TM4C123G LaunchPad: Button support from Bradlye Noyes
This commit is contained in:
Gregory Nutt
parent
f3438d0d68
commit
dcb9f4cf31
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@ -55,6 +55,10 @@ CSRCS += tm4c_at24.c
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endif
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endif
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ifeq ($(CONFIG_ARCH_BUTTONS),y)
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CSRCS += tm4c_buttons.c
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endif
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COBJS = $(CSRCS:.c=$(OBJEXT))
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SRCS = $(ASRCS) $(CSRCS)
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@ -167,8 +167,12 @@
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* BOARD_SW2 -- Connected to PF0
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*/
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#define GPIO_SW1 (GPIO_FUNC_INTERRUPT | GPIO_INT_BOTHEDGES | GPIO_PORTF | GPIO_PIN_1)
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#define GPIO_SW2 (GPIO_FUNC_INTERRUPT | GPIO_INT_BOTHEDGES | GPIO_PORTF | GPIO_PIN_1)
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#define GPIO_SW1 (GPIO_FUNC_INTERRUPT | GPIO_INT_BOTHEDGES | \
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GPIO_STRENGTH_2MA | GPIO_PADTYPE_STDWPU | GPIO_PORTF | \
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GPIO_PIN_4)
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#define GPIO_SW2 (GPIO_FUNC_INTERRUPT | GPIO_INT_BOTHEDGES | \
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GPIO_STRENGTH_2MA | GPIO_PADTYPE_STDWPU | GPIO_PORTF | \
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GPIO_PIN_0)
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/************************************************************************************
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* Public Functions
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@ -0,0 +1,167 @@
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/****************************************************************************
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* config/tm4c123g-launchpad/src/tm4c_buttons.c
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*
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* Copyright (C) 2015 Gregory Nutt. All rights reserved.
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* Author: Bradley Noyes <bradley.noyes@trd2inc.com>
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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 <debug.h>
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#include <arch/board/board.h>
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#include "tm4c123g-launchpad.h"
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#ifdef CONFIG_ARCH_BUTTONS
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Data
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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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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: board_button_initialize
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*
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* Description:
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* board_button_initialize() must be called to initialize button resources.
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* After that, board_buttons() may be called to collect the current state of
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* all buttons or board_button_irq() may be called to register button interrupt
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* handlers.
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*
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****************************************************************************/
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void board_button_initialize(void)
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{
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/* Unlock GPIOF from NMI to use it w/ buttons see Register 19 of GPIOs
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* and see table 10-10 in datasheet for pins with special considerations.
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*/
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modifyreg32(TIVA_GPIOF_LOCK, 0, GPIO_LOCK_UNLOCK);
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modifyreg32(TIVA_GPIOF_CR, 0, 0x01);
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modifyreg32(TIVA_GPIOF_LOCK, GPIO_LOCK_UNLOCK, GPIO_LOCK_LOCKED);
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/* Configure the GPIO pins as inputs. NOTE that EXTI interrupts are
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* configured for some pins but NOT used in this file
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*/
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tiva_configgpio(GPIO_SW1);
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tiva_configgpio(GPIO_SW2);
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}
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/****************************************************************************
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* Name: board_buttons
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****************************************************************************/
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uint8_t board_buttons(void)
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{
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uint8_t ret = 0x0;
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/* Check that state of each key. A LOW value means that the key is
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* pressed.
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*/
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if (!tiva_gpioread(GPIO_SW1))
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{
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ret |= (1 << GPIO_PIN_4);
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}
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if (!tiva_gpioread(GPIO_SW2))
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{
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ret |= (1 << GPIO_PIN_0);
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}
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return ret;
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}
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/*****************************************************************************
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* Button support.
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*
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* Description:
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* board_button_initialize() must be called to initialize button resources.
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* After that, board_buttons() may be called to collect the current state
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* of all buttons or board_button_irq() may be called to register button
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* interrupt handlers.
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*
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* After board_button_initialize() has been called, board_buttons() may be
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* called to collect the state of all buttons. board_buttons() returns an
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* 8-bit bit set with each bit associated with a button. See the
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* BUTTON_*_BIT and JOYSTICK_*_BIT definitions in board.h for the meaning
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* of each bit.
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*
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* board_button_irq() may be called to register an interrupt handler that
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* will be called when a button is depressed or released. The ID value is
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* a button enumeration value that uniquely identifies a button resource.
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* See the BUTTON_* and JOYSTICK_* definitions in board.h for the meaning
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* of enumeration values. The previous interrupt handler address is
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* returned (so that it may restored, if so desired).
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*
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****************************************************************************/
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#if 0
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#ifdef CONFIG_ARCH_IRQBUTTONS
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xcpt_t board_button_irq(int id, xcpt_t irqhandler)
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{
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uint16_t gpio;
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if (id == BUTTON_KEY1)
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{
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gpio = GPIO_SW1;
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}
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else if (id == BUTTON_KEY2)
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{
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gpio = GPIO_SW2;
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}
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else
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{
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return NULL;
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}
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return stm32_gpiosetevent(gpio, true, true, true, irqhandler);
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}
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#endif
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#endif // 0
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#endif /* CONFIG_ARCH_BUTTONS */
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