tests: add test for tsl2561 sensor driver

tests/driver_tsl2561/Makefile

@@ -0,0 +1,21 @@
+APPLICATION = driver_tsl2561
+include ../Makefile.tests_common
+
+FEATURES_REQUIRED = periph_i2c
+
+USEMODULE += tsl2561
+USEMODULE += xtimer
+
+# set default device parameters in case they are undefined
+TEST_I2C              ?= I2C_DEV\(0\)
+TEST_ADDR             ?= TSL2561_ADDR_FLOAT
+TEST_GAIN             ?= TSL2561_GAIN_1X
+TEST_INTEGRATION_TIME ?= TSL2561_INTEGRATIONTIME_402MS
+
+# export parameters
+CFLAGS += -DTEST_I2C=$(TEST_I2C)
+CFLAGS += -DTEST_ADDR=$(TEST_ADDR)
+CFLAGS += -DTEST_GAIN=$(TEST_GAIN)
+CFLAGS += -DTEST_INTEGRATION_TIME=$(TEST_INTEGRATION_TIME)
+
+include $(RIOTBASE)/Makefile.include

tests/driver_tsl2561/README.md

@@ -0,0 +1,8 @@
+## About
+This is a test application for the TSL2561 Lux sensor.
+
+## Usage
+The application initializes the TSL2561 sensor on an I2C bus.
+
+After initialization, every second, the application reads the measured illuminance
+and display the corresponding Lux value.

tests/driver_tsl2561/main.c

@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2016 Inria
+ *
+ * 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 TSL2561 Lux sensor
+ *
+ * @author      Alexandre Abadie <alexandre.abadie@inria.fr>
+ *
+ * @}
+ */
+
+#ifndef TEST_I2C
+#error "TEST_I2C not defined"
+#endif
+
+#ifndef TEST_ADDR
+#error "TEST_ADDR not defined"
+#endif
+
+#ifndef TEST_GAIN
+#error "TEST_GAIN not defined"
+#endif
+
+#ifndef TEST_INTEGRATION_TIME
+#error "TEST_INTEGRATION_TIME not defined"
+#endif
+
+#include <stdio.h>
+#include <inttypes.h>
+
+#include "tsl2561.h"
+#include "xtimer.h"
+#include "board.h"
+
+#define SLEEP_1S   (1 * 1000 * 1000u) /* 1 second delay between printf */
+
+int main(void)
+{
+    puts("TSL2561 test application\n");
+
+    tsl2561_t dev;
+
+    printf("+------------Initializing------------+\n");
+
+    switch(tsl2561_init(&dev, TEST_I2C, TEST_ADDR,
+                        TEST_GAIN, TEST_INTEGRATION_TIME)) {
+        case TSL2561_NOI2C:
+        puts("[Error] I2C not working: cannot initialize the sensor.\n");
+        break;
+
+        case TSL2561_BADDEV:
+        puts("[Error] Not a TSL2561: cannot initialize the sensor.\n");
+        break;
+
+        case TSL2561_OK:
+        puts("[Info] Initialization successful\n\n");
+        break;
+    }
+
+    printf("\n+--------Starting Measurements--------+\n");
+    while (1) {
+        /* Get the illuminance in Lux */
+        printf("Illuminance [lx]: %i\n"
+               "\n+-------------------------------------+\n",
+               (int)tsl2561_read_illuminance(&dev));
+
+        xtimer_usleep(SLEEP_1S);
+    }
+
+    return 0;
+}