boards/nucleo-l073: add configuration for I2C periph

boards/nucleo-l073/Makefile.features

@@ -2,6 +2,7 @@
 FEATURES_PROVIDED += periph_cpuid
 FEATURES_PROVIDED += periph_gpio
 FEATURES_PROVIDED += periph_hwrng
+FEATURES_PROVIDED += periph_i2c
 FEATURES_PROVIDED += periph_pwm
 FEATURES_PROVIDED += periph_rtc
 FEATURES_PROVIDED += periph_spi

boards/nucleo-l073/include/periph_conf.h

@@ -189,6 +189,51 @@ static const spi_conf_t spi_config[] = {
 #define DAC_NUMOF           (0)
 /** @} */
 
+/**
+ * @name I2C configuration
+ * @{
+ */
+#define I2C_0_EN            1
+#define I2C_1_EN            1
+#define I2C_NUMOF           (I2C_0_EN + I2C_1_EN)
+#define I2C_IRQ_PRIO        1
+#define I2C_APBCLK          (CLOCK_APB1)
+
+/* I2C 0 device configuration */
+#define I2C_0_DEV           I2C1
+#define I2C_0_CLKEN()       (periph_clk_en(APB1, RCC_APB1ENR_I2C1EN))
+#define I2C_0_CLKDIS()      (periph_clk_dis(APB1, RCC_APB1ENR_I2C1EN))
+#define I2C_0_EVT_IRQ       I2C1_IRQn
+#define I2C_0_EVT_ISR       isr_i2c1
+/* I2C 0 pin configuration */
+#define I2C_0_SCL_PORT      PORT_B
+#define I2C_0_SCL_PIN       8
+#define I2C_0_SCL_AF        4
+#define I2C_0_SCL_CLKEN()   (periph_clk_en(AHB, RCC_IOPENR_GPIOBEN))
+#define I2C_0_SDA_PORT      PORT_B
+#define I2C_0_SDA_PIN       9
+#define I2C_0_SDA_AF        4
+#define I2C_0_SDA_CLKEN()   (periph_clk_en(AHB, RCC_IOPENR_GPIOBEN))
+
+/* I2C 1 device configuration */
+#define I2C_1_DEV           I2C3
+#define I2C_1_CLKEN()       (periph_clk_en(APB1, RCC_APB1ENR_I2C3EN))
+#define I2C_1_CLKDIS()      (periph_clk_dis(APB1, RCC_APB1ENR_I2C3EN))
+#define I2C_1_EVT_IRQ       I2C3_IRQn
+#define I2C_1_EVT_ISR       isr_i2c3
+/* I2C 1 pin configuration */
+#define I2C_1_SCL_PORT      PORT_A
+#define I2C_1_SCL_PIN       8
+#define I2C_1_SCL_AF        3
+#define I2C_1_SCL_CLKEN()   (periph_clk_en(AHB, RCC_IOPENR_GPIOAEN))
+#define I2C_1_SDA_PORT      PORT_B
+#define I2C_1_SDA_PIN       5
+#define I2C_1_SDA_AF        8
+#define I2C_1_SDA_CLKEN()   (periph_clk_en(AHB, RCC_IOPENR_GPIOBEN))
+/** @} */
+
+/** @} */
+
 /**
  * @name    RTC configuration
  * @{