Add support for a general user LED lower-half driver
This commit is contained in:
Gregory Nutt
parent
0dea00177e
commit
fc91ded815
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@ -11052,4 +11052,10 @@
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* Rename ioexpander/ directories to discrete/. This expands the
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namespace so that other discrete I/O drivers can reside there as
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well (2015-11-01).
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* drivers/discrete/userled_upper.c and include/discrete/userled.h: Add
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a generic character driver that may be used by applications to write
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to board LEDs (2015-11-01).
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* drivers/discrete/userled_lower.c: Add a generic lower-half user LED
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driver that may be used by any board that supports the standard
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board user LED interfaces (2015-11-01).
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@ -65,7 +65,7 @@ config USERLED_LOWER
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1. The board implementation must provide the LED
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interfaces as defined in include/nuttx/board.h
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2. The board.h header file must provide the definition
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NUM_USERLED, and
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BOARD_NLEDS, and
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3. The board.h header file must not include any other
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header files that are not accessibble in this context
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(such as those in arch/<arch>/src/<chip>) UNLESS those
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@ -0,0 +1,141 @@
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/****************************************************************************
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* drivers/discrete/userled_lower.c
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*
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* Copyright (C) 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <assert.h>
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#include <debug.h>
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#include <nuttx/board.h>
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#include <nuttx/discrete/userled.h>
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#undef __KERNEL__
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#include <arch/board/board.h>
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#if CONFIG_USERLED_LOWER
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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static userled_set_t userled_supported(FAR const struct userled_lowerhalf_s *lower);
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static void userled_led(FAR const struct userled_lowerhalf_s *lower,
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static void userled_ledset(FAR const struct userled_lowerhalf_s *lower,
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userled_set_t ledset);
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* This is the user LED lower half driver interface */
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static const struct userled_lowerhalf_s g_userled_lower =
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{
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.ll_supported = userled_supported,
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.ll_led = userled_led,
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.ll_ledset = userled_ledset,
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};
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: userled_supported
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*
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* Description:
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* Return the set of LEDs supported by the board
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*
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****************************************************************************/
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static userled_set_t userled_supported(FAR const struct userled_lowerhalf_s *lower)
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{
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ivdbg("BOARD_NLEDS: %02x\n", BOARD_NLEDS);
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return (userled_set_t)((1 << BOARD_NLEDS) - 1);
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}
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/****************************************************************************
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* Name: userled_led
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*
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* Description:
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* Set the current state of one LED
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*
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****************************************************************************/
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static void userled_led(FAR const struct userled_lowerhalf_s *lower,
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int led, bool ledon)
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{
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board_userled(led, ledon);
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}
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/****************************************************************************
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* Name: userled_led
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*
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* Description:
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* Set the state of all LEDs
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*
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****************************************************************************/
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static void userled_ledset(FAR const struct userled_lowerhalf_s *lower,
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userled_set_t ledset)
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{
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board_userled_all(ledset);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: userled_lower_initialize
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*
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* Description:
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* Initialize the generic LED lower half driver, bind it and register
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* it with the upper half LED driver as devname.
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*
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****************************************************************************/
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int userled_lower_initialize(FAR const char *devname)
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{
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board_userled_initialize();
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return userled_register(devname, &g_userled_lower);
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}
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#endif /* CONFIG_USERLED_LOWER */
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@ -1,5 +1,5 @@
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/****************************************************************************
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* drivers/button_upper.c
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* drivers/discrete/userled_upper.c
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*
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* Copyright (C) 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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@ -1,5 +1,5 @@
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/****************************************************************************
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* drivers/button_upper.c
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* drivers/input/button_upper.c
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*
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* Copyright (C) 2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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@ -43,6 +43,8 @@
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#include <nuttx/config.h>
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#include <nuttx/fs/ioctl.h>
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#ifdef CONFIG_ARCH_HAVE_LEDS
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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@ -177,9 +179,23 @@ extern "C"
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int userled_register(FAR const char *devname,
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FAR const struct userled_lowerhalf_s *lower);
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/****************************************************************************
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* Name: userled_lower_initialize
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*
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* Description:
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* Initialize the generic LED lower half driver, bind it and register
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* it with the upper half LED driver as devname.
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*
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****************************************************************************/
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#ifdef CONFIG_USERLED_LOWER
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int userled_lower_initialize(FAR const char *devname);
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#endif
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* CONFIG_ARCH_HAVE_LEDS */
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#endif /* __INCLUDE_NUTTX_DISCRETE_USERLED_H */
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