diff options
-rw-r--r-- | nuttx/configs/zkit-arm-1769/include/board.h | 10 | ||||
-rw-r--r-- | nuttx/configs/zkit-arm-1769/src/up_buttons.c | 213 |
2 files changed, 218 insertions, 5 deletions
diff --git a/nuttx/configs/zkit-arm-1769/include/board.h b/nuttx/configs/zkit-arm-1769/include/board.h index e6d486bf2..92ac58946 100644 --- a/nuttx/configs/zkit-arm-1769/include/board.h +++ b/nuttx/configs/zkit-arm-1769/include/board.h @@ -190,11 +190,11 @@ #define BOARD_BUTTON_5 4 #define BOARD_NUM_BUTTONS 5 -#define BOARD_BUTTON_BUTTON1_BIT (1 << BOARD_BUTTON_1) -#define BOARD_BUTTON_BUTTON2_BIT (1 << BOARD_BUTTON_2) -#define BOARD_BUTTON_BUTTON3_BIT (1 << BOARD_BUTTON_3) -#define BOARD_BUTTON_BUTTON4_BIT (1 << BOARD_BUTTON_4) -#define BOARD_BUTTON_BUTTON5_BIT (1 << BOARD_BUTTON_5) +#define BOARD_BUTTON1_BIT (1 << BOARD_BUTTON_1) +#define BOARD_BUTTON2_BIT (1 << BOARD_BUTTON_2) +#define BOARD_BUTTON3_BIT (1 << BOARD_BUTTON_3) +#define BOARD_BUTTON4_BIT (1 << BOARD_BUTTON_4) +#define BOARD_BUTTON5_BIT (1 << BOARD_BUTTON_5) /* Alternate pin selections *********************************************************/ /* Pin Description On Board Connector diff --git a/nuttx/configs/zkit-arm-1769/src/up_buttons.c b/nuttx/configs/zkit-arm-1769/src/up_buttons.c new file mode 100644 index 000000000..2422f5080 --- /dev/null +++ b/nuttx/configs/zkit-arm-1769/src/up_buttons.c @@ -0,0 +1,213 @@ +/**************************************************************************** + * configs/zkit-arm-1769/src/up_buttons.c + * arch/arm/src/board/up_buttons.c + * + * Copyright (C) 2011 Zilogic Systems. All rights reserved. + * Author: Kannan <code@zilogic.com> + * + * Based on configs/stm3210e-eval/src/up_buttons.c + * + * Copyright (C) 2009, 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * 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 <errno.h> +#include <debug.h> +#include <nuttx/irq.h> +#include <nuttx/arch.h> +#include <arch/irq.h> +#include <arch/board/board.h> + +#include "up_arch.h" +#include "up_internal.h" +#include "lpc17_gpio.h" +#include "zkitarm_internal.h" + +#ifdef CONFIG_ARCH_BUTTONS + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ +/* Pin configuration for each zkit-arm-1769 button. This array is indexed by + * BOARD_NUM_BUTTONS in board.h + */ + +static const uint16_t g_buttons[BOARD_NUM_BUTTONS] = +{ + ZKITARM_KEY1, ZKITARM_KEY2, ZKITARM_KEY3, ZKITARM_KEY4, ZKITARM_KEY5 +}; + +/* Old KEY5 interrupt handler */ + +static xcpt_t g_oldhandler; + +/**************************************************************************** + * 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) +{ + int i; + + /* Configure the GPIO pins as inputs. NOTE that EXTI interrupts are + * configured for some pins but NOT used in this file + */ + + for (i = 0; i < BOARD_NUM_BUTTONS; i++) + { + lpc17_configgpio(g_buttons[i]); + } +} + +/**************************************************************************** + * Name: up_buttons + ****************************************************************************/ + +uint8_t up_buttons(void) +{ + uint8_t ret = 0; + bool released; + int i; + + /* Check that state of each key */ + + for (i = 0; i < BOARD_NUM_BUTTONS; i++) + { + released = lpc17_gpioread(g_buttons[i]); + + /* Accumulate set of depressed keys */ + + if (!released) + { + ret |= (1 << i); + } + } + + 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). + * + ************************************************************************************/ + +#if defined CONFIG_ARCH_IRQBUTTONS && CONFIG_GPIO_IRQ +xcpt_t up_irqbutton(int id, xcpt_t irqhandler) +{ + xcpt_t rethandler = NULL; + irqstate_t flags; + int ret; + + /* Interrupts are supported on KEY5 only */ + + if (id == BOARD_BUTTON_5) + { + /* Return the previous value of the interrupt handler */ + + flags = irqsave(); + rethandler = g_oldhandler; + g_oldhandler = irqhandler; + + /* Attach or detach the interrupt handler for KEY5. */ + + if (irqhandler) + { + /* Configure KEY5 as an interrupting input */ + + lpc17_configgpio(ZKITARM_INT_ KEY5); + + /* Attach the new interrupt handler and enable the interrupt */ + + ret = irq_attach(ZKITARM_KEY5_IRQ, irqhandler); + if (ret == OK) + { + up_enable_irq(ZKITARM_KEY5_IRQ); + } + } + else + { + /* Disable the interrupt and detach the handler */ + + up_disable_irq(ZKITARM_KEY5_IRQ); + (void)irq_detach(ZKITARM_KEY5_IRQ); + + /* Configure KEY5 as a non-interrupting input */ + + lpc17_configgpio(ZKITARM_KEY5); + + } + + irqrestore(flags); + } + + return rethandler; +} + +#endif +#endif /* CONFIG_ARCH_BUTTONS */ |