init_system.c

用凌阳单片机编写用超声波水位测量程序

/************************************************************************
**Program Name: Init_System.c
** Copyright (c) 2001-2005 HUST EEIC CREATIVE NO.1 Workgroup
**Creator: Dasher Dan
**Date: 02-08-2005
**Description: This program is used to initialize SPCE061 system at the begining of each program
			  and also include some frequently used subfunctions
**Version Number: 1.0
************************************************************************/

#include "hardware.h"
#include "Init_System.h"
#include "led.h"
#include "Try1.h"


void Init_System()
{
	__asm("INT OFF");
	
	Init_IO( );
	Init_Time();
	Init_INT();
	Init_ADC();
	Init_DAC();
	Init_SIO();
	Init_UART();
	Init_7219();
	*P_INT_Ctrl=0x8000;
	__asm("INT FIQ,IRQ");
}



/************************************************************* 
**Function name: Init_IO() ;        

**Input:
**0 0 0---带下拉电阻输入
**0 0 1---带上拉电阻输入
**0 1 0---悬浮输入
**0 1 1---悬浮输入
**1 0 0---反向输出高
**1 0 1---反向输出低
**1 1 0---缓存输出低
**1 1 1---缓存输出高     

Output: none

**Description: this function is used to initialize SPCE061 IO port
//KEYBOARD 9IO---IOA0--IOA4 IN IOA5--IOA8 OUT
//DISPLAY MAX7219 3IO---CLK--IOB0 OUT,DIN--IOB1 OUT,LD--IOB2 OUT
//RECEIVE ULTRASONIC EXT2---IOB3 IN UP DRAG
//TRANSMIT ULTRASONIC IOB4---IOB4 OUT LOW DRAG
//ELECTRIC VALVE 2IO--- IOB5 OUT LOW DRAG, IOB6 OUT LOW DRAG
//UART 2IO---RX--IOB7  IN, TX--IOB10  OUT
**Return: none                                                                        
**************************************************************/                   

void Init_IO()
{
	*P_IOA_Dir = 0x01e0;
	*P_IOA_Attrib = 0x01e0;
	*P_IOB_Dir = 0x0477;
	*P_IOB_Attrib = 0x0477;
	*P_IOB_Data = 0x040f;
	
	*P_FeedBack = 0x0000;

	CLEAR_WATCHDOG;
}
/************************************************************* 
**Function name: Init_Time()

**Input: none

**Output: none

**Description: this function is used to initialize SPCE061 System Clock, WatchDog,
			  LVD, TimerA, TimerB
Use TimerA to count, so as to calculate the distance 

**Return: none                                                                        
**************************************************************/
void Init_Time()
{
	*P_SystemClock = (C_Fosc_Div_1|C_AutoMode|C_32K_Off|C_Fosc_40M);
	
	*P_TimeBase_Setup = (C_TMB1_8Hz|C_TMB2_128Hz);
	*P_TimeBase_Clear = C_TMBCLR;
	
	*P_TimerA_Data = 0x0000;			
	*P_TimerA_Ctrl = (C_SourceA_Fosc2|C_SourceB_1|C_DutyOff);	//ready to count, 20M Hz
	
	*P_TimerB_Data = 0x0000;
	*P_TimerB_Ctrl = (C_SourceC_0|C_DutyOff);				//Close PWM
	
	CLEAR_WATCHDOG;
}


/************************************************************* 
**Function name: Init_INT()

**Input: none

**Output: none

**Description: this function is used to initialize SPCE061 interrupt system

**Return: none                                                                        
**************************************************************/   
void Init_INT()
{
	*P_INT_Ctrl=(C_IRQ5_4Hz);
	
	CLEAR_WATCHDOG;

}


/************************************************************* 
**Function name: Init_ADC()

**Input: none

**Output: none

**Description: this function is used to initialize SPCE061 ADC

**Return: none                                                                        
**************************************************************/   
void Init_ADC()
{
	CLEAR_WATCHDOG;
}


/************************************************************* 
**Function name: Init_DAC()

**Input: none

**Output: none

**Description: this function is used to initialize SPCE061 DAC

**Return: none                                                                        
**************************************************************/
void Init_DAC()
{
	CLEAR_WATCHDOG;
}


/************************************************************* 
**Function name: Init_UART()

**Input: none

**Output: none

**Description: this function is used to initialize SPCE061 UART 

**Return: none                                                                        
**************************************************************/   
void Init_UART()
{
	CLEAR_WATCHDOG;
}


/************************************************************* 
**Function name: Init_SIO()

**Input: none

**Output: none

**Description: this function is used to initialize SPCE061 SIO Clock

**Return: none                                                                        
**************************************************************/  
void Init_SIO()
{
	
	*SIO_Ctrl = 0xc9;
	CLEAR_WATCHDOG;
}


/************************************************************* 
**Function name: Delay()

**Input: unsigned int Delay_Time

**Output: none

**Description: Each Delay_Time Delay 1 circle

**Return: none                                                                        
**************************************************************/  
void Delay(unsigned int Delay_Time)
{
	unsigned int i;
	
	for(i=0;i<Delay_Time;i++)
	{
		CLEAR_WATCHDOG;
	}
}


/************************************************************* 
**Function name: Delay1()

**Input: unsigned int Delay_Time

**Output: none

**Description: Each Delay_Time Delay 65535 circles

**Return: none                                                                        
**************************************************************/  
void Delay1(unsigned int Delay_Time)
{	
	unsigned int ii,i;
	
	for(ii=Delay_Time;ii>0;ii--)
	{
		for(i = 65535; i>0; i--)
		CLEAR_WATCHDOG;
	}
}