Spellman uX SERIES, Инструкция по эксплуатации

Страница: 43 / 81

118153-001 Rev. B
18
4.3.3 USB Example Code
The following code snippet of C# code declares a USB port, calls FindTheHid()
and if it is found writes out a report. The code then waits 50ms for a response.
If a response is received the variable count is assigned the number of bytes
received.
int len; // Length of message in buf
byte buf[] = new byte[128]; // holds message to be sent
usbPort = new usbDll ();
string tmp = "" ;
string rptstr = "" ;
int c, count;
if (usbPort.FindTheHid()) // Search the list if HID devices and find
{ // the Spellman HID & PID
// Figure out how many buffers required to send report
int blocksToSend = len / 64 ;
if (len > blocksToSend * usbconst .rpt_size) block+;
for ( int iBlk = 0; iBlk < blocksToSend; iBlk++) // for each report
{
for ( int i = 0; i < len; i++) // format byte buffer as string
{
str = str + System. Convert .ToChar(buf[i]);
}
usbPort.WriteReport(str); // write report to uX
}
// Wait for report back from uX
while (timeout_cnt < 50) // Response timeout counter loop
{
rptstr = usbPort.ReadReport(); // Read report (if any from uX)
tmp = tmp + rptstr; // concatenate chars
c = rptstr.Length; // get length of string
if (rptstr.Contains(( char )0x03)) // Check for STX terminating char
{ // If found, save char count
count = tmp.Length; // and exit loop
break ;
}
if (c > 0)
{
count += c;
timeout_cnt = 0;
}
Else // if no buffer from uX increment timeout counter
{
time+;
}
Thread .Sleep(1);
}
}