search

bigtreetech / BTT-Pi

120 stars 20 forks source link

Unable to run ADXL345 from 40 GPIO pins #25

Closed Vicepredator closed 3 months ago

Vicepredator commented 6 months ago

Hi, i have a BTT-PI V1.2 and i'm trying to wire the ADXL345 sensor to the GPIO pins.

This is my configuration

[mcu rpi]
serial: /tmp/klipper_host_mcu

[adxl345]
cs_pin: None
spi_bus: spidev1.2

[resonance_tester]
accel_chip: adxl345
probe_points: 117.5,117.5,10

I've wired the sensor as follows

VCC -> 3.3V (Yellow pin)
GND -> GND (Black pin)
CS -> PG12
SDO -> PH8
SDA -> PH7
SCL -> PH6

I've tried with all the spi_bus in BoardEnv.txt, but nothing, it doesn't work.

Any clue?

Tankpadua commented 5 months ago

Why use the GPIO pins when the BTT Pi have the SPI port for the ADXL345 sensor?

Vicepredator commented 5 months ago

Because I would like to use a standard Amazon sensor, and I don't wanna buy the specific connector.

Gurkenfisch commented 5 months ago

Just connect it via the dedicated SPI port on the BTT-Pi I have just done that and it works.

mrvander18 commented 4 months ago

Yes, but how. There is no pinout that I can find that matches the BTT-Pi User Manual to the ADXL345.

User Manual ADXL345 Port Pinout 5V GND PC3 PC0 PC2 PC4

Board Pinout GND VCC CS INIT1 INIT2 SDO SDA SCL

Now the GND and VCC(5v) are easy enough and from GPIO pinout diagrams, one can deduce the INIT pins are ignored. But HOW do the PC pins map to CEO, Serial Data In, Out and Clock?

User Manual >> Board 5V >> VCC GND >> GND PC3 >> ?? PC0 >> ?? PC2 >> ?? PC4 >> ??

Amazon Generic Board: https://www.amazon.com/gp/product/B0BXWHTXWT/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Gurkenfisch commented 4 months ago

Ok so I have hooked it up via following:

5V >> VCC GND >> GND PC3 >> CS PC0 >> SCL PC2 >> SDA PC4 >> SDO

And then in Klipper I have set it up like the following:

[adxl345] #BTT PI cs_pin: host:gpio67 spi_bus: spidev0.0 axes_map: x,y,z

[resonance_tester] accel_chip: adxl345 accel_per_hz: 70 probe_points: 60,60,10

I am almost certain that I just followed the normal input shaper install instructions from there. I am not 100% sure though. It works for me with that wiring.

Vicepredator commented 3 months ago

Thanks, that seems good.

Hajto commented 1 month ago

I am having the same issue. Connected the board as in the chart above. No luck klipper detecting the adxl tho