Add button sensor support (BOOT button)

platform/ev-aducrf101mkxz/Makefile.ev-aducrf101mkxz

@@ -41,7 +41,7 @@ CONTIKI_TARGET_MAIN = ${CONTIKI_CORE}.o
 CONTIKI_TARGET_SOURCEFILES += $(ARCH)
 CONTIKI_TARGET_SOURCEFILES += contiki-main.c
 CONTIKI_TARGET_SOURCEFILES += slip.c
-CONTIKI_TARGET_SOURCEFILES += sensors.c
+CONTIKI_TARGET_SOURCEFILES += button-sensor.c
 
 CONTIKI_SOURCEFILES += $(CONTIKI_TARGET_SOURCEFILES)
 

platform/ev-aducrf101mkxz/button-sensor.c

@@ -0,0 +1,104 @@
+/**
+ * Copyright (c) 2014, Analog Devices, Inc.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted (subject to the limitations in the
+ * disclaimer below) provided that the following conditions are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * - 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.
+ *
+ * - Neither the name of Analog Devices, Inc. nor the names of its
+ *   contributors may be used to endorse or promote products derived
+ *   from this software without specific prior written permission.
+ *
+ * NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE
+ * GRANTED BY THIS LICENSE.  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.
+ */
+/**
+ * \author Jim Paris <jim.paris@rigado.com>
+ */
+
+#include "lib/sensors.h"
+#include "dev/button-sensor.h"
+#include "platform-conf.h"
+
+#include <signal.h>
+
+const struct sensors_sensor button_sensor;
+static struct timer debouncetimer;
+
+/* e.g. pADI_GP0 */
+#define GPIO CC_CONCAT(pADI_GP, BUTTON_GPIO)
+
+/* e.g. Ext_Int2_Handler */
+#define HANDLER CC_CONCAT(CC_CONCAT(Ext_Int, BUTTON_INT), _Handler)
+
+/* e.g. EINT2_IRQn */
+#define IRQN CC_CONCAT(CC_CONCAT(EINT, BUTTON_INT), _IRQn)
+
+void
+HANDLER(void)
+{
+  pADI_INTERRUPT->EICLR = (1 << BUTTON_INT);
+  if(!timer_expired(&debouncetimer)) {
+    return;
+  }
+  timer_set(&debouncetimer, CLOCK_SECOND / 8);
+  sensors_changed(&button_sensor);
+}
+static int
+config(int type, int c)
+{
+  switch(type) {
+  case SENSORS_HW_INIT:
+    timer_set(&debouncetimer, 0);
+    return 1;
+  case SENSORS_ACTIVE:
+    /* Set button as a GPIO input with pullup */
+    GPIO->GPCON &= ~(3UL << (BUTTON_PIN * 2));
+    GPIO->GPOEN &= ~(1UL << BUTTON_PIN);
+    GPIO->GPPUL |= (1UL << BUTTON_PIN);
+
+    /* Enable interrupt for the button (rise and fall) */
+#if BUTTON_INT <= 3
+    pADI_INTERRUPT->EI0CFG |= (0xaUL << (4 * (BUTTON_INT - 0)));
+#elif BUTTON_INT <= 7
+    pADI_INTERRUPT->EI1CFG |= (0xaUL << (4 * (BUTTON_INT - 4)));
+#endif
+    pADI_INTERRUPT->EICLR = (1 << BUTTON_INT);
+    NVIC_EnableIRQ(IRQN);
+    return 1;
+  }
+  return 0;
+}
+static int
+status(int type)
+{
+  switch(type) {
+  case SENSORS_ACTIVE:
+  case SENSORS_READY:
+    if(GPIO->GPIN & (1UL << BUTTON_PIN)) {
+      return 1;
+    }
+    return 0;
+  }
+  return 0;
+}
+SENSORS_SENSOR(button_sensor, BUTTON_SENSOR, NULL, config, status);

platform/ev-aducrf101mkxz/contiki-main.c

@@ -162,6 +162,7 @@ main(int argc, char **argv)
 #endif
 
   serial_line_init();
+  process_start(&sensors_process, NULL);
 
   autostart_start(autostart_processes);
 

platform/ev-aducrf101mkxz/platform-conf.h

@@ -36,4 +36,7 @@
  */
 
 #define LED1    pADI_GP4, BIT2
-#define BUTTON1 pADI_GP0, BIT6
+
+#define BUTTON_GPIO 0
+#define BUTTON_PIN  6
+#define BUTTON_INT  2