/*
Demo5.c: 1. To read and write NVRAM(0 to 30 totally 31 bytes)
         2. It can read and write NVRAM in any number of cycles
         3. Li-battery for data backup, 10 yeasr in the normal condition

Compiler: BC++ 3.1, 
          Turbo C ++ 1.01(3.01) (free from http://community.borland.com/museum)

Compile mode: Large

Project: Demo5.c
         ..\..\lib\7188el.lib
         
Hordware: 7188E

Note: ReadRTC, WriteRTC
      addr: 32-63 for NVRAM
      addr: 0-7 Time, Date
      addr: 8,Control register. Bit7=1:Write protect, 0:Write enable
      If set this bit=1, cannot write data to RTC(time, date, NVRAM)
      that is you can not set new time or date form ROM DOS command
      TIME, DATE. and you cannot write new data to NVRAM.

[05/Dec/2006] by Liam
[July,13,2011] by Nicholas
*/

#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
#include <dos.h>
#include <string.h>
#include "..\..\lib\7188e.h"

void ReadRTC(int addr, int *data);
void WriteRTC(int addr, int data);

int data;

void main(void)
{ 
    unsigned int i=0, j=0;
    int idx, regidx, quit;
    char c, cmd[20];
    unsigned char NVRAM[31];

    InitLib();              /* driver initial       */
    Init5DigitLed();        /* 5-digit LED initial  */

    Show5DigitLed(3, 17);        /* show "-" in 5-digit LED */
    for(j=0; j<=8; j++)
    {
        ReadRTC(j, (int *)&i);
        Print("\n\rClock[%d]=%02X", j, i);
    }
    
    ReadRTC(7, (int *)&j);
    if(j&0x80)
        Print("\n\rCurrent is Write Protect");
    else
    {
        Print("\n\rCurrent is Write Enable");
        WriteRTC(7, 0x80);  /* write protect */
        Print("\n\rNow Set to Write Protect");
    }
    
    /* read current NVRAM 0-31 */
    for(j=0; j<31; j++)
    {
        NVRAM[j]=ReadNVRAM(j);
    }
    
    Print("\n\rCurrent Values are:\n\r");
    for(j=0; j<31; j++)
        Print("%3d ", NVRAM[j]);
        
    for(j=0; j<31; j++)
        NVRAM[j]++;
    
    for(j=0; j<31; j++)
        WriteNVRAM(j, NVRAM[j]);     /* write to NVRAM for test */
    
    Print("\n\rAfter write Values are:\n\r");
    for(j=0; j<31; j++)
        Print("%3d ", ReadNVRAM(j));

    WriteRTC(7, 0x00);   /* write enable */
    Print("\n\rNow Set to Write Enable");
    for (j=0; j<31; j++)
        WriteNVRAM(j,NVRAM[j]);     /* write to NVRAM for test */
        
    Print("\n\rAfter write Values are:\n\r");
    for(j=0; j<31; j++)
        Print("%3d ", ReadNVRAM(j));
    
    quit=0;
    cmd[0]=0;
    idx=0;
    regidx=0;
    
    Print("\n\rdemo5>");
    while(!quit)
    {
        if(Kbhit())
        {
            switch(c=Getch())
            {
                case 'q':
                case 'Q':
                    quit=1;
                    
                case '\r':
                    Putch('\r');
                    Putch('\n\r');
                    cmd[idx]=0;
                    switch(cmd[0])
                    {
                        case 'a':   /* set all to xx */
                        case 'A':
                            data=atoi(cmd+2);
                            for(j=0; j<31; j++)
                                WriteNVRAM(j, data);
                                
                            Ungetch('s');
                            Ungetch('\r');
                            break;
                            
                        case 's':   /* show all */
                        case 'S':
                            for(j=0; j<31; j++)
                                Print("%3d ", ReadNVRAM(j));
                            break;
                        
                        case 'r':   /* set register idx */
                        case 'R':
                            regidx=atoi(cmd+1);
                            Print("\n\rset idx to %d", regidx);
                            break;
                            
                        case 'd':   /* show current register value */
                        case 'D':
                            ReadRTC(regidx+32, &data);
                            Print("\n\ridx=%d data=%d", regidx, data);
                            break;
                        
                        default:
                            if(cmd[0]>='0' && cmd[0]<='9')
                            {
                                /* set value to current register */
                                data=atoi(cmd);
                                WriteNVRAM(regidx,data);
                                Print("\n\rwrite %d to index %d",data,regidx);
                            }
                    }
                    idx=0;
                    Print("\n\rdemo5>");
                    break;
                    
                case '\b':
                    if(idx)
                    {
                        cmd[--idx]=0;
                        Putch(c);
                    }
                    break;
                    
                default:
                    cmd[idx++]=c;
                    Putch(c);
                    break;
            }
        }
    }
}