Wow my hello world 16f18446 got 21 downloads

[Mike - K8LH]

Interesting... I had problems with a 16F15325 I2C OLED demo (XC8) which sound similar to the problems you describe. I never did get the default I2C pins working and used another pair instead. Also, while the Datasheet and MCC generated files suggested I could test for completed I2C operations using only the MSSP interrupt flag, I couldn't get I2C working without also testing some other flags (S and P, IIRC) before testing the interrupt flag.

I did upgrade to XC8 v2.0 so I should probably test this again... Let me know if you'd like to see my 16F15325 I2C OLED program?

 

[Nigel Goodwin]

I did upgrade to XC8 v2.0 so I should probably test this again... Let me know if you'd like to see my 16F15325 I2C OLED program?

Worth a try with V2.0, I've just recently converted the AdaFruit OLED library to XC8, had it running on an 18F so far - although I've got a bit of a strange anomaly in one of the graphic demos, the filled rectangle one. Using the for/next loop in the demo one of the rectangles is taller than it should be - if I rewrite the demo as a linear series of instructions, with constants for the dimensions, it works fine?.

void testfillrect(void) 
{
  unsigned int color = SSD_WHITE;
  ssd1306_clearDisplay();
  for (unsigned int i=0; i<HEIGHT/2; i+=3) 
  {
    // alternate colours
    ADA_FillRect(i, i, WIDTH-i*2, HEIGHT-i*2, color);
    ssd1306_display();
    Delay_ms(3000);
    if (color==SSD_WHITE)
        color = SSD_BLACK;
    else
        color = SSD_WHITE;
    
  }
}

Incidentally, the plan is to potentially use it with the 16F18446, to that end I added a four pin I2C extesion socket to my PCB.