target_esp32: allow to specify I2C port

Author: dshil

components/ocs_io/i2c/target_esp32/master_bus.cpp

@@ -29,7 +29,7 @@ MasterBus::MasterBus(MasterBus::Params params) {
     memset(&config, 0, sizeof(config));
 
     config.clk_source = I2C_CLK_SRC_DEFAULT;
-    config.i2c_port = I2C_NUM_0;
+    config.i2c_port = params.port;
     config.sda_io_num = params.sda;
     config.scl_io_num = params.scl;
     config.glitch_ignore_cnt = 7;

components/ocs_io/i2c/target_esp32/master_bus.h

@@ -24,6 +24,9 @@ class MasterBus : public IBus, private core::NonCopyable<> {
 
         //! Clock line.
         gpio_num_t scl { GPIO_NUM_NC };
+
+        //! I2C port.
+        i2c_port_t port { I2C_NUM_0 };
     };
 
     //! Initialize.