main.c

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/* This file has been prepared for Doxygen automatic documentation generation.*/
//  Include files
#include "defines.h"
#include "LCD_driver.h"
#include <inavr.h>


void LCD_timerDelay( unsigned char delay )
{
  __disable_interrupt();
  LCD_timer = delay;                          //Plant LCD_timer seed to generate delay - delay*(1/[LCD frame rate])
  LCD_status.updateComplete = FALSE;          //Clear updateComplete to be able to test if LCD interrupt has been served
  LCD_status.updateRequired = TRUE;           //Request update of the LCD to let the LCD ISR clear set updateComplete
  __enable_interrupt();
  while( !LCD_status.updateComplete );        //Don't update the LCD_displayData into LCD has been updated
}


#define DELAY1 64
#define DELAY2 5

void main(void)
{
    unsigned char counter;
    unsigned char testString[] = "STK502";
    LCD_Init();                 // initialize the LCD

    __enable_interrupt();

    for(;;)                    //endless main loop
    {
//----------------------------------------------------------
// Display a single character from the testString at a time
//----------------------------------------------------------
      for (counter = 0; counter < 6; counter++ )
      {
        while( !LCD_status.updateComplete );        //Don't update the LCD_displayData into LCD has been updated
        LCD_status.updateRequired = FALSE;          //Block the updating of the LCD while accessing LCD_displayData

        LCD_WriteDigit( *(testString + counter), counter+2 ); //Write new data to LCD_displayData

        LCD_status.updateComplete = FALSE;          //Clear LCD_updateComplete flag to indicate that LCDdisplayData
                                                    // has been updated, but LCD has not been updated yet.
        LCD_status.updateRequired = TRUE;           //Request update of the LCD (release LCD update blocking).
      }
       while( !LCD_status.updateComplete );         //Make sure that the LCD_displayData has been latched

//----------------------------------------------------------
// Flash the two Colons on the LCD
//----------------------------------------------------------
      LCD_status.updateRequired = FALSE;          //Block the updating of the LCD while accessing LCD_displayData
      LCD_SET_COLON(TRUE);                        //Display the colons in the LCD
      LCD_timerDelay( DELAY1 );                   //Call LCD interrupt controlled delay

      LCD_status.updateRequired = FALSE;          //Block the updating of the LCD while accessing LCD_displayData
      LCD_SET_COLON(FALSE);                       //Hide the colons in the LCD
      LCD_timerDelay( DELAY1 );                   //Call LCD interrupt controlled delay

//----------------------------------------------------------
// Vary the contrast level between min and max and min, and back to norm
//----------------------------------------------------------
      for(counter = 0x00; counter < 0x0F; counter++)  //Increase LCD contrast to max, in smallest steps
      {
        LCD_CONTRAST_LEVEL(counter);
        LCD_timerDelay( DELAY2 );                   //Call LCD interrupt controlled delay
      }
      for(counter = 0x0F; counter != 0x00; counter--)  //Decrease LCD contrast to min, in smallest steps
      {
        LCD_CONTRAST_LEVEL(counter);
        LCD_timerDelay( DELAY2 );                   //Call LCD interrupt controlled delay
      }
      LCD_CONTRAST_LEVEL( LCD_INITIAL_CONTRAST );   //Contrast level back to initial level

//----------------------------------------------------------
// Clear all LCD digits in within one LCD opdate
//----------------------------------------------------------
      while( !LCD_status.updateComplete );          //Wait for last LCD update to complete
      LCD_status.updateRequired = FALSE;            //Disable further LCD updating
      for (counter = 2; counter < 8; counter++ )
      {
            LCD_WriteDigit( '-', counter );         //Update LCD_displayData buffer
      }
      LCD_status.updateRequired = TRUE;             //Enable LCD opdating
      while( !LCD_status.updateComplete );          //Make sure that the LCD_displayData has been latched...
     }
}

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