Adafruit_SSD1306.h - Other options

baffled2023 · April 13, 2024, 8:48am

Hi

Written some code for an ATtiny1606. Using the Adafruit_SSD1306.h to drive a 128x32 OLED.

I need mostly text (so yes, that could use the much smaller U8G2 text library or similar), but I need some very basic graphics, so I have had to go with the Adafruit_SSD1306.h.

I only need a rectangle command and a line command... that is literally it.
It fits on the ATtiny, but a 99% and I have no room for tinkering or adding any extra features.

Anyone know of a much lighter footprint library for drawing basic graphics? I tried using text based symbols for the lines but it just doesn't work well enough.

My only other though is possibly draw the graphics using some kind of array?

PaulRB · April 13, 2024, 8:49am

Maybe you are confusing U8X8 and U8G2?

I think U8G2 is what you need, assuming it's RAM that is the issue?

baffled2023 · April 13, 2024, 8:52am

Yes I meant U8X8. I'll download the U8g2 and have a look. I didn't think these did graphics

PaulRB · April 13, 2024, 8:59am

Yes, it does. U8X8 is part of U8G2, a part that only does text. U8G2 does graphics too.

U8G2 can use a "paged" mode which requires only 1/8th as much RAM as the Adafruit library. This can make updating the screen more difficult, because you can't just update any part of the screen any time you like. You have to re-draw the whole screen each time you need to change one part. As long as you know that in advance of writing your code, it's usually easy enough to deal with.

baffled2023 · April 13, 2024, 9:00am

Thanks Paul. I'll have a tinker with it

Koepel · April 13, 2024, 12:12pm

There are minimalistic "tiny" libraries. Search for "tiny" here: https://www.arduinolibraries.info/

The explanation of the three modes for u8g2 is here: https://github.com/olikraus/u8g2/wiki/setup_tutorial#u8g2-full-buffer--page-buffer-and-u8x8-mode

A working example in Wokwi simulation of the Tiny4kOLED library with a ATtiny85: https://wokwi.com/projects/292900020514980360

When user "upir" uses the Tiny4kOLED: https://wokwi.com/projects/382831807597597697

My own test if the u8x8 mode can do graphics (turn the potentiometer after starting the simulation): https://wokwi.com/projects/335358159873901139

And user "upir" using the u8x8 mode: https://wokwi.com/projects/389922195511764993

The u8g2 library in "page mode" uses 128 bytes or so (I don't remember how much it was), but as you can see, the u8x8 mode can do basic graphics.

baffled2023 · April 13, 2024, 2:59pm

Hmm, just keep getting piles of text overflow errors on the examples for the U8X8 library

avr/bin/ld.exe: region `text' overflowed by 437 bytes

Koepel · April 13, 2024, 3:39pm

Which examples ? how ? where ?
If it runs on a ATtiny85 (8 kbyte Flash, 512 byte SRAM) in Wokwi then it should work on your ATtiny1606.

The AVR chips are clock-accurate simulated in Wokwi. Can you try one of the working examples from Wokwi on your ATtiny1606 ?

Maybe there is a compatibility problem.
Can you show your sketch ?

baffled2023 · April 13, 2024, 5:36pm

OK. Wanted to use the U8x8 Full buffer version because of the graphics commands...

In file included from C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\variants\txy6/pins_arduino.h:27:0,
                 from C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\cores\megatinycore/Arduino.h:686,
                 from sketch\0-10v_Tester_v11.ino.cpp:1:
C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\cores\megatinycore/timers.h:53:101: note: #pragma message: Note: This part does not have a TCD, hence there is no PWM from TCD available.
     #pragma message("Note: This part does not have a TCD, hence there is no PWM from TCD available.")
                                                                                                     ^
In file included from C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\variants\txy6/pins_arduino.h:27:0,
                 from C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\cores\megatinycore/Arduino.h:686,
                 from C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\libraries\Wire\src\twi.c:24:
C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\cores\megatinycore/timers.h:53:13: note: #pragma message: Note: This part does not have a TCD, hence there is no PWM from TCD available.
     #pragma message("Note: This part does not have a TCD, hence there is no PWM from TCD available.")
             ^~~~~~~
In file included from C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\variants\txy6/pins_arduino.h:27:0,
                 from C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\cores\megatinycore/Arduino.h:686,
                 from C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\libraries\Wire\src\twi_pins.c:30:
C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\cores\megatinycore/timers.h:53:13: note: #pragma message: Note: This part does not have a TCD, hence there is no PWM from TCD available.
     #pragma message("Note: This part does not have a TCD, hence there is no PWM from TCD available.")
             ^~~~~~~
In file included from C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\variants\txy6/pins_arduino.h:27:0,
                 from C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\cores\megatinycore/Arduino.h:686,
                 from C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\libraries\Wire\src\Wire.cpp:35:
C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\cores\megatinycore/timers.h:53:101: note: #pragma message: Note: This part does not have a TCD, hence there is no PWM from TCD available.
     #pragma message("Note: This part does not have a TCD, hence there is no PWM from TCD available.")
                                                                                                     ^
In file included from C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\variants\txy6/pins_arduino.h:27:0,
                 from C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\cores\megatinycore/Arduino.h:686,
                 from C:\Users\steve\Documents\Arduino\libraries\U8g2\src\U8x8lib.h:43,
                 from C:\Users\steve\Documents\Arduino\libraries\U8g2\src\U8x8lib.cpp:40:
C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\cores\megatinycore/timers.h:53:101: note: #pragma message: Note: This part does not have a TCD, hence there is no PWM from TCD available.
     #pragma message("Note: This part does not have a TCD, hence there is no PWM from TCD available.")
                                                                                                     ^
In file included from C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\variants\txy6/pins_arduino.h:27:0,
                 from C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\cores\megatinycore/Arduino.h:686,
                 from C:\Users\steve\Documents\Arduino\libraries\U8g2\src\U8g2lib.h:49,
                 from C:\Users\steve\Documents\Arduino\libraries\U8g2\src\U8g2lib.cpp:40:
C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\cores\megatinycore/timers.h:53:101: note: #pragma message: Note: This part does not have a TCD, hence there is no PWM from TCD available.
     #pragma message("Note: This part does not have a TCD, hence there is no PWM from TCD available.")
                                                                                                     ^
In file included from C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\variants\txy6/pins_arduino.h:27:0,
                 from C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\cores\megatinycore/Arduino.h:686,
                 from C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\libraries\SPI\src\SPI.h:24,
                 from C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\libraries\SPI\src\SPI.cpp:22:
C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\cores\megatinycore/timers.h:53:101: note: #pragma message: Note: This part does not have a TCD, hence there is no PWM from TCD available.
     #pragma message("Note: This part does not have a TCD, hence there is no PWM from TCD available.")
                                                                                                     ^
c:/users/steve/appdata/local/arduino15/packages/dxcore/tools/avr-gcc/7.3.0-atmel3.6.1-azduino6/bin/../lib/gcc/avr/7.3.0/../../../../avr/bin/ld.exe: address 0x80411d of C:\Users\steve\AppData\Local\Temp\arduino_build_494949/0-10v_Tester_v11.ino.elf section `.bss' is not within region `data'
c:/users/steve/appdata/local/arduino15/packages/dxcore/tools/avr-gcc/7.3.0-atmel3.6.1-azduino6/bin/../lib/gcc/avr/7.3.0/../../../../avr/bin/ld.exe: address 0x80411d of C:\Users\steve\AppData\Local\Temp\arduino_build_494949/0-10v_Tester_v11.ino.elf section `.bss' is not within region `data'
collect2.exe: error: ld returned 1 exit status


Yea... lets give that option a miss
Too much RAM usage I am guessing

baffled2023 · April 13, 2024, 5:53pm

OK. Gave up on the U8x8 and U8x2 libraries. Just not worth the grief getting them to work.
Only managed to get some text displayed with the U8x8M but nothing else.

So tried basic Tiny4kOLED.h sketch and got this disaster.

..... I'll stick to the working Adafruit_SSD1306.h. Life's too short

In file included from C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\variants\txy6/pins_arduino.h:27:0,
                 from C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\cores\megatinycore/Arduino.h:686,
                 from sketch\0-10v_Tester_v11.ino.cpp:1:
C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\cores\megatinycore/timers.h:53:101: note: #pragma message: Note: This part does not have a TCD, hence there is no PWM from TCD available.
     #pragma message("Note: This part does not have a TCD, hence there is no PWM from TCD available.")
                                                                                                     ^
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp: In function 'void USI_TWI_Master_Initialise()':
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:64:3: error: 'PORT_USI' was not declared in this scope
   PORT_USI |=
   ^~~~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:64:3: note: suggested alternative: 'PORT_t'
   PORT_USI |=
   ^~~~~~~~
   PORT_t
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:66:11: error: 'PIN_USI_SDA' was not declared in this scope
        << PIN_USI_SDA); // Enable pullup on SDA, to set high as released state.
           ^~~~~~~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:69:11: error: 'PIN_USI_SCL' was not declared in this scope
        << PIN_USI_SCL); // Enable pullup on SCL, to set high as released state.
           ^~~~~~~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:71:3: error: 'DDR_USI' was not declared in this scope
   DDR_USI |= (1 << PIN_USI_SCL); // Enable SCL as output.
   ^~~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:74:3: error: 'USIDR' was not declared in this scope
   USIDR = 0xFF; // Preload dataregister with "released level" data.
   ^~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:75:3: error: 'USICR' was not declared in this scope
   USICR = (0 << USISIE) | (0 << USIOIE) | // Disable Interrupts.
   ^~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:75:17: error: 'USISIE' was not declared in this scope
   USICR = (0 << USISIE) | (0 << USIOIE) | // Disable Interrupts.
                 ^~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:75:33: error: 'USIOIE' was not declared in this scope
   USICR = (0 << USISIE) | (0 << USIOIE) | // Disable Interrupts.
                                 ^~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:76:17: error: 'USIWM1' was not declared in this scope
           (1 << USIWM1) | (0 << USIWM0) | // Set USI in Two-wire mode.
                 ^~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:76:33: error: 'USIWM0' was not declared in this scope
           (1 << USIWM1) | (0 << USIWM0) | // Set USI in Two-wire mode.
                                 ^~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:76:33: note: suggested alternative: 'USART0'
           (1 << USIWM1) | (0 << USIWM0) | // Set USI in Two-wire mode.
                                 ^~~~~~
                                 USART0
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:77:17: error: 'USICS1' was not declared in this scope
           (1 << USICS1) | (0 << USICS0) |
                 ^~~~~~
In file included from C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\variants\txy6/pins_arduino.h:27:0,
                 from C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\cores\megatinycore/Arduino.h:686,
                 from C:\Users\steve\Documents\Arduino\libraries\TinyWireM\TinyWireM.h:50,
                 from C:\Users\steve\Documents\Arduino\libraries\TinyWireM\TinyWireM.cpp:32:
C:\Users\steve\AppData\Local\Arduino15\packages\megaTinyCore\hardware\megaavr\2.6.8\cores\megatinycore/timers.h:53:101: note: #pragma message: Note: This part does not have a TCD, hence there is no PWM from TCD available.
     #pragma message("Note: This part does not have a TCD, hence there is no PWM from TCD available.")
                                                                                                     ^
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:77:33: error: 'USICS0' was not declared in this scope
           (1 << USICS1) | (0 << USICS0) |
                                 ^~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:77:33: note: suggested alternative: 'USART0'
           (1 << USICS1) | (0 << USICS0) |
                                 ^~~~~~
                                 USART0
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:78:17: error: 'USICLK' was not declared in this scope
           (1 << USICLK) | // Software stobe as counter clock source
                 ^~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:79:17: error: 'USITC' was not declared in this scope
           (0 << USITC);
                 ^~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:80:3: error: 'USISR' was not declared in this scope
   USISR = (1 << USISIF) | (1 << USIOIF) | (1 << USIPF) |
   ^~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:80:3: note: suggested alternative: 'ISR'
   USISR = (1 << USISIF) | (1 << USIOIF) | (1 << USIPF) |
   ^~~~~
   ISR
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:80:17: error: 'USISIF' was not declared in this scope
   USISR = (1 << USISIF) | (1 << USIOIF) | (1 << USIPF) |
                 ^~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:80:33: error: 'USIOIF' was not declared in this scope
   USISR = (1 << USISIF) | (1 << USIOIF) | (1 << USIPF) |
                                 ^~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:80:49: error: 'USIPF' was not declared in this scope
   USISR = (1 << USISIF) | (1 << USIOIF) | (1 << USIPF) |
                                                 ^~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:81:17: error: 'USIDC' was not declared in this scope
           (1 << USIDC) |    // Clear flags,
                 ^~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:82:19: error: 'USICNT0' was not declared in this scope
           (0x0 << USICNT0); // and reset counter.
                   ^~~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:82:19: note: suggested alternative: 'USART0'
           (0x0 << USICNT0); // and reset counter.
                   ^~~~~~~
                   USART0
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp: In function 'unsigned char USI_TWI_Start_Transceiver_With_Data(unsigned char*, unsigned char)':
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:161:13: error: 'USISIF' was not declared in this scope
       (1 << USISIF) | (1 << USIOIF) | (1 << USIPF) |
             ^~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:161:29: error: 'USIOIF' was not declared in this scope
       (1 << USISIF) | (1 << USIOIF) | (1 << USIPF) |
                             ^~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:161:45: error: 'USIPF' was not declared in this scope
       (1 << USISIF) | (1 << USIOIF) | (1 << USIPF) |
                                             ^~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:162:13: error: 'USIDC' was not declared in this scope
       (1 << USIDC) |    // Prepare register value to: Clear flags, and
             ^~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:163:15: error: 'USICNT0' was not declared in this scope
       (0x0 << USICNT0); // set USI to shift 8 bits i.e. count 16 clock edges.
               ^~~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:163:15: note: suggested alternative: 'USART0'
       (0x0 << USICNT0); // set USI to shift 8 bits i.e. count 16 clock edges.
               ^~~~~~~
               USART0
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:229:7: error: 'PORT_USI' was not declared in this scope
       PORT_USI &= ~(1 << PIN_USI_SCL);         // Pull SCL LOW.
       ^~~~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:229:7: note: suggested alternative: 'PORT_t'
       PORT_USI &= ~(1 << PIN_USI_SCL);         // Pull SCL LOW.
       ^~~~~~~~
       PORT_t
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:229:26: error: 'PIN_USI_SCL' was not declared in this scope
       PORT_USI &= ~(1 << PIN_USI_SCL);         // Pull SCL LOW.
                          ^~~~~~~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:230:7: error: 'USIDR' was not declared in this scope
       USIDR = *(msg++);                        // Setup data.
       ^~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:234:7: error: 'DDR_USI' was not declared in this scope
       DDR_USI &= ~(1 << PIN_USI_SDA); // Enable SDA as input.
       ^~~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:234:25: error: 'PIN_USI_SDA' was not declared in this scope
       DDR_USI &= ~(1 << PIN_USI_SDA); // Enable SDA as input.
                         ^~~~~~~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:266:7: error: 'DDR_USI' was not declared in this scope
       DDR_USI &= ~(1 << PIN_USI_SDA); // Enable SDA as input.
       ^~~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:266:25: error: 'PIN_USI_SDA' was not declared in this scope
       DDR_USI &= ~(1 << PIN_USI_SDA); // Enable SDA as input.
                         ^~~~~~~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:272:9: error: 'USIDR' was not declared in this scope
         USIDR = 0xFF; // Load NACK to confirm End Of Transmission.
         ^~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:274:9: error: 'USIDR' was not declared in this scope
         USIDR = 0x00; // Load ACK. Set data register bit 7 (output for SDA) low.
         ^~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp: In function 'unsigned char USI_TWI_Master_Transfer(unsigned char)':
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:295:3: error: 'USISR' was not declared in this scope
   USISR = temp;                          // Set USISR according to temp.
   ^~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:295:3: note: suggested alternative: 'ISR'
   USISR = temp;                          // Set USISR according to temp.
   ^~~~~
   ISR
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:297:16: error: 'USISIE' was not declared in this scope
   temp = (0 << USISIE) | (0 << USIOIE) | // Interrupts disabled
                ^~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:297:32: error: 'USIOIE' was not declared in this scope
   temp = (0 << USISIE) | (0 << USIOIE) | // Interrupts disabled
                                ^~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:298:16: error: 'USIWM1' was not declared in this scope
          (1 << USIWM1) | (0 << USIWM0) | // Set USI in Two-wire mode.
                ^~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:298:32: error: 'USIWM0' was not declared in this scope
          (1 << USIWM1) | (0 << USIWM0) | // Set USI in Two-wire mode.
                                ^~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:298:32: note: suggested alternative: 'USART0'
          (1 << USIWM1) | (0 << USIWM0) | // Set USI in Two-wire mode.
                                ^~~~~~
                                USART0
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:299:16: error: 'USICS1' was not declared in this scope
          (1 << USICS1) | (0 << USICS0) |
                ^~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:299:32: error: 'USICS0' was not declared in this scope
          (1 << USICS1) | (0 << USICS0) |
                                ^~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:299:32: note: suggested alternative: 'USART0'
          (1 << USICS1) | (0 << USICS0) |
                                ^~~~~~
                                USART0
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:300:16: error: 'USICLK' was not declared in this scope
          (1 << USICLK) | // Software clock strobe as source.
                ^~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:301:16: error: 'USITC' was not declared in this scope
          (1 << USITC);   // Toggle Clock Port.
                ^~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:304:5: error: 'USICR' was not declared in this scope
     USICR = temp; // Generate positve SCL edge.
     ^~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:305:14: error: 'PIN_USI' was not declared in this scope
     while (!(PIN_USI & (1 << PIN_USI_SCL)))
              ^~~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:305:30: error: 'PIN_USI_SCL' was not declared in this scope
     while (!(PIN_USI & (1 << PIN_USI_SCL)))
                              ^~~~~~~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:309:28: error: 'USIOIF' was not declared in this scope
   } while (!(USISR & (1 << USIOIF))); // Check for transfer complete.
                            ^~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:312:10: error: 'USIDR' was not declared in this scope
   temp = USIDR;                  // Read out data.
          ^~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:314:3: error: 'DDR_USI' was not declared in this scope
   DDR_USI |= (1 << PIN_USI_SDA); // Enable SDA as output.
   ^~~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:314:20: error: 'PIN_USI_SDA' was not declared in this scope
   DDR_USI |= (1 << PIN_USI_SDA); // Enable SDA as output.
                    ^~~~~~~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp: In function 'unsigned char USI_TWI_Master_Start()':
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:324:3: error: 'PORT_USI' was not declared in this scope
   PORT_USI |= (1 << PIN_USI_SCL); // Release SCL.
   ^~~~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:324:3: note: suggested alternative: 'PORT_t'
   PORT_USI |= (1 << PIN_USI_SCL); // Release SCL.
   ^~~~~~~~
   PORT_t
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:324:21: error: 'PIN_USI_SCL' was not declared in this scope
   PORT_USI |= (1 << PIN_USI_SCL); // Release SCL.
                     ^~~~~~~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:330:22: error: 'PIN_USI_SDA' was not declared in this scope
   PORT_USI &= ~(1 << PIN_USI_SDA); // Force SDA LOW.
                      ^~~~~~~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:336:9: error: 'USISR' was not declared in this scope
   if (!(USISR & (1 << USISIF))) {
         ^~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:336:9: note: suggested alternative: 'ISR'
   if (!(USISR & (1 << USISIF))) {
         ^~~~~
         ISR
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:336:23: error: 'USISIF' was not declared in this scope
   if (!(USISR & (1 << USISIF))) {
                       ^~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp: In function 'unsigned char USI_TWI_Master_Stop()':
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:349:3: error: 'PORT_USI' was not declared in this scope
   PORT_USI &= ~(1 << PIN_USI_SDA); // Pull SDA low.
   ^~~~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:349:3: note: suggested alternative: 'PORT_t'
   PORT_USI &= ~(1 << PIN_USI_SDA); // Pull SDA low.
   ^~~~~~~~
   PORT_t
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:349:22: error: 'PIN_USI_SDA' was not declared in this scope
   PORT_USI &= ~(1 << PIN_USI_SDA); // Pull SDA low.
                      ^~~~~~~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:350:21: error: 'PIN_USI_SCL' was not declared in this scope
   PORT_USI |= (1 << PIN_USI_SCL);  // Release SCL.
                     ^~~~~~~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:351:12: error: 'PIN_USI' was not declared in this scope
   while (!(PIN_USI & (1 << PIN_USI_SCL)))
            ^~~~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:358:9: error: 'USISR' was not declared in this scope
   if (!(USISR & (1 << USIPF))) {
         ^~~~~
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:358:9: note: suggested alternative: 'ISR'
   if (!(USISR & (1 << USIPF))) {
         ^~~~~
         ISR
C:\Users\steve\Documents\Arduino\libraries\TinyWireM\USI_TWI_Master.cpp:358:23: error: 'USIPF' was not declared in this scope
   if (!(USISR & (1 << USIPF))) {
                       ^~~~~
exit status 1
Error compiling for board ATtiny3226/3216/1626/1616/1606/826/816/806/426/416/406.

Koepel · April 13, 2024, 6:13pm

Did you read and check all those links ?

There is no u8x8 full buffer.
The u8g2 library has three modes:

Full buffer. A copy of the screen is kept in memory. Easy to use in the code.
Page buffer. Clumsy usage in the code. A "first page" then a number of "next page" in a while-loop.
u8x8. There is no buffer at all, everything is written directly to the display.

So the "core" that you use for the ATtiny is not compatible with the "tiny" library for the display. Okay, that is a disaster. Can you find other projects that use the ATtiny1606 ?

I have one small question: I have not seen a "Adafruit_SSD1307" by Adafruit yet. Which one do you use ?

david_2018 · April 14, 2024, 12:01pm

Which constructor did you use with U8x8? I do not get the warning messages that you are seeing when compiling a U8x8 example sketch using megaTinyCore set for an atmega1606.

Are you using multiple fonts? It is possible to save memory by using a customized font file that only includes the specific characters that you need.

baffled2023 · April 15, 2024, 6:30am

Yes I did try all the links. Spent quite a few hours on this.
Can't remember the constructor. Only loaded one font.

Don't worry. I'll just have to run at 99% used memory. It seems stable enough.

david_2018 · April 15, 2024, 10:56am

If the memory you are referring to is the flash memory (program memory), then 99% would be fine as far as stability is concerned, since that memory is fixed and will not change when the code is running.

system · October 12, 2024, 10:57am

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