This may be a dumb question so sorry in adavnce.
I programed an attiny45 with the blink code just to practice as it was my 1st time doing it. Well it worked just fine. Now when i tried to program my final code on that same chip it errors out but i could upload the final code to a new attiny45. So my question is are attiny45 chips a 1 time use or is there a way to delete the old code and replace it with a new code?
Thanks
Now when i tried to program my final code on that same chip it errors out
Do you suppose that the errors might provide some clues?
Yeah sorry, ill try to load it again and post the errors. Mainly was just wondering if they were a 1 time use chip.
ok here are the error codes
Arduino: 1.6.7 (Windows Vista), Board: "ATtiny, ATtiny45, 8 MHz (internal)"
Build options changed, rebuilding all
Sketch uses 934 bytes (22%) of program storage space. Maximum is 4,096 bytes.
Global variables use 15 bytes of dynamic memory.
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x03
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x03
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0x03
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0x03
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0x03
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0x03
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0x03
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0x03
avrdude: stk500_recv(): programmer is not responding
Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.
avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0x03
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x03
This report would have more information with
"Show verbose output during compilation"
enabled in File > Preferences.
Mainly was just wondering if they were a 1 time use chip.
No, they are re-programmable.
Sounds like you've either damaged this one or set the fuses so that it can't be re-programmed.
PaulS:
No, they are re-programmable.Sounds like you've either damaged this one or set the fuses so that it can't be re-programmed.
ok thankyou, they are cheap enough and was a good practice still so not a big deal.
thankyou for your time
PaulS:
Sounds like you've either damaged this one or set the fuses so that it can't be re-programmed.
Naw. The problem is the programmer.
kau_cinta_ku:
This may be a dumb question so sorry in adavnce.I programed an attiny45 with the blink code just to practice as it was my 1st time doing it. Well it worked just fine. Now when i tried to program my final code on that same chip it errors out but i could upload the final code to a new attiny45. So my question is are attiny45 chips a 1 time use or is there a way to delete the old code and replace it with a new code?
Thanks
My guess is that you programmed a brand new ATTiny45 which comes from Atmel with the internal oscillator enabled (hence the FIRST program cycle worked).
Then when you programmed it, you programmed a fuse incorrectly to use an EXTERNAL oscillator or crystal (I made the same exact mistake with an ATTiny85).
IF your pins #2 and #3 are free, connect a crystal across them (4 mHz, 8 mHz... doesn't matter) - just hold the crystal against the pins and see if you now can program it.
If it works, then that was your problem. The factory default for the fuses are:
HIGH FUSE: 0xDF
LOW FUSE: 0x62 <-- this one controls the oscillator
EXT FUSE: 0xFF
Another option is to use a high voltage programmer (like the one from MightyOhm), but you SHOULD be able to save yourself by temporarily connecting a crystal to pins #2 and #3.
Good luck.
Bad fuses produces different error - the programmer gets as far as trying to read the sig, and thinks it got a signature of 000000. And besides, he says it's running blink, and he didn't mention burn bootloader but just uploading sketch.
I'm with coding badly, it's a programmer problem I think. What programmer are you using?