2.42" 128x64 I2C OLED screen

[Jeff]

i think that a signal is floating somewhere... What about the "DC" pin ?

I had left DC floating - sorry, I thought I had mentioned this, probably only in the EAB forum post.

I had needed to connect this when using - so I didn't consider this.

So I connected DC to a GND pin - the JB one.....and....it's working, perfectly!!

I am so sorry that I did not mention that DC is floating. I've wasted a lot of your time.

No no problem, this was an good support exercise .

Will update the custom firmware page with the new screen support and some more options. Please test it carefully once available (in some minutes or tomorrow)

[Jeff]

i think that a signal is floating somewhere... What about the "DC" pin ?

I had left DC floating - sorry, I thought I had mentioned this, probably/possibly only in the EAB forum post.

I had not needed to connect this when using - so I didn't consider this.

So I connected DC to a GND pin - the JB one.....and....it's working, perfectly!!

I am so sorry that I did not mention that DC is floating. I've wasted a lot of your time.

Btw can you try to connect the RES to VCC ? (3.3V)
i will restore the buzzer function.

[solarmon]

Btw can you try to connect the RES to VCC ? (3.3V)
i will restore the buzzer function.

Yes, but RES needs to connect to VCC (5V or 3.3V) via a pullup resistor - so it cannot connect to VCC directly. That is why the RST, RX, TX Pins seems to be suitable/working since they are already connected to to VCC via internal pullup resistors in the STM32F105 chip. Or, with my setup, I can use the L3/L4/L5 anode holes (since I put header pins in them instead) which has a 1K resistor to 3.3V.

EDIT: Another option, which I have tested and it works, is to use a header pin jumper to connect DC to CS (which, in my case, is already bridged to GND using R18).

[Jeff]

New firmware online for your screen : https://hxc2001.com/custom_fw/
You may also want to enable the 400khz i2c bus speed to have some smoother experiences with 128x64 screens.

[solarmon]

New firmware online for your screen : https://hxc2001.com/custom_fw/
You may also want to enable the 400khz i2c bus speed to have some smoother experiences with 128x64 screens.

Thanks!

With the default font, the text is being doubled up.

I'm struggling to select an appropriate font that either does not double up, or is too big/wide.

Maybe the custom firmware page can somehow show examples of the font?

[Jeff]

New firmware online for your screen : https://hxc2001.com/custom_fw/
You may also want to enable the 400khz i2c bus speed to have some smoother experiences with 128x64 screens.

Thanks!

With the default font, the text is being doubled up.

I'm struggling to select an appropriate font that either does not double up, or is too big/wide.

Maybe the custom firmware page can somehow show examples of the font?

New update fixing the doubled lines :

https://hxc2001.com/custom_fw/

And i added the "Minimum row alignment" parameter to align the lines on the screen. On a 128x64 screen you can set 32 pixels to have the lines vertically justified.

[solarmon]

New update fixing the doubled lines :

https://hxc2001.com/custom_fw/

And i added the "Minimum row alignment" parameter to align the lines on the screen. On a 128x64 screen you can set 32 pixels to have the lines vertically justified.

Thank you.

The double lines have indeed disappeared.

However, when I choose default font (6x13 font) and set Minimum row alignment to 32, the second row of text disappears and the font is missing alternate lines:

[Jeff]

New update fixing the doubled lines :

https://hxc2001.com/custom_fw/

And i added the "Minimum row alignment" parameter to align the lines on the screen. On a 128x64 screen you can set 32 pixels to have the lines vertically justified.

Thank you.

The double lines have indeed disappeared.

However, when I choose default font (6x13 font) and set Minimum row alignment to 32, the second row of text disappears and the font is missing alternate lines:

According to the build order, you just haven't selected the right oled screen model

[solarmon]

According to the build order, you just haven't selected the right oled screen model

...indeed, I did! Oops!

Working perfectly now.

Thank you for your great support (and patience) and for such a brilliant Floppy Drive Emulator - keep up the great work!

[solarmon]

I have made some screen shots of the some of the different fonts - see:

https://imgur.com/a/G1dwDua

The only ones that seem to really work well are the smaller fonts - especially the 8x16 ones (with minimum row alignment set to 32)

The larger ones are a problem - especially for the track/side line, as this does not scroll and can get truncated. This is also a problem using the menus as the menu titles and options/settings texts can get truncated and does not scroll.

For the smaller fonts, having a larger 128x64 screen is of not much benefit (in terms of content) as still only two lines of text is displayed. And the whole text is not centered vertically, so the space at the bottom of the screen is larger than at the top.

[Jeff]

I have made some screen shots of the some of the different fonts - see:

https://imgur.com/a/G1dwDua

The only ones that seem to really work well are the smaller fonts - especially the 8x16 ones (with minimum row alignment set to 32)

The larger ones are a problem - especially for the track/side line, as this does not scroll and can get truncated. This is also a problem using the menus as the menu titles and options/settings texts can get truncated and does not scroll.

For the smaller fonts, having a larger 128x64 screen is of not much benefit (in terms of content) as still only two lines of text is displayed. And the whole text is not centered vertically, so the space at the bottom of the screen is larger than at the top.

Thanks for your tests !

I have fixed the fonts with the glitches and added some 8x32 fonts to address the 128x64 screen usage issues.

i have also added some line alignment values too.

20190312_233444.jpg (68.48 KiB) Viewed 6930 times

https://hxc2001.com/download/floppy_dri ... _notes.txt

https://hxc2001.com/custom_fw/

The larger ones are a problem - especially for the track/side line, as this does not scroll and can get truncated. This is also a problem using the menus as the menu titles and options/settings texts can get truncated and does not scroll.

Change the number of characters per lines in the General screen settings in these case.

[solarmon]

Hi,

Thanks - I'll check it out tonight!

BTW - what 0.96" OLED screen you using? I have two 0.96" OLED (one 4-pin and one 6-pin) screens that I can't get working.

[Jeff]

Hi,

Thanks - I'll check it out tonight!

BTW - what 0.96" OLED screen you using? I have two 0.96" OLED (one 4-pin and one 6-pin) screens that I can't get working.

i have 2 128x64 screens (one with a SSD1306 ic and another with SH1106). both are working with the hxc firmware. What is your model ? Some pictures ?

[solarmon]

i have 2 128x64 screens (one with a SSD1306 ic and another with SH1106). both are working with the hxc firmware. What is your model ? Some pictures ?

I'll create a separate post for my other screens.

I updated the gallery with a few more test pictures (with v3.1.40.3a in description):

https://imgur.com/a/G1dwDua

Some observations:

* Some of the fonts don't seem to scroll? (Scroll Speed is default = Normal)
* Some of the fonts are not vertically aligned - not sure whether this is just not selecting the right Minimum Row Alignment value.
* Font 12x23 (NEWDOS Uwe Sieber) seems to be messed up.

[Jeff]

* Some of the fonts don't seem to scroll? (Scroll Speed is default = Normal)

Already answered to this : you need to change the number of characters per line in the General screen settings section.

example : with a 16x20 font on a 128x32 screen you should set 128/16=8 characters per line.