diff options
Diffstat (limited to 'nuttx/configs/twr-k60n512/src/up_buttons.c')
-rw-r--r-- | nuttx/configs/twr-k60n512/src/up_buttons.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/nuttx/configs/twr-k60n512/src/up_buttons.c b/nuttx/configs/twr-k60n512/src/up_buttons.c new file mode 100644 index 000000000..c5f320923 --- /dev/null +++ b/nuttx/configs/twr-k60n512/src/up_buttons.c @@ -0,0 +1,168 @@ +/**************************************************************************** + * configs/twr-k60n512/src/up_buttons.c + * + * Copyright (C) 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <stdint.h> + +#include <arch/board/board.h> +#include "twrk60-internal.h" + +#ifdef CONFIG_ARCH_BUTTONS + +/**************************************************************************** + * Definitions + ****************************************************************************/ +/* The TWR-K60N512 has user buttons (plus a reset button): + * + * 1. SW1 (IRQ0) PTA19 + * 2. SW2 (IRQ1) PTE26 + */ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: up_buttoninit + * + * Description: + * up_buttoninit() must be called to initialize button resources. After + * that, up_buttons() may be called to collect the current state of all + * buttons or up_irqbutton() may be called to register button interrupt + * handlers. + * + ****************************************************************************/ + +void up_buttoninit(void) +{ + /* Configure the two buttons as inputs */ + + kinetis_pinconfig(GPIO_SW1); + kinetis_pinconfig(GPIO_SW2); +} + +/**************************************************************************** + * Name: up_buttons + ****************************************************************************/ + +uint8_t up_buttons(void) +{ + uint8_t ret = 0; + + if (kinetis_gpioread(GPIO_SW1)) + { + ret |= BUTTON_SW1_BIT; + } + + if (kinetis_gpioread(GPIO_SW2)) + { + ret |= BUTTON_SW2_BIT; + } + + return ret +} + +/************************************************************************************ + * Button support. + * + * Description: + * up_buttoninit() must be called to initialize button resources. After + * that, up_buttons() may be called to collect the current state of all + * buttons or up_irqbutton() may be called to register button interrupt + * handlers. + * + * After up_buttoninit() has been called, up_buttons() may be called to + * collect the state of all buttons. up_buttons() returns an 8-bit bit set + * with each bit associated with a button. See the BUTTON_*_BIT and JOYSTICK_*_BIT + * definitions in board.h for the meaning of each bit. + * + * up_irqbutton() may be called to register an interrupt handler that will + * be called when a button is depressed or released. The ID value is a + * button enumeration value that uniquely identifies a button resource. See the + * BUTTON_* and JOYSTICK_* definitions in board.h for the meaning of enumeration + * value. The previous interrupt handler address is returned (so that it may + * restored, if so desired). + * + ************************************************************************************/ + +#ifdef CONFIG_ARCH_IRQBUTTONS +xcpt_t up_irqbutton(int id, xcpt_t irqhandler) +{ + xcpt_t oldhandler = NULL; + uint32_t pinset; + + /* Map the button id to the GPIO bit set. */ + + if (id == BUTTON_SW1) + { + pinset = GPIO_SW1; + } + else if (id == BUTTON_SW2) + { + pinset = GPIO_SW2; + } + else + { + return NULL; + } + + /* The button has already been configured as an interrupting input (by + * up_buttoninit() above). + * + * Attach the new button handler. + */ + + oldhandler = knetis_pinirqattach(pinset, irqhandler); + + /* Then make sure that interupts are enabled on the pin */ + + kinetis_pindmaenable(pinset); + return oldhandler; +} +#endif +#endif /* CONFIG_ARCH_BUTTONS */ |