($TEMPer & @CRLF)

but I keep getting @error = 3 , meaning the function doesn't exist in the dll.

I have tried numerous different names, but always get the same error.

I assume i'm making a complete hash of it, can someone point me in the right direction?

cheers

It looks like the dll is used to make a virtual com port to the usb interface for the thermocouple. The function you are trying to call is in the VB code which is just functions to communicate with the serial port. You need to get details of the dll from the suppliers, then when you have run that you should see a new COM port in device manager which you could communicate with using Hyperterminal, (or my udf for serial ports maybe), but you need more information first.

[jchd]

I'm trying to call functions from a dll using dllcall. I have zero experience with dlls and after maybe 3 hours trying this, I'm close to giving up!!

This is the dll I'm trying to use.

The function is supposed to find usb thermometer devices, and return temperature readings.

so far i've got:

$TEMPer = DllCall("TEMPer.Communication.dll","str","FindDevices")
ConsoleWrite(@error & @CRLF)
ConsoleWrite($TEMPer & @CRLF)

This is a .NET dll. You just can't call it from AutoIt using DllCall.

If I were you, I'd download the source code and simply mimic what's done there into what's available in AutoIt, using Martin's COMM support for serial low-level.

From what I've seen in a quick look, is that they communicate with their I2C devices using a standard PC serial port.

For an accurate translation into AutoIt you may have to gather precise information about the source language, but it looks fairly straightforward.

Don't forget to turn this into a generic I2C UDF once fully working, for the rest of us to suck your work without any shame!