lcd.c

低价位瑞萨单片机的水表程序

/************************************************************************/
/* Renesas System Solutions (Beijing) Co., LTD.							*/
/* All rights reserved.													*/
/*																		*/
/* File Name		: LCD.c												*/
/* Description		: 													*/
/*																		*/
/* Current Version	: 1.0												*/
/* Designer			: Feng Jun											*/
/* Start Date		: 2006-11-6											*/
/* Complete Date	: 2006-11-22										*/
/*																		*/
/* Lastest Version	:													*/
/* Designer			:													*/
/* Start Date		: 													*/
/* Complete Date	: 													*/
/************************************************************************/
#include <stdio.h>
#include "LCD.h"
#include "main.h"

extern char eeprombuffer[32];

union byte_def senddataaddr;
#define senddata	senddataaddr.byte
#define	a0			senddataaddr.bita.b0
#define	a1			senddataaddr.bita.b1
#define	a2			senddataaddr.bita.b2
#define	a3			senddataaddr.bita.b3
#define	a4			senddataaddr.bita.b4
#define	a5			senddataaddr.bita.b5
#define	a6			senddataaddr.bita.b6
#define	a7			senddataaddr.bita.b7

union byte_2 hex2bcdaddr;
#define hex2bcd		hex2bcdaddr.word
#define hex2bcdH	hex2bcdaddr.byte.high
#define hex2bcdL	hex2bcdaddr.byte.low

char sendbuffer[6];	
char conbuffer[6];

extern void EEPROMReadNBytes(char *buffer, char n, char addr);

/*************************************************************************
Name: 			Delay4nop
Parameters: 	None
Returns: 		None
Description: 	Delay4nop
*************************************************************************/
void Delay4nop(void)
{
	nop_instruction();
	nop_instruction(); 
	nop_instruction(); 
	nop_instruction(); 
}


/*************************************************************************
Name: 			LCDSendBit
Parameters: 	None
Returns: 		None
Description: 	Send one bit to LCD
				Data will be sent to LCD when a rising edge happens at CLK
*************************************************************************/
void LCDSendBit(void)
{
	io_LCDCLK = 0;
	Delay4nop();
	io_LCDCLK = 1;
	Delay4nop();
}	


/*************************************************************************
Name: 			LCDSend8bit
Parameters: 	None
Returns: 		None
Description: 	Send 8bit data to LCD
*************************************************************************/
void LCDSend8bit(void)
{
	io_LCDDI = a7;
	LCDSendBit();
	io_LCDDI = a6;
	LCDSendBit();
	io_LCDDI = a5;
	LCDSendBit();
	io_LCDDI = a4;
	LCDSendBit();
	io_LCDDI = a3;
	LCDSendBit();
	io_LCDDI = a2;
	LCDSendBit();
	io_LCDDI = a1;
	LCDSendBit();
	io_LCDDI = a0;
	LCDSendBit();
}	

/*************************************************************************
Name: 			LCDReset
Parameters: 	None
Returns: 		None
Description: 	LCD reset
*************************************************************************/
void LCDReset(void)
{
	io_LCDCS = 1;			/* Disable LCD */
	Delay4nop();
	io_LCDCS = 0;			/* Enable LCD */
	
/* Send command "100" */
	io_LCDDI = 1;
	LCDSendBit();
	io_LCDDI = 0;
	LCDSendBit();
	io_LCDDI = 0;
	LCDSendBit();

	senddata = 0;			/* Turn off both system oscillator and LCD bias generator */
	LCDSend8bit();			/* Command is 9bit */
	LCDSendBit();
	senddata = 2;			/* Turn off LCD output */
	LCDSend8bit();
	LCDSendBit();
	senddata = 1;			/* Turn on system oscillator */
	LCDSend8bit();
	LCDSendBit();
	senddata = 3;			/* Turn on LCD output */
	LCDSend8bit();
	LCDSendBit();
	senddata = 0x29;		/* Set LCD mode */
	LCDSend8bit();
	LCDSendBit();
}



/*************************************************************************
Name: 			DisableLCD
Parameters: 	None
Returns: 		None
Description: 	Disable LCD
*************************************************************************/
void DisableLCD(void)
{
	io_LCDCS = 1;			/* Disable LCD */
	Delay4nop();
	io_LCDCS = 0;			/* Enable LCD */
	
/* Send command "100" */
	io_LCDDI = 1;
	LCDSendBit();
	io_LCDDI = 0;
	LCDSendBit();
	io_LCDDI = 0;
	LCDSendBit();

	senddata = 0;			/* Turn off both system oscillator and LCD bias generator */
	LCDSend8bit();			/* Command is 9bit */
	LCDSendBit();
	senddata = 2;			/* Turn off LCD output */
	LCDSend8bit();
	LCDSendBit();
	
}
/*************************************************************************
Name: 			LCDWriteRAM
Parameters: 	None
Returns: 		None
Description: 	Write all the data to RAM, successive address writing mode
*************************************************************************/
void LCDWriteRAM(void)
{
	int i;
	
	io_LCDCS = 1;			/* Disable LCD */
	Delay4nop();
	io_LCDCS = 0;			/* Enable LCD */
	
/* Send ID "101" */
	io_LCDDI = 1;
	LCDSendBit();
	io_LCDDI = 0;
	LCDSendBit();
	io_LCDDI = 1;
	LCDSendBit();

/* Send 6bit start address */
	io_LCDDI = 0;
	LCDSendBit();
	LCDSendBit();
	LCDSendBit();
	LCDSendBit();
	LCDSendBit();
	LCDSendBit();
	
/* Send 5byte data */
	for (i=0; i<6; i++)
	{
		senddata = sendbuffer[i];
		LCDSend8bit();
	}
				
	io_LCDCS = 1;			/* DIsable LCD */
}

/*************************************************************************
Name: 			TransferHexToBCD
Parameters: 	None
Returns: 		None
Description: 	Transfer hex to BCD
*************************************************************************/
void TransferHexToBCD(int data)
{
	sprintf(conbuffer, "%d", data);
}

/*************************************************************************
Name: 			DispConvert
Parameters: 	None
Returns: 		None
Description: 	
*************************************************************************/
char DispConvert(char data)
{
	switch ( data )
	{
		case '0':
				return 0xfa;	/* 0: '11111010' */
		case '1':
				return 0x0a;	/* 1: '00001010' */
		case '2':
				return 0xbc;	/* 2: '10111100' */
		case '3':
				return 0x9e;	/* 3: '10011110' */
		case '4':
				return 0x4e;	/* 4: '01001110' */
		case '5':
				return 0xd6;	/* 5: '11010110' */
		case '6':
				return 0xf6;	/* 6: '11110110' */
		case '7':
				return 0x8a;	/* 7: '10001010' */
		case '8':
				return 0xfe;	/* 8: '11111110' */
		case '9':
				return 0xde;	/* 9: '11011110' */
		default :
				return 0;		/* Blank */
	}
}

/*************************************************************************
Name: 			LCDDisplay
Parameters: 	None
Returns: 		None
Description: 	Display some infomation on LCD such as surplus and the 
				status of water meter
*************************************************************************/
void LCDDisplay(void)
{
	int i;
	int j = 0;
/* Get data that to be shown */
//	EEPROMReadNBytes(eeprombuffer, 40, 0);
	EEPROMReadNBytes(sendbuffer, 2, 0x14);
	hex2bcdH = sendbuffer[0];
	hex2bcdL = sendbuffer[1];
	if (hex2bcd == 0)
	{
		EEPROMReadNBytes(sendbuffer, 2, 0x1a);
		hex2bcdH = sendbuffer[0];
		hex2bcdL = sendbuffer[1];
		B_dispnegative = 1;
	}
	TransferHexToBCD( hex2bcd );
	
	for (i=0; i<4; i++)
	{
		if (conbuffer[3-i] == 0)
		{
			sendbuffer[1+i] = 0;
		}
		else
		{
			sendbuffer[4-j] = DispConvert(conbuffer[3-i]);
			j++;
		}
	}
	sendbuffer[0] = 0;
	sendbuffer[5] = 0x80;
	
	if (B_dispnegative == 1)
	{									/* Display negative */
		for (i=0; i<4; i++)
		{
			if (sendbuffer[i]==0 && sendbuffer[i+1]!=0 && sendbuffer[i+1]!=0xfa)
			{
				sendbuffer[i] = 0x04;	/* '-': '00000100' */
			}
		}
	}
	if (B_dispvalve == 1)
	{									/* Display valve closed */
		sendbuffer[4] |= 0x01;			/* Display '关阀' */
	}
	if (B_errorcard == 1)
	{									/* Display error card */
		sendbuffer[5] |= 0x01;			/* Display '读卡错' */
	}
	if (B_warning == 1)
	{									/* Display warning */
		sendbuffer[5] |= 0x02;			/* Display '交费' */
	}
	if (B_lowvoltage == 1)
	{									/* Display low voltage */
		sendbuffer[5] |= 0x08;			/* Display '电压低' */
	}
/* test */
//	sendbuffer[0] = 0xfa;			/* 0 */
//	sendbuffer[1] = 0x0a;			/* 1 */
//	sendbuffer[2] = 0xbc;			/* 2 */
//	sendbuffer[3] = 0x9e;			/* 3 */
//	sendbuffer[4] = 0x4e;			/* 4 */
//	sendbuffer[5] = 0x10;			/* 5 */
/* test end */


/* Send data to LCD */
	ioD_LCDCLK = 1;			/* Set direction */
	ioD_LCDDI = 1;
	ioD_LCDCS = 1;

	LCDReset();				/* LCD reset */

	LCDWriteRAM();			/* Write LCD's RAM */

	g_statusA = 4;			/* To detect flow */
	
/* test */
//	B_openvalve = 1;
//	B_closevalve = 1;
	
/* test end */

}