Week15 Assignment
design and build a wired &/or wireless network connecting at least two processors
I make two boards. One as bridge, one as node:
make -f hello.bus.45.make
sudo make -f hello.bus.45.make program-usbtiny
avr-objcopy -O ihex hello.bus.45.out hello.bus.45.c.hex;\
avr-size --mcu=attiny45 --format=avr hello.bus.45.out
AVR Memory Usage
----------------
Device: attiny45
Program: 768 bytes (18.8% Full)
(.text + .data + .bootloader)
Data: 4 bytes (1.6% Full)
(.data + .bss + .noinit)
avrdude -p t45 -P usb -c usbtiny -U flash:w:hello.bus.45.c.hex
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.01s
avrdude: Device signature = 0x1e9206
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 "hello.bus.45.c.hex"
avrdude: input file hello.bus.45.c.hex auto detected as Intel Hex
avrdude: writing flash (768 bytes):
Writing | ################################################## | 100% 1.07s
avrdude: 768 bytes of flash written
avrdude: verifying flash memory against hello.bus.45.c.hex:
avrdude: load data flash data from input file hello.bus.45.c.hex:
avrdude: input file hello.bus.45.c.hex auto detected as Intel Hex
avrdude: input file hello.bus.45.c.hex contains 768 bytes
avrdude: reading on-chip flash data:
Reading | ################################################## | 100% 1.48s
avrdude: verifying ...
avrdude: 768 bytes of flash verified
avrdude: safemode: Fuses OK (H:FF, E:DF, L:62)
avrdude done. Thank you.
Then connect the boards and fuse
Strange thing happened. Just connet my bus board to TTl2USB, the led would turn on. It shouldn't because no vcc is conneted to it. So I spent a lot of time to debug. Finally, I fould that I had soldered one of the TTL pin with another line:
After solving this mistake, I ran term.py in terminal:
python term.py /dev/tty.usbserial-A400gwhT 9600
And the led on the boards turn on according to the keyboard signals:
