Flashed Klipper Firmware on Arduino Nano #

make menuconfig
- disabled low level config
- pulled down the compiled file, named the file firmware.hex
had avrdude from platformio

$ ~/.platformio/packages/tool-avrdude/avrdude -v -p atmega328p -C
$HOME/.platformio/packages/tool-avrdude/avrdude.conf -c arduino -b 57600 -D -P /dev/ttyUSB0 -U
flash:w:firmware.hex:i

Using Arduino Nano Atmega328P #

adxl345 - this on has on board voltage regulator
adxl is using could be using SPI or I2C
- some boards are forced into i2c mode with a pull-down resistor.
- klipper works with SPI.. our board is SPI
SPI needs the following pins

Arduino Pin	Arduino Pin Name	ADXL345 Pin
3V3		VCC
10	PB2 (actual name in printf.cfg)	CS
12	MOSI	SDO
11	MISO (Remember, data line.. master IN slave out)	SDA
13		SCL

looked at klipper source code
- ping for nano should be called just “spi”

final configuration is

[mcu adxl]
serial: /dev/serial/by-id/usb-1a86_USB2.0-Serial-if00-port0

[adxl345]
cs_pin: adxl:PB2
spi_bus: spi
axes_map: x,z,y

[resonance_tester]
accel_chip: adxl345
probe_points:
    60, 60, 20
##

Final product

Things to note for reference #

Compare with Pi Pico

ADXL345 pin	RPi Pico pin name	spi0a	spi0b	spi0c	spi1a	spi1b
GND	GND	38	38	38	38	38
CS	CSn	2 (GP1)	7 (GP5)	22 (GP17)	12 (GP9)	17 (GP13)
SDO	SPI RX	1 (GP0)	6 (GP4)	21 (GP16)	11 (GP8)	16 (GP12)
SDA	SPI TX	5 (GP3)	10 (GP7)	25 (GP19)	15 (GP11)	20 (GP15)
SCL	SPI SCK	4 (GP2)	9 (GP6)	24 (GP18)	14 (GP10)	19 (GP14)

Logs #

Thu 05/19/2022 #

05:06 Using PlatformIO
- Trying to use pio core to find Tiny85 to do do a test upload
  - had pyenv version, but removed it since it was old
  - had prebuilt binary sitting in .local/bin - removed it, because it was old
  - installed using brew, which will be easier to keep up with new versions, brew install platformio
- digispark attiny85 wont work, we’ll be using atmega328p 16mhz i have laying around
- ultimately, were looking to use klipper to compile, but need a way to push it to the MCU
06:01 ultimately

Sat 05/21/2022 #

10:48 Completed.