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--- 04_projects:03_rpi2040_pico_mmu [2025/08/19 17:47] – [Install Klipper on a PC] jattie
+++ 04_projects:03_rpi2040_pico_mmu [2025/08/19 20:53] (current) – [Connect the board to the main host application] jattie
@@ Line 43: / Line 43: @@
 make menuconfig
 </code>
+===== Create a Configuration =====
+Make Menuconfig brings up this application to easily chose and select options from.
 {{:04_projects:screenshot_2025-08-19_184502.png?direct|}}
@@ Line 48: / Line 52: @@
 For my test I chose the options as shown above.
-===== Create a Configuration =====
+The documentation I could find states the following:
+^Option	^Recommended Setting^Why^
+|Enable extra low-level configuration options	|✅ Enabled	|Required for RP2040-specific tuning|
+|Micro-controller Architecture	|Raspberry Pi RP2040/RP235x	|Matches your board|
+|Processor model	|rp2040	|Correct for Raspberry Pi Pico|
+|Bootloader offset	|No bootloader	|Pico uses drag-and-drop UF2 flashing|
+|Flash chip	|W25Q080 with CLKDIV 2	|Default for most Pico boards; safe choice|
+|Communication Interface	|USBSERIAL	|Needed to connect via USB to your K1 Max|
+|USB IDs	|Leave default	|Optional unless you need custom device IDs|
+|Optimize stepper code for 'step on both edges'	|✅ Enabled	|Improves stepper performance (recommended)|
+|GPIO pins to set at micro-controller startup	|Leave blank	|Only needed for special pin initialization|
 ===== Build the configuration =====
+<code bash>
+jattie@Jattie-PC:~/klipper$ make
+  Building out/autoconf.h
+  Compiling out/src/sched.o
+make: arm-none-eabi-gcc: No such file or directory
+make: *** [Makefile:65: out/src/sched.o] Error 127
+</code>
+<WRAP center round tip 60%>
+That error means your system is missing the ARM cross-compiler toolchain—specifically arm-none-eabi-gcc, which is required to compile firmware for ARM-based microcontrollers like the RP2040.
+</WRAP>
+This is resolved by installing the missing tools
+<code bash>
+jattie@Jattie-PC:~/klipper$ sudo apt update
+sudo apt install gcc-arm-none-eabi binutils-arm-none-eabi libnewlib-arm-none-eabi
+</code>
+Build then runs to completion as expected.
+<code bash>
+jattie@Jattie-PC:~/klipper$ make
+  Compiling out/src/sched.o
+  Compiling out/src/command.o
+  Compiling out/src/basecmd.o
+  Compiling out/src/debugcmds.o
+  Compiling out/src/initial_pins.o
+  Compiling out/src/gpiocmds.o
+  Compiling out/src/stepper.o
+  Compiling out/src/endstop.o
+  Compiling out/src/trsync.o
+  Compiling out/src/adccmds.o
+  Compiling out/src/spicmds.o
+  Compiling out/src/i2ccmds.o
+  Compiling out/src/pwmcmds.o
+  Compiling out/src/buttons.o
+  Compiling out/src/tmcuart.o
+  Compiling out/src/neopixel.o
+  Compiling out/src/pulse_counter.o
+  Compiling out/src/lcd_st7920.o
+  Compiling out/src/lcd_hd44780.o
+  Compiling out/src/spi_software.o
+  Compiling out/src/i2c_software.o
+  Compiling out/src/thermocouple.o
+  Compiling out/src/sensor_adxl345.o
+  Compiling out/src/sensor_lis2dw.o
+  Compiling out/src/sensor_mpu9250.o
+  Compiling out/src/sensor_icm20948.o
+  Compiling out/src/sensor_hx71x.o
+  Compiling out/src/sensor_ads1220.o
+  Compiling out/src/sensor_ldc1612.o
+  Compiling out/src/sensor_angle.o
+  Compiling out/src/sensor_bulk.o
+  Compiling out/src/sos_filter.o
+  Compiling out/src/load_cell_probe.o
+  Compiling out/src/rp2040/main.o
+  Compiling out/src/rp2040/watchdog.o
+  Compiling out/src/rp2040/gpio.o
+  Compiling out/src/rp2040/adc.o
+  Compiling out/src/generic/armcm_boot.o
+  Compiling out/src/generic/armcm_irq.o
+  Compiling out/src/generic/armcm_reset.o
+  Compiling out/src/generic/crc16_ccitt.o
+  Compiling out/src/rp2040/timer.o
+  Compiling out/src/generic/timer_irq.o
+  Compiling out/src/rp2040/bootrom.o
+  Compiling out/src/rp2040/usbserial.o
+  Compiling out/src/generic/usb_cdc.o
+  Compiling out/src/rp2040/chipid.o
+  Compiling out/src/rp2040/hard_pwm.o
+  Compiling out/src/rp2040/spi.o
+  Compiling out/src/rp2040/i2c.o
+  Building out/compile_time_request.o
+Version: v0.13.0-213-gd34d3b05b
+  Building rp2040 stage2 out/stage2.o
+  Preprocessing out/src/rp2040/rpxxxx_link.ld
+  Linking out/klipper.elf
+  Building out/lib/elf2uf2/elf2uf2
+  Creating uf2 file out/klipper.uf2
+</code>
 ===== Flash the binary to the Raspberry PI Pico 2040 =====
   * Plug the Pico into your computer while holding the BOOTSEL button, it will mount as a USB drive.
   * Copy klipper.uf2 to the Pico drive, it will reboot automatically.
+===== Test the Connection =====
+  * Plug the flashed pico into K1 Max USB Port
+  * Establish an SSH connection to the K1 Max and found the new serial device.
+<code ssh>
+root@creality /root [#] ls /dev/serial/by-id/
+usb-Klipper_rp2040_E66058388361172C-if00
+root@creality /root [#]
+</code>
+We seem to have a successful Klipper installation on the Pico 2040.
 ===== Connect the board to the main host application =====
+<WRAP center round tip 60%>
+Some basic testing to confirm all is well, add the basic config and simply blink the LED on the Pico 2040.
+</WRAP>
+<code ini>
+[mcu pico_2040_mmu]
+serial: /dev/serial/by-id/usb-Klipper_rp2040_E66058388361172C-if00
+[output_pin pico_led]
+pin: pico_2040_mmu:gpio25
+pwm: False
+shutdown_value: 0
+</code>
+Adding the config and restarting Klipper however yield this error:
+<code bash>
+MCU Protocol error
+This type of error is frequently caused by running an older
+version of the firmware on the micro-controller (fix by
+recompiling and flashing the firmware).
+Your Klipper version is: 09faed31-dirty
+MCU(s) which should be updated:
+mcu: Current version 1.3.0.40-5-g6977eaff-dirty-20230711_100121-ubuntu
+nozzle_mcu: Current version 1.3.0.40-5-g6977eaff-dirty-20230711_100254-ubuntu
+leveling_mcu: Current version 1.3.0.40-5-g6977eaff-dirty-20230711_095416-ubuntu
+Up-to-date MCU(s):
+Once the underlying issue is corrected, use the "RESTART"
+command to reload the config and restart the host software.
+mcu 'pico_2040_mmu': Multi-byte msgtag not supported
+</code>