No communication after erase button pressed

Spodeopieter

Can you assist me with a jtag reflash ?

Spodeopieter

Reliable shipping to USA and back would cost me quite a bit of money. Buying a new one would be a better bet for me.

I would really like to give the JTAG reflash a go.

What programmer do you use for flashing over JTAG ? and can you provide me with a wiring diagram ? Also , what binary should I flash ?

dc42

We have never flashed a board using JTAG, we flash using USB.

The symptoms you report are odd and it sounds to me more like a wiring or driver issue, except that you have tried multiple PCs. Have you measured the voltage on the +3.3V rail? Is any of the chips or the WiFi module on the Duet getting hot?

Spodeopieter

@dc42 said in No communication after erase button pressed:

cept that you have tried multiple PCs. Have you measured the voltage on the +3.3V rail? Is any of the chips or the WiFi module on the Duet getting hot?

3.3 v rail seems good , the SAM chip is getting a little hot , around 40 degrees , the esp is ice cold.

Just another thing I noticed , if I press the erase or reset button , nothing happens , no flashing of any LED's

dc42

@spodeopieter said in No communication after erase button pressed:

3.3 v rail seems good , the SAM chip is getting a little hot , around 40 degrees , the esp is ice cold.

Just another thing I noticed , if I press the erase or reset button , nothing happens , no flashing of any LED's

The SAM shouldn't get hot if it's just waiting to be flashed. Perhaps it is faulty.

Once the chip is erased and waiting to be bootloaded, I wouldn't expect the Erase or Reset buttons to flash any LEDs.

It's possible in theory to program the processor via the PanelDue port (and for the same reason, having a PanelDue connected might interfere with programming over USB, although in practice it doesn't seem to). You would need Bossa or SAM-BA and a serial-to-UART converter with 3.3V signal levels.