HP InfoTech presents a new version of the most popular (more than 17300 registered users) commercial C Compiler for the Microchip AVR microcontrollers. This entry was posted in Electronics and tagged avr, diy, jtag by admin. IVL1-7/5 Russian Vacum Tube (VFD) Clock – Part 1.IV-18 VFD vacuum Russian Clock (part 1).
IV-18 VFD vacuum Russian Clock (part 2). Nop() // added some nop, to slow the clock a bit Of course I don’t have this kind generator at home, but this can be easily done with another AVR micro this something like this: void main() Of course, you need a external clock at something like 1Mhz. Simply plug a external clock on the clock pin (XTAL1 on the Mega32), and changes the fuses by this way. On every AVR micro, you can use a external clock if you messed the fuses settings. And a really kool guy (“rue_mohr”) give me this tips. 
In fact, I decided to ask on the #avr channel on freenode.
Use an external clock (This is what I used, and describe here)Īs, I don’t have any Jtag, or STK500, the only way to fix that is to use an external clock. The only one I know right now is the STK500 This kind of programmer aren’t really easy to find. Use a high voltage programmer (you can erase the fuse, with a programmer that do a parallel programming with RESET plug to a 12v PSU). Use a Jtag (as it doesn’t need a clocked micro). So my ATMega was totally frozen, as the clock settings was wrong, I was unable to reflash it, and worst, unable to change the fuses.Īfter a little googling, I found there is 3 ways to fixe this kind of issue: I don’t know how, but I choose the low freq clock. I changed the fuses with the help of the Avr Fuse Calculator, but I messed my ATMega with the wrong clock source. To disable the Jtag, you simply need to change some fuses. In fact, I wanted to disable the Jtag support on the chips because I need to use the pins used by the Jtag (PC2-PC5). Yesterday, I ran into a issue with an ATMega32.
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