tests: added test for ISL29020 light sensor driver

tests/driver_isl29020/Makefile

@@ -0,0 +1,28 @@
+APPLICATION = driver_isl29020
+include ../Makefile.tests_common
+
+FEATURES_REQUIRED = periph_i2c
+
+# Define default pin mappings for some boards:
+ifneq (,$(filter iot-lab_M3,$(BOARD)))
+  export TEST_ISL29020_ADDR = 68
+  export TEST_ISL29020_I2C ?= I2C_0
+endif
+
+USEMODULE += isl29020
+USEMODULE += vtimer
+
+ifneq (,$(TEST_ISL29020_I2C))
+  CFLAGS += -DTEST_ISL29020_I2C=$(TEST_ISL29020_I2C)
+else
+  # set random default
+  CFLAGS += -DTEST_ISL29020_I2C=I2C_0
+endif
+ifneq (,$(TEST_ISL29020_ADDR))
+  CFLAGS += -DTEST_ISL29020_ADDR=$(TEST_ISL29020_ADDR)
+else
+  # set random default
+  CFLAGS += -DTEST_ISL29020_ADDR=68
+endif
+
+include $(RIOTBASE)/Makefile.include

tests/driver_isl29020/README.md

@@ -0,0 +1,12 @@
+# About
+This is a manual test application for the ISL29020 light sensor driver.
+
+# Usage
+This test application will initialize the list sensor with the following parameters:
+ - Mode: Ambient light measurement
+ - Range: 16000LUX
+
+After initialization, the sensor value is read every 250ms and printed to the STDOUT.
+
+To verify the seen value you can hold the sensor into a bright light or shield the sensor to
+see the value changing.

tests/driver_isl29020/main.c

@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2014 Freie Universität Berlin
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup tests
+ * @{
+ *
+ * @file
+ * @brief       Test application for the ISL29020 light sensor
+ *
+ * @author      Hauke Petersen <hauke.petersen@fu-berlin.de>
+ *
+ * @}
+ */
+
+#ifndef TEST_ISL29020_I2C
+#error "TEST_ISL29020_I2C not defined"
+#endif
+#ifndef TEST_ISL29020_ADDR
+#error "TEST_ISL29020_ADDR not defined"
+#endif
+
+#include <stdio.h>
+
+#include "vtimer.h"
+#include "isl29020.h"
+
+#define MODE        ISL29020_MODE_AMBIENT
+#define RANGE       ISL29020_RANGE_16K
+#define SLEEP       (250 * 1000U)
+
+int main(void)
+{
+    isl29020_t dev;
+    int value;
+
+    puts("ISL29020 light sensor test application\n");
+    printf("Initializing ISL29020 sensor at I2C_%i... ", TEST_ISL29020_I2C);
+    if (isl29020_init(&dev, TEST_ISL29020_I2C, TEST_ISL29020_ADDR, RANGE, MODE) == 0) {
+        puts("[OK]\n");
+    }
+    else {
+        puts("[Failed]");
+        return 1;
+    }
+
+    while (1) {
+        value = isl29020_read(&dev);
+        printf("Light value: %5i LUX\n", value);
+        vtimer_usleep(SLEEP);
+    }
+
+    return 0;
+}