jyapayne/switch-pico
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Emulate up to four controllers on the UART firmware

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UART protocol v3 adds a slot byte to input frames (v2 still accepted as
slot 0) and slot-tagged BB 03 rumble frames. The regular firmware exposes
SWITCH_PICO_UART_CONTROLLERS (default 4) Switch Pro interfaces like the
AIO build. The bridge shares one serial port across controllers, maps
index:port[:slot], and demuxes rumble by slot.
This commit is contained in:
Joey Yakimowich-Payne 2026-09-22 10:25:30 -06:00
commit b6a017eb06
14 changed files with 737 additions and 411 deletions
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8
CMakeLists.txt
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@ -564,8 +564,14 @@ if(SWITCH_PICO_INPUT_BACKEND STREQUAL "BLUEPAD32")
target_compile_definitions(switch-pico PRIVATE SWITCH_PICO_HD_RUMBLE=1)
endif()
else()
set(SWITCH_PICO_UART_CONTROLLERS 4 CACHE STRING
"Switch Pro controllers exposed by the UART firmware (1-4, one USB interface each)")
if(NOT SWITCH_PICO_UART_CONTROLLERS MATCHES "^[1-4]$")
message(FATAL_ERROR
"SWITCH_PICO_UART_CONTROLLERS must be 1, 2, 3 or 4 (got '${SWITCH_PICO_UART_CONTROLLERS}')")
endif()
target_compile_definitions(switch-pico PRIVATE
SWITCH_PICO_HID_INSTANCE_COUNT=1
SWITCH_PICO_HID_INSTANCE_COUNT=${SWITCH_PICO_UART_CONTROLLERS}
)
endif()