LEDs are not blinking during firmware downloading?

Forum 2005-2010 (read only) Hardware Interfacing
1

Hi Folks,

I'm using arduino board to write some firmware. When I tried to download my code from arduino environment, the LEDs on FTDI chip (GPIO0&1) were not blinking. Is anything wrong with my hardware or could it be the driver issue?

Thanks for any comments!

-hhpp

2

Are there any errors when you compile?

3

I'm using arduino board to write some firmware. When I tried to download my code from arduino environment, the LEDs on FTDI chip (GPIO0&1) were not blinking. Is anything wrong with my hardware or could it be the driver issue?

Well an important question is does the code successfully upload to the board? If not what error codes are you getting in the Arduino IDE after attempting the upload? Does the PC recognize the Arduino connection when you first plug it into the PC?

Lefty

4

No, the code is ok. The same code I can download before, but all of sudden the leds stopped blinking.

5

I think the code was downloaded ok even without LED blinking, because the Arduino said "Done uploading".

The only concern is why the LED stopped blinking, is this indicating some hardware failure?

6

Which board model do you have? Not all have serial data leds driven from the FTDI chip.

Lefty

7

It's Arduino Mega. I checked in the schematic and the LEDs are connected on GPIO0 and GPIO1.

Sorry I confused you, my LEDs were working fine before. It just stop blinking suddenly. I was trying to troubleshoot what might cause it to stop blinking.

During download process, is it the driver to blink the LED?

Thanks,
-hhpp

8

During download process, is it the driver to blink the LED?

Not sure if it's a driver controlled thing or not, it's just two serial data output pins on the FTDI pin, however I really don't know that for sure, the driver might have something to do with it. That is not a problem I have ever seen posted before.

Lefty