diff display colum index + separate services & config accessors

components/services/accessors.h

@@ -0,0 +1,15 @@
+/*
+   This example code is in the Public Domain (or CC0 licensed, at your option.)
+
+   Unless required by applicable law or agreed to in writing, this
+   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+   CONDITIONS OF ANY KIND, either express or implied.
+*/
+
+#pragma once
+
+#include "esp_system.h"
+#include "driver/i2c.h"
+
+esp_err_t 				config_i2c_set(const i2c_config_t * config, int port);
+const i2c_config_t * 	config_i2c_get(int * i2c_port);