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Showing posts from March, 2017

Yay, driving!

Haven't done this in a while. It feels good! A few brief notes on Steve 2.0: Raspberry Pi Zero W Arduino Pro Mini (4x PWM output/quadrature input/current sensing) Dagu Rover 5 four-motor chassis Dagu speed controller 5V USB 'phone charger' power for the electronics 6xNiMH AA power for the motors CSR Bluetooth USB dongle (the Pi Zero W bluetooth is not reliable for me) PlayStation 3 SIXAXIS remote control Nokia 5110 LCD with speed/current status display and on-board menu function To add - 3x Ultrasonic sensors and 2x IR line sensors.  

Motor test

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Humm. Wired up the Arduino but something's not right...

Flashing an AVR from a Raspberry Pi

It seems things have changed a bit since I last worked with an Arduino on a Raspberry Pi - plus I've forgotten a load of stuff. This is a note to myself, more than anything. You can install avrdude with sudo apt install avrdude . On a Raspberry Pi 3 or a Pi Zero W, the /dev/ttyAMA0 UART is used for Bluetooth. The GPIO pins are instead mapped to /dev/ttyS0. The Arduino Pro Mini (5V/16MHz) has an AtMega328P and the bootloader runs at 57,600 bps. You can find the built .hex file in /tmp/build*. The avrdude flash command line is: avrdude -p m328p -c arduino -P /dev/ttyS0 -U ./path/to/file.hex