Merge pull request #9716 from aabadie/b-l475e-iot01-sensors

boards/b-l475e-iot01a: configure second I2C and on-board sensors (lis3mdl, lsm6dsl and hts221)

boards/b-l475e-iot01a/Makefile.dep

 ifneq (,$(filter saul_default,$(USEMODULE)))
   USEMODULE += saul_gpio
+  USEMODULE += hts221
+  USEMODULE += lis3mdl
+  USEMODULE += lsm6dsl
 endif

boards/b-l475e-iot01a/include/board.h

@@ -51,6 +51,28 @@ extern "C" {
  */
 #define BTN_B1_PIN          GPIO_PIN(PORT_C, 13)
 
+/**
+ * @name    HTS221 temperature/humidity sensor configuration
+ * @{
+ */
+#define HTS221_PARAM_I2C    I2C_DEV(1)
+/** @} */
+
+/**
+ * @name    LIS3MDL 3-axis magnetometer configuration
+ * @{
+ */
+#define LIS3MDL_PARAM_I2C   I2C_DEV(1)
+/** @} */
+
+/**
+ * @name    LSM6DSL accelerometer sensor configuration
+ * @{
+ */
+#define LSM6DSL_PARAM_I2C   I2C_DEV(1)
+#define LSM6DSL_PARAM_ADDR  (0x6A)
+/** @} */
+
 /**
  * @brief   Initialize board specific hardware, including clock, LEDs and std-IO
  */

boards/b-l475e-iot01a/include/periph_conf.h

@@ -204,10 +204,22 @@ static const i2c_conf_t i2c_config[] = {
         .bus            = APB1,
         .rcc_mask       = RCC_APB1ENR1_I2C1EN,
         .irqn           = I2C1_ER_IRQn,
-    }
+    },
+    {
+        .dev            = I2C2,
+        .speed          = I2C_SPEED_NORMAL,
+        .scl_pin        = GPIO_PIN(PORT_B, 10),
+        .sda_pin        = GPIO_PIN(PORT_B, 11),
+        .scl_af         = GPIO_AF4,
+        .sda_af         = GPIO_AF4,
+        .bus            = APB1,
+        .rcc_mask       = RCC_APB1ENR1_I2C2EN,
+        .irqn           = I2C2_ER_IRQn,
+    },
 };
 
 #define I2C_0_ISR           isr_i2c1_er
+#define I2C_1_ISR           isr_i2c2_er
 
 #define I2C_NUMOF           (sizeof(i2c_config) / sizeof(i2c_config[0]))
 /** @} */