Modularize main.c into rgb, event, database, ui, system, and app_manager modules

App/system.h

@@ -0,0 +1,31 @@
+#ifndef __SYSTEM_H__
+#define __SYSTEM_H__
+
+#include "config.h"
+
+// GPIO 与系统外设初始化
+void GPIO_Init(void);
+void Uart1_Init(void);
+
+// 延时与时间工具函数
+void Delay_ms(u16 ms);
+void Delay10us(void);
+void Delay_us(u16 us);
+u16 GetTimer0_Safe(void);
+
+// 串口数据打印函数
+void Uart_SendByte(u8 dat);
+void Uart_SendString(char *s);
+char Uart_RxChar(void);
+void Uart_SendHex4(u8 val);
+void Uart_SendHex8(u8 val);
+void Uart_SendHex16(u16 val);
+void Uart_SendHex20(u32 val);
+void Uart_SendHex32(u32 val);
+void FormatHex(u32 val, char *buf);
+
+// 电源管理与休眠唤醒
+void Enter_Low_Power_Sleep(void);
+void Wakeup_Restore(void);
+
+#endif