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Hi, I first time try to work on AVRs(Atmega64). When try to program it with Bascom11173 and STK200. It looks it work only first time, when I do some changes in fuse bits it then never again be connected/detected. Now the device is no more detected by Bascom, also tried PonyProg2000 but could not succeeded. My question is that is there any po
Your problem is that your chip is waiting for the external oscilator to start working :D it doesn't work anymore from the internal oscilator. You can attach a crystal to the chip and program the fuse bits to internal oscilator again, then you can remove the crystal again. Shereef hi yes, your problem is external clock.
hi guys i am faced with this problem that after writing my code and after building the solution when i just move on to download it to my mcu through my setup of avrstudio4 with winavr as compiler and stk500 attached to comp via rs232 and to target via isp 6 pin cable ..... the interface do open for setting the various values like fuse
actually i messed up with fuse bits of atmega 32l and now they are not giving me the way..... how to erase and restore the mcu .. please comment.......... simple chip erase using high voltage seriel programming also is not working
well u can use BASCOM AVR to change the fuse bit so easy. try it as i show in the picture u can change what u need .
Do you know how to change the fuse bits in running mode I use IAR compiler. Thanks in advance
ATMega8 fuse Calculator AVR fuse Calculator for ATmega8 here you are
Every one when new to AVR got into trouble with fuse bits. You should be careful while setting fusebits. Double check before writing fusebits. If you messed up with fusebits then the avr wont behave as it should and you need a high voltage parallel (...)
I used an Atmega8 whose fuse bits was not set to use an external oscillator(fuse bits were at factory settings), in a circuit with a 12Mhz oscillator and powered on the circuit. needless to say the program did not work. Now when I try to program this Atmega8, Avrdude says "AVR device not responding" Is there any way (...)
Hi, need me help. I make programmer for AVR microcontrollers, with ATmega8.But I'm not sure whether I correctly set fuse bits. I am read datasheet but I don't understand fully datasheet. I am set low fuse bits 0xD9 and high fuse bits 0xE1. I using 12MHz quartz oscillator. Lock (...)
I don't have any experience with this but you can check avr-libc: fuse.h>: fuse Support Alex
hi......... can anyone please tell me what actually fuse bits are??? I know its used for configuring ports and peripherals in microcontrollers... but how is it actually implemented and which all registers are used for it if we refer to pic controllers....also can we do it in the main program by accessing the respective registers.... Thanks i
The fuse bits available in each mcu model are described in the datasheet in the memory programming section. The main fuses you need to set are usually the ones related to the clock source selection. If you want to use the jtag pins as I/O then you need to disable JTAGEN. Don't change SPIEN because it can disable the serial programming. (...)
Hi, This was my only problem which I am always facing after moving from pic to avr. I am using usbasp programmer. Lot of avr chips are screwed due to fusebit problem. But the interesting thing is, it is getting screwed some time even if we are not doing any thing on the fuse. Just burning flash also makes the fuse bits (...)
lower fuse = 0xFF higher fuse = 0xC9 A simple google u would have got lots of help
Page 25/26 of the datasheet The CKOPT fuse selects between two different Oscillator amplifier modes. When CKOPT is programmed, the Oscillator output will oscillate will a full rail- to-rail swing on the output. This mode is suitable when operating in a very noisy environment or when the outpu
No, you cannot use ISP for further programming if the RSTDISBL fuse it's clear. You have to use a parallel programmer to change fuse or programming
Dear all, do you have a schematic or know link of a project wich can be used for unprogramming rstdisbl and spien fuse bits ? cause they can be programmed by ISP prorgrammer but can't be unprogrammed by ISP any more so a high voltage programmer should be used ... i found a project for high voltage programmer, but if there is a circuit wich onl
SinaProg - AVRProg GUI for AVRDUDE 5.6 with AVR fuse or ____[url=htt
SinaProg 1.4.5.8 - AVRDUDE-GUI with AVR fuse or ____[url=rapidsh
Hi guys, i need to restore a protected PIC to reprogramm only the fuses. Is it possible? Thank You.
SinaProg 1.4.5.10 - AVRProg GUI for AVRDUDE 5.10 with AVR fuse or ____[
Hi everybody, how’s going. This one of my firsts posts. I’ve been working in a project and one of the problems or something a little bit difficult to understand (if like me it’s the first time using AVR’s ) had been the fuse configuration. Here i left some interesting and useful links.
SinaProg 1.5.5.10 - AVRDUDE-GUI with AVR fuse Calculator * Download __________ __________ * Guideline __________* You can edit the file "fuses.txt", to add your comments for
I wanted to program my Atmega32L to external crystal oscillator using Ponyprog. Targe fuse settings: high: C9 low: EF Previously it was default factory setting: 99 E1. When I pushed write all in fuse settings in ponyprog, I got "fuse write failed" and it did not recognize the chip after that. I got a "Xeltek Superpro 580U" universal (...)
The project can be found Atmega HVPP fusebit doctor – napraw fusebity, fix fusebits >> Manekinen DIY It is also uploaded in a thread related to locked AVRs Alex ---------- Post added at 19:10 --
If I just make the lock bits to lock the code can anyone else change the lock bits back to 3f and read the code ? This is reason I was disabling the serial programming.. I am confused here, I think I have accidentally wasted my chip, Now is it possible to completely lock the chip by just using lock bits , means no one can r
You can program the fuse bits using usbasp. If by any mistake you programmed wrong fuse bits, there is a chance that you have selected external clock instead of crystal oscillator and internal oscillator. I have faced a similar problem while programming an avr. In such case, you need to provide an external clock (around (...)
You can use this calculator You have currently set your mcu to external clock so you need to connect an external clock source in the XTAL1 pin to reprogram it. You can use another avr set to toggle a pin on/off as a clock or a crystal oscillator or even a 555 should do. - - - Updated - - -[/C
Hello! I was programming my attiny26 device with usbtiny programmer and I obviously accidently messed up clock fuse bits, because I have no experience with avr's yet. I used this site to calculate my fuse bits two bytes. It was as following:
Jtag enabled etc There is no JTAG in ATMEGA8. @Rohi123 Looking at the attachment fuse for internal 8MHz is correct. Do you need bootloader which is selected for 1024 bytes in your attachment.
hey guys im using atmega 168A -pu im beginner with avr i have some basic doubts as to can i use 20mhz crystal and if so ive done the fuse settings can you please tell me if its right spien-programmed(logic 0) brownout programmed to 4.3V BODLEVEL1=programmed(logic 0) BODLEVEL0=programmed(logic 0) BOOTSZ1=programmed(logic 0) BOOTSZ0=
When you start the programmer, there are three tabs, use the third tab for fuse bit settings. If you wish to write those bits, use the check box and then write it. see the attached image. 89255 the value of fuse bits and lock bits can be calculated using the
Yes, your setting is fine, you can check using Note that for crystals >8MHz you should program the CKOPT fuse but for 8MHZ both modes will work
Hi everyone, i try to blink a led to learn avr series as hoby so i wrote this code below: #define OUTPUT 1 #define INPUT 0 #include "main.h" #include #include "util/delay.h" int main(void) { DDRC = 0xFF; // PC0..PC3 as output PORTC = 0x00; // all PORTC output pins Off while(1) {
I have atmega 32 that i connect a button to INT0 I want to know that if I program this chip which fuse bit should I choose and is it an external SUT_CKSEL and which SUT_CKSEL should choose?:?::?: - - - Updated - - - I have atmega 32 that i connect a button to INT0 I want to know that if
Setting the ISP fuse on an AVR can only be done via "High Voltage Parallel Mode". Search on the net for STK-500 or AVRISP schematics. Or maybe the words "AVR High Voltage Parallel Mode" Remember if you FSCK'ed up your internal oscilator settings you have to apply external clock to the AVR. /Bingo
u see fuse bits for it is some information about fuse bits !!! regards
Hello, I have a problem with programming Tiny13. When I disable reset pin (fuse RSTDISBL=0), further programming is not possible. The programmer doesn't detect the device. I use this - high voltage serial programmer. There is a errata in the datasheet about combinations of fuse bits that may lock
Ponyprog will work immediately with any fresh AVR without setting any fuse bits. DON'T play aroud with the fuse bits unless you know what you're doing, otherwise you will never be able again to flash your AVR 100% TRUE You don't need to enable/disable any internal clocks because all AVR's are con
Hai What about watchdog it enabled by default.Or disabled.Or is there any configuration bits like PIC The WDT Initial state of AT90S4414/8515 is disabled at power-up and similar with Safety level 0 of ATMega8515 (fuse bit S8515C programmed "0" and WDTON unprogrammed "1"). If you're using PonyProg typing CTR
try to use ponyprog on it's a popular software. almost new avr device will use internal rc . if you want to use external crystal you must set fuse bit
the problem is tht ur jtage is enabled. You have to do fuse bits to disable it. Some examples of doing fuse bits are available on the book MY EXPERIENCE IN PROGRAMMING AVR MICROCONTROLLERS IN C USING WINAVR You can get the book from
I think it's better to use PonyProg instead of AT-PROG, because AT-PROG is a bit outdated now, and the free version is limited to 1k of program memory. I think I have AT-PROG and programmer schematic on an old CD, so I can post them if I will find them. AT-PROG was my first AVR programmer, but I don't use it anymore, because is size limited (free
AVRs have ISP capability, which means they can be programmed by an easier interface called ISP. But there are Some fuse bits that if you program them then the chip would not be programmed by an ISP programmer any longe such as Reset Pin/Oscillator/Etc. in these situations you will need a parallel programmer to erase the chip back to the defualt fa
Hi guys. I'm using ICC-AVR and i can't set fuses.How to set them? (I want to use crystal but the micro uses the internal 1M OSC) Thanks.
Yes,with JTAG you can do software debugging and programming of micro in both JTAG and in ISP mode. In JTAG mode you can program FLASH and EEPROM and fuse bits ,you can do this also in ISP mode of JTAG ICE.
Is that avr new one and if it is , is it supplied with fuse settings which define internal rc oscillator as clock source ? If so you should need to lower stk500 frequency to reach programming fuses. ISP communication frequency should be less than cpu clock . i dont remember exact numbers - try find it from stk ug.
there's something called lock bits sometime called fuse bits i think that are used to lock the code.. give some details of your project and definitely someone can tell you exactly how to do it.. interestingly, on a sidenote, a hell lot of work is going into how to recover programs that have been protected this way, and people have (...)
What is your code ? Where is you code ? Have you set the fuse bits correctly ?