stm32wlx: I2C implementation for gnse,lora-e5,nucleo-wl55jc boards

src/machine/board_nucleowl55jc.go

@@ -36,6 +36,20 @@ const (
 	// DEFAULT USART
 	UART_RX_PIN = UART2_RX_PIN
 	UART_TX_PIN = UART2_TX_PIN
+
+	// I2C1 pins
+	I2C1_SCL_PIN  = PA9
+	I2C1_SDA_PIN  = PA10
+	I2C1_ALT_FUNC = 4
+
+	// I2C2 pins
+	I2C2_SCL_PIN  = PA12
+	I2C2_SDA_PIN  = PA11
+	I2C2_ALT_FUNC = 4
+
+	// I2C0 alias for I2C1
+	I2C0_SDA_PIN = I2C1_SDA_PIN
+	I2C0_SCL_PIN = I2C1_SCL_PIN
 )
 
 var (
@@ -59,6 +73,17 @@ var (
 
 	DefaultUART = UART0
 
+	// I2C Busses
+	I2C1 = &I2C{
+		Bus:             stm32.I2C1,
+		AltFuncSelector: I2C1_ALT_FUNC,
+	}
+	I2C2 = &I2C{
+		Bus:             stm32.I2C2,
+		AltFuncSelector: I2C2_ALT_FUNC,
+	}
+	I2C0 = I2C1
+
 	// SPI
 	SPI3 = SPI{
 		Bus: stm32.SPI3,