//--------------------------------------------------------------------------
// 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;
}
}
}
//--------------------------------------------------------------------------
// Send 8 bits of communication to the 1-Wire Net and verify that the
// 8 bits read from the 1-Wire Net is the same (write operation).
// The parameter 'sendbyte' least significant 8 bits are used.
//
// 'portnum' - number 0 to MAX_PORTNUM-1. This number is provided to
// indicate the symbolic port number.
// 'sendbyte' - 8 bits to send (least significant byte)
//
// Returns: TRUE: bytes written and echo was the same
// FALSE: echo was not the same
//
SMALLINT owTouchByteUSB(int portnum, SMALLINT sendbyte)
{
SETUP_PACKET setup;
ushort nBytes;
uchar buf[2];
SMALLINT ret = 0;
// make sure strong pullup is not on
if (USBLevel[portnum] == MODE_STRONG5)
owLevelUSB(portnum, MODE_NORMAL);
// set to do touchbyte
setup.RequestTypeReservedBits = 0x40;
setup.Request = COMM_CMD;
setup.Value = COMM_BYTE_IO | COMM_IM;
setup.Index = sendbyte & 0xFF;
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_ADAPTER_ERROR);
AdapterRecover(portnum);
return 0;
}
else
{
// success, read the result
nBytes = 1;
if (DS2490Read(usb_dev_handle_list[portnum], buf, &nBytes))
return buf[0];
else
{
OWERROR(OWERROR_ADAPTER_ERROR);
AdapterRecover(portnum);
return 0;
}
}
}
//--------------------------------------------------------------------------
// Send 8 bits of communication to the 1-Wire Net and verify that the
// 8 bits read from the 1-Wire Net is the same (write operation).
// The parameter 'sendbyte' least significant 8 bits are used.
//
// 'portnum' - number 0 to MAX_PORTNUM-1. This number is provided to
// indicate the symbolic port number.
// 'sendbyte' - 8 bits to send (least significant byte)
//
// Returns: TRUE: bytes written and echo was the same
// FALSE: echo was not the same
//
SMALLINT owTouchByte(int portnum, SMALLINT sendbyte)
{
SETUP_PACKET setup;
ULONG nOutput = 0;
WORD nBytes;
BYTE buf[2];
// make sure strong pullup is not on
if (USBLevel[portnum] == MODE_STRONG5)
owLevel(portnum, MODE_NORMAL);
// set to do touchbyte
setup.RequestTypeReservedBits = 0x40;
setup.Request = COMM_CMD;
setup.Value = COMM_BYTE_IO | COMM_IM;
setup.Index = sendbyte & 0xFF;
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_ADAPTER_ERROR);
AdapterRecover(portnum);
return 0;
}
else
{
// success, read the result
nBytes = 1;
if (DS2490Read(usbhnd[portnum], buf, &nBytes))
return buf[0];
else
{
OWERROR(OWERROR_ADAPTER_ERROR);
AdapterRecover(portnum);
return 0;
}
}
}
//--------------------------------------------------------------------------
// Set the 1-Wire Net communucation speed.
//
// 'portnum' - number 0 to MAX_PORTNUM-1. This number is provided to
// indicate the symbolic 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)
{
SETUP_PACKET setup;
ULONG nOutput = 0;
// set to change the speed
setup.RequestTypeReservedBits = 0x40;
setup.Request = MODE_CMD;
setup.Value = MOD_1WIRE_SPEED;
setup.Index = ((new_speed == MODE_OVERDRIVE) ? ONEWIREBUSSPEED_OVERDRIVE : ONEWIREBUSSPEED_FLEXIBLE) & 0x00FF;
setup.Length = 0x00;
setup.DataOut = FALSE;
// call the driver
if (!DeviceIoControl(usbhnd[portnum],
DS2490_IOCTL_VENDOR,
&setup,
sizeof(SETUP_PACKET),
NULL,
0,
&nOutput,
NULL))
{
// failure
OWERROR(OWERROR_ADAPTER_ERROR);
AdapterRecover(portnum);
return USBSpeed[portnum];
}
else
{
// success, read the result
USBSpeed[portnum] = new_speed;
return new_speed;
}
}
//--------------------------------------------------------------------------
// Set the 1-Wire Net communucation speed.
//
// 'portnum' - number 0 to MAX_PORTNUM-1. This number is provided to
// indicate the symbolic port number.
// 'new_speed' - new speed defined as
// MODE_NORMAL 0x00
// MODE_OVERDRIVE 0x01
//
// Returns: current 1-Wire Net speed
//
SMALLINT owSpeedUSB(int portnum, SMALLINT new_speed)
{
SETUP_PACKET setup;
SMALLINT ret = 0;
// set to change the speed
setup.RequestTypeReservedBits = 0x40;
setup.Request = MODE_CMD;
setup.Value = MOD_1WIRE_SPEED;
setup.Index = ((new_speed == MODE_OVERDRIVE) ? ONEWIREBUSSPEED_OVERDRIVE : ONEWIREBUSSPEED_FLEXIBLE) & 0x00FF;
setup.Length = 0x00;
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_ADAPTER_ERROR);
AdapterRecover(portnum);
return USBSpeed[portnum];
}
else
{
// success, read the result
USBSpeed[portnum] = new_speed;
return new_speed;
}
}
//--------------------------------------------------------------------------
// This procedure creates a fixed 480 microseconds 12 volt pulse
// on the 1-Wire Net for programming EPROM iButtons.
//
// 'portnum' - number 0 to MAX_PORTNUM-1. This number is provided to
// indicate the symbolic port number.
//
// Returns: TRUE successful
// FALSE program voltage not available
//
SMALLINT owProgramPulseUSB(int portnum)
{
SETUP_PACKET setup;
SMALLINT ret = 0;
// check if Vpp available
if (!USBVpp[portnum])
return FALSE;
// make sure strong pullup is not on
if (USBLevel[portnum] == MODE_STRONG5)
owLevelUSB(portnum, MODE_NORMAL);
// send the pulse (already enabled)
setup.RequestTypeReservedBits = 0x40;
setup.Request = COMM_CMD;
setup.Value = COMM_PULSE | COMM_IM | COMM_TYPE;
setup.Index = 0;
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_ADAPTER_ERROR);
AdapterRecover(portnum);
return FALSE;
}
else
return TRUE;
}
//--------------------------------------------------------------------------
// This procedure creates a fixed 480 microseconds 12 volt pulse
// on the 1-Wire Net for programming EPROM iButtons.
//
// 'portnum' - number 0 to MAX_PORTNUM-1. This number is provided to
// indicate the symbolic port number.
//
// Returns: TRUE successful
// FALSE program voltage not available
//
SMALLINT owProgramPulse(int portnum)
{
SETUP_PACKET setup;
ULONG nOutput = 0;
// check if Vpp available
if (!USBVpp[portnum])
return FALSE;
// make sure strong pullup is not on
if (USBLevel[portnum] == MODE_STRONG5)
owLevel(portnum, MODE_NORMAL);
// send the pulse (already enabled)
setup.RequestTypeReservedBits = 0x40;
setup.Request = COMM_CMD;
setup.Value = COMM_PULSE | COMM_IM | COMM_TYPE;
setup.Index = 0;
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_ADAPTER_ERROR);
AdapterRecover(portnum);
return FALSE;
}
else
return TRUE;
}
//---------------------------------------------------------------------------
// Attempt to acquire the specified 1-Wire net.
//
// 'port_zstr' - zero terminated port name. For this platform
// use format 'DS2490-X' where X is the port number.
//
// Returns: port number or -1 if not successful in setting up the port.
//
int owAcquireEx(char *port_zstr)
{
int portnum = 0, portstringlength = 0, i = 0, ret = 0;
int portnumfromstring; //character escape sequence
//char portSubStr[] = "\\\\.\\DS2490-";
char portSubStr[] = "DS2490-";
char *retStr;
char tempStr[4];
// initialize tempStr
memset(&tempStr[0],0x00,4);
// convert supplied string to uppercase
for (i = 0;i < (int)strlen(port_zstr); i++)
{
port_zstr[i] = (char)toupper((char)port_zstr[i]);
}
// strip off portnumber from supplied string and put it in tempStr
portstringlength = strlen(port_zstr) - strlen(&portSubStr[0]); // get port string length
if ((portstringlength < 0) || (portstringlength > 3))
{
// error portstring length can only be 3 characters (i.e., "0" to "999")
OWERROR(OWERROR_PORTNUM_ERROR);
return -1;
}
for (i=0;i<portstringlength;i++) // tempStr holds the "stripped" port number (as a string)
{
//tempStr[i] = port_zstr[i+11];
tempStr[i] = port_zstr[i + 7];
}
// check the port string and grab the port number from it.
retStr = strstr (port_zstr, &portSubStr[0]); // check for "DS2490-"
if (retStr == NULL)
{
// error - owAcquire called with invalid port string
OWERROR(OWERROR_PORTNUM_ERROR);
return -1;
}
portnumfromstring = atoi(&tempStr[0]);
if (portnumfromstring == 0) // port could be zero, so make an extra check befor failing
{
ret = memcmp(&tempStr[0],"0",1);
if (ret != 0)
{
// error - portnum supplied is not numeric
OWERROR(OWERROR_PORTNUM_ERROR);
return -1;
}
}
// set portnum to the one provided
portnum = portnumfromstring;
if(!usbhnd_init) // check to see the USB bus has been setup properly
{
// discover all DS2490s on USB bus...
DS2490Discover();
usbhnd_init = 1;
}
// check to see if the portnumber is valid
if ((usb_num_devices < portnum) || (portnum == 0))
{
// error - Attempted to select invalid port number
OWERROR(OWERROR_LIBUSB_NO_ADAPTER_FOUND);
return -1;
}
// check to see if opening the device is valid
if (usb_dev_handle_list[portnum] != NULL)
{
// error - USB Device already open
OWERROR(OWERROR_LIBUSB_DEVICE_ALREADY_OPENED);
return -1;
}
// open the device
usb_dev_handle_list[portnum] = usb_open(usb_dev_list[portnum]);
if (usb_dev_handle_list[portnum] == NULL)
{
// Failed to open usb device
OWERROR(OWERROR_LIBUSB_OPEN_FAILED);
return -1;
}
// set the configuration
if (usb_set_configuration(usb_dev_handle_list[portnum], 1))
{
// Failed to set configuration
OWERROR(OWERROR_LIBUSB_SET_CONFIGURATION_ERROR);
usb_close(usb_dev_handle_list[portnum]); // close handle
return -1;
}
// claim the interface
if (usb_claim_interface(usb_dev_handle_list[portnum], 0))
{
// Failed to claim interface
//printf("%s\n", usb_strerror());
OWERROR(OWERROR_LIBUSB_CLAIM_INTERFACE_ERROR);
usb_close(usb_dev_handle_list[portnum]); // close handle
return -1;
}
// set the alt interface
if (usb_set_altinterface(usb_dev_handle_list[portnum], 3))
{
// Failed to set altinterface
//printf("%s\n", usb_strerror());
OWERROR(OWERROR_LIBUSB_SET_ALTINTERFACE_ERROR);
usb_release_interface(usb_dev_handle_list[portnum], 0); // release interface
usb_close(usb_dev_handle_list[portnum]); // close handle
return -1;
}
// clear USB endpoints before doing anything with them.
usb_clear_halt(usb_dev_handle_list[portnum], DS2490_EP3);
usb_clear_halt(usb_dev_handle_list[portnum], DS2490_EP2);
usb_clear_halt(usb_dev_handle_list[portnum], DS2490_EP1);
// verify adapter is working
if (!AdapterRecover(portnum))
{
usb_release_interface(usb_dev_handle_list[portnum], 0); // release interface
usb_close(usb_dev_handle_list[portnum]); // close handle
return -1;
}
// reset the 1-Wire
owTouchReset(portnum);
return portnum;
}
//--------------------------------------------------------------------------
// Read 1 bit of communication from the 1-Wire net and verify that the
// response matches the 'applyPowerResponse' bit and apply power delivery
// to the 1-Wire net. Note that some implementations may apply the power
// first and then turn it off if the response is incorrect.
//
// 'portnum' - number 0 to MAX_PORTNUM-1. This number was provided to
// OpenCOM to indicate the port number.
// 'applyPowerResponse' - 1 bit response to check, if correct then start
// power delivery
//
// Returns: TRUE: bit written and response correct, strong pullup now on
// FALSE: response incorrect
//
SMALLINT owReadBitPower(int portnum, SMALLINT applyPowerResponse)
{
SETUP_PACKET setup;
ULONG nOutput = 0;
WORD nBytes;
BYTE buf[2];
// make sure strong pullup is not on
if (USBLevel[portnum] == MODE_STRONG5)
owLevel(portnum, MODE_NORMAL);
// enable the strong pullup pulse
setup.RequestTypeReservedBits = 0x40;
setup.Request = MODE_CMD;
setup.Value = MOD_PULSE_EN;
setup.Index = ENABLEPULSE_SPUE;
setup.Length = 0x00;
setup.DataOut = FALSE;
// call the driver
if (!DeviceIoControl(usbhnd[portnum],
DS2490_IOCTL_VENDOR,
&setup,
sizeof(SETUP_PACKET),
NULL,
0,
&nOutput,
NULL))
{
// failure
OWERROR(OWERROR_ADAPTER_ERROR);
AdapterRecover(portnum);
return FALSE;
}
// set to do touchbit
setup.RequestTypeReservedBits = 0x40;
setup.Request = COMM_CMD;
setup.Value = COMM_BIT_IO | COMM_IM | COMM_SPU | COMM_D;
setup.Index = 0;
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_ADAPTER_ERROR);
AdapterRecover(portnum);
return FALSE;
}
else
{
// now strong pullup is enabled
USBLevel[portnum] = MODE_STRONG5;
// success, read the result
nBytes = 1;
if (DS2490Read(usbhnd[portnum], buf, &nBytes))
{
// check response
if (buf[0] != applyPowerResponse)
{
owLevel(portnum, MODE_NORMAL);
return FALSE;
}
else
return TRUE;
}
else
{
OWERROR(OWERROR_ADAPTER_ERROR);
AdapterRecover(portnum);
return FALSE;
}
}
}
//--------------------------------------------------------------------------
// Set the 1-Wire Net line level. The values for new_level are
// as follows:
//
// 'portnum' - number 0 to MAX_PORTNUM-1. This number is provided to
// indicate the symbolic port number.
// 'new_level' - new level defined as
// MODE_NORMAL 0x00
// MODE_STRONG5 0x02
// MODE_PROGRAM 0x04 (not supported in this version)
// MODE_BREAK 0x08 (not supported in chip)
//
// Returns: current 1-Wire Net level
//
SMALLINT owLevel(int portnum, SMALLINT new_level)
{
SETUP_PACKET setup;
ULONG nOutput = 0;
// Turn off infinite strong pullup?
if ((new_level == MODE_NORMAL) && (USBLevel[portnum] == MODE_STRONG5))
{
if (DS2490HaltPulse(usbhnd[portnum]))
USBLevel[portnum] = MODE_NORMAL;
}
// Turn on infinite strong5 pullup?
else if ((new_level == MODE_STRONG5) && (USBLevel[portnum] == MODE_NORMAL))
{
// assume duration set to infinite during setup of device
// enable the pulse
setup.RequestTypeReservedBits = 0x40;
setup.Request = MODE_CMD;
setup.Value = MOD_PULSE_EN;
setup.Index = ENABLEPULSE_SPUE;
setup.Length = 0x00;
setup.DataOut = FALSE;
// call the driver
if (!DeviceIoControl(usbhnd[portnum],
DS2490_IOCTL_VENDOR,
&setup,
sizeof(SETUP_PACKET),
NULL,
0,
&nOutput,
NULL))
{
// failure
OWERROR(OWERROR_ADAPTER_ERROR);
AdapterRecover(portnum);
return USBLevel[portnum];
}
// start the pulse
setup.RequestTypeReservedBits = 0x40;
setup.Request = COMM_CMD;
setup.Value = COMM_PULSE | COMM_IM;
setup.Index = 0;
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_ADAPTER_ERROR);
AdapterRecover(portnum);
return USBLevel[portnum];
}
else
{
// success, read the result
USBLevel[portnum] = new_level;
return new_level;
}
}
// unsupported
else if (new_level != USBLevel[portnum])
{
OWERROR(OWERROR_FUNC_NOT_SUP);
return USBLevel[portnum];
}
// success, return the current level
return USBLevel[portnum];
}
//--------------------------------------------------------------------------
// Read 1 bit of communication from the 1-Wire net and verify that the
// response matches the 'applyPowerResponse' bit and apply power delivery
// to the 1-Wire net. Note that some implementations may apply the power
// first and then turn it off if the response is incorrect.
//
// 'portnum' - number 0 to MAX_PORTNUM-1. This number was provided to
// OpenCOM to indicate the port number.
// 'applyPowerResponse' - 1 bit response to check, if correct then start
// power delivery
//
// Returns: TRUE: bit written and response correct, strong pullup now on
// FALSE: response incorrect
//
SMALLINT owReadBitPowerUSB(int portnum, SMALLINT applyPowerResponse)
{
SETUP_PACKET setup;
ushort nBytes;
uchar buf[2];
SMALLINT ret = 0;
// make sure strong pullup is not on
if (USBLevel[portnum] == MODE_STRONG5)
owLevelUSB(portnum, MODE_NORMAL);
// enable the strong pullup pulse
setup.RequestTypeReservedBits = 0x40;
setup.Request = MODE_CMD;
setup.Value = MOD_PULSE_EN;
setup.Index = ENABLEPULSE_SPUE;
setup.Length = 0x00;
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_ADAPTER_ERROR);
AdapterRecover(portnum);
return FALSE;
}
// set to do touchbit
setup.RequestTypeReservedBits = 0x40;
setup.Request = COMM_CMD;
setup.Value = COMM_BIT_IO | COMM_IM | COMM_SPU | COMM_D;
setup.Index = 0;
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_ADAPTER_ERROR);
AdapterRecover(portnum);
return FALSE;
}
else
{
// now strong pullup is enabled
USBLevel[portnum] = MODE_STRONG5;
// success, read the result
nBytes = 1;
if (DS2490Read(usb_dev_handle_list[portnum], buf, &nBytes))
{
// check response
if (buf[0] != applyPowerResponse)
{
owLevelUSB(portnum, MODE_NORMAL);
return FALSE;
}
else
return TRUE;
}
else
{
OWERROR(OWERROR_ADAPTER_ERROR);
AdapterRecover(portnum);
return FALSE;
}
}
}
//--------------------------------------------------------------------------
// Set the 1-Wire Net line level. The values for new_level are
// as follows:
//
// 'portnum' - number 0 to MAX_PORTNUM-1. This number is provided to
// indicate the symbolic port number.
// 'new_level' - new level defined as
// MODE_NORMAL 0x00
// MODE_STRONG5 0x02
// MODE_PROGRAM 0x04 (not supported in this version)
// MODE_BREAK 0x08 (not supported in chip)
//
// Returns: current 1-Wire Net level
//
SMALLINT owLevelUSB(int portnum, SMALLINT new_level)
{
SETUP_PACKET setup;
SMALLINT ret = 0;
// Turn off infinite strong pullup?
if ((new_level == MODE_NORMAL) && (USBLevel[portnum] == MODE_STRONG5))
{
if (DS2490HaltPulse(usb_dev_handle_list[portnum]))
USBLevel[portnum] = MODE_NORMAL;
}
// Turn on infinite strong5 pullup?
else if ((new_level == MODE_STRONG5) && (USBLevel[portnum] == MODE_NORMAL))
{
// assume duration set to infinite during setup of device
// enable the pulse
setup.RequestTypeReservedBits = 0x40;
setup.Request = MODE_CMD;
setup.Value = MOD_PULSE_EN;
setup.Index = ENABLEPULSE_SPUE;
setup.Length = 0x00;
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_ADAPTER_ERROR);
AdapterRecover(portnum);
return USBLevel[portnum];
}
// start the pulse
setup.RequestTypeReservedBits = 0x40;
setup.Request = COMM_CMD;
setup.Value = COMM_PULSE | COMM_IM;
setup.Index = 0;
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_ADAPTER_ERROR);
AdapterRecover(portnum);
return USBLevel[portnum];
}
else
{
// success, read the result
USBLevel[portnum] = new_level;
return new_level;
}
}
// unsupported
else if (new_level != USBLevel[portnum])
{
OWERROR(OWERROR_FUNC_NOT_SUP);
return USBLevel[portnum];
}
// success, return the current level
return USBLevel[portnum];
}
//--------------------------------------------------------------------------
// The 'owNext' function does a general search. This function
// continues from the previos search state. The search state
// can be reset by using the 'owFirst' function.
// This function contains one parameter 'alarm_only'.
// When 'alarm_only' is TRUE (1) the find alarm command
// 0xEC is sent instead of the normal search command 0xF0.
// Using the find alarm command 0xEC will limit the search to only
// 1-Wire devices that are in an 'alarm' state.
//
// 'portnum' - number 0 to MAX_PORTNUM-1. This number is provided to
// indicate the symbolic port number.
// 'do_reset' - TRUE (1) perform reset before search, FALSE (0) do not
// perform reset before search.
// 'alarm_only' - TRUE (1) the find alarm command 0xEC is
// sent instead of the normal search command 0xF0
//
// Returns: TRUE (1) : when a 1-Wire device was found and it's
// Serial Number placed in the global SerialNum[portnum]
// FALSE (0): when no new device was found. Either the
// last search was the last device or there
// are no devices on the 1-Wire Net.
//
SMALLINT owNext(int portnum, SMALLINT do_reset, SMALLINT alarm_only)
{
SETUP_PACKET setup;
short rt=FALSE,i,ResetSearch=FALSE;
BYTE rom_buf[16];
BYTE ret_buf[16];
WORD buf_len;
uchar lastcrc8;
WORD nBytes = 8;
ULONG nOutput = 0;
long limit;
STATUS_PACKET status;
BYTE nResult;
// if the last call was the last one
if (LastDevice[portnum])
{
// reset the search
LastDiscrepancy[portnum] = 0;
LastDevice[portnum] = FALSE;
LastFamilyDiscrepancy[portnum] = 0;
return FALSE;
}
// check if reset first is requested
if (do_reset)
{
// reset the 1-wire
// extra reset if last part was a DS1994/DS2404 (due to alarm)
if ((SerialNum[portnum][0] & 0x7F) == 0x04)
owTouchReset(portnum);
// if there are no parts on 1-wire, return FALSE
if (!owTouchReset(portnum))
{
// reset the search
LastDiscrepancy[portnum] = 0;
LastFamilyDiscrepancy[portnum] = 0;
OWERROR(OWERROR_NO_DEVICES_ON_NET);
return FALSE;
}
}
// build the rom number to put to the USB chip
for (i = 0; i < 8; i++)
rom_buf[i] = SerialNum[portnum][i];
// take into account LastDiscrepancy
if (LastDiscrepancy[portnum] != 0xFF)
{
if (LastDiscrepancy[portnum] > 0)
bitacc(WRITE_FUNCTION,1,(short)(LastDiscrepancy[portnum] - 1),rom_buf);
for (i = LastDiscrepancy[portnum]; i < 64; i++)
bitacc(WRITE_FUNCTION,0,i,rom_buf);
}
// put the ROM ID in EP2
nBytes = 8;
if (!DS2490Write(usbhnd[portnum], rom_buf, &nBytes))
{
AdapterRecover(portnum);
return FALSE;
}
// setup for search command call
setup.RequestTypeReservedBits = 0x40;
setup.Request = COMM_CMD;
setup.Value = COMM_SEARCH_ACCESS | COMM_IM | COMM_SM | COMM_F | COMM_RTS;
// the number of devices to read (1) with the search command
setup.Index = 0x0100 | (((alarm_only) ? 0xEC : 0xF0) & 0x00FF);
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
AdapterRecover(portnum);
return FALSE;
}
// set a time limit
limit = msGettick() + 200;
// loop to wait on EP3 ready (device will go idle)
do
{
// read the status to see if the pulse has been stopped
if (!DS2490GetStatus(usbhnd[portnum], &status, &nResult))
{
// failure
break;
}
else
{
// look for any fail conditions
for (i = 0; i < nResult; i++)
{
// only check for error conditions when the condition is not a ONEWIREDEVICEDETECT
if (status.CommResultCodes[i] != ONEWIREDEVICEDETECT)
{
// failure
break;
}
}
}
}
while (((status.StatusFlags & STATUSFLAGS_IDLE) == 0) &&
(limit > msGettick()));
// check results of the waite for idel
if ((status.StatusFlags & STATUSFLAGS_IDLE) == 0)
{
AdapterRecover(portnum);
return FALSE;
}
// check for data
if (status.ReadBufferStatus > 0)
{
// read the load
buf_len = 16;
if(!DS2490Read(usbhnd[portnum], ret_buf, &buf_len))
{
AdapterRecover(portnum);
return FALSE;
}
// success, get rom and desrepancy
LastDevice[portnum] = (buf_len == 8);
// extract the ROM (and check crc)
setcrc8(portnum,0);
for (i = 0; i < 8; i++)
{
SerialNum[portnum][i] = ret_buf[i];
lastcrc8 = docrc8(portnum,ret_buf[i]);
}
// crc OK and family code is not 0
if (!lastcrc8 && SerialNum[portnum][0])
{
// loop through the descrepancy to get the pointers
for (i = 0; i < 64; i++)
{
// if descrepancy
if (bitacc(READ_FUNCTION,0,i,&ret_buf[8]) &&
(bitacc(READ_FUNCTION,0,i,&ret_buf[0]) == 0))
{
LastDiscrepancy[portnum] = i + 1;
}
}
rt = TRUE;
}
else
{
ResetSearch = TRUE;
rt = FALSE;
}
}
// check if need to reset search
if (ResetSearch)
{
LastDiscrepancy[portnum] = 0xFF;
LastDevice[portnum] = FALSE;
for (i = 0; i < 8; i++)
SerialNum[portnum][i] = 0;
}
return rt;
}
