83Plus:Software:usb8x/Asm Interface

Many usb8x functions can be used by other programs/applications through usb8x's assembly language U_CALL interface. Macros are provded in usb8x.inc to simplify the process. The macros require a 32-byte RAM buffer defined as USBDriverCall. The U_CALL system must be initialized by the application as follows:

U_CALL_INIT CallBackRoutine

Where CallBackRoutine is a subroutine that will be called when data arrives on the USB port. If U_CALL_INIT returns carry, usb8x is not loaded on the calculator.

After the U_CALL system has been initialized with U_CALL_INIT, use the U_CALL macro to call usb8x entry points.

Available Entry Points

AutoSetup	Automatically sets up USB device
ConfigureDevice	Chooses a device configuration
DriverInit	Initialize the USB driver
DriverKill	Uninitialize the USB driver
FindDescriptor	Finds a specific descriptor in a list
FindPipe	Finds a pipe matching characteristics
GetClass	Returns the class and subclass for the current device
GetIDs	Returns product and vender IDs for current device
GetVersion	Returns the current driver version
HostInit	Initialize a USB device
HostKill	Uninitialize a USB device
IsDeviceConnected	Tests if a device is connected to the USB port
LogCustom	Adds an entry to current log file
MouseGetKey	Returns mouse movement and button presses
MouseInit	Initializes mouse driver
PipeInfo	Gets direction, type, and packet size for a pipe
ReadDescriptor	Reads a descriptor from the device
ReqData	Request data from an incoming pipe
SendControlData	Sends data to the control pipe
SendData	Send data to the device
SetupInPipe	Sets up an incoming pipe
SetupLog	Starts logger
SetupOutPipe	Sets up an outgoing pipe
StopLog	Stops logger
WaitTimerB	Precise delay