Arduino IDE uploading wrong sketch

Development Tools IDE 1.x
1

Hi Guys,

I've been programming an ATTiny85 chip for the past couple of days using my Arduino as the ISP however tonight, for whatever reason, every time I hit the upload button, the IDE says it's compiling / uploading, but when I test the chip, it keeps running an old version of my code, not the new updated code I told it to upload.

I've re run the ArduinoISP sketch to make sure the Arduino isn't at fault, and have also tried uploading the program to a fresh chip and that displayed the same issue. I uploaded a different sketch on a different machine and that one did upload so I can only gather that by Arduino IDE instance is doing something weird.

Has anyone seen this issue before? and any ideas on how I can fix it? I've been trying different things for the last 1.5 hours now but it's just not playing ball.

Many thanks

Matt

2

Are you sure it's actually loading?
If you select File:Preferences, turn on verbose outputs, and then expand the bottom of the IDE, is it showing as actually completing? Or are there errors, and you just happen to see "avrdude Done" or whatever it shows with verbose turned off?

3

Hi CrossRoads,

Thanks for the suggestion. It turns out though, I was being forgetful (I blame the late night coding). My project involves an 8x8 matrix and it's this that was constantly displaying my old code. The issue was, I had missed out the command which actually tells my screen to render so while I was telling it to do stuff, it wasn't updating because I never told it to (doh!)

Thanks for taking the time to help though.

Matt