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Add an analog joystick driver. Initial checkin is only a little more of a clone of the discrete joystick driver and is as-of-yet untested

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This commit is contained in:
Gregory Nutt
2014-11-28 19:59:27 -06:00
parent 36ac0d2cf4
commit 2b8fe6709b
5 changed files with 940 additions and 12 deletions
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include/nuttx/input/ajoystick.h
+27 -10
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@@ -108,7 +108,7 @@
* seek() methods. The remaining driver methods behave as follows:
*
* 1) The read() method will always return a single value of size
* struct ajoy_sample_s represent the current joystick positiona and the
* struct ajoy_sample_s represent the current joystick positional and the
* state of all joystick buttons. read() never blocks.
* 2) The poll() method can be used to notify a client if there is a change
* in any of the joystick button inputs. This feature, of course,
@@ -185,6 +185,17 @@ struct ajoy_notify_s
uint8_t an_signo; /* Signal number to use in the notification */
};
/* This structure is returned by read() and provides the sample state of the
* analog joystick.
*/
struct ajoy_sample_s
{
int16_t as_x; /* X/horizontal position */
int16_t as_y; /* Y/vertical position */
ajoy_buttonset_t as_buttons; /* State of all buttons */
};
/* This is the type of the analog joystick interrupt handler used with
* the struct ajoy_lowerhalf_s enable() method.
*/
@@ -198,7 +209,8 @@ typedef CODE void (*ajoy_handler_t)
* 1) A common upper half driver that provides the common user interface to
* the joystick,
* 2) Platform-specific lower half drivers that provide the interface
* between the common upper half and the platform analog inputs.
* between the common upper half and the platform analog and discrete
* inputs.
*
* This structure defines the interface between an instance of the lower
* half driver and the common upper half driver. Such an instance is
@@ -210,17 +222,22 @@ struct ajoy_lowerhalf_s
{
/* Return the set of buttons supported on the analog joystick device */
CODE ajoy_buttonset_t (*dl_supported)(FAR const struct ajoy_lowerhalf_s *lower);
CODE ajoy_buttonset_t (*al_supported)(FAR const struct ajoy_lowerhalf_s *lower);
/* Return the current state of all analog joystick buttons */
/* Return the current state of all analog joystick position and button data */
CODE ajoy_buttonset_t (*dl_sample)(FAR const struct ajoy_lowerhalf_s *lower);
CODE int (*al_sample)(FAR const struct ajoy_lowerhalf_s *lower,
FAR struct ajoy_sample_s *sample);
/* Enable interrupts on the selecte set of joystick buttons. And empty
/* Return the current state of button data (only) */
CODE ajoy_buttonset_t (*al_buttons)(FAR const struct ajoy_lowerhalf_s *lower);
/* Enable interrupts on the selected set of joystick buttons. And empty
* set will disable all interrupts.
*/
CODE void (*dl_enable)(FAR const struct ajoy_lowerhalf_s *lower,
CODE void (*al_enable)(FAR const struct ajoy_lowerhalf_s *lower,
ajoy_buttonset_t press, ajoy_buttonset_t release,
ajoy_handler_t handler, FAR void *arg);
};
@@ -245,9 +262,9 @@ extern "C"
* Name: ajoy_register
*
* Description:
* Bind the lower half analog joystick driver to an instance of the
* upper half analog joystick driver and register the composite character
* driver as the specific device.
* Bind the lower half analog joystick driver to an instance of the upper
* half analog joystick driver and register the composite character
* driver as the specified device.
*
* Input Parameters:
* devname - The name of the analog joystick device to be registers.