This example uses C# to interface to the U4xx. The very minimum application would be to open the USB device and transmit a single command. This example shows the code that it takes to use USBm.dll to open the U4xx device and initialize the ports.
The Class
| ⁄⁄ needed to import the .dll using System.Runtime.InteropServices; public class USBm { public static byte BitA0 = 0x00; public static byte BitA1 = 0x01; public static byte BitA2 = 0x02; public static byte BitA3 = 0x03; public static byte BitA4 = 0x04; public static byte BitA5 = 0x05; public static byte BitA6 = 0x06; public static byte BitA7 = 0x07; public static byte BitB0 = 0x08; public static byte BitB1 = 0x09; public static byte BitB2 = 0x0A; public static byte BitB3 = 0x0B; public static byte BitB4 = 0x0C; public static byte BitB5 = 0x0D; public static byte BitB6 = 0x0E; public static byte BitB7 = 0x0F; ⁄⁄ USBm.dll – C# pInvoke examples ⁄⁄ “Commands” ⁄⁄ [DllImport(“USBm.dll”, EntryPoint = “USBm_FindDevices”, CharSet = CharSet.Auto)] [DllImport(“USBm.dll”)] public static extern bool USBm_FindDevices(); [DllImport(“USBm.dll”)] public static extern int USBm_NumberOfDevices(); [DllImport(“USBm.dll”)] public static extern bool USBm_DeviceValid(int Device); [DllImport(“USBm.dll”)] public static extern bool USBm_About(StringBuilder About); [DllImport(“USBm.dll”)] public static extern bool USBm_Version(StringBuilder Version); [DllImport(“USBm.dll”)] public static extern bool USBm_Copyright(StringBuilder Copyright); [DllImport(“USBm.dll”)] public static extern bool USBm_DeviceMfr(int Device, StringBuilder Mfr); [DllImport(“USBm.dll”)] public static extern bool USBm_DeviceProd(int Device, StringBuilder Prod); [DllImport(“USBm.dll”)] public static extern int USBm_DeviceFirmwareVer(int Device); [DllImport(“USBm.dll”)] public static extern bool USBm_DeviceSer(int Device, StringBuilder dSer); [DllImport(“USBm.dll”)] public static extern int USBm_DeviceDID(int Device); [DllImport(“USBm.dll”)] public static extern int USBm_DevicePID(int Device); [DllImport(“USBm.dll”)] public static extern int USBm_DeviceVID(int Device); [DllImport(“USBm.dll”)] public static extern bool USBm_DebugString(StringBuilder DBug); [DllImport(“USBm.dll”)] public static extern bool USBm_RecentError(StringBuilder rError); [DllImport(“USBm.dll”)] public static extern bool USBm_ClearRecentError(); [DllImport(“USBm.dll”)] public static extern bool USBm_SetReadTimeout(uint TimeOut); [DllImport(“USBm.dll”)] public static extern bool USBm_ReadDevice(int Device, byte[] inBuf); [DllImport(“USBm.dll”)] public static extern bool USBm_WriteDevice(int Device, byte[] outBuf); [DllImport(“USBm.dll”)] public static extern bool USBm_CloseDevice(int Device); } |
Example of function calling
| ⁄⁄ Test USBm device attached if ( !USBm.USBm_FindDevices() ) { MessageBox.Show( string.Format(“No Device Present”), “USBm Devices”, MessageBoxButtons.OK, MessageBoxIcon.Information ); return; } ⁄⁄ implied else ⁄⁄Walk the USBm.dll functions ⁄⁄ some containers StringBuilder sb = new StringBuilder( 200 ); bool result = false; ⁄⁄ return values ⁄⁄ .DLL FindDevices returns the number of devices ⁄⁄ public static extern bool USBm_FindDevices(); result = USBm.USBm_FindDevices(); ⁄⁄ return the number of devices ⁄⁄ public static extern int USBm_NumberOfDevices(); int TotalDevices = USBm.USBm_NumberOfDevices(); int Device = TotalDevices -1; ⁄⁄ only One device is ever attached so … ⁄⁄ .DLL About info ⁄⁄ public static extern bool USBm_About(StringBuilder about ); result = USBm.USBm_About( sb ); ⁄⁄ .DLL Version info ⁄⁄ public static extern bool USBm_Version(StringBuilder Version); result = USBm.USBm_Version( sb ); ⁄⁄ .DLL Copyright info ⁄⁄ public static extern bool USBm_Copyright(StringBuilder Copyright); result = USBm.USBm_Copyright( sb ); ⁄⁄ Device Valid ⁄⁄public static extern bool USBm_DeviceValid(int Device); result = USBm.USBm_DeviceValid( Device ); ⁄⁄ Device Manufacturer ⁄⁄public static extern bool USBm_DeviceMfr(int Device, StringBuilder Mfr); result = USBm.USBm_DeviceMfr( Device, sb ); ⁄⁄ Device Product String ⁄⁄ public static extern bool USBm_DeviceProd(int Device, StringBuilder Prod); result = USBm.USBm_DeviceProd( Device, sb ); ⁄⁄ Device Firmware Version ⁄⁄ public static extern int USBm_DeviceFirmwareVer(int Device); int FirmVer = USBm.USBm_DeviceFirmwareVer(Device); ⁄⁄ Device SerialNumber [ ] ⁄⁄ public static extern bool USBm_DeviceSer(int Device, StringBuilder dSer); result = USBm.USBm_DeviceSer(Device, sb); ⁄⁄ Device DiD ⁄⁄ public static extern int USBm_DeviceDID(int Device); int DID = USBm.USBm_DeviceDID(Device); ⁄⁄ Device PiD ⁄⁄ public static extern int USBm_DevicePID(int Device); int PID = USBm.USBm_DevicePID(Device); ⁄⁄ Device ViD ⁄⁄ public static extern int USBm_DeviceVID(int Device); int VID = USBm.USBm_DeviceVID(Device); ⁄⁄ Device Debug String ⁄⁄ public static extern int USBm_DebugString(int Device); result = USBm.USBm_DebugString(sb); ⁄⁄ Device Recent Error – always returns true ⁄⁄ public static extern bool USBm_RecentError(void); result = USBm.USBm_RecentError(sb); ⁄⁄ Device Clear Recent Error ⁄⁄ public static extern bool USBm_ClearRecentError(void); result = USBm.USBm_ClearRecentError(); ⁄⁄ Device SetReadTimeout [ sixteen-bit millisecond value] ⁄⁄ public static extern bool USBm_SetReadTimeout(uint TimeOut); uint tOUT = 3000; result = USBm.USBm_SetReadTimeout(tOUT); ⁄⁄ Device WriteDevice [ 8 byte to write (device raw commands)] ⁄⁄ public static extern bool USBm_WriteDevice(int Device, ref int[] inBuf); byte[] OutBuf = { 0, 21, 3, 65, 8, 17, 60, 0 }; result = USBm.USBm_WriteDevice(Device, OutBuf); ⁄⁄ Device ReadDevice [ ] ⁄⁄ public static extern bool USBm_ReadDevice(int Device, array); byte[] InBuf = { 0, 0, 0, 0, 0, 0, 0, 0 }; result = USBm.USBm_ReadDevice(Device, InBuf); ⁄⁄ Device CloseDevice [ ] ⁄⁄ public static extern bool USBm_CloseDevice(int Device); result = USBm.USBm_CloseDevice(Device); |