Welcome
Username:

Password:


Remember me

[ ]
[ ]
Online
Guests: 22, Members: 2 ...
Dr. Slack viewing forum.php
... viewing forum.php

most ever online: 333
(Members: 3, Guests: 330) on 06 Jun : 15:15

Members: 3265
Newest member: electronic6699
Members Birthdays:
All today's birthdays', congrats!
EDY19 (29)
rp181 (23)
Digital Chaos (33)


Next birthdays
02/20 [RUS]ChaosSorcerer (27)
02/20 Cade Brinkley (19)
02/21 LoveVirus (37)
Contact
If you need assistance, please send an email to forum at 4hv dot org. To ensure your email is not marked as spam, please include the phrase "4hv help" in the subject line. You can also find assistance via IRC, at irc.shadowworld.net, room #hvcomm.
Support 4hv.org!
Donate:
4hv.org is hosted on a dedicated server. Unfortunately, this server costs and we rely on the help of site members to keep 4hv.org running. Please consider donating. We will place your name on the thanks list and you'll be helping to keep 4hv.org alive and free for everyone. Members whose names appear in red bold have donated recently. Green bold denotes those who have recently donated to keep the server carbon neutral.


Special Thanks To:
  • Aaron Holmes
  • Aaron Wheeler
  • Adam Horden
  • Alan Scrimgeour
  • Andre
  • Andrew Haynes
  • Anonymous000
  • asabase
  • Austin Weil
  • barney
  • Barry
  • Bert Hickman
  • Bill Kukowski
  • Blitzorn
  • Brandon Paradelas
  • Bruce Bowling
  • BubeeMike
  • Byong Park
  • Cesiumsponge
  • Chris F.
  • Chris Hooper
  • Corey Worthington
  • Derek Woodroffe
  • Dalus
  • Dan Strother
  • Daniel Davis
  • Daniel Uhrenholt
  • datasheetarchive
  • Dave Billington
  • Dave Marshall
  • David F.
  • Dennis Rogers
  • drelectrix
  • Dr. John Gudenas
  • Dr. Spark
  • E.TexasTesla
  • eastvoltresearch
  • Eirik Taylor
  • Erik Dyakov
  • Erlend^SE
  • Finn Hammer
  • Firebug24k
  • GalliumMan
  • Gary Peterson
  • George Slade
  • GhostNull
  • Gordon Mcknight
  • Graham Armitage
  • Grant
  • GreySoul
  • Henry H
  • IamSmooth
  • In memory of Leo Powning
  • Jacob Cash
  • James Howells
  • James Pawson
  • Jeff Greenfield
  • Jeff Thomas
  • Jesse Frost
  • Jim Mitchell
  • jlr134
  • Joe Mastroianni
  • John Forcina
  • John Oberg
  • John Willcutt
  • Jon Newcomb
  • klugesmith
  • Leslie Wright
  • Lutz Hoffman
  • Mads Barnkob
  • Martin King
  • Mats Karlsson
  • Matt Gibson
  • Matthew Guidry
  • mbd
  • Michael D'Angelo
  • Mikkel
  • mileswaldron
  • mister_rf
  • Neil Foster
  • Nick de Smith
  • Nick Soroka
  • nicklenorp
  • Nik
  • Norman Stanley
  • Patrick Coleman
  • Paul Brodie
  • Paul Jordan
  • Paul Montgomery
  • Ped
  • Peter Krogen
  • Peter Terren
  • PhilGood
  • Richard Feldman
  • Robert Bush
  • Royce Bailey
  • Scott Fusare
  • Scott Newman
  • smiffy
  • Stella
  • Steven Busic
  • Steve Conner
  • Steve Jones
  • Steve Ward
  • Sulaiman
  • Thomas Coyle
  • Thomas A. Wallace
  • Thomas W
  • Timo
  • Torch
  • Ulf Jonsson
  • vasil
  • Vaxian
  • vladi mazzilli
  • wastehl
  • Weston
  • William Kim
  • William N.
  • William Stehl
  • Wesley Venis
The aforementioned have contributed financially to the continuing triumph of 4hv.org. They are deserving of my most heartfelt thanks.
Forums
4hv.org :: Forums :: Computer Science
<< Previous thread | Next thread >>   

USB 3.0 Programming in VB (simple question regarding calling functions)

Author Post
Linas
Sat Dec 31 2016, 10:45AM Print View
Registered Member #1143
Joined: Sun Nov 25 2007, 04:55PM
Location: Vilnius, Lithuania
Posts: 721
Hello,
For the fun i try to write and test all USB 3.0 functions from D3xx library.

So far get number of devices and was able to open and get handle. Now i want to toggle GPIO to see how much speed i can get between transfers. Because in my original program if i can't get faster than 1ms between transfers ( very short ones ) I will use FT232 in MPSSE mode that can be connected directly to ARM.

Problem i am facing is something wrong with my call or definition of function, can any one spot the problem ?

In programming manual:

FT_STATUS FT_EnableGPIO(FT_HANDLE ftHandle, UINT32 u32Mask, UINT32 u32Dir)

in VB i have to declare it:

Private Declare Function FT_EnableGPIO Lib "C:\FTD3XX.dll" Alias "FT_EnableGPIO" (ByVal pftHandle As ULong, ByValMask As ULong, ByValDir As ULong) As Integer

And i call it like this:

Private ftHandle As Integer = 0
Private ftStatus As Integer = 0
Dim Flags As UInt32 = &H10

ftStatus = FT_Create(Index, Flags, ftHandle)
Sleep(1000)
Flags = 2
ftStatus = FT_EnableGPIO(ftHandle, Flags, Flags)

Note that i get correct FTHandle, so this is not a problem, problem arises than i call FT_EnableGPIO, debugger says:





Does any one know how to fix this ? Millions Thanks :)
Back to top

Moderators: Chris Russell, Noelle, Alex, Tesladownunder, Dave Marshall, Bjørn, Dave Billington, Steve Conner, Wolfram, Kizmo, Mads Barnkob

Jump:     Back to top

Powered by e107 Forum System
 
Legal Information
This site is powered by e107, which is released under the GNU GPL License. All work on this site, except where otherwise noted, is licensed under a Creative Commons Attribution-ShareAlike 2.5 License. By submitting any information to this site, you agree that anything submitted will be so licensed. Please read our Disclaimer and Policies page for information on your rights and responsibilities regarding this site.