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Add libx52_is_connected function

pull/22/head
nirenjan 2020-06-08 17:22:33 -07:00
parent 0cf977b751
commit 2d46b395a1
2 changed files with 31 additions and 1 deletions
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27
lib/libx52/libx52.h
View File

@ -1,7 +1,7 @@
/*
* Saitek X52 Pro MFD & LED driver
*
* Copyright (C) 2012-2017 Nirenjan Krishnan (nirenjan@nirenjan.org)
* Copyright (C) 2012-2020 Nirenjan Krishnan (nirenjan@nirenjan.org)
*
* SPDX-License-Identifier: GPL-2.0-only WITH Classpath-exception-2.0
*/
@ -22,6 +22,7 @@
#include <time.h>
#include <stdint.h>
#include <stdbool.h>
#ifdef __cplusplus
extern "C" {
@ -298,6 +299,9 @@ void libx52_exit(libx52_device *dev);
* errors are encountered during device enumeration, it will return an
* appropriate \ref libx52_error_code.
*
* If this function is called after it has already connected to a joystick,
* then it will re-enumerate the bus and ensure that it is still connected.
*
* @param[in] dev Pointer to the device context
*
* @returns \ref libx52_error_code indicating status
@ -317,6 +321,27 @@ int libx52_connect(libx52_device *dev);
*/
int libx52_disconnect(libx52_device *dev);
/**
* @brief Check if joystick is connected
*
* This function reports if it is possible to try to communicate with a
* supported joystick. The application can communicate with the joystick,
* only if the following conditions are met.
*
* 1. The joystick is plugged in and powered up.
* 2. The application has called \ref libx52_connect to connect to the joystick.
*
* This function, however, does not check if the joystick is physically
* connected. A call to \ref libx52_update or \ref libx52_vendor_command will
* return an error of \ref LIBX52_ERROR_NO_DEVICE if the joystick has either
* been disconnected, or \ref libx52_connect was never called.
*
* @param[in] dev Pointer to the device context
*
* @returns Boolean indicating if the internal device handle is valid.
*/
bool libx52_is_connected(libx52_device *dev);
/** @} */
/**

5
lib/libx52/x52_core.c
View File

@ -44,6 +44,11 @@ static int libx52_device_is_x52pro(uint16_t idProduct)
return (idProduct == X52_PROD_X52PRO);
}
bool libx52_is_connected(libx52_device *dev)
{
return (dev && dev->hdl);
}
int libx52_disconnect(libx52_device *dev)
{
if (!dev) {