FNIRSI-1013D "100MHz" tablet oscilloscope

[sub77]

Hi

Thank you for your work and development of this project.
 Unfortunately, when I installing rtc, I broke the capacitor.
Please, if there is information about its characteristics (capacity) for its replacement, I will be grateful. Thanks in advance

[Russell2024UK]

Hi Sub77 oh wow its so easy to break small SMD items .. I have taken mine 1013D apart which i fitted the RTC - (Its all ways best to remove the item then measure with test equipment however to risky so did not this time  ) Removed one wire measured in circuit as per pictures .. Measured across the white capacitor Hope it helps 

[pcprogrammer]

Hi

Thank you for your work and development of this project.
 Unfortunately, when I installing rtc, I broke the capacitor.
Please, if there is information about its characteristics (capacity) for its replacement, I will be grateful. Thanks in advance

It might just work without the capacitor. Normally one would not even add a capacitor between I2C SCL and SDA, but they did it to overcome some problems they have with the bit banged I2C.

Try it without and if it works with the original firmware, don't bother putting another one in. If it does not try it with the 2.2nF Russell2024UK measured.

[Sleo]

Removed one wire measured in circuit as per pictures .. Measured across the white capacitor Hope it helps 

No, no, it's not correct to measure soldered capacitors. This capacitor is made of white ceramic NP0; its capacitance should be relatively small, no more than 1000 pF. To measure it, you need to unsolder it.
I did it, the capacitance is 20 pF, dielectric NP0, size 0603, voltage is not important (usually 50 V). Measured with Mastech MS5308.

[Sleo]

Has anyone used a 4GB card? I tried to check what types of file systems the oscilloscope works with, but the alternative firmware does not start at all with a 4GB card, no matter FAT16 or FAT32. FNIRSI firmware works fine with this card - saves pictures and waves. Perhaps the problem is in the speed of the card, it is quite old. The card has been checked for bad sectors etc., everything is fine.

[pcprogrammer]

Has anyone used a 4GB card? I tried to understand what types of file systems the oscilloscope works with, but the alternative firmware does not start at all with a 4GB card, no matter FAT16 or FAT32. FNIRSI firmware works fine with this card - saves pictures and waves. Perhaps the problem is in the speed of the card, it is quite old. The card has been checked for bad sectors etc., everything is fine.

The speed thing most likely is the issue here. I have tried it also with a 4GB card that I have. Works with a card reader on the PC, the original firmware but not with the new firmware. The same happens on the 1014D. See here https://www.eevblog.com/forum/projects/reverse-engineering-the-fnirsi-1014d/msg5508868/#msg5508868

A couple of days back I used that same SD card in a Milk-V Duo board and the startup took about two and a half minute. With another 32GB card it started in about 10 seconds.

The problem with the new firmware probably has to do with it not recognizing the speed information of the card properly. It just switches over to high speed mode and then the card fails. Have not looked into it any further.

Edit: The firmware only works with a FAT based file system. It is based on open source code found here http://elm-chan.org/fsw/ff/

[Sleo]

Edit: The firmware only works with a FAT based file system. It is based on open source code found here http://elm-chan.org/fsw/ff/

I know. Just trying to replicate Russell2024UK's situation with a card that my loader detects as FAT16-LBA.

[Russell2024UK]

Has anyone tested the new firmware V0.025j ? I have noted a few issues with the new firmware V0.025j for the 1013D oscilloscope. Based on my checks. Before checking NOTE : I have set up the set process as per video (FNIRSI 1013D calibration procedure). 300 mv to 15 volts & tried the DC shift with a 2.5 volt offset & 10k square wave frequency, Amplitude @ 5 volts with test generator. ( as per video FNIRSI 1013D dc shift calibration vol 1). Told to look at three items.

1. **DC Shift Issue**: It seems like the DC shift feature is not functioning as expected.  The DC shift with increments of Plus & Minus ±1V, are not moving as they should - I am unable to zero the auto set line with the autoset button like you could with the previous firmware version (V0.025H). As per video FNIRSI 1013D dc shift calibration vol 1.

2. **Single Mode Switch & Sample Frequency**: seems to be working as intended only checked briefly.

3. **Diagnostic Screen Change Button**: The new red and green boxes in the diagnostic screen are also functioning as expected, which is a positive sign for the UI improvements. I Would be interested in anyone else's opinions regarding new firmware V0.025j test results ? Thanks again  for all your hard work with this project....

[Atlan]

The 0.025j version is probably not 0.025j I hope it is in the trash, otherwise it will be a problem.

[Russell2024UK]

Atlan Oh mine downloaded was from your comment as per my picture .. Little confused Your post was on 1st September / are you saying no use or no good ? Would you know what the latest firmware that you're happy with please ?

[Russell2024UK]

Hi Atlan Would you know what the latest firmware is for the FNIRSI 1013D that you're happy with please ?

[Russell2024UK]

Hi Atlan Would you know what the latest firmware is for the FNIRSI 1013D that you're happy with please ?

[Atlan]

 :24h

[Russell2024UK]

Atlan thank you 

[Russell2024UK]

Hi Atlan thanks again for your great help with this project  , Once a new firmware is on its way replacing the current  V0.025h version...( i encountered a few issues with DC shift on Firmware V0.025j ) As you know New Firmwares include various enhancements, bug fixes, or new features that could be critical for the 1013D oscilloscope's performance. I would be glad to help with any testing you require just let me know ? 

[Felipe Lacerda]

firmware 0.025j change dc shift, try it. fix single mode switch sample freq, change button in diag screen

Removed this version? Any serious problems?

I'm using it, and it looks great!
The default calibration already aligns the cursor very close to the center and doesn't lose position when reducing the scale to 200mV/div  (as happened in the 25h version)

But.. calibration range has little sensitivity.
The default value for the cursor position is 112, reducing it to the minimum of 100 moved 1 pixel, which is too little.
I only needed to move 1 more pixel for ideal centering  (80 might be enough)

[Atlan]

PC: is the speed of access to the port limited somewhere? I tried switching the SCL pin and the maximum speed is 2.5MHz (172kHz in the basic settings of the I2C touch panel)

Bootloader 0.04 added the option of choosing the running mode. 0-PECO firmware, 1-FNIRSI, 2-FEL mode.
Stored at address 32, sector 710.
The preset mode is framed by a green frame.

It is necessary to add a setting option to the main program.

[pcprogrammer]

PC: is the speed of access to the port limited somewhere? I tried switching the SCL pin and the maximum speed is 2.5MHz (172kHz in the basic settings of the I2C touch panel)

Might be the peripheral itself. The datasheet/reference manual is very limited, so your guess is as good as mine.

[Atlan]

I can also ask for modification of the Loader program.  This is byte 32, sector 710 of the configuration.  Marked with orange color on the picture.  2bit if it is 1, the oscilloscope will start with the selection menu.  Bits 1 and 0. I decide what starts.  0 peco firmware, 1 fnirsi firmware, 2 Fel mode.  Example if the number 5 is there - the selection menu will be displayed and the fnirsi firmware will start.  If the number 1 is there, fnirsi will start, but the choice option will not be displayed.  And so on.  Place a 3 dot menu where bits 0 and 1 will be changed, to each dot the inscription Peco firmware, Fnirsi firmware, Fel mode, and a shortcut shelf that will set bit3, next to the shortcut shelf the inscription: displays the menu at startup.  Of course, first load the configuration, if the bits change, write the new configuration. You know how it's supposed to work.
I hope I described it well.  Thank you

[Russell2024UK]

I have  been asked - Don't Shoot the messenger  - Regards Integrating the RTC DS3231 Clock module within the FNIRSI 1013D oscilloscope with original firmware , Could it be possible to add a bootloader with multiple login modes, / Mode 0: Peco Firmware,Mode 1: FNIRSI Firmware (the original firmware that ships with the device)..Mode 2: FEL Mode (this mode allows flashing firmware via USB .. Could Mode 3: Original Firmware with Clock Integration: This could be a custom firmware that integrates the DS3231 module, allowing the user to set and view the clock using the original firmware ( Still keeping all the updated loaders when required )

[pcprogrammer]

I have  been asked - Don't Shoot the messenger  - Regards Integrating the RTC DS3231 Clock module within the FNIRSI 1013D oscilloscope with original firmware , Could it be possible to add a bootloader with multiple login modes, / Mode 0: Peco Firmware,Mode 1: FNIRSI Firmware (the original firmware that ships with the device)..Mode 2: FEL Mode (this mode allows flashing firmware via USB .. Could Mode 3: Original Firmware with Clock Integration: This could be a custom firmware that integrates the DS3231 module, allowing the user to set and view the clock using the original firmware ( Still keeping all the updated loaders when required )

 , sorry messenger.   

No, this is not a real option. The original source is not available and hacking the clock module into the existing binary will be a hell of a job, even with the knowledge available about the original firmware.

[Atlan]

Bootloader menu.

Added option to choose:
1-The boot menu is displayed at startup.
2-By default, the value of the running firmware.

For fnirsi firmware, the boot menu is currently always active. Without this measure, you would lose the ability to revert to an alternative firmware and change the boot option in the menu.

If the LOADER program is modified, it will be possible to select and change these settings there.

[Sleo]

I can also ask for modification of the Loader program.  This is byte 32, sector 710 of the configuration.  Marked with orange color on the picture.  2bit if it is 1, the oscilloscope will start with the selection menu.  Bits 1 and 0. I decide what starts.  0 peco firmware, 1 fnirsi firmware, 2 Fel mode.  Example if the number 5 is there - the selection menu will be displayed and the fnirsi firmware will start.  If the number 1 is there, fnirsi will start, but the choice option will not be displayed.  And so on.  Place a 3 dot menu where bits 0 and 1 will be changed, to each dot the inscription Peco firmware, Fnirsi firmware, Fel mode, and a shortcut shelf that will set bit3, next to the shortcut shelf the inscription: displays the menu at startup.  Of course, first load the configuration, if the bits change, write the new configuration. You know how it's supposed to work.
I hope I described it well.  Thank you

I suppose you mean next values for byte 32 of sector 710:
0x00 (0b00000000) - Peco FW, Boot menu not displayed
0x01 (0b00000001) - Fnirsi FW, Boot menu not displayed
0x02 (0b00000010) - FEL Mode, Boot menu not displayed
0x04 (0b00000100) - Peco FW, Boot menu displayed
0x05 (0b00000101) - Fnirsi FW, Boot menu displayed
0x06 (0b00000110) - FEL Mode, Boot menu displayed
Is this correct?

[Russell2024UK]

Hi pcprogrammer your reply says  No, this is not a real option. The original source is not available and hacking the clock module into the existing binary will be a hell of a job, even with the knowledge available about the original firmware.     Oh thats a shame, Thanks anyway

[Russell2024UK]

Hi Atlan Regarding the bootloader and the firmwares, My friend is enjoying using my 1013D ( Firmware V0.025h) with the time and date stamp feature RTC DS3231 Clock module I soldered within my FNIRSI 1013D. My friend finds (saving pics SAVE PIC ) and (waveforms  SAVE WAVE ) with timestamps very very helpful.        However he likes the original firmware and says it performs better ( Looking) with higher MHz signals. He would like a trade-off between the smoother signal rendering at higher frequencies and the enhanced features like time stamping with an Original Firmware. Like i said before if possible keep what you have just add another firmware original with RTC DS3231 Clock module. So keeping all the ongoing loaders you have & enhancements. We Fully understand This method is more complex because it involves deep-level bootloader modifications. Thanks again