PB171 project

Assignment

Hardware part

Basic schematics

Schematics with high power consumption

Schematics of the peripherals

Software part

• src/setup.S: code for intializing cpu and interrupt vectors (defined only TIMER0_COMPA and TIMER1_COMPA)
• src/registers.h: definitions of registers and register bits
• src/interrupts.h: defines ISR macro for declaring interrupt handlers
• examples
  • analogRead.c: reads analog value from pin A5, which can be connected to a potentiometer
  • analogWrite.c: output pwm to pins 10 and 11, which can be connecte to leds
  • led.c: turns the builtin led on and off every second
  • uart.c: writes and reads to/from the console

To be able to run an example, you need to have installed these tools: make, avr-as, avr-gcc, avr-objcopy, avrdude. To run a , use:

make <example>-example-run DEVICE=<device>

led example:

make led-example-run DEVICE=/dev/ttyACM0

analogWrite example:

make analogWrite-example-run DEVICE=/dev/ttyACM0

uart example:

make uart-example-run DEVICE=/dev/ttyACM0 && \
stty -F /dev/ttyACM0 cs8 9600 ignbrk -brkint -icrnl -imaxbel -opost -onlcr -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke noflsh -ixon -crtscts && \
cat /dev/ttyACM0

Run echo -n 111 > /dev/ttyACM0 to send characters.

analogRead example:

make analogRead-example-run DEVICE=/dev/ttyACM0 && \
stty -F /dev/ttyACM0 cs8 9600 ignbrk -brkint -icrnl -imaxbel -opost -onlcr -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke noflsh -ixon -crtscts && \
cat /dev/ttyACM0

Platform independent functions

• src/bits_and_bytes.h

Basic functions

• basic_functions.c + basic_functions.h: port manipulating functions, timer functions
• src/analog.h + src/analog.c: analog functions

Class for communication with UART interface

• src/buffer.c + src/buffer.h: functions for manipulating buffer
• src/parse_int.c + src/parse_int.h: functions for parsing int
• src/uart.c + src/uart.h: functions for working with uart

Advanced peripherals

See examples/stop_watch.c