main.c

Universal cable, USB和RJ45头的Universal电缆的固件代码

/*
The main for uC pic16f688
*/
#include <htc.h>
#include <pic16f688.h>
#include "IntServ.h"
#include "AD.H"
#include "Type.h"


#define PMC(V) if(!V) RC4=1;else RC4=0;////PMC=Z;PMC=0;
#define VP(V) if(V==1) {RA5=1;RC5=0;}\//VP=Z
				else if(V==5) {RA5=0;RC5=0;}\//VP=5V
 					else if(V==10) {RA5=0;RC5=1;}\//VP=10V
						else if(!V) {RA5=1;RC5=0;}//VP=0


int VP_I,VP_U,PMC_I,PMC_U;//VP_I,VP_U: CURRENT & VOLTAGE VALUE OF PIN7 SUPPLY FOR RJ485 TERMINAL
			//PMC_I,PMC_U: CURRENT & VOLTAGE VALUE OF PIN1&3 RETURN FROM RJ485 TERMINAL
unsigned int Time10ms;//10ms timer1

extern int adc[5];
extern bit bShortCurrent;
//extern bit bSC_first;

//ADCs adc[5];  //5 adc channels

void main(void)
{
	char Status=0;
	unsigned int n;
//	bSC_first=0;

	bShortCurrent=0;
	Time10ms=0;

	VP_I=0;
	VP_U=0;
	PMC_I=0;
	PMC_U=0;
//	ini_variable();
	ini_chip();
//	PMC(0);VP(5);		//to test
	PMC(Z);VP(Z);		//Initial state of pin1,3,7 on rj45 terminal
//	PMC(Z);VP(10);		//to test
	n=30000;
	while(n--){;}
	n=30000;
	while(n--){;}
				//wait for 2 seconds, to test

	SWDTEN=1;		//start WDT
//	RA4=0;
	Status=S0_0;		//State machine starts from state0_0
	while(1)
	{

	/*	Arith_AD();
		if(VP_I)
		{
			PMC(Z);VP(Z);

		}*/	//to test short current 
										
		asm("CLRWDT");//clear WDT each while
		//	PMC(Z);VP(5);Arith_AD();//VP(10);
		/*
		if(!pin1 && !pin2)
			{
				PMC(0);VP(10);//Supply 10V
				Status=S0_0;
				Stop_Timer1();
			}
		else if(!pin1 && pin2)
			{
				PMC(0);VP(5);//Supply 5V
				Status=S0_0;
				Stop_Timer1();
			}
		else if(pin1 && !pin2)
			{
				PMC(0);VP(0);//Supply 0V
				Status=S0_0;
				Stop_Timer1();

			}
		else if(pin1 && pin2) //enter auto Detect 
				{
					//switch(Status)
				}
		*/	//auto detection section: not tested
		switch(Status)			//auto Detect state machine
			{

			case S0_0:
							Start_Timer1();
							Status=S0;
							break;
						
				case S0:

							PMC(0);VP(Z);Arith_AD();//sample confitions and adc 
							if(bShortCurrent)	//Adjust if short current occur
							{
								Status=Soff;	//Enter status nerver restored
								break;
							}
							if(Time10ms<=100) //S0: WAIT FOR 1S
							{
								//RA4=1;; ////(!PMC_I && !VP_U)
								//VP_U=VP_U-5;
								//if(VP_U==5)
								if(!PMC_I && !VP_U)
									{
										Status=S0;
										
									}
								else
									{	
										Status=S7;
										Stop_Timer1();

									}
							}
							else 
							{
								Status=S1;
								Stop_Timer1();
								Start_Timer1();
								
							}//jump next status:S1

						
						break;
			case S1:	

							PMC(0);VP(5);Arith_AD();
							if(bShortCurrent)
							{
								Status=Soff;
								break;
							}
							if(Time10ms<=100)
							{
								if(!VP_I)
									{
										Status=S1;
									}//VP_I=0;VP_U=0;PMC_I=0;PMC_U=0;
									
								else
									{
										Status=S2;
										Stop_Timer1();
									}
							}
							else 
							{
								Stop_Timer1();
								Status=S0_0;
							}

						
						break;	
			case S2:
						PMC(0);VP(Z);Arith_AD();
							if(bShortCurrent)
							{
								Status=Soff;
								break;
							}

						if(!PMC_I && !VP_U)
							{Status=S3;}
										
						else
							{Status=S7;}

						
						break;
			case S3:
						PMC(Z);VP(5);Arith_AD();
							if(bShortCurrent)
							{
								Status=Soff;
								break;
							}

						if(50<=PMC_U && PMC_U<270)//0.25V<=PMC:U<1.35V
							{Status=S4;}
						else if(PMC_U<50)
							{Status=S7;}
							else if(PMC_U>=270)
								{Status=S5;}
						break;
			case S4:
						PMC(Z);VP(10);Arith_AD();//VP(10);
							if(bShortCurrent)
							{
								Status=Soff;
								break;
							}
						if(PMC_U<270)
							{Status=S7;}
						else if(PMC_U>=270)
								{Status=S6;}
						break;
			case S5:
						PMC(0);VP(5);Arith_AD();
							if(bShortCurrent)
							{
								Status=Soff;
								break;
							}
						if(VP_I || PMC_U>10)
							{Status=S5;}
						else
							{Status=S0_0;}
						break;
			case S6:
						PMC(0);VP(10);Arith_AD();//VP(10);
							if(bShortCurrent)
							{
								Status=Soff;
								break;
							}
						if(VP_I || PMC_U>10)
							{Status=S6;}
						else
							{Status=S0_0;}
						break;
			case S7:
						PMC(0);VP(Z);Arith_AD();//VP(5) FOR ATV31 DEVICE
							if(bShortCurrent)
							{
								Status=Soff;
								break;
							}
						if(!PMC_I && !VP_U)
							{Status=S0_0;}
						else
							{Status=S7;}
						break;

			default:
					{PMC(Z);VP(Z);
//							RA4=1;bSC_first=1;bShortCurrent=0;
//							n=20000;
//							while(n--){;}//delay 20000*2us=40ms before sampling adc
//							Status=S1;RA4=0;  //test delay time of short current
					}
						//Soff: stop usb cable when short current occurs external device

			}


	//	Arith_AD();	//sample adc
	
	}
}