samples: adds a sample for using aio_dw_comparator driver

Change-Id: Idcfe266db237a0f2aaa6376562cf92bb49e626cc
Signed-off-by: Daniel Leung <daniel.leung@intel.com>

5 files changed, 134 insertions, 0 deletions

diff --git a/samples/nanokernel/apps/aio_dw_comparator/Makefile b/samples/nanokernel/apps/aio_dw_comparator/Makefile
new file mode 100644
index 000000000..ba2c040c2
--- /dev/null
+++ b/samples/nanokernel/apps/aio_dw_comparator/Makefile
@@ -0,0 +1,5 @@
+BOARD ?= quark_se_ctb
+KERNEL_TYPE = nano
+CONF_FILE = prj.conf
+
+include ${ZEPHYR_BASE}/Makefile.inc
diff --git a/samples/nanokernel/apps/aio_dw_comparator/prj.conf b/samples/nanokernel/apps/aio_dw_comparator/prj.conf
new file mode 100644
index 000000000..c270ac3a6
--- /dev/null
+++ b/samples/nanokernel/apps/aio_dw_comparator/prj.conf
@@ -0,0 +1,4 @@
+CONFIG_STDOUT_CONSOLE=y
+CONFIG_PRINTK=y
+CONFIG_AIO_COMPARATOR=y
+CONFIG_AIO_DW_COMPARATOR=y
diff --git a/samples/nanokernel/apps/aio_dw_comparator/src/Makefile b/samples/nanokernel/apps/aio_dw_comparator/src/Makefile
new file mode 100644
index 000000000..00066e156
--- /dev/null
+++ b/samples/nanokernel/apps/aio_dw_comparator/src/Makefile
@@ -0,0 +1 @@
+obj-y = main.o
diff --git a/samples/nanokernel/apps/aio_dw_comparator/src/main.c b/samples/nanokernel/apps/aio_dw_comparator/src/main.c
new file mode 100644
index 000000000..6e6835a22
--- /dev/null
+++ b/samples/nanokernel/apps/aio_dw_comparator/src/main.c
@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2016 Intel Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @file main.c - DesignWare AIO/Comparator demo on Arduino 101
+ *
+ * This is used to demo the DesignWare AIO/Comparator. The voltage input
+ * pin is analog in A0 on circuit board, which maps to AIN[10] on chip.
+ *
+ * The comparion is using the internal 3.3V as reference voltage,
+ * so it needs a higher voltage to trigger comparator.
+ *
+ * To test:
+ * 1. Connect the A0 pin to ground via a resistor. Any larger than
+ *    1k Ohm would be fine. This is to avoid floating pin.
+ * 2. Turn on the device.
+ * 3. Wait for device to boot, until "app started" line appeared.
+ * 4. Connect a voltage source higher than 3.3V (the 5V line would work).
+ *    The line "*** A0, AIN[10] triggered rising." should appear.
+ * 5. Remove the voltage source.
+ *    The line "*** A0, AIN[10] triggered falling." should appear.
+ */
+
+#if defined(CONFIG_STDOUT_CONSOLE)
+#include <stdio.h>
+#define PRINT           printf
+#else
+#include <misc/printk.h>
+#define PRINT           printk
+#endif
+
+#include <zephyr.h>
+#include <stdint.h>
+#include <device.h>
+#include <aio_comparator.h>
+
+/* specify delay between greetings (in ms); compute equivalent in ticks */
+#define SLEEPTIME  SECONDS(5)
+
+struct cb_data_t {
+	uint8_t ain_idx;
+	enum aio_cmp_ref ref;
+	enum aio_cmp_polarity pol;
+	char name[50];
+};
+
+struct cb_data_t cb_data = {
+	.ain_idx = 10,
+	.ref = AIO_CMP_REF_A,
+	.pol = AIO_CMP_POL_RISE,
+	.name = "A0, AIN[10]",
+};
+
+void cb(void *param)
+{
+	struct device *aio_cmp_dev;
+	struct cb_data_t *p = (struct cb_data_t *)param;
+
+	aio_cmp_dev = device_get_binding(CONFIG_AIO_DW_COMPARATOR_DEV_NAME);
+
+	PRINT("*** %s triggered %s.\n", &p->name,
+	      (p->pol == AIO_CMP_POL_RISE) ? "rising" : "falling"
+	);
+
+	if (p->pol == AIO_CMP_POL_RISE)
+		p->pol = AIO_CMP_POL_FALL;
+	else
+		p->pol = AIO_CMP_POL_RISE;
+
+	aio_cmp_configure(aio_cmp_dev, p->ain_idx, p->pol, p->ref, cb, p);
+}
+
+void main(void)
+{
+	struct device *aio_cmp_dev;
+	int i, ret;
+	int cnt = 0;
+	uint32_t timer_data[2] = {0, 0};
+	struct nano_timer timer;
+
+	nano_timer_init(&timer, timer_data);
+
+	aio_cmp_dev = device_get_binding(CONFIG_AIO_DW_COMPARATOR_DEV_NAME);
+
+	PRINT("===== app started ========\n");
+
+	for (i = 0; i < 4; i++) {
+		/* REF_A is to use AREF for reference */
+		ret = aio_cmp_configure(aio_cmp_dev, cb_data.ain_idx,
+					cb_data.pol, cb_data.ref,
+					cb, &cb_data);
+		if (ret)
+			PRINT("ERROR registering callback for %s (%d)\n",
+			      &cb_data.name, ret);
+	}
+
+	while (1) {
+		PRINT("... waiting for event! (%d)\n", ++cnt);
+
+		/* wait a while */
+		nano_task_timer_start(&timer, SLEEPTIME);
+		nano_task_timer_test(&timer, TICKS_UNLIMITED);
+	}
+}
+
diff --git a/samples/nanokernel/apps/aio_dw_comparator/testcase.ini b/samples/nanokernel/apps/aio_dw_comparator/testcase.ini
new file mode 100644
index 000000000..a728f7bfc
--- /dev/null
+++ b/samples/nanokernel/apps/aio_dw_comparator/testcase.ini
@@ -0,0 +1,6 @@
+[test]
+build_only = true
+tags = drivers
+
+arch_whitelist = x86
+platform_whitelist = arduino_101