Dear all:
Recently I designed a new PIXHAWK V6C flight controller as standard, using a STM32H743 FMU processor and a STMF103 IO processor.
I tested both I/O-PWM-OUT and SBUS-IN and found that neither was useful, and then I found that both were set up on IO processors. So I burned the px4_io-v2_bootloader.bin through the IO debug interface, and then the yellow light on the I/O side kept flashing.
By consulting the relevant information, I need to open a parameter called “SYS_USE_IO”, but I can’t find this parameter in QGC, and when I enter the relevant command in the MAVLINK console, the output is as follows:
NuttShell (NSH) NuttX-11.0.0
nsh> ver all
HW arch: PX4_FMU_V6C
HW type: V6C005005
HW version: 0x005
HW revision: 0x005
PX4 git-hash: 6ea3539157ca358c70a515878b77077af7d4611d
PX4 version: Release 1.16.0 (17826047)
OS: NuttX
OS version: Release 11.0.0 (184549631)
OS git-hash: 886acbbdb4f061e5c0ce1a76afbcfa7cb7df9849
Build datetime: Aug 6 2025 15:07:26
Build uri: localhost
Build variant: default
Toolchain: GNU GCC, 9.3.1 20200408 (release)
PX4GUID: 0006000000003934393331335102001c0035
MCU: STM32H7[4|5]xxx, rev. V
nsh> px4io status
INFO [px4io] PX4IO Not Supported
nsh> px4io start
INFO [px4io] PX4IO Not Supported
Now I have no clue about this problem, I hope someone can help if they encounter a similar problem, thank you!