samples: Add a tiny test application for ADC API

Currently useful only for Galileo.

Change-Id: I8d4fafd530e11a50f91cedd0de1691393f270b9c
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>

samples/nanokernel/apps/adc/Makefile

@@ -0,0 +1,5 @@
+PLATFORM_CONFIG = galileo
+KERNEL_TYPE = nano
+CONF_FILE = prj_$(ARCH).conf
+
+include ${ZEPHYR_BASE}/Makefile.inc

samples/nanokernel/apps/adc/prj_x86.conf

@@ -0,0 +1,4 @@
+CONFIG_PCI_DEBUG=y
+
+CONFIG_ADC=y
+CONFIG_ADC_DEBUG=y

samples/nanokernel/apps/adc/src/Makefile

@@ -0,0 +1,3 @@
+ccflags-y += -I${ZEPHYR_BASE}/include/drivers
+
+obj-y = adc.o

samples/nanokernel/apps/adc/src/adc.c

@@ -0,0 +1,119 @@
+/* adc.c - ADC test source file */
+
+/*
+ * Copyright (c) 2015 Intel Corporation.
+ *
+ * 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 of Intel Corporation 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 HOLDER 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.
+ */
+
+#include <nanokernel.h>
+#include <arch/cpu.h>
+
+#include <device.h>
+#include <misc/byteorder.h>
+#include <adc.h>
+
+#if defined(CONFIG_STDOUT_CONSOLE)
+#include <stdio.h>
+#define DBG	printf
+#else
+#include <misc/printk.h>
+#define DBG	printk
+#endif
+
+#define SLEEPTIME  10
+#define SLEEPTICKS (SLEEPTIME * sys_clock_ticks_per_sec)
+
+static int cb_count;
+
+static uint8_t seq_buffer[100];
+static struct adc_seq_entry sample = {
+	.sampling_delay = 1,
+	.channel_id = 0,
+	.buffer = seq_buffer,
+	.buffer_length = 100,
+};
+
+static struct adc_seq_table table = {
+	.entries = &sample,
+	.num_entries = 1,
+};
+
+static void _print_sample_in_hex(uint8_t *buf, uint32_t length)
+{
+	DBG("Buffer content:\n");
+	for (; length > 0; length -= 2, buf += 2) {
+		DBG("0x%x ", *((uint16_t *)buf));
+	}
+}
+
+static void callback(struct device *dev, enum adc_callback_type cb_type)
+{
+	DBG("ADC callback %d - type %d\n", cb_count++, cb_type);
+
+	if (cb_type == ADC_CB_DONE) {
+		DBG("Sampling is done\n");
+		_print_sample_in_hex(seq_buffer, 100);
+	} else {
+		DBG("Sampling could not proceed, an error occurred\n");
+	}
+}
+
+void main(void)
+{
+	struct device *adc;
+	struct nano_timer timer;
+	uint32_t data[2] = {0, 0};
+
+	cb_count = 0;
+
+	nano_timer_init(&timer, data);
+
+	adc = device_get_binding(CONFIG_ADC_TI_ADC108S102_0_DRV_NAME);
+	if (!adc) {
+		DBG("Cannot get adc controller\n");
+		goto done;
+	}
+
+	adc_set_callback(adc, callback);
+
+	adc_enable(adc);
+
+	adc_disable(adc);
+
+	if (adc_read(adc, &table) != DEV_OK) {
+		DBG("Could not call adc_read\n");
+	}
+
+done:
+	while (1) {
+		DBG("Waiting...");
+
+		nano_task_timer_start(&timer, SLEEPTICKS);
+		nano_task_timer_wait(&timer);
+	}
+}

samples/nanokernel/apps/adc/testcase.ini

@@ -0,0 +1,6 @@
+[test]
+build_only = true
+tags = apps
+
+arch_whitelist = x86
+platform_whitelist = galileo