dk3200_3_demo.c

ST uPSD32XX I2C This example demo code is provided as is and has no warranty, implied or otherwise.

/*---------------------------------------------------------------------------- 
Title: DK3200_3_demo.c
Project Name: keil_8051_test_1.uv2
Date: October 8, 2002
Author: Alec Bath
Description:Simple demo program to demonstrate the I2C IP functionality using a Real Time Clock(M41ST85)

10/18/02 PCL  Modified the code to utlize Switches 1 and 2 to set the Real Time Clock 

Copyright 2002 ST Microelectronics
This example demo code is provided as is and has no warranty,
implied or otherwise.  You are free to use/modify any of the provided
code at your own risk in your applications with the expressed limitation
of liability (see below) so long as your product using the code contains
at least one uPSD products (device).

LIMITATION OF LIABILITY:   NEITHER STMicroelectronics NOR ITS VENDORS OR 
AGENTS SHALL BE LIABLE FOR ANY LOSS OF PROFITS, LOSS OF USE, LOSS OF DATA,
INTERRUPTION OF BUSINESS, NOR FOR INDIRECT, SPECIAL, INCIDENTAL OR
CONSEQUENTIAL DAMAGES OF ANY KIND WHETHER UNDER THIS AGREEMENT OR
OTHERWISE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
----------------------------------------------------------------------------*/ 

#pragma SYMBOLS					                                           // include
#pragma NOAREGS					                                           // include
#pragma CODE					                                           // include assembler listing in .lst file

#include "upsd_hardware.h"		                                           // environment hardware specific defines
#include "upsd3200.h"			                                           // special function register declarations for UPSD

#include "upsd_st85.h"			                                           // M41ST85 Timekeeper routines
#include "upsd_i2c.h"			                                           // I2C routines
#include "lcd_io.h"			                                               // Char LCD routines
#include "upsd_timer.h"			                                           // Timer routines

#include <stdio.h>				                                           // prototype declarations for standard Keil library functions 
#include <string.h>
#include <intrins.h>

xdata PSD_REGS PSD8xx_reg _at_ PSD_REG_ADDR;                               // Define PSD registers at address "csiop" space
extern bit st85_alarm_flag;
extern xdata unsigned char i2c_xmit_buf[256];							   // message xmit buffer
extern xdata unsigned char i2c_rcv_buf[256];							   // message rcv buffer


// MAIN Demo Program

void main (void) {
	WDKEY = 0x55;									                       // disable the watchdog
	PSD8xx_reg.VM |= 0x80;  					                           // enable peripheral I/O mode for LCD display
    timer0_initialize();   	 						                       // initialize timer0 interrupt 
 
    upsd_i2c_init();
   	lcd_init();										                       // initialize LCD. 8 bits, 2 lines, 5x7 font,
	printfLCD("DK3200 for uPSD\n");					                       //display on LCD
	timer0_delay(1000);								                       // delay
	printfLCD("RTC - I2C Demo\n");					                       //display on LCD
	timer0_delay(1000);								                       // delay
	lcd_clear();

	PSD8xx_reg.DIRECTION_B |= 0x03;					                       // set PSD-PB0,1 DDR high
	PSD8xx_reg.DATAOUT_B |= 0x02;					                       // disable LED2

    printfLCD("To Set Time \n");		                                   //display on LCD
    printfLCD("Press sw1 & sw2 \n");	           	                       //display on LCD
   	timer0_delay(2000);	
    lcd_clear();
    
    uPSD_read_clock_init();   											   // Initialize the clock

    while (TRUE){
         uPSD_i2c_st85_read_clock();				                       // Read & Print ST85
         if ((PSD8xx_reg.DATAIN_B &= 0x0c) == 0){	                       // check if both sw1 and sw2 are pressed
           read_switch();												   // if yes, go set the clock
	       lcd_clear();
		   printfLCD("Updating Clock..\n");				                   // display on LCD
	       timer0_delay(1200);			                                   // 1 Sec delay
     	   lcd_clear();
         }
         timer0_delay(100);  					                           // Wait 100 ms
	 }
}


void read_switch (void){
	 int j;
	 printfLCD("To Change Time: \n");		                               //display on LCD
     printfLCD("SW1:Hour SW2:Mins\n");		                               //display on LCD
	 timer0_delay(1200);		
 
	 for (j=0; j<40; j++){
	    timer0_delay(400);		
	    switch (PSD8xx_reg.DATAIN_B | 0xF3) {	   
			case 0xFB: 									                   // for DK3200 board (active lo)	  
 		    {
                lcd_clear();
				set_hour();												   // Set the hour 
                uPSD_i2c_st85_read_clock();				                   // Read & Print ST85
                
				break;
			}
            case 0xF7:
   			{
				 lcd_clear();
				 set_minutes();											   // Set the minute
                 uPSD_i2c_st85_read_clock();				               // Read & Print ST85

		         break; 
 		 	}		
        }

     }
}