Uploading Problem with MEGA 2560 and MAC OSX

Development Tools IDE 1.x
1

I've got the new Mega 2560 connected to an iMAC OSX 10.6.8.
The green ON LED is on and the Pin13 LED is flashing on the board :).
I have installed Sketch 1.0 and placed it in the 'Applications' folder after unzipping it.
Arduino Mega 2560 or Mega ADK is the board selected in Tools :).
/dev/tty.usbmodem5d11 is the Serial Port selected.

When I try and upload Blink, I get the following error:
Binary sketch size: 1602 bytes (of a 258048 byte maximum)
avrdude: stk500v2_ReceiveMessage(): timeout

Can anyone help please?

2

Just found this and seems to work (even though still get the red text error):

push and hold the reset button
click the File / Upload
release the reset button

Why doesn't it just program without holding the reset button though?

3

Are you connected through a Hub?

4

You are not the only one with this problem its the new bootloader. It does not reset the board before uploading.

I found 2 hacks, which are both quite nasty ones:
triggering the old bootloader (for the reset), then the new one (for uploading)
connecting the solderpads called RESET_EN (dont do this unless you are completly familiar with the hardware, I am not)

http://arduino.cc/forum/index.php/topic,86518.0.html
http://arduino.cc/forum/index.php/topic,86088.0.html

5

"Are you connected through a Hub?"

  • no, connected directly into the rear of the iMAC

"You are not the only one with this problem its the new bootloader. It does not reset the board before uploading."
Thanks, will try loading a few programs by holding the reset button until a fix is ready :slight_smile: