Asynchron software UART for ATtiny 13A (or any AVR microCPU)
Writed in Atmel Studio 7.0 (C + Inline Assembler)
Features:
- No timer interrupt used for Sending/Receiving;
- Realy tiny code size (54 bytes for sending fucntion, 114 bytes for receiver interrupt);
- Receiver with automatic synchronization, synchronizing by STOP-bit of the flow transmitting;
- No nested function calls for Sending/Receiving;
- No memory used for variables, except receiving buffer (13 bytes by default), and flag variable;
- Applied receiving buffer overflow detection;
- Applied lost line detection.
- Flexible configuration for UART port pins;
- Flexible UART speed rate selection;
- Applied PGM-string send function;
- Applied binary representation convertion function;
- Applied hex representation convertion function;
- Applied byte to string convertion function;
- Applied word to string convertion function;
- Applied speeds from standart UART protocol range 9600-250000;
Disadvantages:
- Only zero-endings C-String sending data is possible (to get rid of nested function calls).