SSD1306_SWITCHCAPVCC = generate display voltage from 3. Static const unsigned char PROGMEM logo_bmp = #define NUMFLAKES 10 // Number of snowflakes in the animation example #define OLED_RESET -1 // Reset pin # (or -1 if sharing Arduino reset pin)Īdafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET) Double-check the power, the wiring (that it matches the schematics. 477 typical old-style thermostat internal circuit, 479 315/433 MHz RF. The Arduino Nano does not include any built-in pull-up resistors nor a 3.3V power. Declaration for an SSD1306 display connected to I2C (SDA, SCL pins) 335 Tronixlabs Australia Expansion Shield for Arduino Nano, 266 tutorial. #define SCREEN_HEIGHT 64 // OLED display height, in pixels Its two main components are an Arduino Nano board 48 and a Texas Instruments TLC59401/TLC5940PWP 68 (the THT version of the board uses the old version. #define SCREEN_WIDTH 128 // OLED display width, in pixels BSD license, check license.txt for more information All text above, and the splash screen below must be included in any redistribution. Written by Limor Fried/Ladyada for Adafruit Industries, with contributions from the open source community. This example is for a 128x32 pixel display using I2C to communicate 3 pins are required to interface (two I2C and one reset).Īdafruit invests time and resources providing this open source code, please support Adafruit and open-source hardware by purchasing products from Adafruit! Pick one up today in the adafruit shop! -> This is an example for our Monochrome OLEDs based on SSD1306 drivers. With PORTC's TWI pins unconnected and PORTA's TWI pins hardwired to PORTF's TWI pins, it's unclear to me what advantage you could get out changing PORTMUX on an Arduino Nano Every.The following code should load: /********* In two configurations of PORTMUX under Dual TWI, the PF2 and PF3 are where the slave-only capability of the peripheral are broken out. The ATMega4809 has a "Dual TWI" mode apparently, where you can have just master mode on the pins that are normally both, and just slave mode on an alternate set of pins. I think I'd either been looking at an older datasheet or maybe disregarded those pins because of how they're hardwired over to PORTA on the Nano Every. You asked (in comments) about the TWI support indicated on PF2 and PF3 in the ATMega4809 datasheet. So, practically speaking, if you want I2C any pins other than A4 and A5 on a Nano Every, it means using a software (bit-banged) implementation of I2C. And PC2 and PC3 are the only two other ATMega4809 pins that PORTMUX will route the hardware I2C Master/Slave peripheral to. So if you wanted to do that, it would mean something like soldering wiring-wrap wire directly to the MCU pin, which would be difficult. But, in the Nano Every schematic, you can see these are not connected to anything. PORTMUX lets you switch the I2C Master/Slave or just Master peripheral onto pins PC2 and PC3 instead of PA2 and PA3. When it comes to using PORTMUX to switch choice of I2C pins, practically speaking, you won't be able to if you're looking to get alternate pins for TWI Master. In other words, they used two AVR pins to synthesize a single Arduino pin capable of both functions that were available on that pin on the older Nano boards. One of these pins on PORT F is connected to make the Arduino pin analogRead-capable and the other pins on PORT A are connected to make the Arduino pin Wire/I2C Master/Slave capable. To mirror the workings of the original Nano, where A4 and A5 were both analogRead pins and I2C/Wire Master/Slave pins, they connected A4 and A5 to pairs of ATMega4809 pins. That is, they are not connected to the analog-to-digital converter in the chip as they were in the Atmega328P on the old Arduino Nano boards. On the ATMega4809 the I2C/Wire Master/Slave signals on PORTA routed to the A5 and A4 pins are not also analogRead-capable. Likewise,Ī4, analogRead-capable pin, is also the I2C/Wire data signal. On these boards the A5, analogRead-capable pin, is also the I2C/Wire clock signal. The Nano Every was designed to be compatible with the original Nano boards that used the ATMega328P. Likewise for Arduino pin A4 and ATMega4809 pins PF02 and PA02. That is, Arduino pin A5 and ATMega4809 pins PF03 and PA03 are connected together by PCB traces such that there's no distinction between them, PF03 doesn't have its own header pin anywhere distinct from PA03. In the Nano Every schematic, PF2 and PF3 are connected over to PA2 and PA3 respectively.
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