keyborad scaning c program please explain

[thannara123]

No sir I haven't hardware debugger may i know more about it ..

Finally solved .....
thanks to all

 

[jayanth.devarayanadurga]

How did you solve the problem?

 

[bigdogguru]

The three most common hardware debuggers available from Atmel:

AVR Dragon

AVR JTAGICE mkII

AVR JTAGICE3


There are clones available for the original JTAGICE and the JTAGICE mkII:

**broken link removed**

**broken link removed**

Just search eBay for JTAGICE.


There are also design plans, schematics and firmware available for the original JTAGICE:

Build your own AVR JTAG ICE clone

AVR JTAG Debugger/Programmer

Make your own AVR JTAG debugger


Hardware debuggers allow code execution to be momentarily pause so that the current value contained within variables can be observed at that point in execution.

You can also single step through each line of code to observe the effect on variable, output ports and other states of the device.

I believe the original JTAGICE is not longer supported in the latest version of AVR Studio, you may have to use AVR Studio 4 or purchase a Dragon, JTAGICE mkII or JTAGICE3 if you wish to use AVR Studio 6 or later

Knowledge of hardware debugging is a very powerful tool when developing code.

BigDog

 

[thannara123]

How did you solve the problem?

 if[COLOR="#FF0000"](pos==3[/COLOR])
              {
                return(((1000*key[0])+(100*key[1])+(10*key[2])+key[3]));        //save the password in 16 bit integer
                //return(1234);
                break;
                //Wait for enter key or reset key

changed

 if[COLOR="#FF0000"](pos==4)[/COLOR]
              {
                return(((1000*key[0])+(100*key[1])+(10*key[2])+key[3]));        //save the password in 16 bit integer
                //return(1234);
                break;
                //Wait for enter key or reset key

thanks again

 

[bigdogguru]

The following is another demo for the newer JTAGICE mkII:

The video demonstrates many of the features available in a hardware debugger.

BigDog

 

[thannara123]

thanks ..
i got the concept of debugger .
its really healpful ...