DK-TM4C129X: Add support for buttons
This commit is contained in:
Gregory Nutt
parent
c79bc06988
commit
0c698a7121
@ -152,18 +152,25 @@
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#define LED_PANIC 3 /* ON OFF OFF (flashing 2Hz) */
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/* Button definitions ***************************************************************/
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/* The TMC4C123G LaunchPad has a two buttons:
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/* There are three push buttons on the board.
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*
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* BOARD_SW1 -- Connected to PF4
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* BOARD_SW2 -- Connected to PF0
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* --- ------------ -----------------
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* Pin Pin Function Jumper
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* --- ------------ -----------------
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* PP1 Select SW4 J37 pins 1 and 2
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* PN3 Up SW2 J37 pins 3 and 4
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* PE5 Down SW3 J37 pins 5 and 6
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* --- ------------ -----------------
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*/
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#define BUTTON_SW1 0
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#define BUTTON_SW2 1
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#define NUM_BUTTONS 2
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#define BUTTON_SW2 0
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#define BUTTON_SW3 1
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#define BUTTON_SW4 2
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#define NUM_BUTTONS 3
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#define BUTTON_SW1_BIT (1 << BUTTON_SW1)
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#define BUTTON_SW2_BIT (1 << BUTTON_SW2)
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#define BUTTON_SW3_BIT (1 << BUTTON_SW3)
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#define BUTTON_SW4_BIT (1 << BUTTON_SW4)
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/* Pin Multiplexing Disambiguation **************************************************/
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@ -47,6 +47,10 @@ else
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CSRCS += tm4c_userleds.c
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endif
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ifeq ($(CONFIG_ARCH_BUTTONS),y)
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CSRCS += tm4c_buttons.c
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endif
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ifeq ($(CONFIG_NSH_ARCHINIT),y)
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CSRCS += tm4c_nsh.c
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endif
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@ -82,7 +82,24 @@
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#define GPIO_LED_B (GPIO_FUNC_OUTPUT | GPIO_VALUE_ONE | GPIO_PORTQ | GPIO_PIN_7)
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/* Button definitions ***************************************************************/
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/* Buttons -- To be provided */
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/* There are three push buttons on the board.
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*
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* --- ------------ -----------------
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* Pin Pin Function Jumper
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* --- ------------ -----------------
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* PP1 Select SW4 J37 pins 1 and 2
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* PN3 Up SW2 J37 pins 3 and 4
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* PE5 Down SW3 J37 pins 5 and 6
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* --- ------------ -----------------
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*
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* Interrupts are supported only on port P and Q so only SW4 interrupts are supported.
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*/
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#define GPIO_SW2 (GPIO_FUNC_INPUT | GPIO_PORTE | GPIO_PIN_5)
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#define GPIO_SW3 (GPIO_FUNC_INPUT | GPIO_PORTN | GPIO_PIN_3)
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#define GPIO_SW4 (GPIO_FUNC_INPUT | GPIO_INT_BOTHEDGES | GPIO_PORTP | GPIO_PIN_1)
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#define IRQ_SW4 TIVA_IRQ_GPIOP_1
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/************************************************************************************
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* Public Functions
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191
configs/dk-tm4c129x/src/tm4c_buttons.c
Normal file
191
configs/dk-tm4c129x/src/tm4c_buttons.c
Normal file
@ -0,0 +1,191 @@
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/****************************************************************************
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* configs/dk-tm4c/src/tm4c_buttons.c
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*
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* Copyright (C) 2014 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 <stdint.h>
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#include <nuttx/arch.h>
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#include <arch/irq.h>
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#include <arch/board/board.h>
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#include "dk-tm4c129x.h"
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#ifdef CONFIG_ARCH_BUTTONS
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/****************************************************************************
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* Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* Pin configuration for each STM3210E-EVAL button. This array is indexed by
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* the BUTTON_* and JOYSTICK_* definitions in board.h
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*/
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static const uint32_t g_buttons[NUM_BUTTONS] =
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{
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GPIO_SW2, GPIO_SW3, GPIO_SW4
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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
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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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****************************************************************************/
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void board_button_initialize(void)
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{
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int i;
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/* Configure the GPIO pins as inputs. */
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for (i = 0; i < NUM_BUTTONS; i++)
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{
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tiva_configgpio(g_buttons[i]);
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}
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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 = 0;
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int i;
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/* Check that state of each key */
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for (i = 0; i < NUM_BUTTONS; i++)
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{
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/* A LOW value means that the key is pressed. */
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bool released = tiva_gpioread(g_buttons[i]);
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/* Accumulate the set of depressed (not released) keys */
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if (!released)
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{
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ret |= (1 << i);
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}
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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. After
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* that, board_buttons() may be called to collect the current state of all
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* 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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* After board_button_initialize() has been called, board_buttons() may be called to
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* collect the state of all buttons. board_buttons() returns an 8-bit bit set
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* with each bit associated with a button. See the BUTTON_*_BIT and JOYSTICK_*_BIT
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* definitions in board.h for the meaning of each bit.
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*
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* board_button_irq() may be called to register an interrupt handler that will
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* be called when a button is depressed or released. The ID value is a
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* button enumeration value that uniquely identifies a button resource. See the
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* BUTTON_* and JOYSTICK_* definitions in board.h for the meaning of enumeration
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* value. The previous interrupt handler address is returned (so that it may
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* restored, if so desired).
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*
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************************************************************************************/
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#if defined(CONFIG_ARCH_IRQBUTTONS) && !defined(CONFIG_TIVA_DISABLE_GPIOP_IRQS)
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xcpt_t board_button_irq(int id, xcpt_t irqhandler)
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{
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static xcpt_t handler = NULL;
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xcpt_t oldhandler = handler;
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irqstate_t flags;
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int ret;
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/* Interrupts are supported only on ports P and Q and, hence, only on button SW4 */
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if (id >= BUTTON_SW4)
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{
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/* The following should be atomic */
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flags = irqsave();
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/* Detach and disable the button interrupt */
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up_disable_irq(IRQ_SW4);
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irq_detach(IRQ_SW4);
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handler = NULL;
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/* Attach the new handler if so requested */
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if (irqhandler)
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{
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ret = irq_attach(IRQ_SW4, irqhandler);
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if (ret == OK)
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{
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handler = irqhandler;
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up_enable_irq(IRQ_SW4);
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}
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}
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irqrestore(flags);
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}
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return oldhandler;
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}
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#endif
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#endif /* CONFIG_ARCH_BUTTONS */
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