this in reference to the line follower made by pratheek

[billhowl]

Download this source code
http://www.societyofrobots.com/member_tutorials/files/Code%20V2.2(SOR)_0.zip

and read this
http://www.societyofrobots.com/member_tutorials/node/361

[nik@sdm]

sir,
how to disable the JTAG pin of the micro controller?

[billhowl]

Read this
http://www.engineersgarage.com/embedded/avr-microcontroller-projects/disable-jtag-port

[nik@sdm]

sir,
what should be connected to the in number 12 and 13 of the microcontroller ?
in the schematics its is mentioned as XTAL1 and XTAL2 ... is it that we need to connect some crystal oscillator...?

but nothing is given in the ckt diagram. i have highlighted them.

[billhowl]

XTAL1 and XTAL2 are for connecting external crystal oscillator, but this project using internal oscillator so no need to connect these two pins, just let it open.

[nik@sdm]

sir,

i read the JTAG disabling tutorial in the link mentioned by u.
there i found the method for disabling the JTAG fuse permanently..... it was mentioned to take the values of lfuse as 0xff and hfuse as 0xc9 (it was mentioned that the value of the fuse bits needs to be 0xc9ff in order to disable the JTAG).

i wrote the  command “avrdude –p <microcontroller code> –c <programmer type> -t” in Command window....
but, in the pictures shown in the website m32(microcontroller code) was used.
since i'm using atmega16 i replaced it as m16...
 also the default values of lfuse n hfuse were different to that compared in the website...but i followed the remaining steps as mentioned...everything went right n the process was over.....
BUT ... thereafter i'm unable to even to program or erase the chip....
it shows the message as "powering on failed"....

now i'm unable to use that particular micro controller.....i think that the lfuse n hfuse values are different to that of
mentioned in the link.....if so is it possible to change the fuse bits again.

[nik@sdm]

sir,

how to generate hex file in avr studio?
i have read the article in engineersgarage.com...... i'm getting a lot of errors.... i have added all the things... source codes lotl.c and lcd.c     and the header files lotl.h , lcd.h and myutils.h.... still i'm unable to build the hex file...

[dpmntrs]

Dear sir,
thanx for the valuable info i recieved here.
im done with pratheek circut diagram of line follower but im not able to connect 4-5wires red black n yellow at the backside of  the board
please spell out those connections, ill be thanlful to u.