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84 Threads found on edaboard.com: Fuse Bits
Hello everybody. I am building a dmx usb device, for controlling stage lightning with a laptop. I designed my own version of pcb for this device. There is a hex file for microcontroller on website, but I don't know which fuses must be burned on atmega. Now I am wondering, is i
First things first - are you sure that the timer is running? Try executing your start routine code, sit in a simple for() loop for a while, and then stop and read the timer register value. If it isn't running, you haven't configured it properly - perhaps the clock source for it must be configured? Have you set the clock fuse bits appropriately
Hello, I am using USBasp to program my board with ATmega128, hardware is single side PCB by Thomas Fischl board was working well and I decided to change some parts of the code but when I tried to read chip signature I got error (attachment) as well as when I tried to read
Did´t you see any configuration bits on datasheet for doing that ? In general the fuse is designated with a sugestive acronym.
The problem seems to be with fuse bits, Try LOW EF Hex HIGH C9 Hex Just try and you can revert to original values if needed. For further details you can refer online fuse bit calculator for AVR microcontrollers.
Disable the jtag fuse on the M32. Jtag uses pins on PortC /Bingo
Hi, I design new USBasp programmer to easy and safety use. Why my USBasp easy to use ? - You just insert all chip from pin 1 on ZIF socket. programmer detected chip without any jumper or switch setting! - You set CKSEL and CKDIV8 fuse bits to every options you want. Don't Worry! USBasp programmer generate clock on ZIF socket and ISP connector f
you first get some understanding check these links Intro to Bootloaders for
Whats wrong to Atmega8 after setting its fuse bits as High=D9/Low=E1 Asn per the below code, i just identifying that which switch is pressed by ON particular LED. Atmega8 does this task perfectly if i set its fuse bits as defaults, but after setting fuse bits as High=D9/Low=EF, the i/p (...)
I presume, "extreme AVR burner" is a simple serial programmer. You can't set SPIEN bit to 1 (disabling serial programming mode) with a serial programmer, in so far High fuse EF won't be set. But it's easy to set a wrong clock option that requires an external clock source to XTAL1 for furher programmer access, as indicated in the datasheet. Yo
The problem that I see using the software watchdog is in the case of failure occurrence on the code so that stops the timer operation. Most microcontrolers have watchdog enable configured at the fuse bits, turning difficult to disable it during normal operation.
For my purpose I need to report to Hyperterminal what is the value of the frequency generated by the external Oscillator attached to my microcontroller.The main reason being reporting proper health of the oscillator and to calculate the frequency in runtime in the software..I initially thought reading the fuse bits and calculting thr frequency ran
Hi all, I am using ATMEGA64. It's the first time I used it, so the fuse bits I programed to it was wrong. Now, the JTAG interface is disabled. Please help me to fix this problem. Thanks a lot!
Dear Friends HAPPY NEW YEAR TO All I am doing this Project But My problem is not Finding the ATMEGA8 configuration (fuse bits) Please help me what is the fuse bits of Atmega8
SALAM TO AAL i m using USBASP programmer with KAHZAMA AVR programmer.. i have used tiny85 and tiny 45but when i burn the contoller after 2-4 writes it does not write any more same problem again facing with tiny45 and chip also not erased any thing wrong with fuse bits??? :cry:
A trivial compiler usage problem. Each compiler has specific symbols for fuse bits and include files that must be imported to make it known. Apparently you didn't get it right. I presume it's well explained in a compiler user manual and demonstrated in example projects. You didn't tell which compiler was used.
lower fuse = 0xFF higher fuse = 0xC9 A simple google u would have got lots of help
You say, your 16F887 is presently working with 2.5 V supply and should be used at 5V in the new design. There's no configuration fuse that must be changed in this case, unless you plan other modifications that haven't been reported yet. A confusing point in your post is the said 10 MHz crystal, because 2.5 V operation is specified for 8 MHz
Hello friends, I'm want to operate atmega8L from external crystal of 8MHz and I'm planning to change its fuse bits as follow High fuse = 0XD9 Low fuse = 0XFF i just wanted to know that is it correct or not? Since i dont want to lock any more chip now
The bits of fuse is same in the datasheet!!! If you not use the fuses, the mcu works wrong or not run!!! To see the all fuses available for the pic, search into folder (?:\Program Files (x86)\HI-TECH Software\PICC\X.XX\include\) the file pic16f877a.h... In this file have all about of the target pic. // // Configur
If its a problem for only one particular device, verify that the device is not locked with wrong fuse bits in the last event. Try using a brand new device instead. OR cross check for wrong connections to the respective pins from programmer to the device. See that the device is powered with 5 volts. Cheers
check ur fuse bits....
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
i have had a bitter experience while setting fuse bits. I had to throw away one... Not really
You can find your required information under the "System Clock and Clock Options" section in the datasheet. Here's a table from table shows the required fuse bits settings for CLKSEL3..0 that set the oscillator settings. So, you have to select between 0100 and 0001 f
Please let me know that how to set fuse bits in the ponyprog2000 for ATmega8 using serial programming. Can anyone interested to tell me?
Any way for me it is not so easy..;)... Also my package is very small (32-QFN). I know it is not due to AVR architecture problem. I just commented it is a bad design by the Atmel. Otherwise they can easily implement a fuse bit reset to default option by some simple way in the hardware itself so that no need to take the
You need to have working hex code, properly set fuse bits, tested hardware to test your code. Can you read back your code from chip to verify?
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=
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. (...)
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.
I don't see anything wrong with your fuse settings, they are set to internal RC 4MHz. Try to use which is a front end for avrdude. Use the settings to set the programmer to usbtiny and try to read the fuse to see if you have connection. If you can connect program the chip w
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
This fuse calculator can help you set the clock source correctly PORTB and PORTD can be set directly in your code but in PORTC bits 2,3,4,5 are set as JTAG by default so to use them as I/O you have to disable the JTAGEN fuse Alex
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 (...)
It may be initialization problem due to some timing issue or may be due to improper fuse bits... Any way, I think you need to post your code here. Also what about the fuse bits?
You can change the fuse bits before of after programming the flash it doesn't matter. Until you set the hardware clock to the same frequency as the frequency that was set in the compiler when the code was compiled everything will be executed faster or slower depending on the relation of the real and configured clock. After programing the (...)
Enter config bits, or, as they used to be called, config fuses. Back in the days when microcontrollers were program-once devices, you really did blow a fuse in order to program them. Today, most micros have flash memory that can be programmed tens of thousands of times, but there are still one-time-programmable (OTP) devices about. In (...)
for your oscillator setting see above link try this solution also.
From the other thread, I've read that you used the 16F877A. Maybe you're referring to the configuration bits of the PIC. Here you can read about the fuse bits of the AVR microcontroller:
Are you sure your PIC burner is taking fuse bits from the hex file? Did you noticed the fuse bits loaded in the programmer? Any way, just try by grounding the RB3 pin using a 10K resistor and use my code above (modified now). Also don't forget to pull up the MCLR pin also... Still if it is printing continuous U, then it (...)
How do i program the fuse bits of atmega 128 for external crystal operation ? what values should i put for low and high fuse bits? how should i avoid locking of chip?
Hi friends can anyone teach me how to burn fuse bits in a Atmega8.first i burnt the lower and higher fuses separately.then my AVR became the second time i burnt both the fuses together.then error was shown.i dont know what to do?
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
AVR-GCC I am using avr and avr-gcc for first time. Is it possible to include the fuse bits in the C code ? If so, how ?
65492 These setting for atmega8 are not working. I want to use internal oscillator. Thanks
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
Yes it is a nice front end to avrdude, I find it very convenient. It just doesn't have security fuses so if want to change them you have to use a different way like command line of avrdude or a different program like ponyprog or even AVR studio (ISP or JTAG) if your programmer is supported. Alex
Dear All, please help me I am getting error of "programmer can not be found". I am using usbasp for 89S52 with fuse & lock bits EF for low & c9 for hi. before some time i got error of "no chip enable". Voltage level of usb programmer is near about 5 V & 89S52`s 4 to 4.5V First of all answer these questions.
You have to set the bits LB2 and LB1. Setting LB1 to 1 and LB2 to 1 disables all lock features. Setting LB1 to 0 and LB2 to 1 - Further programming of the Flash and EEPROM is disabled in Parallel and Serial Programming mode. The fuse bits are locked in both Serial and Parallel Programming mode. Setting LB2 to 0 and LB1 to 0 - Further (...)