Re: [avr-chat] avrdude: error: programm enable: target doesn't answer.

[Martin Stejskal]

Glad to hear that AVR is alive again. By the way I use same embedded calculator, it never let me down :)

2014-04-25 19:01 GMT+02:00 YuGiOhJCJ Mailing-List <address@hidden>:

On Fri, 25 Apr 2014 15:16:23 +0200
Martin Stejskal <address@hidden> wrote:

>  I know I just repeat Ormund answer, but.... do You have connected 8 MHz
> crystal (or any from 8 to 20 MHz) to your attiny2313 (pin 4 and pin 5)?
> Reason why AVR stop responding to avrdude is, that fuses changed clock
> source to external crystal. Until You not connect crystal, AVR will not
> have clock source, so it can not run!  Meanwhile in default factory
> settings is used internal clock source (so AVR have clock without need any
> external components). So connect crystal to pin 4 and pin 5 and then
> connect programming signals. Then AVR should respond. Rule of thumb: do not
> change fuses until you really know what are you doing. At least look at
> some fuse calc.
>
>
> 2014-04-25 14:38 GMT+02:00 YuGiOhJCJ Mailing-List <
> address@hidden>:
>
> > On Thu, 24 Apr 2014 23:26:06 -0400
> > Ormund Williams <address@hidden> wrote:
> >
> > > On Fri, 2014-04-25 at 02:45 +0200, YuGiOhJCJ Mailing-List wrote:
> > > > avrdude: error: programm enable: target doesn't answer. 1
> > > ...snip...
> > > > I was able to do it just before I typed this:
> > > > $ sudo avrdude -p t2313 -c usbasp -U hfuse:w:0xdb:m -U lfuse:w:0xef:m
> > > >
> > > Are the fuse settings what you intended? an lfuse of 0xef means that you
> > > have a high frequency crystal attached, do you?
> > >
> >
> > In fact, it is the first time I change the fuse settings on a
> > micro-controller.
> > My objective was to build an USBtinyISP programmer (it uses an attiny2313
> > micro-controller).
> > I read that I have to do two things :
> > - send the firmware to the flash memory of my attiny2313
> > - change its fuse settings to have a high frequency
> >
> > Also, in the Makefile I found in the USBtinyISP firmware archive, I can
> > read:
> > $ cat usbtinyisp/spi/Makefile | grep avrdude
> > FLASH_CMD       = avrdude -c avrisp -pt2313 -U flash:w:main.hex
> > FUSE_CMD        = avrdude -c avrisp -pt2313 -U hfuse:w:0xdb:m -U
> > lfuse:w:0xef:m
> >
> > So that is why I have used these settings.
> > But now, I am unable to use avrdude again to send a program to my
> > attiny2313 flash memory.
> > Is there a way to come back to the previous state where my attiny2313 was
> > perfectly working ?
> >

Thank you Martin you found.
Indeed, it was necessary to connect crystal to pin 4 and pin 5.
In fact, I have not used exactly a crystal but a ceramic resonator (ZTA 12.00MT).
Anyway, now it works:

---
$ sudo avrdude -p t2313 -c usbasp -U flash:w:main.hex

avrdude: warning: cannot set sck period. please check for usbasp firmware update.
avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.00s

avrdude: Device signature = 0x1e910a
avrdude: NOTE: FLASH memory has been specified, an erase cycle will be performed
         To disable this feature, specify the -D option.
avrdude: erasing chip
avrdude: warning: cannot set sck period. please check for usbasp firmware update.
avrdude: reading input file "main.hex"
avrdude: input file main.hex auto detected as Intel Hex
avrdude: writing flash (2038 bytes):

Writing | ################################################## | 100% 1.08s

avrdude: 2038 bytes of flash written
avrdude: verifying flash memory against main.hex:
avrdude: load data flash data from input file main.hex:
avrdude: input file main.hex auto detected as Intel Hex
avrdude: input file main.hex contains 2038 bytes
avrdude: reading on-chip flash data:

Reading | ################################################## | 100% 0.64s

avrdude: verifying ...
avrdude: 2038 bytes of flash verified

avrdude: safemode: Fuses OK

avrdude done.  Thank you.

---

After that, as I want to be able to set the default attiny2313 fuse settings, I have typed this:
$ sudo avrdude -p t2313 -c usbasp -U lfuse:w:0x64:m -U hfuse:w:0xdf:m -U efuse:w:0xff:m

Thanks to the calculator [1] that gave me the default values.

Now, my attiny2313 works fine like before.
It does not need anymore to put a ceramic resonator between pins 4 and 5.

Problem solved.

[1] http://www.engbedded.com/fusecalc

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