Dumb question as I am a noob at this Arduino stuff. How do you clear the memory of the UNO? If I have a sketch loaded into memory and have to modify the sketch, do I need to clear the memory before uploading the new sketch? I have my UNO tied up on a big sheet of plywood with a power supply and stepper driver and motor etc and need to experiment with the stepper driver code as my motor buzzes and vibrates at very low rpm. The device will run at 0.5 to 10 rpm using a NEMA 23 motor with a M542T stepper driver and it runs smooth at 4-10 rpms but the slower stuff just doesn't seem right. It makes a slight click almost like a bad bearing but it does many of these in a revolution so I know it is not a bearing. Anyhow, I have other questions that need to have their own thread.
Thanks
When you upload a new sketch, the old one is gone; so no need to clear.
If you reset the Arduino, the ram is cleared; so no need to do that either.
sterretje:
When you upload a new sketch, the old one is gone; so no need to clear.If you reset the Arduino, the ram is cleared; so no need to do that either.
That's great! I thought that might be the case but wasn't sure so I had to ask.
Thanks
If you reset the Arduino, the ram is cleared; so no need to do that either.
What's about the contents of the IO Registers? Are they also get cleared (all bit locations assume LL states)
following the hardware RESET of the Arduino UNO?
GolamMostafa:
What's about the contents of the IO Registers? Are they also get cleared (all bit locations assume LL states)
following the hardware RESET of the Arduino UNO?
Why don't you read the datasheet of the 328p?
Hello,
"If you reset the Arduino, the ram is cleared" I'm not sure, During the setup, I displayed memory contents between 0x0100 and 0x0900 and the ram is not cleadred.
Does it matter if RAM is cleared by a hardware reset ? After all, you won't normally be reading from it unless you have saved something and even then you will presumably be using a variable and don't know or care where the value is saved