Add support for onboard joystick

configs/stm32butterfly2/nshnet/defconfig

@@ -562,7 +562,7 @@ CONFIG_ARCH_BOARD="stm32butterfly2"
 CONFIG_ARCH_HAVE_LEDS=y
 CONFIG_ARCH_LEDS=y
 CONFIG_ARCH_HAVE_BUTTONS=y
-# CONFIG_ARCH_BUTTONS is not set
+CONFIG_ARCH_BUTTONS=y
 
 #
 # Board-Specific Options
@@ -1151,6 +1151,9 @@ CONFIG_EXAMPLES_ADC=y
 CONFIG_EXAMPLES_ADC_DEVPATH="/dev/adc0"
 CONFIG_EXAMPLES_ADC_GROUPSIZE=4
 CONFIG_EXAMPLES_ADC_SWTRIG=y
+CONFIG_EXAMPLES_BUTTONS=y
+CONFIG_EXAMPLES_BUTTONS_MIN=0
+CONFIG_EXAMPLES_BUTTONS_MAX=4
 # CONFIG_EXAMPLES_CHAT is not set
 # CONFIG_EXAMPLES_CONFIGDATA is not set
 # CONFIG_EXAMPLES_DHCPD is not set

configs/stm32butterfly2/src/Makefile

@@ -30,7 +30,6 @@
 # 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.
-#
 ############################################################################
 
 -include $(TOPDIR)/Make.defs
@@ -50,4 +49,8 @@ ifeq ($(CONFIG_MMCSD),y)
 CSRCS += stm32_mmcsd.c
 endif
 
+ifeq ($(CONFIG_ARCH_BUTTONS),y)
+CSRCS += stm32_buttons.c
+endif
+
 include $(TOPDIR)/configs/Board.mk

configs/stm32butterfly2/src/stm32_buttons.c

+/*****************************************************************************
+ * configs/stm32butterfly2/src/stm32_buttons.c
+ *
+ *   Copyright (C) 2016 Michał Łyszczek. All rights reserved.
+ *   Author: Michał Łyszczek <michal.lyszczek@gmail.com>
+ *
+ * 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.
+ ****************************************************************************/
+
+/*****************************************************************************
+ * Public Includes
+ ****************************************************************************/
+
+#include "stm32_gpio.h"
+
+/*****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define NUM_BUTTONS 5
+
+#define GPIO_JOY_O (GPIO_INPUT | GPIO_CNF_INFLOAT | GPIO_MODE_INPUT |\
+                    GPIO_PORTC | GPIO_PIN7)
+#define GPIO_JOY_U (GPIO_INPUT | GPIO_CNF_INFLOAT | GPIO_MODE_INPUT |\
+                    GPIO_PORTC | GPIO_PIN8)
+#define GPIO_JOY_D (GPIO_INPUT | GPIO_CNF_INFLOAT | GPIO_MODE_INPUT |\
+                    GPIO_PORTC | GPIO_PIN9)
+#define GPIO_JOY_R (GPIO_INPUT | GPIO_CNF_INFLOAT | GPIO_MODE_INPUT |\
+                    GPIO_PORTC | GPIO_PIN10)
+#define GPIO_JOY_L (GPIO_INPUT | GPIO_CNF_INFLOAT | GPIO_MODE_INPUT |\
+                    GPIO_PORTC | GPIO_PIN11)
+
+/*****************************************************************************
+ * Private Declarations
+ ****************************************************************************/
+
+static const uint32_t buttons[NUM_BUTTONS] = {
+  GPIO_JOY_O, GPIO_JOY_U, GPIO_JOY_D, GPIO_JOY_R, GPIO_JOY_L };
+
+/*****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/*****************************************************************************
+ * Name: board_button_initialize
+ *
+ * Description:
+ *      Initializes gpio pins for joystick buttons
+ ****************************************************************************/
+
+void board_button_initialize(void)
+{
+  int i;
+  for (i = 0; i != NUM_BUTTONS; ++i)
+    {
+      stm32_configgpio(buttons[i]);
+    }
+}
+
+/*****************************************************************************
+ * Name: board_buttons
+ *
+ * Description:
+ *      Reads keys
+ ****************************************************************************/
+
+uint8_t board_buttons(void)
+{
+  uint8_t rv = 0;
+  int i;
+
+  for (i = 0; i != NUM_BUTTONS; ++i)
+    {
+      if (stm32_gpioread(buttons[i]) == 0)
+        {
+          rv |= 1 << i;
+        }
+    }
+
+  return rv;
+}
+