Unitech MR350MKII Barcode Reader User Manual


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}
regs.h.ah = 0;
regs.h.al = cc;
int86(0x34,&regs,&regs);
}
05 Set RTS signal of RS-232 port
Entry Parameters: AH = 5
AL = 2
DH = 0 ;set RTS to LOW
1 ;set RTS to HIGH (default)
Returned Values: None
void TC_232_RTS(int rts)
{
regs.h.ah = 5;
regs.h.al = 2;
regs.h.dh = (unsigned char)rts;
int86(0x34,&regs,&regs);
}
06 Read CTS signal of RS-232 port
Entry Parameters: AH = 6
AL = 2
Returned Values: DH = 0 ;when CTS is LOW
1 ;when CTS is HIGH
int TC_232_CTS()
{
regs.h.ah = 6;
regs.h.al = 2;
int86(0x34,&regs,&regs);
return((int)regs.h.dh);
}
NOTE:
1) If the RS-232 port is controlled by use of INT 34H, and the port acts as the
host port. You must set the protocol as ? ONE”.
RS-485 port serial I/O using INT 33H
01 Input data
Entry Parameters: AH = 1
Returned Values: 1) if a character received
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