//--------------------------------------------------------------------------
// Reset all of the devices on the 1-Wire Net and return the result.
//
// 'portnum' - number 0 to MAX_PORTNUM-1. This number is provided to
// indicate the symbolic port number.
//
// Returns: TRUE(1): presense pulse(s) detected, device(s) reset
// FALSE(0): no presense pulses detected
//
SMALLINT owTouchResetUSB(int portnum)
{
SETUP_PACKET setup;
SMALLINT present,vpp;
SMALLINT ret = 0;
// make sure strong pullup is not on
if (USBLevel[portnum] == MODE_STRONG5)
owLevelUSB(portnum, MODE_NORMAL);
// construct command
setup.RequestTypeReservedBits = 0x40;
setup.Request = COMM_CMD;
setup.Value = COMM_1_WIRE_RESET | COMM_F | COMM_IM | COMM_SE;
setup.Index = (USBSpeed[portnum] == MODE_OVERDRIVE) ?
ONEWIREBUSSPEED_OVERDRIVE : ONEWIREBUSSPEED_FLEXIBLE;
setup.Length = 0;
setup.DataOut = FALSE;
// call the libusb driver
ret = usb_control_msg(usb_dev_handle_list[portnum],
setup.RequestTypeReservedBits,
setup.Request,
setup.Value,
setup.Index,
NULL,
setup.Length,
TIMEOUT_LIBUSB);
if (ret < 0)
{
// failure
OWERROR(OWERROR_RESET_FAILED);
AdapterRecover(portnum);
return FALSE;
}
else
{
// extra delay for alarming DS1994/DS2404 complience
if ((FAMILY_CODE_04_ALARM_TOUCHRESET_COMPLIANCE) && (USBSpeed[portnum] != MODE_OVERDRIVE))
msDelay(5);
// success, check for shorts
if (DS2490ShortCheck(usb_dev_handle_list[portnum], &present,&vpp))
{
USBVpp[portnum] = vpp;
return present;
}
else
{
OWERROR(OWERROR_OW_SHORTED);
// short occuring
msDelay(300);
AdapterRecover(portnum);
return FALSE;
}
}
}
//--------------------------------------------------------------------------
// Reset all of the devices on the 1-Wire Net and return the result.
//
// 'portnum' - number 0 to MAX_PORTNUM-1. This number is provided to
// indicate the symbolic port number.
//
// Returns: TRUE(1): presense pulse(s) detected, device(s) reset
// FALSE(0): no presense pulses detected
//
SMALLINT owTouchReset(int portnum)
{
SETUP_PACKET setup;
ULONG nOutput = 0;
SMALLINT present,vpp;
// make sure strong pullup is not on
if (USBLevel[portnum] == MODE_STRONG5)
owLevel(portnum, MODE_NORMAL);
// construct command
setup.RequestTypeReservedBits = 0x40;
setup.Request = COMM_CMD;
setup.Value = COMM_1_WIRE_RESET | COMM_F | COMM_IM | COMM_SE;
setup.Index = (USBSpeed[portnum] == MODE_OVERDRIVE) ?
ONEWIREBUSSPEED_OVERDRIVE : ONEWIREBUSSPEED_FLEXIBLE;
setup.Length = 0;
setup.DataOut = FALSE;
// call the driver
if (!DeviceIoControl(usbhnd[portnum],
DS2490_IOCTL_VENDOR,
&setup,
sizeof(SETUP_PACKET),
NULL,
0,
&nOutput,
NULL))
{
// failure
OWERROR(OWERROR_RESET_FAILED);
AdapterRecover(portnum);
return FALSE;
}
else
{
// extra delay for alarming DS1994/DS2404 complience
if ((FAMILY_CODE_04_ALARM_TOUCHRESET_COMPLIANCE) && (USBSpeed[portnum] != MODE_OVERDRIVE))
Sleep(5);
// success, check for shorts
if (DS2490ShortCheck(usbhnd[portnum], &present,&vpp))
{
USBVpp[portnum] = vpp;
return present;
}
else
{
OWERROR(OWERROR_OW_SHORTED);
// short occuring
msDelay(300);
AdapterRecover(portnum);
return FALSE;
}
}
}
//---------------------------------------------------------------------------
// Attempt to resync and detect a DS2490
//
// 'portnum' - number 0 to MAX_PORTNUM-1. This number was provided to
// OpenCOM to indicate the port number.
//
// Returns: TRUE - DS2490 detected successfully
// FALSE - Could not detect DS2490
//
SMALLINT DS2490Detect(usb_dev_handle *hDevice)
{
SMALLINT present,vpp,ret;
SETUP_PACKET setup;
// reset the DS2490
DS2490Reset(hDevice);
// set the strong pullup duration to infinite
setup.RequestTypeReservedBits = 0x40;
setup.Request = COMM_CMD;
setup.Value = COMM_SET_DURATION | COMM_IM;
setup.Index = 0x0000;
setup.Length = 0;
setup.DataOut = FALSE;
// call the libusb driver
ret = usb_control_msg(hDevice,
setup.RequestTypeReservedBits,
setup.Request,
setup.Value,
setup.Index,
NULL,
setup.Length,
TIMEOUT_LIBUSB);
// set the 12V pullup duration to 512us
setup.RequestTypeReservedBits = 0x40;
setup.Request = COMM_CMD;
setup.Value = COMM_SET_DURATION | COMM_IM | COMM_TYPE;
setup.Index = 0x0040;
setup.Length = 0;
setup.DataOut = FALSE;
// call the libusb driver
ret = usb_control_msg(hDevice,
setup.RequestTypeReservedBits,
setup.Request,
setup.Value,
setup.Index,
NULL,
setup.Length,
TIMEOUT_LIBUSB);
// disable strong pullup, but leave program pulse enabled (faster)
setup.RequestTypeReservedBits = 0x40;
setup.Request = MODE_CMD;
setup.Value = MOD_PULSE_EN;
setup.Index = ENABLEPULSE_PRGE;
setup.Length = 0x00;
setup.DataOut = FALSE;
// call the libusb driver
ret = usb_control_msg(hDevice,
setup.RequestTypeReservedBits,
setup.Request,
setup.Value,
setup.Index,
NULL,
setup.Length,
TIMEOUT_LIBUSB);
// return result of short check
return DS2490ShortCheck(hDevice,&present,&vpp);
}
