INFICON MDC-260 Thin Film Deposition Controller - Manual (Page 140)

MDC-260 DEPOSITION CONTROLLER
COMPUTER INTERFACE 11-2
11.2 HOST API FUNCTIONS
The following is a list of the host API functions:
SI_GetNumDevices() - Returns the number of MDC-260s connected to
the host
SI_GetProductString () - Returns the USB descriptor for a given
MDC-260
SI_Open () – “Opens” an MDC-260 and returns a handle
SI_Close() - Cancels pending IO and “closes” an MDC-260
SI_Read() - Reads a block of data from an MDC-260
SI_Write() - Writes a block of data to an MDC-260
SI_SetTimeouts() - Sets read and write block timeouts
SI_GetTimeouts () - Gets read and write block timeouts
SI_SetBaudRate() - Sets the specified Baud Rate
In general, communication with the MDC-260 is initiated by making a call to
SI_GetNumDevices. This call will return the number of MDC-260s currently
connected the host. This number is then used as a range when calling
SI_GetProductString to build a list of MDC-260 serial numbers or description
strings.
To access an MDC-260, it must first be “opened” by a call to SI_Open using an
index determined from the call to SI_GetNumDevices. The SI_Open function will
return a handle to the MDC-260 that is to be used in all subsequent accesses.
Data I/O is performed using the SI_Write and SI_Read functions. When I/O
operations are complete, the MDC-260 is “closed” by a call to SI_Close.
Below is a detailed look at each of the host API functions:
SI_GetNumDevices
Description: This function returns the number of MDC-260s currently
connected to the host.
Prototype: SI_STATUS SI_GetNumDevices (LPDWORD
NumDevices)
Parameters: 1. NumDevices – Address of a DWORD variable that will
contain the number of MDC-260s connected on return.
Return Value: SI_STATUS = SI_SUCCESS (0x00) or
SI_DEVICE_NOT_FOUND (0xFF) or
SI_INVALID_PARAMETER (0x01)