This will emulate an arduino. Right now it loads the bootloader, then wait on it's "serial port"
(a pseudo tty) until someone programs it... eventualy it timesout and run the previous
app that was programmed.


Once that bridge is setup, launch simduino:

% ./simduino
	Starting atmega328 - flashend 7fff ramend 08ff e2end 03ff
	atmega328 init
	read_ihex_file: ATmegaBOOT_168_atmega328.ihex, unsupported check type 03
	Booloader 7800: 1950
	uart_pty_init bridge on port *** /dev/pts/11 ***
	uart_pty_connect: /tmp/simavr-uart0 now points to /dev/pts/11
	note: export SIMAVR_UART_XTERM=1 and install picocom to get a terminal
	UART-0 configured to 0010 = 58823 bps (x1), 5 data 1 stop
	Roughtly 136 usec per bytes

What that is done, you have a few seconds to program it:

% avrdude -p m328p -c arduino -P /tmp/simavr-uart0 -U flash:w:atmega328p_dummy_blinky.hex

	avrdude: AVR device initialized and ready to accept instructions
	
	Reading | ################################################## | 100% 0.01s
	
	avrdude: Device signature = 0x1e950f
	avrdude: NOTE: FLASH memory has been specified, an erase cycle will be performed
	         To disable this feature, specify the -D option.
	avrdude: erasing chip
	avrdude: reading input file "atmega328p_dummy_blinky.hex"
	avrdude: input file atmega328p_dummy_blinky.hex auto detected as Intel Hex
	avrdude: writing flash (394 bytes):
	
	Writing | ################################################## | 100% 0.15s
	
	avrdude: 394 bytes of flash written
	avrdude: verifying flash memory against atmega328p_dummy_blinky.hex:
	avrdude: load data flash data from input file atmega328p_dummy_blinky.hex:
	avrdude: input file atmega328p_dummy_blinky.hex auto detected as Intel Hex
	avrdude: input file atmega328p_dummy_blinky.hex contains 394 bytes
	avrdude: reading on-chip flash data:
	
	Reading | ################################################## | 100% 0.13s
	
	avrdude: verifying ...
	avrdude: 394 bytes of flash verified
	
	avrdude: safemode: Fuses OK
	
	avrdude done.  Thank you.

simduino will display that:

	Erasing page 0000 (128)
	Writing page 0000 (128)
	Erasing page 0001 (128)
	Writing page 0001 (128)
	Erasing page 0002 (128)
	Writing page 0002 (128)
	Erasing page 0003 (128)
	Writing page 0003 (128)

And then jump to the program that was programmed. The example doesn't do anything useful, it's
a placeholder...

Michel Pollet <buserror@gmail.com>