drivers/saul: add auto_init for BME680

drivers/saul/init_devs/auto_init_bme680.c

@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2020 Gunar Schorcht
+ *
+ * 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     sys_auto_init_saul
+ * @brief       Auto initialization of Bosch BME680 device driver
+ * @author      Gunar Schorcht <gunar@schorcht.net>
+ * @file
+ */
+
+#ifdef MODULE_BME680
+
+#include "assert.h"
+#include "log.h"
+#include "saul_reg.h"
+#include "bme680.h"
+#include "bme680_params.h"
+
+/**
+ * @brief   Allocation of memory for device descriptors
+ */
+bme680_t bme680_devs_saul[BME680_NUMOF];
+
+/**
+ * @brief   Memory for the SAUL registry entries
+ */
+static saul_reg_t saul_entries[BME680_NUMOF * 4];
+
+/**
+ * @brief   Define the number of saul info
+ */
+#define BME680_INFO_NUMOF   ARRAY_SIZE(bme680_saul_info)
+
+/**
+ * @name    Reference the driver structs.
+ * @{
+ */
+extern const saul_driver_t bme680_saul_driver_temperature;
+extern const saul_driver_t bme680_saul_driver_pressure;
+extern const saul_driver_t bme680_saul_driver_humidity;
+extern const saul_driver_t bme680_saul_driver_gas;
+/** @} */
+
+void auto_init_bme680(void)
+{
+    assert(BME680_INFO_NUMOF == BME680_NUMOF);
+
+    for (unsigned i = 0; i < BME680_NUMOF; i++) {
+        LOG_DEBUG("[auto_init_saul] initializing BME680 #%u\n", i);
+
+        if (bme680_init(&bme680_devs_saul[i],
+                        &bme680_params[i]) != BME680_OK) {
+            LOG_ERROR("[auto_init_saul] error initializing BME680 #%u\n", i);
+            continue;
+        }
+
+        /* temperature */
+        saul_entries[(i * 4)].dev = &(bme680_devs_saul[i]);
+        saul_entries[(i * 4)].name = bme680_saul_info[i].name;
+        saul_entries[(i * 4)].driver = &bme680_saul_driver_temperature;
+
+        /* pressure */
+        saul_entries[(i * 4) + 1].dev = &(bme680_devs_saul[i]);
+        saul_entries[(i * 4) + 1].name = bme680_saul_info[i].name;
+        saul_entries[(i * 4) + 1].driver = &bme680_saul_driver_pressure;
+
+        /* relative humidity */
+        saul_entries[(i * 4) + 2].dev = &(bme680_devs_saul[i]);
+        saul_entries[(i * 4) + 2].name = bme680_saul_info[i].name;
+        saul_entries[(i * 4) + 2].driver = &bme680_saul_driver_humidity;
+
+        /* relative humidity */
+        saul_entries[(i * 4) + 3].dev = &(bme680_devs_saul[i]);
+        saul_entries[(i * 4) + 3].name = bme680_saul_info[i].name;
+        saul_entries[(i * 4) + 3].driver = &bme680_saul_driver_gas;
+
+        /* register to saul */
+        saul_reg_add(&(saul_entries[(i * 4)]));
+        saul_reg_add(&(saul_entries[(i * 4) + 1]));
+        saul_reg_add(&(saul_entries[(i * 4) + 2]));
+        saul_reg_add(&(saul_entries[(i * 4) + 3]));
+    }
+}
+#else
+typedef int dont_be_pedantic;
+#endif /* MODULE_BME680 */

drivers/saul/init_devs/init.c

@@ -59,6 +59,10 @@ void saul_init_devs(void)
         extern void auto_init_apds99xx(void);
         auto_init_apds99xx();
     }
+    if (IS_USED(MODULE_BME680)) {
+        extern void auto_init_bme680(void);
+        auto_init_bme680();
+    }
     if (IS_USED(MODULE_BMP180)) {
         extern void auto_init_bmp180(void);
         auto_init_bmp180();