EFM32: Add buton interrupt handling for the Olimex board
This commit is contained in:
Gregory Nutt
parent
b8d841c9d2
commit
33015d6018
@ -367,6 +367,7 @@ config ARCH_BOARD_OLIMEX_EFM32G880F128_STK
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bool "Olimex EFM32G880F128 STK"
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bool "Olimex EFM32G880F128 STK"
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depends on ARCH_CHIP_EFM32G880F128
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depends on ARCH_CHIP_EFM32G880F128
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select ARCH_HAVE_BUTTONS
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select ARCH_HAVE_BUTTONS
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select ARCH_HAVE_IRQBUTTONS
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---help---
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---help---
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This options selects the Olimex EFM32G880F128 STK
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This options selects the Olimex EFM32G880F128 STK
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@ -46,6 +46,22 @@ LEDs
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The EFM32G880F128-STK has no user controllable LEDs.
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The EFM32G880F128-STK has no user controllable LEDs.
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Buttons
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=======
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The Olimex board has four buttons, BUT1-4. Each is grounded and so should
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have a weak pull-up so that it will be sensed as "1" when open and "0"
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when closed.
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--------------------- ---------------------
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PIN CONNECTIONS
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--------------------- ---------------------
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PE0/PCNT0_S0IN/U0_TX BUT1, EXT-18
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PE1/PCNT0_S1IN/U0_RX BUT2, EXT-19
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PE2/ACMP0_O BUT3, EXT-20
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E3/ACMP1_O BUT4, EXT-21
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--------------------- ---------------------
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Serial Console
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Serial Console
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==============
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==============
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@ -204,6 +204,32 @@
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#define LED_ASSERTION 6 /* LED1 + LED2 + LED3 */
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#define LED_ASSERTION 6 /* LED1 + LED2 + LED3 */
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#define LED_PANIC 7 /* N/C + N/C + N/C + LED4 */
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#define LED_PANIC 7 /* N/C + N/C + N/C + LED4 */
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/* Buttons ******************************************************************/
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/* The Olimex board has four buttons, BUT1-4. Each is grounded and so should
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* have a weak pull-up so that it will be sensed as "1" when open and "0"
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* when closed.
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*
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* --------------------- ---------------------
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* PIN CONNECTIONS
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* --------------------- ---------------------
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* PE0/PCNT0_S0IN/U0_TX BUT1, EXT-18
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* PE1/PCNT0_S1IN/U0_RX BUT2, EXT-19
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* PE2/ACMP0_O BUT3, EXT-20
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* PE3/ACMP1_O BUT4, EXT-21
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* --------------------- ---------------------
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*/
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#define BUTTON_1 0
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#define BUTTON_2 1
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#define BUTTON_3 2
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#define BUTTON_4 3
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#define NUM_BUTTONS 4
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#define BUTTON_1_BIT (1 << BUTTON_1)
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#define BUTTON_2_BIT (1 << BUTTON_2)
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#define BUTTON_3_BIT (1 << BUTTON_3)
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#define BUTTON_4_BIT (1 << BUTTON_4)
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/* Pin routing **************************************************************/
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/* Pin routing **************************************************************/
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/* UART0:
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/* UART0:
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*
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*
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@ -37,6 +37,10 @@
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CSRCS = efm32_boot.c
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CSRCS = efm32_boot.c
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ifeq ($(CONFIG_ARCH_BUTTONS),y)
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CSRCS += efm32_buttons.c
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endif
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COBJS = $(CSRCS:.c=$(OBJEXT))
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COBJS = $(CSRCS:.c=$(OBJEXT))
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SRCS = $(ASRCS) $(CSRCS)
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SRCS = $(ASRCS) $(CSRCS)
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OBJS = $(AOBJS) $(COBJS)
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OBJS = $(AOBJS) $(COBJS)
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227
configs/olimex-efm32g880f128-stk/src/efm32_buttons.c
Normal file
227
configs/olimex-efm32g880f128-stk/src/efm32_buttons.c
Normal file
@ -0,0 +1,227 @@
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/****************************************************************************
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* configs/olimex-efm32g880f128-stk/src/efm32_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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/* The Olimex board has four buttons, BUT1-4. Each is grounded and so should
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* have a weak pull-up so that it will be sensed as "1" when open and "0"
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* when closed.
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*
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* --------------------- ---------------------
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* PIN CONNECTIONS
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* --------------------- ---------------------
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* PE0/PCNT0_S0IN/U0_TX BUT1, EXT-18
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* PE1/PCNT0_S1IN/U0_RX BUT2, EXT-19
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* PE2/ACMP0_O BUT3, EXT-20
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* E3/ACMP1_O BUT4, EXT-21
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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 <nuttx/irq.h>
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#include <arch/irq.h>
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#include <arch/board/board.h>
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#include "efm32_gpio.h"
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#include "efm32g880f128-stk.h"
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#if 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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#if defined(CONFIG_EFM32_GPIO_IRQ) && defined(CONFIG_ARCH_IRQBUTTONS)
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#if 0 /* REVISIT -- See comments in board_button_irq() */
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static xcpt_t g_button_handlers[NUM_BUTTONS];
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#endif
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static const uint8_t g_button_irqs[NUM_BUTTONS];
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#endif
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static const gpio_pinset_t g_button_configs[NUM_BUTTONS] =
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{
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GPIO_BUTTON_1, GPIO_BUTTON_2, GPIO_BUTTON_3, GPIO_BUTTON_4
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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 each button */
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for (i = 0; i < NUM_BUTTONS; i++)
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{
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(void)efm32_configgpio(g_button_configs[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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* Description:
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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 BUTTON*
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* definitions above for the meaning of each bit in the returned value.
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*
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****************************************************************************/
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uint8_t board_buttons(void)
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{
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uint8_t ret;
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int i;
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/* Check each button */
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for (i = 0, ret = 0; i < NUM_BUTTONS; i++)
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{
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/* The button is closed if a low value is sensed */
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if (!efm32_gpioread(g_button_configs[i]))
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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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* Name: board_button_irq
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*
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* Description:
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* This function 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 one
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* of the BUTTON* definitions provided above. The previous interrupt
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* handler address is returned (so that it may restored, if so desired).
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*
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* Configuration Notes:
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* Configuration CONFIG_EFM32_GPIO_IRQ must be selected to enable the
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* overall GPIO IRQ feature.
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*
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* Returned Value:
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* This function should return the old interrupt handler value, but
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* currently always returns NULL.
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*
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****************************************************************************/
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#if defined(CONFIG_EFM32_GPIO_IRQ) && defined(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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xcpt_t oldhandler = NULL;
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if (id >=0 && id < NUM_BUTTONS)
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{
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irqstate_t flags;
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/* Disable interrupts until we are done. This guarantees that the
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* following operations are atomic.
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*/
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flags = irqsave();
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/* Get/set the old button handler
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*
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* REVISIT: Keeping copies of the hander in RAM seems wasteful
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* since the OS already has this information internally.
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*/
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#if 0 /* REVISIT */
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oldhandler = g_button_handlers[id];
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g_button_handlers[id] = irqhandler;
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#else
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oldhandler = NULL;
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#endif
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/* Are we attaching or detaching? */
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if (irqhandler != NULL)
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{
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/* Configure the interrupt */
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efm32_gpioirq(g_button_configs[id]);
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/* Attach and enable the interrupt */
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(void)irq_attach(g_button_irqs[id], irqhandler);
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efm32_gpioirqenable(g_button_irqs[id]);
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}
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else
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{
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/* Disable and detach the interrupt */
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efm32_gpioirqdisable(g_button_irqs[id]);
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(void)irq_detach(g_button_irqs[id]);
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}
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irqrestore(flags);
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}
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/* Return the old button handler (so that it can be restored) */
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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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@ -40,36 +40,44 @@
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* Included Files
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* Included Files
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****************************************************************************/
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****************************************************************************/
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#include <arch/irq.h>
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/****************************************************************************
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/****************************************************************************
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* Pre-processor Definitions
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* Pre-processor Definitions
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****************************************************************************/
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****************************************************************************/
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/* LEDs
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/* Buttons:
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*
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*
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* The EFM32 Gecko Start Kit has four yellow LEDs. These LEDs are connected
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* The Olimex board has four buttons, BUT1-4. Each is grounded and so should
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* as follows:
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* have a weak pull-up so that it will be sensed as "1" when open and "0"
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*
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* when closed.
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* ------------------------------------- --------------------
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*
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* EFM32 PIN BOARD SIGNALS
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* --------------------- ---------------------
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* ------------------------------------- --------------------
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* PIN CONNECTIONS
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* C0/USART1_TX#0/PCNT0_S0IN#2/ACMP0_CH0 MCU_PC0 UIF_LED0
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* --------------------- ---------------------
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* C1/USART1_RX#0/PCNT0_S1IN#2/ACMP0_CH1 MCU_PC1 UIF_LED1
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* PE0/PCNT0_S0IN/U0_TX BUT1, EXT-18
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* C2/USART2_TX#0/ACMP0_CH2 MCU_PC2 UIF_LED2
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* PE1/PCNT0_S1IN/U0_RX BUT2, EXT-19
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* C3/USART2_RX#0/ACMP0_CH3 MCU_PC3 UIF_LED3
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* PE2/ACMP0_O BUT3, EXT-20
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* ------------------------------------- --------------------
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* PE3/ACMP1_O BUT4, EXT-21
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*
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* --------------------- ---------------------
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* All LEDs are grounded and so are illuminated by outputting a high
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*/
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* value to the LED.
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*/
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#define GPIO_LED1 (GPIO_OUTPUT_WIREDOR_PULLDOWN|\
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#ifdef CONFIG_EFM32_GPIO_IRQ
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GPIO_OUTPUT_CLEAR|GPIO_PORTC|GPIO_PIN0)
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# define GPIO_BUTTON_1 (GPIO_INPUT_PULLUP|GPIO_INT_BOTH|GPIO_PORTE|GPIO_PIN0)
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#define GPIO_LED2 (GPIO_OUTPUT_WIREDOR_PULLDOWN|\
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# define GPIO_BUTTON_2 (GPIO_INPUT_PULLUP|GPIO_INT_BOTH|GPIO_PORTE|GPIO_PIN1)
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GPIO_OUTPUT_CLEAR|GPIO_PORTC|GPIO_PIN1)
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# define GPIO_BUTTON_3 (GPIO_INPUT_PULLUP|GPIO_INT_BOTH|GPIO_PORTE|GPIO_PIN2)
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#define GPIO_LED3 (GPIO_OUTPUT_WIREDOR_PULLDOWN|\
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# define GPIO_BUTTON_4 (GPIO_INPUT_PULLUP|GPIO_INT_BOTH|GPIO_PORTE|GPIO_PIN3)
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GPIO_OUTPUT_CLEAR|GPIO_PORTC|GPIO_PIN2)
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#define GPIO_LED4 (GPIO_OUTPUT_WIREDOR_PULLDOWN|\
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# define GPIO_IRQ_BUTTON_1 EFM32_IRQ_EXTI0
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GPIO_OUTPUT_CLEAR|GPIO_PORTC|GPIO_PIN3)
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# define GPIO_IRQ_BUTTON_2 EFM32_IRQ_EXTI1
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# define GPIO_IRQ_BUTTON_3 EFM32_IRQ_EXTI2
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# define GPIO_IRQ_BUTTON_4 EFM32_IRQ_EXTI3
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#else
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# define GPIO_BUTTON_1 (GPIO_INPUT_PULLUP|GPIO_PORTE|GPIO_PIN0)
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# define GPIO_BUTTON_2 (GPIO_INPUT_PULLUP|GPIO_PORTE|GPIO_PIN1)
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# define GPIO_BUTTON_3 (GPIO_INPUT_PULLUP|GPIO_PORTE|GPIO_PIN2)
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# define GPIO_BUTTON_4 (GPIO_INPUT_PULLUP|GPIO_PORTE|GPIO_PIN3)
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#endif
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/****************************************************************************
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/****************************************************************************
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* Public Function Prototypes
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* Public Function Prototypes
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