a single data wire, serial monitor on an attiny13a using a 128x64 oled ssd1306 (just to clarify the attiny13 is the slave accepting serial text from a host) YOU CAN ONLY SEND UPPERCASE ASCII LETTERS KEEP THAT IN MIND!
this code assumes ur running at a frequency of 9.6mhz
HUGE THANKS TO WAGIMINATOR FOR HIS OLED LIBARY https://github.com/wagiminator/ATtiny13-TinyOLEDdemo/tree/main
connect the Host with the PB1 pin on the attiny13a, PB2 is used for looking into the internal timings
COMPILE USING AVR-GCC WITH Oz OPTIMIZATION
Bittimes are 45us
Send one : Set line low for 20us, set it high for atleast 25us
Send zero : Set line low for 35us, then set it high for atleast 10us
Send Reset : set line low for 5us, then set it high for atleast 40us
Sending any ASCII with lsb first, starting with a reset, will display the character.
For a line break send a NULL (0x00) via the bus and wait 150us
For resetting and clearing the Display send a (0x01) via the bus and wait 200ms (yes milliseconds)
IF YOU HAVE A COMMAND REQUEST YOU CAN TRY TO CONTACT ME ABOUT IT, I GOT ENOUGH CODESPACE LEFT FOR A FEW MAYBE
After sending a Byte successfully (which the slave wont tell you), you gotta wait another 150us for the
Slave to write to the display, if you need a higher speed you can also wait less
(no less than 100us though even at 100us issues arrise), recommended minimum is 120us. and Stable value is 150us
