usb.c File Reference

USB sample interface code using libusb. More...

#include "include/libusb/libusb/libusb.h"
#include "bbbandroidHAL.h"
#include <string.h>

Functions
ssize_t	usbInit ()
int	usbGetDevices (int ids[][8], unsigned char strings[][3][256])
void	usbClose ()

Variables
static libusb_device **	devs
static int	ret
static libusb_context *	ctx = NULL
static ssize_t	count

Detailed Description

USB sample interface code using libusb.

Author

Ankur Yadav (ankur.nosp@m.ayad.nosp@m.av@gm.nosp@m.ail..nosp@m.com)

Function Documentation

void usbClose

(

)

This function is used to close USB devices.

int usbGetDevices	(	int	ids[][8],
		unsigned char	strings[][3][256]
	)

This function takes one 2D array to store IDs (bus, device, manufacturer and vendor) for each USB device and one 3D array to store path, manufacturer descriptor and vendor descriptor. It returns 0 if successful and -1 if it fails. It is only to demonstrate and develop lsusb kind of app. Similar functions can be made using libusb for other functionalities of USB.

Parameters

ids	2D integer array argument.
strings	3D unsigned character argument.

Returns

0 if successful and -1 if it fails.

ssize_t usbInit

(

)

It creates USB session and gets number of USB devices attached and then returns number of USB devices attached.

Returns

If successful then number of USB devices attached is returned and if it fails then -1 is returned.

Variable Documentation

ssize_t count

static

To store number of devices in the list

libusb_context* ctx = NULL

static

To store libusb session

libusb_device** devs

static

pointer to pinter of device to get list of devices

int ret

static

To store return values for some functions internally