refactor: replace midi2_host (Waveshare) with midi2_host_feather

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.

1 files changed, 0 insertions, 326 deletions

diff --git a/examples/host/midi2_host/src/main.c b/examples/host/midi2_host/src/main.c
deleted file mode 100644
index e23fbfc87..000000000
--- a/examples/host/midi2_host/src/main.c
+++ /dev/null
@@ -1,326 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2026 Saulo Verissimo
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-// MIDI 2.0 Host Receiver Example
-//
-// Receives UMP from a MIDI 2.0 Device via PIO-USB Host.
-// SSD1306 OLED (I2C, 128x64) shows boot checklist then received UMP messages.
-
-#include <stdio.h>
-#include <string.h>
-#include "bsp/board_api.h"
-#include "tusb.h"
-#include "class/midi/midi2_host.h"
-#include "class/midi/midi.h"
-#include "display.h"
-
-//--------------------------------------------------------------------+
-// Checklist state
-//--------------------------------------------------------------------+
-
-static checklist_t ck = { 0 };
-static uint32_t note_count = 0;
-static uint8_t  midi2_idx = 0xFF;  // invalid until mount
-
-//--------------------------------------------------------------------+
-// Note name helper
-//--------------------------------------------------------------------+
-
-static const char* NOTE_NAMES[] = {
-  "C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B"
-};
-
-static void note_name(uint8_t pitch, char* buf, size_t len) {
-  int octave = (pitch / 12) - 1;
-  snprintf(buf, len, "%s%d", NOTE_NAMES[pitch % 12], octave);
-}
-
-//--------------------------------------------------------------------+
-// UMP Message Type names
-//--------------------------------------------------------------------+
-
-static const char* mt_name(uint8_t mt) {
-  switch (mt) {
-    case 0x0: return "Utility";
-    case 0x1: return "System";
-    case 0x2: return "M1 CVM";
-    case 0x3: return "SysEx7";
-    case 0x4: return "M2 CVM";
-    case 0x5: return "SysEx8";
-    case 0xD: return "Flex";
-    case 0xF: return "Stream";
-    default:  return "?";
-  }
-}
-
-//--------------------------------------------------------------------+
-// UMP decoder - extract and display MIDI 2.0 messages
-//--------------------------------------------------------------------+
-
-static void decode_ump(const uint32_t* words, uint8_t word_count) {
-  uint8_t mt = (uint8_t)((words[0] >> 28) & 0x0F);
-  char line[64];
-
-  if (mt == 0x4 && word_count >= 2) {
-    // MIDI 2.0 Channel Voice Message
-    uint8_t status  = (uint8_t)((words[0] >> 20) & 0x0F);
-    uint8_t channel = (uint8_t)((words[0] >> 16) & 0x0F);
-
-    switch (status) {
-      case 0x9: { // Note On
-        uint8_t pitch = (uint8_t)((words[0] >> 8) & 0x7F);
-        uint16_t vel  = (uint16_t)((words[1] >> 16) & 0xFFFF);
-        char nn[6];
-        note_name(pitch, nn, sizeof(nn));
-        snprintf(line, sizeof(line), "NoteOn  %s ch%u vel=0x%04X", nn, channel, vel);
-        display_log(line, 0x07E0); // green
-        note_count++;
-        break;
-      }
-      case 0x8: { // Note Off
-        uint8_t pitch = (uint8_t)((words[0] >> 8) & 0x7F);
-        char nn[6];
-        note_name(pitch, nn, sizeof(nn));
-        snprintf(line, sizeof(line), "NoteOff %s ch%u", nn, channel);
-        display_log(line, 0x8410); // grey
-        break;
-      }
-      case 0xB: { // CC
-        uint8_t idx = (uint8_t)((words[0] >> 8) & 0x7F);
-        snprintf(line, sizeof(line), "CC%-3u = 0x%08lX", idx, (unsigned long)words[1]);
-        display_log(line, 0x001F); // blue
-        break;
-      }
-      case 0xC: { // Program Change
-        uint8_t prog = (uint8_t)((words[1] >> 24) & 0x7F);
-        snprintf(line, sizeof(line), "ProgChg %u", prog);
-        display_log(line, 0xFFE0); // yellow
-        break;
-      }
-      case 0xE: { // Pitch Bend
-        snprintf(line, sizeof(line), "PBend = 0x%08lX", (unsigned long)words[1]);
-        display_log(line, 0xF81F); // magenta
-        break;
-      }
-      case 0xD: { // Channel Pressure
-        snprintf(line, sizeof(line), "CPress = 0x%08lX", (unsigned long)words[1]);
-        display_log(line, 0xFC10); // orange
-        break;
-      }
-      case 0xA: { // Poly Pressure
-        uint8_t pitch = (uint8_t)((words[0] >> 8) & 0x7F);
-        char nn[6];
-        note_name(pitch, nn, sizeof(nn));
-        snprintf(line, sizeof(line), "PolyP %s = 0x%08lX", nn, (unsigned long)words[1]);
-        display_log(line, 0xFC10);
-        break;
-      }
-      case 0xF: { // Per-Note Management
-        uint8_t pitch = (uint8_t)((words[0] >> 8) & 0x7F);
-        uint8_t flags = (uint8_t)(words[0] & 0xFF);
-        snprintf(line, sizeof(line), "PN-Mgmt note=%u flags=0x%02X", pitch, flags);
-        display_log(line, 0x07FF); // cyan
-        break;
-      }
-      default: {
-        snprintf(line, sizeof(line), "M2CVM status=0x%X", status);
-        display_log(line, 0xFFFF);
-        break;
-      }
-    }
-  } else if (mt == 0x0) {
-    // Utility (JR Timestamp, NOOP)
-    uint8_t status = (uint8_t)((words[0] >> 20) & 0x0F);
-    if (status == 0x2) {
-      uint16_t ts = words[0] & 0xFFFF;
-      snprintf(line, sizeof(line), "JR-TS = 0x%04X", ts);
-      display_log(line, 0x8410);
-    }
-  } else {
-    snprintf(line, sizeof(line), "MT=0x%X (%s) w0=0x%08lX",
-             mt, mt_name(mt), (unsigned long)words[0]);
-    display_log(line, 0xFFFF);
-  }
-}
-
-//--------------------------------------------------------------------+
-// MIDI 2.0 Host Callbacks
-//--------------------------------------------------------------------+
-
-void tuh_midi2_descriptor_cb(uint8_t idx, const tuh_midi2_descriptor_cb_t* d) {
-  (void)idx;
-  ck.descriptor_parsed = true;
-  char line[48];
-
-  snprintf(line, sizeof(line), "bcdMSC=0x%02X%02X proto=%s",
-           d->bcdMSC_hi, d->bcdMSC_lo,
-           d->protocol_version ? "MIDI2" : "MIDI1");
-  display_log(line, 0x07E0);
-
-  snprintf(line, sizeof(line), "Cables: RX=%u TX=%u",
-           d->rx_cable_count, d->tx_cable_count);
-  display_log(line, 0x07E0);
-
-  display_checklist_update(&ck);
-}
-
-void tuh_midi2_mount_cb(uint8_t idx, const tuh_midi2_mount_cb_t* m) {
-  midi2_idx = idx;
-  ck.alt_setting_ok = true;
-  ck.mounted = true;
-
-  char line[48];
-  snprintf(line, sizeof(line), "Mounted addr=%u alt=%u",
-           m->daddr, m->alt_setting_active);
-  display_log(line, 0x07E0);
-
-  if (m->protocol_version) {
-    display_log("MIDI 2.0 ready", 0x07E0);
-  } else {
-    display_log("MIDI 1.0 only", 0xFFE0);
-  }
-
-  display_checklist_update(&ck);
-}
-
-void tuh_midi2_rx_cb(uint8_t idx, uint32_t xferred_bytes) {
-  (void)xferred_bytes;
-  if (!ck.receiving) {
-    ck.receiving = true;
-    display_checklist_update(&ck);
-  }
-
-  uint32_t words[16];
-  while (1) {
-    uint32_t n = tuh_midi2_ump_read(idx, words, 16);
-    if (n == 0) break;
-
-    // Decode complete UMP messages
-    uint32_t i = 0;
-    while (i < n) {
-      uint8_t mt = (uint8_t)((words[i] >> 28) & 0x0F);
-      uint8_t wc = midi2_ump_word_count(mt);
-      if (i + wc > n) break;
-      decode_ump(&words[i], wc);
-      i += wc;
-    }
-  }
-}
-
-void tuh_midi2_tx_cb(uint8_t idx, uint32_t xferred_bytes) {
-  (void)idx; (void)xferred_bytes;
-}
-
-void tuh_midi2_umount_cb(uint8_t idx) {
-  (void)idx;
-  midi2_idx = 0xFF;
-  ck.device_connected = false;
-  ck.descriptor_parsed = false;
-  ck.alt_setting_ok = false;
-  ck.mounted = false;
-  ck.receiving = false;
-  note_count = 0;
-
-  display_log("Device disconnected", 0xF800);
-  display_checklist_update(&ck);
-}
-
-//--------------------------------------------------------------------+
-// Main
-//--------------------------------------------------------------------+
-
-int main(void) {
-  board_init();
-
-  display_init();
-
-  ck.pwr_on = true;
-  display_checklist_update(&ck);
-
-  // Init TinyUSB Host (BSP handles PIO-USB configuration via tuh_configure)
-  tusb_rhport_init_t host_init = {
-    .role = TUSB_ROLE_HOST,
-    .speed = TUSB_SPEED_FULL,
-  };
-  tusb_init(BOARD_TUH_RHPORT, &host_init);
-
-  ck.tusb_init = true;
-  ck.bus_active = true;
-  display_checklist_update(&ck);
-
-  char dbg[40];
-  snprintf(dbg, sizeof(dbg), "RHPORT=%u PIO_USB=%u",
-           BOARD_TUH_RHPORT, CFG_TUH_RPI_PIO_USB);
-  display_log(dbg, 0xFFE0);  // yellow
-  display_status("Waiting for device...");
-
-  uint32_t last_status_ms = 0;
-  static uint32_t loop_count = 0;
-
-  while (1) {
-    tuh_task();
-    loop_count++;
-
-    // Update status every 2 seconds
-    uint32_t now = tusb_time_millis_api();
-    if (now - last_status_ms > 2000) {
-      last_status_ms = now;
-      char line[22];
-      if (ck.receiving) {
-        snprintf(line, sizeof(line), "Notes:%lu", (unsigned long)note_count);
-      } else if (ck.mounted) {
-        snprintf(line, sizeof(line), "Mounted OK!");
-      } else if (ck.device_connected) {
-        snprintf(line, sizeof(line), "Dev found, mounting..");
-      } else {
-        snprintf(line, sizeof(line), "Wait.. t=%lu", (unsigned long)(now/1000));
-      }
-      display_status(line);
-    }
-  }
-
-  return 0;
-}
-
-// Generic USB device mount/unmount (any class)
-void tuh_mount_cb(uint8_t daddr) {
-  char line[32];
-  uint16_t vid, pid;
-  tuh_vid_pid_get(daddr, &vid, &pid);
-  snprintf(line, sizeof(line), "USB %04X:%04X a%u", vid, pid, daddr);
-  display_log(line, 0x07E0);
-  ck.device_connected = true;
-  display_checklist_update(&ck);
-}
-
-void tuh_umount_cb(uint8_t daddr) {
-  (void)daddr;
-  display_log("USB disconnected", 0xF800);
-  ck.device_connected = false;
-  ck.descriptor_parsed = false;
-  ck.alt_setting_ok = false;
-  ck.mounted = false;
-  ck.receiving = false;
-  display_checklist_update(&ck);
-}