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jump to run addr @ 0x40000
Posted: Thu Dec 24, 2015 10:09 pm
by 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 17698 times
If I keep rebooting the device eventually the code runs. Any tips?
Re: jump to run addr @ 0x40000
Posted: Fri Dec 25, 2015 1:33 am
by 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
Re: jump to run addr @ 0x40000
Posted: Fri Dec 25, 2015 3:51 am
by 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
Re: jump to run addr @ 0x40000
Posted: Fri Dec 25, 2015 1:07 pm
by rudi ;-)
captain_morgan wrote: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
Re: jump to run addr @ 0x40000
Posted: Fri Dec 25, 2015 7:20 pm
by 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.
Re: jump to run addr @ 0x40000
Posted: Sat Dec 26, 2015 10:06 am
by johnlee
103mA doesn't seem the kind of number that we are expecting during boot. we need to check on this...
Re: jump to run addr @ 0x40000
Posted: Sat Dec 26, 2015 3:18 pm
by 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 17604 times
Idle (SoftAP, no client connected)
- Idle
- DS1ED141303193_1.png (6.01 KiB) Viewed 17604 times
Zoomin of the spikes in Idle state
- Zoomin of Idle
- DS1ED141303193_3.png (6.39 KiB) Viewed 17604 times
I feel these are on the high side. My simple 5V-3.3V stepdown using 1117-3.3 does not give stable result.
Re: jump to run addr @ 0x40000
Posted: Sat Dec 26, 2015 3:19 pm
by 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 17604 times
Re: jump to run addr @ 0x40000
Posted: Sat Dec 26, 2015 3:31 pm
by 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
Re: jump to run addr @ 0x40000
Posted: Sat Dec 26, 2015 4:39 pm
by rudi ;-)