deeplyembeddedwp / ssd1306-oled-display-driver-for-beaglebone Goto Github PK

Dear @deeplyembeddedWP , @giuliomoro

I hope you are well.

I have seen you are using on beaglebone the adafruit-ssd1306 in c and I2C.

From my side I am using Raspberry PI4 and I'd like to know if I clone the repository except to activate the I2C and maybe pins for I2C it should work?

Otherwise, is it possible to adapt the c library in javascript to use it with nodejs ?

If yes thanks if you could share how to make it.

Best Regards
Youssef

Hi,

I am currently creating a port of this graphics library to be used with the esp32. I believe I have found a bug in your transfer() function.

The buffer to hold chunks is 16 bytes;

/* Chunk Buffer */
static unsigned char chunk[16] = {0};

Your loop then allows access to the 17th element;

for(loop_2 = 1; loop_2 < 17; loop_2++)
chunk[loop_2] = screen[index++];

And later you memset 17 bytes again.

memset(chunk,0x00,17);

Other than that the library works great.

Thank you!!

would be great if you could support the sh1106 displays as well! they only are capable of a subset of commands i think.

I ran into this issue with your current distro, and went a-Googlin'.

I found others had had the same problem, and solved it. See:
google/periph#166

The same fix can be made here by changing (line 124, or thereabouts)

#define SSD1306_CONFIG_COM_PINS 0x12

to

#define SSD1306_CONFIG_COM_PINS 0x02

This may only affect users connecting their display in a certain way. I just tried the fix and it worked for me, then stopped caring about why.

I submit it here in case anyone else runs into the same issue. You can probably just close this right away and leave it around as a record of the fix.

Thanks for making your port of this library available!
Lumieria