DougJoseph
commented
7 months ago Also, I'm a little confused about this step in the directions:
config.txt - replace the last section with:
[pi0w] enable_uart=1 dtoverlay=pi3-miniuart-bt
My config file has the following near the end:
## Enable Hardware UART for Serial Communication
## This also disables Bluetooth!
enable_uart=1
dtoverlay=disable-bt
...However, the directions mention pi3, and I'm using pi4b.
Also, the above code from my config file, is in a section called "[all]"
..and it contains other info. I'm not sure if I am supposed to just change "dtoverlay=disable-bt" to "dtoverlay=pi3-miniuart-bt" or replace the whole "[all]" section. ?
Here's how the latter portion of my config.txt file currently reads, from line 83 through to line 152.
[all]
####################################################
#### MainsailOS specific configurations ####
####################################################
#### DO NOT CHANGE SECTION BELOW !!! ####
#### UNLESS YOU KNOW WHAT YOU ARE DOING !!! ####
####################################################
## For more options and information see
## https://www.raspberrypi.com/documentation/computers/config_txt.html
## Some settings may impact device functionality. See link above for details
## For additional information about device filters see
## https://www.raspberrypi.com/documentation/computers/config_txt.html#model-filters
[pi0]
## This affects Pi Zero(W) and Pi Zero2
## Due lag of RAM, limit GPU RAM
gpu_mem=128
[pi2]
gpu_mem=256
[pi3]
## Use 256 if 1Gb Ram Model!
gpu_mem=128
# gpu_mem=256
[pi4]
## Do not use more than 256Mb on Pi Model 4, it uses its own Management.
gpu_mem=256
[all]
## SPI Interface is enabled by default for Input Shaper
## This colides with Hyperpixel Display!
## Hyperpixel Screen uses the same Pin for Backlight.
dtparam=spi=on
## Enable Hardware UART for Serial Communication
## This also disables Bluetooth!
enable_uart=1
#dtoverlay=disable-bt
dtoverlay=pi3-miniuart-bt
## Enable I2C by default.
## This is used by Klipper's Host MCU
## See https://www.klipper3d.org/RPi_microcontroller.html#optional-enabling-i2c
## for destails.
## For MPU Accelrometer please use
## dtparam=i2c_arm=on,i2c_arm_baudrate=400000
dtparam=i2c_arm=on
### EXPERIMENTAL - Enable 64bit Kernel
### The 64-bit kernel will only work on:
### Raspberry Pi 3, 3+, 4, 400, Zero 2 W and 2B rev 1.2
### and Raspberry Pi Compute Modules 3, 3+ and 4.
# arm_64bit=1
####################################################
[all]
Thanks for the great tutorial!
I had tried the wiring patch cable as shown, and had no power to the Pi, only to then later discover, the main board in the BIQU B1 I was working on, was an SKR2. I found a pinout diagram:
https://teamgloomy.github.io/images/skr_2.0_pins.png
...And in addition to showing that BTT reversed the order of the TFT pins, with 5v power and GND on the other end of the TFT block, it lists the (presumably Tx and Rx pins) as "PA9" and "PA10" instead of "Tx0" or "Rx0" — so I'm not sure whether the Tx and Rx functions were flipped or not, i.e. which is which.
I reoriented the wires in exactly the reverse order, in which my Tx and Rx wires are still being "flipped" with each other on the way to the main board, and I now have power, but the Klipper interface in the browser says:
mcu 'mcu': Unable to connectSo I guess next I could try flipping the Tx and Rx wires. ?
EDIT: OK, I flipped the Tx and Rx wires and tried again, and still no connection. I will retry both ways again, in case it was a connection issue.