diff options
Diffstat (limited to 'nuttx/configs/fire-stm32v2/src/up_buttons.c')
-rw-r--r-- | nuttx/configs/fire-stm32v2/src/up_buttons.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/nuttx/configs/fire-stm32v2/src/up_buttons.c b/nuttx/configs/fire-stm32v2/src/up_buttons.c new file mode 100644 index 000000000..e0f500b77 --- /dev/null +++ b/nuttx/configs/fire-stm32v2/src/up_buttons.c @@ -0,0 +1,161 @@ +/**************************************************************************** + * configs/fire-stm32v2/src/up_buttons.c + * + * Copyright (C) 2012 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 <stdint.h> + +#include <arch/board/board.h> +#include "fire-internal.h" + +#ifdef CONFIG_ARCH_BUTTONS + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ +/* Pin configuration for each Shenzhou button. This array is indexed by + * the BUTTON_* definitions in board.h + */ + +static const uint16_t g_buttons[NUM_BUTTONS] = +{ + GPIO_BTN_KEY1, GPIO_BTN_KEY1 +}; + +/**************************************************************************** + * 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 GPIO pins as inputs. NOTE that EXTI interrupts are + * configured for some pins but NOT used in this file + */ + + stm32_configgpio(GPIO_BTN_KEY1); + stm32_configgpio(GPIO_BTN_KEY2); +} + +/**************************************************************************** + * Name: up_buttons + ****************************************************************************/ + +uint8_t up_buttons(void) +{ + uint8_t ret = 0; + + /* Check that state of each key. A LOW value means that the key is pressed, */ + + if (!stm32_gpioread(GPIO_BTN_KEY1)) + { + ret |= BUTTON_KEY1_BIT; + } + + if (!stm32_gpioread(GPIO_BTN_KEY2)) + { + ret |= BUTTON_KEY2_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) +{ + uint16_t gpio; + + if (id == BUTTON_KEY1) + { + gpio = GPIO_KEY1; + } + else if (id == BUTTON_KEY2) + { + gpio = GPIO_KEY2; + } + else + { + return NULL; + } + + return stm32_gpiosetevent(gpio, true, true, true, irqhandler); +} +#endif +#endif /* CONFIG_ARCH_BUTTONS */ |