configs/sim: Add simulator-based test support for apps/examples/gpio

configs/sim/src/Makefile

@@ -64,4 +64,8 @@ ifeq ($(CONFIG_SIM_TOUCHSCREEN),y)
 endif
 endif
 
+ifeq ($(CONFIG_EXAMPLES_GPIO),y)
+  CSRCS += sim_gpio.c
+endif
+
 include $(TOPDIR)/configs/Board.mk

configs/sim/src/sim.h

@@ -1,7 +1,7 @@
 /****************************************************************************
  * config/sim/src/sim.h
  *
- *   Copyright (C) 2015 Gregory Nutt. All rights reserved.
+ *   Copyright (C) 2015-2016 Gregory Nutt. All rights reserved.
  *   Author: Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
@@ -111,4 +111,16 @@ int sim_bringup(void);
 int sim_zoneinfo(int minor);
 #endif
 
+/****************************************************************************
+ * Name: sim_gpio_initialize
+ *
+ * Description:
+ *   Initialize GPIO drivers for use with /apps/examples/gpio
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_EXAMPLES_GPIO
+int sim_gpio_initialize(void);
+#endif
+
 #endif /* __CONFIGS_SIM_SRC_SIM_H */

configs/sim/src/sim_bringup.c

@@ -77,6 +77,12 @@ int sim_bringup(void)
   (void)sim_zoneinfo(3);
 #endif
 
+#ifdef CONFIG_EXAMPLES_GPIO
+  /* Initialize simulated GPIO drivers */
+
+  (void)sim_gpio_initialize();
+#endif
+
 #ifdef CONFIG_AJOYSTICK
   /* Initialize the simulated analog joystick input device */
 

configs/sim/src/sim_gpio.c

@@ -0,0 +1,234 @@
+/****************************************************************************
+ * configs/sim/src/sim_gpio.c
+ *
+ *   Copyright (C) 2016 Gregory Nutt. All rights reserved.
+ *   Author:  Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdbool.h>
+#include <assert.h>
+#include <debug.h>
+
+#include <nuttx/clock.h>
+#include <nuttx/wdog.h>
+#include <nuttx/ioexpander/gpio.h>
+
+#include "sim.h"
+
+#ifdef CONFIG_EXAMPLES_GPIO
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+struct simgpio_dev_s
+{
+  struct gpio_dev_s gpio;
+  bool value;
+};
+
+struct simgpint_dev_s
+{
+  struct simgpio_dev_s simgpio;
+  WDOG_ID wdog;
+  pin_interrupt_t callback;
+};
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+static int gpin_read(FAR struct gpio_dev_s *dev, FAR bool *value);
+static int gpout_write(FAR struct gpio_dev_s *dev, bool value);
+static int gpint_attach(FAR struct gpio_dev_s *dev,
+                        pin_interrupt_t callback);
+static int gpint_enable(FAR struct gpio_dev_s *dev, bool enable);
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static const struct gpio_operations_s gpin_ops =
+{
+  .go_read   = gpin_read,
+  .go_write  = NULL,
+  .go_attach = NULL,
+  .go_enable = NULL,
+};
+
+static const struct gpio_operations_s gpout_ops =
+{
+  .go_read   = gpin_read,
+  .go_write  = gpout_write,
+  .go_attach = NULL,
+  .go_enable = NULL,
+};
+
+static const struct gpio_operations_s gpint_ops =
+{
+  .go_read   = gpin_read,
+  .go_write  = NULL,
+  .go_attach = gpint_attach,
+  .go_enable = gpint_enable,
+};
+
+static struct simgpio_dev_s g_gpin =
+{
+  .gpio = 
+  {
+    .gp_pintype = GPIO_INPUT_PIN,
+    .gp_ops     = &gpin_ops,
+  },
+};
+
+static struct simgpio_dev_s g_gpout =
+{
+  .gpio = 
+  {
+    .gp_pintype = GPIO_OUTPUT_PIN,
+    .gp_ops     = &gpout_ops,
+  },
+};
+
+static struct simgpint_dev_s g_gpint =
+{
+  .simgpio =
+  {
+    .gpio = 
+    {
+      .gp_pintype = GPIO_INTERRUPT_PIN,
+      .gp_ops     = &gpint_ops,
+    },
+  },
+};
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+static int sim_interrupt(int argc, wdparm_t arg1, ...)
+{
+  FAR struct simgpint_dev_s *simgpint = (FAR struct simgpint_dev_s *)arg1;
+
+  DEBUGASSERT(simgpint != NULL && simgpint->callback != NULL);
+  gpioinfo("Interrupt! callback=%p\n", simgpint->callback);
+
+  simgpint->callback(&simgpint->simgpio.gpio);
+  return OK;
+}
+
+static int gpin_read(FAR struct gpio_dev_s *dev, FAR bool *value)
+{
+  FAR struct simgpio_dev_s *simgpio = (FAR struct simgpio_dev_s *)dev;
+
+  DEBUGASSERT(simgpio != NULL && value != NULL);
+  gpioinfo("Reading %d (next=%d)\n", (int)simgpio->value, (int)!simgpio->value);
+
+  *value = simgpio->value;
+  simgpio->value = !simgpio->value;
+  return OK;
+}
+
+static int gpout_write(FAR struct gpio_dev_s *dev, bool value)
+{
+  FAR struct simgpio_dev_s *simgpio = (FAR struct simgpio_dev_s *)dev;
+
+  DEBUGASSERT(simgpio != NULL);
+  gpioinfo("Writing %d\n", (int)value);
+
+  simgpio->value = value;
+  return OK;    
+}
+
+static int gpint_attach(FAR struct gpio_dev_s *dev,
+                        pin_interrupt_t callback)
+{
+  FAR struct simgpint_dev_s *simgpint = (FAR struct simgpint_dev_s *)dev;
+ 
+  gpioinfo("Cancel 1 second timer\n");
+  wd_cancel(simgpint->wdog);
+
+  gpioinfo("Attach %p\n", callback);
+  simgpint->callback = callback;
+  return OK;
+}
+
+static int gpint_enable(FAR struct gpio_dev_s *dev, bool enable)
+{
+  FAR struct simgpint_dev_s *simgpint = (FAR struct simgpint_dev_s *)dev;
+
+  if (enable)
+    {
+      if (simgpint->callback != NULL)
+        {
+          gpioinfo("Start 1 second timer\n");
+          (void)wd_start(simgpint->wdog, SEC2TICK(1),
+                         (wdentry_t)sim_interrupt, 1, (wdparm_t)dev);
+        }
+    }
+  else
+    {
+       gpioinfo("Cancel 1 second timer\n");
+      (void)wd_cancel(simgpint->wdog);
+    }
+
+  return OK;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: sim_gpio_initialize
+ *
+ * Description:
+ *   Initialize GPIO drivers for use with /apps/examples/gpio
+ *
+ ****************************************************************************/
+
+int sim_gpio_initialize(void)
+{
+  g_gpint.wdog = wd_create();
+  DEBUGASSERT(g_gpint.wdog != NULL);
+
+  (void)gpio_pin_register(&g_gpin.gpio, 0);
+  (void)gpio_pin_register(&g_gpout.gpio, 1);
+  (void)gpio_pin_register(&g_gpint.simgpio.gpio, 2);
+  return 0;
+}
+#endif /* CONFIG_EXAMPLES_GPIO */