Hangs on first calibration screen --processing--

[ShaviTF]

The whole procedure has apparently gone well, but when I start the device for the first time, it asks me to place the probe to ground, then to put it in DC mode and when I click ok it indicates --processing-- and it hangs... Any suggestion?

[mean00]

Hi
You have done the hard part
That problem is usually the sign of a problem when saving stuff to the flash
1- What is the complete reference of the MCU ? Would it be a CH32F103 by any chance ?
2- Which binary did you use / how did you build it if you built it from source ?

[ShaviTF]

Hello... first of all, thank you for the work you are doing and for taking the trouble to help us...

1.  About the MCU is the STM32F103C8T6. I have been researching and I have seen that this one comes with 64 and with 128K. I am using STM's "Flash loader Demonstrator" to program it, and when I plug it in it saids me that it's the 128k version . 

2. I have tried the FNIRSI binary (without bootloader) flashing to 64k (in this case it boots but the ok button doesn't work) and the JYTECH binary (with bootloader) flashing to 128k... (The application doesn't give me any errors and after writing it verifies correctly, which makes me assume that it's really the MCU is 128k), but in this case it is where the calibration hangs.
 
I have not tried to compile the software myself, basically because I have never done it, but I will try to investigate how to do it

[mean00]

1- Ok, assuming it's a guenuine STMF103CxT6 it should have 128 kB (but claiming it has only 64 kB)
The "Flash loader Demonstrator" is using serial or swd ? There was report that if it using serial, you should make sure the watchdog is disabled and try to flash it twice, it may help (dont ask why)

2- Ok that behaviour shows it is not a CH32 style motherboard

If you can, try flashing the code using a stlinkv2 + openOCD or something similar, it should work

[ShaviTF]

I am using UART, I don't have SWD programmer. I have tried programming several times and there is no difference. I've also tried disabling WatchDog (WDG_SW) with the "Flash Loader Demonstrator", but doing so only gives me a blank screen at boot. It's weird... I can get into DFU, and everything seems ok until it gets to calibration... then it hangs with the message "-processing-"

[mean00]

Could you try the attached binary ?
It skips calibration check, so you'll have garbage on screen but to check everything else works
[](url
lnDSO_nocal.zip

[mean00]

If it fails at the first calibration step (i.e. AC or DC) and not a the end, it's not the flash
but rather the ADC
If the test binary works for you, you can try manually doing a calibration
Long press the rotary encoder to enter menu
then
Calibration -> wipe calibration
reboot
Calibration -> Basic calibrate

[ShaviTF]

Ok... now finaly i could got into the application, but, although it does record data, the graph is not shown, that is, I can enter the menus and if I change the "Test signal" menu values (amplitude and frequency), these are reflected in the values detected by de probe in the left column, but the graph is not displayed on the main screen.

About calibration still not working. That is, I can do the "wipe calibration", but after reboot, when I hit basic calibration, it hangs at the same point as before (although now it doesn't show the sentence -processing-)

[mean00]

Ok so in "normal" mode the ADC is working
The display is gibberish because without calibration the values are out of scale
Can you get the serial output when you do calibration ?
(115200 / 8 bits/ no hw flow control / no parity)

[ShaviTF]

Ok...

The only read i get is:
Adc : Asked for fq=1000 got fq=1000
intDiv:1 int Frac=6464

And then it hangs immediately

[mean00]

If you are willing to help me, i can try to find out what's going wrong by providing test firmwares, will probably take a few steps

[ShaviTF]

No problem. For sure i will help you... in the real you are helping me :D

[mean00]

Does this work ?, it will go to calibration at start
(Trying to pindown the issue)
nocal_mark2.zip

[ShaviTF]

Now as you say goes to calibration at start, but hangs at "-processing-" again.

Terminal output is similar:
Adc : Asked for fq=1000 got fq=1000
intDiv:1 intFrac=6464
Setting new GainRange=0

[mean00]

Next : This is the expected output
Setting new GainRange=0
Starting ADC...
Ending ADC...
Range : 0 val=2062

My guess is you will only have Starting ADC...
cal3.zip

[ShaviTF]

New output:
Adc : Asked for fq=1000 got fq=1000
intDiv:1 intFrac=6464
Setting new GainRange=0
Starting ADC...

keeps hanging on -processing-