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• I2C function in progress.

  tehaxor69 • 05/09/2017 at 00:37 • 0 comments

  Debugging the I2C registers is a bit more chalenging than the other periferals.

• USART with printing now working.

  tehaxor69 • 04/26/2017 at 21:38 • 0 comments

  USART without the RX part, now works. Messages are printed to the terminal window.

  This is the Arduino code I used for the sketch.
  

   void setup() {
     Serial.begin(9600); 
   }
   
   void loop() {
     Serial.print("Test UART Message " );
     Serial.println("0123456789");
     
     delay(2);                     
   }
  

  IRQ USART, UDRE "__vector_19" is responsible for writing out the TX buffer to I/O 0xC6
  

  "_ZN5Print5printEPKc" Is the subroutine that gets called to update the TX buffer.
  

• Fade Sketch + PWM now working.

  tehaxor69 • 04/25/2017 at 22:54 • 0 comments

  Register 0x88 OCR1AL and 0x89 OCR1AH comtrols the PWM duty rate.

  
  

• Blink sketch is now working.

  tehaxor69 • 04/22/2017 at 23:51 • 0 comments

  I finally got the blink sketch running.

  To get the blink sketch up and running in the Emulator, I had to get the CPU, Memory Mapper, GPIOs, and the timer overflow/compare IRQs working.

  The IRQ and "micros" function use SRAM 0x0007~0x000A as a 32bit timer.

  After all that fun stuff, I had an alternating bit in the PORTB register.

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