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How to use ATMEL ISP. To use this ATMEL ISP board you need to download software ISP-3v0 developed by Muhammad Asim Khan and distributed by Prof. Wichit 's website or download at the buttom on this page.  Fig.3 Software ATMEL ISP V3.0 After download software. 1. Connect ATMEL ISP cable to PC parallel port and power supply. (see Fig.5) 2. Run software ISP3.0 for Windows95/98/ME use ISP-3v0.exe and WindowsXP/2000/NT use ISP-XP.bat . 3. Select your devices from drop down list menu. 4. Click "Open file" to open hex file. 5. Click "Write" to program device. How to use RS232 port. To use RS232 port ,first build a simple RS232 cable.  Fig. 4 RS232 cable |
 Fig.5 |
| Example program to blink led on port2 (Compile with KEIL C51) | ||||
#include <reg52.h>
//=========================
// delay function
//=========================
void delay(int del_val)
{
int i,k;
for(i=0;i<=del_val;i++)
for(k=0;k<=50;k++);
}
//=== main program =========
void main()
{
int count,patt;
while(1)
{
patt=0x1; // 00000001
for(count=0;count<=8;count++)
{
P2=~patt;
patt=patt<<1;
delay(1000);
}
patt=0x80; // 10000000
for(count=0;count<=8;count++)
{
P2=~patt;
patt=patt>>1;
delay(1000);
}
}
} // end of main program
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