syslcd.c

内有4510等好几个bsp

/* sysLcd.c - Samsung SBC ARM7 LCD driver routines */

/* Copyright 1984-2001 Wind River Systems, Inc. */
#include "copyright_wrs.h"

/*
modification history
--------------------
01c,26apr01,m_h  convert tabs to spaces for readability
01b,19apr01,m_h  add carriage routine at EOF to avoid compile warning
01a,10apr01,g_h  created

*/

/* includes */

#include "vxWorks.h"
#include "config.h"
#include "string.h"
#include "sysLcd.h"

/*******************************************************************************
*
* sysLcdClear - clear the LCD
*
* This routine clear the LCD panel.
*
* SEE ALSO: sysLcdInit(), sysLcdSetPos(), sysLcdWrite(), sysLcdWriteString().
*
* RETURNS: N/A
*/

void sysLcdClear(void)
    {
    /* Clear LCD */
    LCD_WRITE_COMMAND(LCD_CLEAR_COMMAND);
    
    /* Wait */
    LCD_DELAY(200);
}

/*******************************************************************************
*
* sysLcdInit - initialize the SBC ARM7 board LCD
*
* This routine initializes SBC ARM7 LCD panel. Normally, it is called from 
* sysHwInit() in sysLib.c.
*
* SEE ALSO: sysLcdClear(), sysLcdSetPos(), sysLcdWrite(), sysLcdWriteString().
*
* RETURNS: N/A
*/

void sysLcdInit(void)
    {
    int count;

    LCD_DELAY(200);

    for(count = 0; count < 4; count++)
        {
        LCD_WRITE_COMMAND(LCD_INIT_COMMAND);   /* Write init command */
        
        LCD_DELAY(20000);                      /* Wait */
        }

    LCD_WRITE_COMMAND(LCD_INIT_COMMAND);
    LCD_DELAY(20000);

    LCD_WRITE_COMMAND(LCD_8BIT_2LINE_COMMAND); /* 8Bit, 2 Line */
    LCD_DELAY(20000);                          /* Wait */

    LCD_WRITE_COMMAND(LCD_OFF_COMMAND);        /* Turn off LCD */
    LCD_DELAY(20000);                          /* Wait */

    LCD_WRITE_COMMAND(LCD_CLEAR_COMMAND);      /* Clear LCD */
    LCD_DELAY(20000);                          /* Wait */

    LCD_WRITE_COMMAND(LCD_INCR_MODE_COMMAND);  /* Set INCR mode */
    LCD_DELAY(20000);                          /* Wait */

    LCD_WRITE_COMMAND(LCD_ON_COMMAND);         /* Turn on LCD */
    LCD_DELAY(20000);                          /* Wait */
}

/*******************************************************************************
*
* sysLcdWriteString - write a string to the SBC ARM7 board LCD
*
* This routine write  given string to the SBC ARM7 LCD panel.
*
* SEE ALSO: sysLcdInit(), sysLcdSetPos(), sysLcdWrite(), sysLcdClear().
*
* RETURNS: OK oe ERROR
*/

STATUS sysLcdWriteString(char *string, char lineNumber, char columns)
{
    char *ch;

    /* Set position */
    if(sysLcdSetPos(lineNumber, columns) != OK)
        return(ERROR);

    ch = ((char *)(string));

    /* Write string */
    while(*ch != '\0')
        {
        LCD_DELAY(200);
        sysLcdWrite(*ch);
        ch++;
        }

    LCD_DELAY(200);

    return(OK);
}

/*******************************************************************************
*
* sysLcdWrite - writer character to the SBC ARM7 board LCD
*
* This routine write a character to the SBC ARM7 LCD panel.
*
* SEE ALSO: sysLcdInit(), sysLcdSetPos(), sysLcdClear(), sysLcdWriteString().
*
* RETURNS: N/A
*/

void sysLcdWrite(char ch)
    {
    LCD_WRITE(ch);
    }

/*******************************************************************************
*
* sysLcdSetPos - set the prompt position on the SBC ARM7 board LCD
*
* This routine set the prompt position on the SBC ARM7 LCD panel.
*
* SEE ALSO: sysLcdInit(), sysLcdClear(), sysLcdWrite(), sysLcdWriteString().
*
* RETURNS: OK oe ERROR
*/

STATUS sysLcdSetPos(char line, char column)
    {

    char numOfShift = 0, val;

    /* Check if boundary is legal */
    if(line < LCD_MIN_LINES || line > LCD_MAX_LINES || column < LCD_MIN_COLUMNS || column > LCD_MAX_COLUMNS)
        return(ERROR);

    numOfShift = (7-(line - 1));

    val = ((LCD_LINE_POS_MASK << numOfShift) + (column - 1));

    LCD_WRITE_COMMAND(val);         /* Turn on LCD */

    return(OK);
    }