Apply modifications to mass-produced boards

- 3 channel power sensor ina3221
- io expander pca9557
- Some gpio moves
- ...

Signed-off-by: YoungSoo Shin <shinys000114@gmail.com>

main/service/datalog.h

@@ -3,8 +3,16 @@
 
 #include <stdint.h>
 
+#define NUM_CHANNELS 3
+
+typedef struct {
+    float voltage;
+    float current;
+    float power;
+} channel_data_t;
+
 void datalog_init(void);
-void datalog_add(uint32_t timestamp, float voltage, float current, float power);
+void datalog_add(uint32_t timestamp, const channel_data_t* channel_data);
 const char* datalog_get_path(void);
 
 #endif /* MAIN_SERVICE_DATALOG_H_ */