jump to run addr @ 0x40000

[captain_morgan]

I've made a ton of progress so far. Having got my dev env setup before the module arrive, I'm not compiling and uploading code. The problem I'm currently facing is the issue of the device generally not wanting to boot. 9 out of 10 times I get stuck with this.

jump to run addr.png (15.91 KiB) Viewed 19735 times

If I keep rebooting the device eventually the code runs. Any tips?

[captain_morgan]

Sometimes the garbage out put is different, or nothing is output after 0x40000.
Occasionally I will also see a reboot with cause: 12

[captain_morgan]

This could possible be a power supply issue. I haven't change anything there, but when I have the power running through my multimeter it boots reliably. Idles ~103mA

[rudi ;-)]

This could possible be a power supply issue. I haven't change anything there, but when I have the power running through my multimeter it boots reliably. Idles ~103mA

hi david,
can you use a scope and sets the trigger little under the highest peak value.
then at least post the highest value you get. idles ~103mA this comes from a multimeter?
can this multimeter perhabs catch a "fast current peak" and the 103 mA is the highest peak? thank you!

best wishes
rudi

[captain_morgan]

David?! Whatever...

Yes, the multimeter is indicating consumption of just over 100mA most of the time.
Anyhow.. this isn't my biggest issue at the moment.

[johnlee]

103mA doesn't seem the kind of number that we are expecting during boot. we need to check on this...

[Baoshi]

Hi,

Below are the current measurements, taking using eevblog uCurrent, 1mV = 1mA

Bootup, some spikes goes as high as 700mA, afterwards stable at 100mA

Bootup

DS1ED141303193_0.png (6.82 KiB) Viewed 19641 times

Idle (SoftAP, no client connected)

Idle

DS1ED141303193_1.png (6.01 KiB) Viewed 19641 times

Zoomin of the spikes in Idle state

Zoomin of Idle

DS1ED141303193_3.png (6.39 KiB) Viewed 19641 times

I feel these are on the high side. My simple 5V-3.3V stepdown using 1117-3.3 does not give stable result.

[Baoshi]

Seems the forum does not allow me to upload more than 3 attachments.
This is the current measurement during busy state

Busy state

DS1ED141303193_2.png (6.83 KiB) Viewed 19641 times

[rudi ;-)]

txs baoshi

can confirm this.

have not test byself with rigol just in time, but the usb ( 500 mA ) is sometimes short time overloaded and break down.

Test with a USB TTL adapter and simultaneous power supply of this was mostly satisfactory. therefore I have made over a USB TTL Adpater the power supply and the UART.

However, sometimes overloaded and breaks every now and then the com driver off therefore.

so then I went back to the Back Route stable power supply.

thanks

best wishes
rudi

[rudi ;-)]

reported well and the same:

http://esp32.com/viewtopic.php?f=14&t=74#p283