esp570.c File Reference

Implementation of esp570 sensor initialization. More...

#include "util/u_logging.h"
#include "uvc/uvc_interface.h"
#include "esp570.h"
#include <string.h>
#include <errno.h>

Include dependency graph for esp570.c:

Macros
#define	ESP570_EXTENSION_UNIT   4
#define	ESP570_SELECTOR_I2C   2
#define	ESP570_SELECTOR_UNKNOWN_3   3
#define	ESP570_SELECTOR_EEPROM   5

Functions
static int	uvc_xu_set_get_cur (libusb_device_handle *devh, int selector, uint8_t *buf, uint8_t len)
	Calls SET_CUR and then GET_CUR on a given selector of the eSP570 UVC extension unit.
int	esp570_eeprom_read (libusb_device_handle *devh, uint16_t addr, uint8_t *data, uint8_t len)
	Reads a buffer from the Microchip 24AA128 EEPROM.
int	esp570_i2c_read (libusb_device_handle *devh, uint8_t addr, uint8_t reg, uint16_t *val)
	Performs a 16-bit read operation on the I2C bus.
int	esp570_i2c_write (libusb_device_handle *devh, uint8_t addr, uint8_t reg, uint16_t val)
	Performs a 16-bit write operation on the I2C bus.
int	esp570_setup_unknown_3 (libusb_device_handle *devh)
	Calls SET_CUR and GET_CUR on the extension unit's selector 3 with values captured from the Oculus Windows drivers to setup the device.

Detailed Description

Implementation of esp570 sensor initialization.

Author

Philipp Zabel phili.nosp@m.pp.z.nosp@m.abel@.nosp@m.gmai.nosp@m.l.com

TheOnlyJoey joeyf.nosp@m.erwe.nosp@m.da@gm.nosp@m.ail..nosp@m.com

Jan Schmidt jan@c.nosp@m.entr.nosp@m.icula.nosp@m.r.co.nosp@m.m

Beyley Cardellio ep1cm.nosp@m.1n10.nosp@m.n123@.nosp@m.gmai.nosp@m.l.com

Function Documentation

esp570_eeprom_read()

int esp570_eeprom_read	(	libusb_device_handle *	devh,
		uint16_t	addr,
		uint8_t *	buf,
		uint8_t	len
	)

Reads a buffer from the Microchip 24AA128 EEPROM.

Parameters

[in]	devh	libusb device handle
[in]	addr	Address to read from
[out]	buf	Buffer to read into
[in]	len	Number of bytes to read (max 32)

Returns

0 on success, negative error code on failure

References U_LOG_E, and uvc_xu_set_get_cur().

esp570_i2c_read()

int esp570_i2c_read	(	libusb_device_handle *	devh,
		uint8_t	addr,
		uint8_t	reg,
		uint16_t *	val
	)

Performs a 16-bit read operation on the I2C bus.

Parameters

[in]	devh	libusb device handle
[in]	addr	I2C address
[in]	reg	Register to read from
[out]	val	Value read

Returns

0 on success, negative error code on failure

References U_LOG_W, and uvc_xu_set_get_cur().

esp570_i2c_write()

int esp570_i2c_write	(	libusb_device_handle *	devh,
		uint8_t	addr,
		uint8_t	reg,
		uint16_t	val
	)

Performs a 16-bit write operation on the I2C bus.

Parameters

[in]	devh	libusb device handle
[in]	addr	I2C address
[in]	reg	Register to write to
[in]	val	Value to write

Returns

0 on success, negative error code on failure

References U_LOG_W, and uvc_xu_set_get_cur().

esp570_setup_unknown_3()

int esp570_setup_unknown_3

(

libusb_device_handle *

devh

)

Calls SET_CUR and GET_CUR on the extension unit's selector 3 with values captured from the Oculus Windows drivers to setup the device.

I have no idea what these mean.

Parameters

[in]

devh

libusb device handle

Returns

0 on success, negative error code on failure

References U_LOG_W, and uvc_xu_set_get_cur().

uvc_xu_set_get_cur()

static int uvc_xu_set_get_cur ( libusb_device_handle *  devh, int  selector, uint8_t *  buf, uint8_t  len  )

static

Calls SET_CUR and then GET_CUR on a given selector of the eSP570 UVC extension unit.

Parameters

[in]	devh	libusb device handle
[in]	selector	Selector to call on
[in]	buf	Buffer to send with SET_CUR, and receive with GET_CUR
[in]	len	Length of the buffer

Returns

0 on success, negative error code on failure

References U_LOG_E.

Referenced by esp570_eeprom_read(), esp570_i2c_read(), esp570_i2c_write(), and esp570_setup_unknown_3().