Setup software via FTDI on Leonardo

Development Tools IDE 1.x
1

Hi everyone, I hope this is in the right group.

I think I fried my Arduino (Leonardo), to test I would like to try upload software via FTDI cable.
is this possible? if so, how do I make the circuit to connect FTDI cable to the Arduino Leonardo?

thanks,
J

2

a little history, in case anyone wants to know.

the board was programmed several times via USB and was working. Not sure what happened to it, but now when I plug it into the computer, there is no sound or device in "Device Manager". other usb devices work, so it's not the pc.

Thanks,
J

3

I had the same problem with my Arduino Yun (which use the same MCU as a Leonardo)
I solved it by burning the bootloader, using the ISCP header and a Arduino as ISP programmer

4

Thanks, do you have any links with instructions I can follow, I'm battling to find it in google.

thanks,
J

5

I have a working Mini Pro, is it possible to burn the bootloader to the leonardo with this?
J

6

Nick Gammon has a very good how to, about burning bootloader with different boards

A pro Mini and FTDI cable should be OK

Note: This worked for me because a misssing bootloader was the problem
Your problems could be very different.

7

Hi, thanks for the links. I think my problem is different.

I managed to setup the mini as Arduino ISP, but it didn't load the boot-loader and the behavior of the Leonardo is the same.

When I turn the Leonardo on the (via USB or Arduino ISP or external power via DC jack), the LED's ON and TX turn on.
If I press reset button, there is no change, the LED's stay on (ON and TX), no blinking is seen.

If I hard wire ground to reset, the same happens as pressing reset, no change in LED's.

One more thing to note, if I plug in the USB, usually windows make a noise when picking up the usb. it doesn't make that noise. also there is no device in "Device Manager". it is as if the USB controller is not recognized.

I've checked the USB ports on the computer and they work.

Any ideas?

8

tried loop back test... Loop-Back Test Instructions - IDE 1.x - Arduino Forum
still no sound from windows (sound is on) and device not picked up :frowning:

TX and ON LED's light up.

9

Hi everyone, any ideas what could be wrong with my Leonardo?

10

I just noticed the chip with 8 legs (4 each side) gets very hot, is this the usb controller?

11

Hi again,

I've managed to find out what the component is which gets very very hot: LMV358IDGKR
and based on this: http://www.ti.com/lit/ds/slos263u/slos263u.pdf
it is an amplifier of some sort.

anyone got anymore info on this and why it might get so hot?

thanks,
J