請先看『使用說明』

From LEXWiKi

The Sample code source you can download from

How to use this Demo Application

Introduction

Initial internal F81801

void F81801U_Init()
{
	 F81801U_Write(Logic_Device_Number_Register, GPIO_Device_Configuration_Registers);// GPIO Device Configuration Registers (LDN CR06) 
 
	 F81801U_Write(GPIO3_Output_Enable_Register, 0xf0);//GPIO34~GPIO37 OUTPUT SET / GPIO30~GPIO33 INPUT SET
	 F81801U_Write(GPIO3_Drive_Enable_Register, 0xf0);//GPIO34~GPIO37 DRIVE SET
  
	 F81801U_Write(Logic_Device_Number_Register, WDT_Registers);
	 F81801U_Write(WDTDE, 0x01);
	 F81801U_Write(WDT_REG1, 0x40);
	 F81801U_Write(WDOUT_EN, 0x80);
}