usbKbdRead.c File Reference

#include <usbkbd.h>
#include <interrupt.h>

Functions
devcall	usbKbdRead (device *devptr, void *buf, uint len)

Function Documentation

devcall usbKbdRead	(	device *	devptr,
		void *	buf,
		uint	len
	)

Read data from a USB keyboard.

Parameters

devptr	Pointer to the device table entry for a USB keyboard.
buf	Pointer to a buffer into which to place the read data.
len	Maximum number of bytes of data to read.

Returns

On success, returns the number of bytes read, which normally is len, but may be less than len if the keyboard has been set to non-blocking mode. Returns ::SYSERR on other error (currently, only if usbKbdInit() has not yet been called).