lcd_functions.c

来自「SMS傳送Sourcode,compiler with C,AT command」· C语言 代码 · 共 271 行

// This file has been prepared for Doxygen automatic documentation generation.
/*! \file ********************************************************************
*
* Atmel Corporation
*
* - File              : LCD_functions.c
* - Compiler          : IAR EWAAVR 4.11a
*
* - Support mail      : [e-mail]
*
* - Supported devices : All devices with a UART/USART can be used.
*                       The example is written for ATmega169
*
* - AppNote           : AVR323 - Interfacing GSM modems
*
* - Description       : Example of how to use AT-Commands to control a GSM modem
*
* $Revision: 1.1 $
* $Date: Tuesday, November 08, 2005 12:25:32 UTC $
*****************************************************************************/


//  Include files
#include"iom169.h"
#include"main.h"
#include"Lcd_driver.h"
#include"Lcd_functions.h"
#include"BCD.h"

#define FALSE   0
#define TRUE    (!FALSE)

char CONTRAST = LCD_INITIAL_CONTRAST;

// Start-up delay before scrolling a string over the LCD. "LCD_driver.c"
extern char gLCD_Start_Scroll_Timer;

/****************************************************************************
*
*	Function name : LCD_puts_f
*
*	Returns :		None
*
*	Parameters :	pFlashStr: Pointer to the string in flash
*                   scrollmode: Not in use
*
*	Purpose :		Writes a string stored in flash to the LCD
*
*****************************************************************************/

void LCD_puts_f(char __flash *pFlashStr, char scrollmode)
{
    char i;

    while (gLCD_Update_Required);      // Wait for access to buffer

    for (i = 0; pFlashStr[i] && i < TEXTBUFFER_SIZE; i++)
    {
        gTextBuffer[i] = pFlashStr[i];
    }

    gTextBuffer[i] = '\0';

    if (i > 6)
    {
        gScrollMode = 1;        // Scroll if text is longer than display size
        gScroll = 0;
        gLCD_Start_Scroll_Timer = 3;    //Start-up delay before scrolling the text
    }
    else
    {
        gScrollMode = 0;
        gScroll = 0;
    }

    gLCD_Update_Required = 1;
}


/****************************************************************************
*
*	Function name : LCD_puts
*
*	Returns :		None
*
*	Parameters :	pStr: Pointer to the string
*                   scrollmode: Not in use
*
*	Purpose :		Writes a string to the LCD
*
*****************************************************************************/
void LCD_puts(char *pStr, char scrollmode)
{
    char i;

    while (gLCD_Update_Required);      // Wait for access to buffer

    for (i = 0; pStr[i] && i < TEXTBUFFER_SIZE; i++)
    {
        gTextBuffer[i] = pStr[i];
    }

    gTextBuffer[i] = '\0';

    if (i > 6)
    {
        gScrollMode = 1;        // Scroll if text is longer than display size
        gScroll = 0;
        gLCD_Start_Scroll_Timer = 3;    //Start-up delay before scrolling the text
    }
    else
    {
        gScrollMode = 0;
        gScroll = 0;
    }

    gLCD_Update_Required = 1;
}


/****************************************************************************
*
*	Function name : LCD_putc
*
*	Returns :		None
*
*	Parameters :	digit: Which digit to write on the LCD
*                   character: Character to write
*
*	Purpose :		Writes a character to the LCD
*
*****************************************************************************/
void LCD_putc(char digit, char character)
{
    if (digit < TEXTBUFFER_SIZE)
        gTextBuffer[digit] = character;
}


/****************************************************************************
*
*	Function name : LCD_Clear
*
*	Returns :		None
*
*	Parameters :	None
*
*	Purpose :		Clear the LCD
*
*****************************************************************************/
void LCD_Clear(void)
{
    char i;

    for (i=0; i<TEXTBUFFER_SIZE; i++)
        gTextBuffer[i] = ' ';
}


/****************************************************************************
*
*	Function name : LCD_Colon
*
*	Returns :		None
*
*	Parameters :	show: Enables the colon if TRUE, disable if FALSE
*
*	Purpose :		Enable/disable colons on the LCD
*
*****************************************************************************/
void LCD_Colon(char show)
{
    gColon = show;
}


/****************************************************************************
*
*	Function name : LCD_UpdateRequired
*
*	Returns :		None
*
*	Parameters :	update: TRUE/FALSE
*                   scrollmode: not in use
*
*	Purpose :		Tells the LCD that there is new data to be presented
*
*****************************************************************************/
void LCD_UpdateRequired(char update, char scrollmode)
{

    while (gLCD_Update_Required);

    gScrollMode = scrollmode;
    gScroll = 0;

    gLCD_Update_Required = update;
}


/****************************************************************************
*
*	Function name : LCD_FlashReset
*
*	Returns :		None
*
*	Parameters :	None
*
*	Purpose :		This function resets the blinking cycle of a flashing digit
*
*****************************************************************************/
void LCD_FlashReset(void)
{
    gFlashTimer = 0;
}



/****************************************************************************
*
*	Function name : SetContrast
*
*   Returns :       char ST_state (to the state-machine)
*
*   Parameters :    char input (from joystick)
*
*	Purpose :		Adjust the LCD contrast
*
*****************************************************************************/
char SetContrast(char input)
{
    static char enter = 1;
    char CH, CL;

    if (enter)
    {
        LCD_Clear();
        enter = 0;
    }

    CH = CHAR2BCD2(CONTRAST);
    CL = (CH & 0x0F) + '0';
    CH = (CH >> 4) + '0';

    LCD_putc(0, 'C');
    LCD_putc(1, 'T');
    LCD_putc(2, 'R');
    LCD_putc(3, ' ');
    LCD_putc(4, CH);
    LCD_putc(5, CL);

    LCD_UpdateRequired(TRUE, 0);

    if (input == KEY_PLUS)
        CONTRAST++;
    else if (input == KEY_MINUS)
        CONTRAST--;

    if (CONTRAST == 255)
        CONTRAST = 0;
    if (CONTRAST > 15)
        CONTRAST = 15;

    LCD_CONTRAST_LEVEL(CONTRAST);




    return 1;
}