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The variable is set in mount/umount callbacks but not read elsewhere
in the example (rx_cb already receives idx as a parameter). IAR
treats Pe550 as an error under --warnings_are_errors. Tag it
TU_ATTR_UNUSED so the example still shows the pattern of tracking
the device index without erroring on unused-set.
Co-Authored-By: Claude Opus 4.7 <[email protected]>
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Same fix as midi2_device — IAR rejects the unreachable statement
after the while(1) superloop. Let int main fall off the end.
Co-Authored-By: Claude Opus 4.7 <[email protected]>
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Drop Feather-specific scaffolding (SSD1306 display, font, PIO-USB pin
override) and rename the directory to midi2_host. The example is now a
single main.c + tusb_config.h pair following the midi_rx pattern, with a
printf-only UMP decoder for Channel Voice messages.
Build-tested on adafruit_feather_rp2040_usb_host, daisyseed (stm32h7),
mimxrt1010_evk, stm32f407disco, raspberry_pi_pico2, b_u585i_iot2a,
portenta_c33, stm32h503nucleo, stlinkv3mini, feather_stm32f405.
Ref #3571
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Remove the Waveshare RP2350-USB-A host example and board definition.
The Feather RP2040 USB Host is the TinyUSB reference board for
PIO-USB host and does not require the CFG_TUSB_DEBUG workaround
needed by the Waveshare (R13 pull-up issue).
One host example is sufficient for the PR. The Feather variant has
an improved display with splash, spinner, and 6-line live view.
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Add Host example that receives UMP from a MIDI 2.0 Device via PIO-USB
and displays received messages on a SSD1306 OLED (I2C, 128x64).
Features:
- Boot checklist on display (PWR, TinyUSB, USB bus, Device, Descriptor,
Alt Setting UMP, Mount, Receiving)
- Decode and display all MIDI 2.0 Channel Voice messages
- PIO-USB Host on rhport 1 (GP12/GP13 for Waveshare RP2350-USB-A)
- SSD1306 display via I2C0 (GP4=SDA, GP5=SCL)
Also add board definition for Waveshare RP2350-USB-A.
Tested: Waveshare RP2350-USB-A (Host) receiving UMP from Raspberry Pi
Pico (Device) via USB cable, notes displayed on SSD1306 OLED
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