Question about ATMEGA 328 behavior

Development Tools IDE 1.x
1

I have an Atmega-328 that was supposed to come with the Duemilanove boot loader on it. I suspect I may have either corrupted or erased the bootloader. Currently on power on or reset I get 3 quick blinks from Pin 13. Is this behavior what is expected of the 328 with the bootlader but no sketch or is it the behavior of a 328 with no bootloader?

Thanks,
Josh

2

Depends on the bootloaded. Some do that, some do a slow blink that progresses to a fast blink.
Where'd you get the chip from?

3

I got the chip from Jameco a few months ago. I fear I may have wiped the boot loader. I get the message below when I try to upload a sketch. when I put my scope on Pin2 (RX) I see the Arduino IDE sending out some data. However when I put my scope on Pin 3 (TX) I don not see any response. I am manually pushing reset when I upload the sketch this has worked on other 328's I have used but could this be an issue as well?

Below is the output of the IDE after it fails.

Binary sketch size: 1010 bytes (of a 30720 byte maximum)
avrdude: stk500_getsync(): not in sync: resp=0x00
avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51
4

I am manually pushing reset when I upload the sketch this has worked on other 328's I have used but could this be an issue as well?

Timing on using a manual reset button while uploading is a tricky thing. I get best results by pressing and holding reset down, then hit upload and only when you see the compiler state the size of the compiled program dislayed on the IDE do you lift the reset button.

The error you are getting is just saying the IDE can't communicate with the board. To test out your serial wiring perform the 'loop back test'.

Lefty

5

Loop back tests is good. I was mistaken when I said I get the triple blink on power up. I don't I only get the tripple blink after pressing reset. Pin 13 doesn't do anything else until I hit reset again.

6

Must be a problem with the ATMega 328 boot loader. I pulled it and put in an ATMEGA 8 which I actually didn't think had a boot loader on it but apparently did and to my surprise was able to upload a sketch with no problem. So my homemade board is working fine. I'll wire the 328 up and try to burn the boot loader.