README
¶
USB TMC
This is a fork from https://github.com/gotmc/usbtmc.
Overview
The purpose is to renew the repo completely based on gousb, since the feature of selecting between two usb libraries is not working anymore(or I failed miserably). This is targeted specifically for controlling USB test instruments without visa library. The goal is to provide similar experience as in pyvisa package from python.
USB TMC Specs
Refer to USB TMC Spec for details. If you are not familiar with USB protocol, which I'm also, take a tour on USB in a nutshell
Installation
$ go get github.com/grvstick/usbtmc
Usage
You'll need to install gousb. Please note that libusb is a prerequisite for gousb
$ go get -v github.com/google/gousb
Refer to tests directory for example usage of the library
Documentation
Refer to original repo or see
Disclosure and Call for Help
While this package works, it does not fully implement the [USBTMC][] specification. Please submit pull requests as needed to increase functionality, maintainability, or reliability.
License
[usbtmc][gousbtmc] is released under the MIT license. Please see the [LICENSE.txt][] file for more information.
Documentation
¶
Index ¶
Constants ¶
const ( MsgIdDevDepMsgOut msgIDtype = 1 // DEV_DEP_MSG_OUT MsgIdRequestDevDepMsgIn msgIDtype = 2 // REQUEST_DEV_DEP_MSG_IN MsgIdDevDepMsgIn msgIDtype = 2 // DEV_DEP_MSG_IN MsgIdVendorSpecificOut msgIDtype = 126 // VENDOR_SPECIFIC_OUT MsgIdRequestVendorSpecificIn msgIDtype = 127 // REQUEST_VENDOR_SPECIFIC_IN MsgIdVendorSpecificIn msgIDtype = 127 // VENDOR_SPECIFIC_IN MsgIdTrigger msgIDtype = 128 // TRIGGER )
The following msgID values are found in Table 2 under the MACRO column of the USBTMC Specificiation 1.0, April 14, 2003. The end of line comment shows the MACRO names as given in the USBTMC specification. The trigger msgID comes from Table 1 -- USB488 defined msgID values of the USBTMC-USB488 Specification 1.0, April 14, 2003.
Variables ¶
This section is empty.
Functions ¶
Types ¶
type Device ¶ added in v0.0.6
type Device struct {
BulkInEndpoint *gousb.InEndpoint
BulkInMaxPktSize int
BulkOutEndpoint *gousb.OutEndpoint
InterruptInEndpoint *gousb.InEndpoint
// contains filtered or unexported fields
}
func NewDevice ¶ added in v0.0.6
NewDevice searches for device matching vid, pid and serial number. Serial number can be omitted by passing empty string If serial number is omitted it will look for first device matching vid & pid If a device is detected, it will go over configurations to see if thare is a TMC configuration.
type UsbTmc ¶
type UsbTmc struct {
UsbDevice *Device
// contains filtered or unexported fields
}
UsbTmc models a USBTMC device, which includes a USB device and the required USBTMC attributes and methods.
func (*UsbTmc) Query ¶
Query writes the given string to the USBTMC device and returns the returned value as a string. A newline character is automatically added to the query command sent to the instrument.
Source Files