//--------------------------------------------------------------------------
// Set the MicroLAN communucation speed.
//
// 'NewSpeed' - new speed defined as
// MODE_NORMAL 0x00
// MODE_OVERDRIVE 0x01
//
// Returns: current MicroLAN speed
//
int MLanSpeed(int NewSpeed)
{
uchar sendpacket[5];
short sendlen=0;
int rt = FALSE;
// check if change from current mode
if (((NewSpeed == MODE_OVERDRIVE) &&
(USpeed != SPEEDSEL_OD)) ||
((NewSpeed == MODE_NORMAL) &&
(USpeed != SPEEDSEL_FLEX)))
{
if (NewSpeed == MODE_OVERDRIVE)
{
// if overdrive then switch to 115200 baud
if (DS2480ChangeBaud(PARMSET_57600) == PARMSET_57600)
{
USpeed = SPEEDSEL_OD;
rt = TRUE;
}
}
else if (NewSpeed == MODE_NORMAL)
{
// else normal so set to 9600 baud
if (DS2480ChangeBaud(PARMSET_9600) == PARMSET_9600)
{
USpeed = SPEEDSEL_FLEX;
rt = TRUE;
}
}
// if baud rate is set correctly then change DS2480 speed
if (rt)
{
// check if correct mode
if (UMode != MODSEL_COMMAND)
{
UMode = MODSEL_COMMAND;
sendpacket[sendlen++] = MODE_COMMAND;
}
// proceed to set the DS2480 communication speed
sendpacket[sendlen++] = CMD_COMM | FUNCTSEL_SEARCHOFF | USpeed;
// send the packet
if (!WriteCOM(sendlen,sendpacket))
{
rt = FALSE;
// lost communication with DS2480 then reset
DS2480Detect();
}
}
}
// return the current speed
return (USpeed == SPEEDSEL_OD) ? MODE_OVERDRIVE : MODE_NORMAL;
}
//--------------------------------------------------------------------------
// Set the 1-Wire Net communucation speed.
//
// 'portnum' - number 0 to MAX_PORTNUM-1. This number was provided to
// OpenCOM to indicate the port number.
// 'new_speed' - new speed defined as
// MODE_NORMAL 0x00
// MODE_OVERDRIVE 0x01
//
// Returns: current 1-Wire Net speed
//
SMALLINT owSpeed(int portnum, SMALLINT new_speed)
{
uchar sendpacket[5];
uchar sendlen=0;
uchar rt = FALSE;
// check if change from current mode
if (((new_speed == MODE_OVERDRIVE) &&
(USpeed[portnum] != SPEEDSEL_OD)) ||
((new_speed == MODE_NORMAL) &&
(USpeed[portnum] != SPEEDSEL_FLEX)))
{
if (new_speed == MODE_OVERDRIVE)
{
// if overdrive then switch to 115200 baud
if (DS2480ChangeBaud(portnum,PARMSET_115200) == PARMSET_115200)
{
USpeed[portnum] = SPEEDSEL_OD;
rt = TRUE;
}
}
else if (new_speed == MODE_NORMAL)
{
// else normal so set to 9600 baud
if (DS2480ChangeBaud(portnum,PARMSET_9600) == PARMSET_9600)
{
USpeed[portnum] = SPEEDSEL_FLEX;
rt = TRUE;
}
}
// if baud rate is set correctly then change DS2480 speed
if (rt)
{
// check if correct mode
if (UMode[portnum] != MODSEL_COMMAND)
{
UMode[portnum] = MODSEL_COMMAND;
sendpacket[sendlen++] = MODE_COMMAND;
}
// proceed to set the DS2480 communication speed
sendpacket[sendlen++] = CMD_COMM | FUNCTSEL_SEARCHOFF | USpeed[portnum];
// send the packet
if (!WriteCOM(portnum,sendlen,sendpacket))
{
OWERROR(OWERROR_WRITECOM_FAILED);
rt = FALSE;
// lost communication with DS2480 then reset
DS2480Detect(portnum);
}
}
}
// return the current speed
return (USpeed[portnum] == SPEEDSEL_OD) ? MODE_OVERDRIVE : MODE_NORMAL;
}
