Lighting USB OpenDMX FTD2XX DMXking
本文关键字:DMXking FTD2XX OpenDMX USB Lighting | 更新日期: 2023-09-27 17:54:55
几个简短的问题。我有一个DMX王USB照明控制器,我想控制。
它基于Open DMX协议(来自Entec),该协议提供了一个c#类。我已经将设备插入RGB罐,如果我用驱动程序测试USB设备,它连接到COM4,当我将他们的软件切换到传输模式时,我可以设置单独的DMX通道。
使用他们的OpenDMX类,有一些修改(核心是相同的,我刚刚添加了一些额外的错误检查,我可以定位设备,查询它的信息等。当我打开设备时,我得到一个手柄。我可以用FT_Write写入设备,但无论我怎么做,灯都不会亮。
下面是一些相关的代码片段:
public static byte[] buffer;
[DllImport("FTD2XX.dll")]
public static extern FT_STATUS FT_Open(UInt32 uiPort, ref uint ftHandle);
[DllImport("FTD2XX.dll")]
public static extern FT_STATUS FT_Write(uint ftHandle, IntPtr lpBuffer, UInt32 dwBytesToRead, ref UInt32 lpdwBytesWritten);
public static void writeData()
{
while (!done)
{
try
{
initOpenDMX();
status = FT_SetBreakOn(handle);
status = FT_SetBreakOff(handle);
bytesWritten = write(handle, buffer, buffer.Length);
if (bytesWritten == 0)
{
break;
}
System.Threading.Thread.Sleep(25);
}
catch (Exception)
{
break;
}
}
Connected = false;
done = false;
}
所有状态返回为FT_Ok, bytesWritten返回为512(此USB控制器上的通道数)
我一直在想我错过了一些东西,比如将设备设置为传输模式或类似的(它只有一个DMX插座)
public static void initOpenDMX()
{
status = FT_ResetDevice(handle);
status = FT_SetDivisor(handle, (char)12); // set baud rate
status = FT_SetDataCharacteristics(handle, BITS_8, STOP_BITS_2, PARITY_NONE);
status = FT_SetFlowControl(handle, (char)FLOW_NONE, 0, 0);
status = FT_ClrRts(handle);
status = FT_SetLatencyTimer(handle, (byte)40);
status = FT_Purge(handle, PURGE_TX);
status = FT_Purge(handle, PURGE_RX);
}
我也尝试了Entec OpenDMX类,没有任何修改,它似乎也没有做任何事情。
只是想强调他们的控制软件工作正常,所以灯和控制器是兼容的。我认为在我使用FTD2xx的方式中缺少了一些东西。没有错误通过(一切都是FT_OK),所以这表明DLL正在工作-特别是因为我可以使用FT_ListDevices和FT_GetDeviceInfo方法查询设备。
任何想法?
加雷思
为了解决这个问题,我给制造商发了电子邮件。结果发现,这个设备不是OpenDMX,实际上是dmxproousb协议是非常相似的,它是基于FTDI芯片,这就是为什么代码部分工作,但它有一个微控制器。我将c++示例控制器文件转换为c#,并使其全部工作。如果这种情况再次出现,我很高兴分享dmxproousb的c#代码,但没有支持。我已经通过电子邮件将代码发送给制造商(dmxking),并在github上放置了一份副本:https://github.com/agrath/Sniper.Lighting.Dmx
谢谢你的帮助
我将Hippy的VB版本通过VB到c#的机械转换器运行,找到了一个键的区别。FT_WRITE使用字符串将数据传递给非托管代码。c#类使用指向字节数组的IPtr。
这个版本适合我:
using System;
using System.Runtime.InteropServices;
using System.Threading;
// based on Hippy's VB Example
// http://members.westnet.com.au/rowanmac/opendmx.html#tx
// Working link: https://web.archive.org/web/20150217155014/http://members.westnet.com.au:80/rowanmac/opendmx.html
namespace Test
{
class Program
{
[DllImport("FTD2XX.DLL", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int FT_Open(short intDeviceNumber, ref int lngHandle);
[DllImport("FTD2XX.DLL", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int FT_Close(int lngHandle);
[DllImport("FTD2XX.DLL", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int FT_SetDivisor(int lngHandle, int div);
[DllImport("FTD2XX.DLL", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int FT_Read(int lngHandle, string lpszBuffer, int lngBufferSize, ref int lngBytesReturned);
[DllImport("FTD2XX.DLL", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int FT_Write(int lngHandle, string lpszBuffer, int lngBufferSize, ref int lngBytesWritten);
[DllImport("FTD2XX.DLL", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int FT_Write(int lngHandle, IntPtr lpBuffer, int lngBufferSize, ref int lngBytesWritten);
[DllImport("FTD2XX.DLL", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int FT_SetBaudRate(int lngHandle, int lngBaudRate);
[DllImport("FTD2XX.DLL", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int FT_SetDataCharacteristics(int lngHandle, byte byWordLength, byte byStopBits, byte byParity);
[DllImport("FTD2XX.DLL", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int FT_SetFlowControl(int lngHandle, short intFlowControl, byte byXonChar, byte byXoffChar);
[DllImport("FTD2XX.DLL", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int FT_ResetDevice(int lngHandle);
[DllImport("FTD2XX.DLL", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int FT_SetDtr(int lngHandle);
[DllImport("FTD2XX.DLL", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int FT_ClrDtr(int lngHandle);
[DllImport("FTD2XX.DLL", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int FT_SetRts(int lngHandle);
[DllImport("FTD2XX.DLL", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int FT_ClrRts(int lngHandle);
[DllImport("FTD2XX.DLL", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int FT_GetModemStatus(int lngHandle, ref int lngModemStatus);
[DllImport("FTD2XX.DLL", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int FT_Purge(int lngHandle, int lngMask);
[DllImport("FTD2XX.DLL", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int FT_GetStatus(int lngHandle, ref int lngRxBytes, ref int lngTxBytes, ref int lngEventsDWord);
[DllImport("FTD2XX.DLL", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int FT_GetQueueStatus(int lngHandle, ref int lngRxBytes);
[DllImport("FTD2XX.DLL", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int FT_GetEventStatus(int lngHandle, ref int lngEventsDWord);
[DllImport("FTD2XX.DLL", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int FT_SetChars(int lngHandle, byte byEventChar, byte byEventCharEnabled, byte byErrorChar, byte byErrorCharEnabled);
[DllImport("FTD2XX.DLL", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int FT_SetTimeouts(int lngHandle, int lngReadTimeout, int lngWriteTimeout);
[DllImport("FTD2XX.DLL", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int FT_SetBreakOn(int lngHandle);
[DllImport("FTD2XX.DLL", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
private static extern int FT_SetBreakOff(int lngHandle);
// FTDI Constants
const short FT_OK = 0;
const short FT_INVALID_HANDLE = 1;
const short FT_DEVICE_NOT_FOUND = 2;
const short FT_DEVICE_NOT_OPENED = 3;
const short FT_IO_ERROR = 4;
const short FT_INSUFFICIENT_RESOURCES = 5;
// Word Lengths
const byte FT_BITS_8 = 8;
// Stop Bits
const byte FT_STOP_BITS_2 = 2;
// Parity
const byte FT_PARITY_NONE = 0;
// Flow Control
const byte FT_FLOW_NONE = 0x0;
// Purge rx and tx buffers
const byte FT_PURGE_RX = 1;
const byte FT_PURGE_TX = 2;
public static int handle=0;
public static byte[] buffer = new byte[4]; // can be up to 512, shorter is faster
private static string lpszBuffer=""+ (char) 0 + (char) 64 + (char) 64+ (char) 0;
static void Main(string[] args)
{
init();
}
public static string init()
{
short n = 0;
// ==== ATTEMPT TO OPEN DEVICE ====
if (FT_Open(n, ref handle) != FT_OK)
{
return "FTTD Not Found";
}
// ==== PREPARE DEVICE FOR DMX TRANSMISSION ====
// reset the device
if (FT_ResetDevice(handle) != FT_OK)
{
return "Failed To Reset Device!";
}
// get an ID from the widget from jumpers
// GetID(ref n);
// set the baud rate
if (FT_SetDivisor(handle, 12) != FT_OK)
{
return "Failed To Set Baud Rate!";
}
// shape the line
if (FT_SetDataCharacteristics(handle, FT_BITS_8, FT_STOP_BITS_2, FT_PARITY_NONE) != FT_OK)
{
return "Failed To Set Data Characteristics!";
}
// no flow control
if (FT_SetFlowControl(handle, FT_FLOW_NONE, 0, 0) != FT_OK)
{
return "Failed to set flow control!";
}
// set bus transiever to transmit enable
if (FT_ClrRts(handle) != FT_OK)
{
return "Failed to set RS485 to send!";
}
// Clear TX & RX buffers
if (FT_Purge(handle, FT_PURGE_TX) != FT_OK)
{
return "Failed to purge TX buffer!";
}
// empty buffers
if (FT_Purge(handle, FT_PURGE_RX) != FT_OK)
{
return "Failed to purge RX buffer!";
}
setDmxValue(0, 0); // should always be zero
setDmxValue(1, 64);
setDmxValue(2, 64);
setDmxValue(3, 0);
Thread thread = new Thread(new ThreadStart(writeDataThread));
thread.Start();
return "Ok";
}
// init
public static void setDmxValue(int channel, byte value)
{
buffer[channel] = value;
lpszBuffer="";
for (int i = 0; i < buffer.Length; ++i)
{
lpszBuffer += (char)buffer[i];
}
}
public static void writeDataThread()
{
bool done = false;
int lngBytesWritten=0;
while (!done)
{
FT_SetBreakOn(handle);
FT_SetBreakOff(handle);
FT_Write(handle, lpszBuffer, buffer.Length, ref lngBytesWritten);
System.Threading.Thread.Sleep(50);
}
}
}
}
我在open dmx站点上编写了c#类。它是基于用VB编写的Hippy的Open DMX驱动程序。
//旧链接:
http://members.westnet.com.au/rowanmac/opendmx.html tx
//工作链接:https://web.archive.org/web/20150217155014/http://members.westnet.com.au:80/rowanmac/opendmx.html
c#类在FDDI芯片上没有初始化。
这件事已经折磨我很多年了。
我对FT_SetFlowControl有怀疑。在VB应用程序中,第二个参数是一个短整型。但是,在c#类中对它的等效函数的任何调用,只有在第二个形参被强制转换为char类型时才有效。
[DllImport("FTD2XX.dll")]
public static extern FT_STATUS FT_SetFlowControl(uint ftHandle, UInt16 usFlowControl, byte uXon, byte uXoff);
我修复了Marshal的问题。复制
public static void writeDataThread(int Length)
{
int lngBytesWritten = 0;
IntPtr pnt = Marshal.AllocHGlobal(Length);
Marshal.Copy(buffer, 0, pnt, Length);
FT_SetBreakOn(handle);
FT_SetBreakOff(handle);
string StartCode = null;
FT_Write(handle, StartCode, 1, ref lngBytesWritten);
FT_Write(handle, pnt, Length, ref lngBytesWritten);
}
FTDI芯片除了串行端口外还有GPIO引脚。希望文档告诉您是否需要设置这些。函数是FT_SetBitMode
。文档在这里。