RP2040 MIDI Host

examples/host/CMakeLists.txt

@@ -11,4 +11,5 @@ family_add_subdirectory(cdc_msc_hid)
 family_add_subdirectory(cdc_msc_hid_freertos)
 family_add_subdirectory(device_info)
 family_add_subdirectory(hid_controller)
+family_add_subdirectory(midi_rx)
 family_add_subdirectory(msc_file_explorer)

examples/host/cdc_msc_hid/src/main.c

@@ -82,12 +82,12 @@ int main(void) {
 
 void tuh_mount_cb(uint8_t dev_addr) {
   // application set-up
-  printf("A device with address %d is mounted\r\n", dev_addr);
+  printf("A device with address %u is mounted\r\n", dev_addr);
 }
 
 void tuh_umount_cb(uint8_t dev_addr) {
   // application tear-down
-  printf("A device with address %d is unmounted \r\n", dev_addr);
+  printf("A device with address %u is unmounted \r\n", dev_addr);
 }
 
 

examples/host/device_info/src/tusb_config.h

@@ -109,8 +109,7 @@
 // only hub class is enabled
 #define CFG_TUH_HUB                 1
 
-// max device support (excluding hub device)
-// 1 hub typically has 4 ports
+// max device support (excluding hub device): 1 hub typically has 4 ports
 #define CFG_TUH_DEVICE_MAX          (3*CFG_TUH_HUB + 1)
 
 #ifdef __cplusplus

examples/host/midi_rx/CMakeLists.txt

@@ -0,0 +1,32 @@
+cmake_minimum_required(VERSION 3.20)
+
+include(${CMAKE_CURRENT_SOURCE_DIR}/../../../hw/bsp/family_support.cmake)
+
+# gets PROJECT name for the example
+family_get_project_name(PROJECT ${CMAKE_CURRENT_LIST_DIR})
+
+project(${PROJECT} C CXX ASM)
+
+# Checks this example is valid for the family and initializes the project
+family_initialize_project(${PROJECT} ${CMAKE_CURRENT_LIST_DIR})
+
+# Espressif has its own cmake build system
+if(FAMILY STREQUAL "espressif")
+  return()
+endif()
+
+add_executable(${PROJECT})
+
+# Example source
+target_sources(${PROJECT} PUBLIC
+  ${CMAKE_CURRENT_SOURCE_DIR}/src/main.c
+  )
+
+# Example include
+target_include_directories(${PROJECT} PUBLIC
+  ${CMAKE_CURRENT_SOURCE_DIR}/src
+  )
+
+# Configure compilation flags and libraries for the example without RTOS.
+# See the corresponding function in hw/bsp/FAMILY/family.cmake for details.
+family_configure_host_example(${PROJECT} noos)

examples/host/midi_rx/Makefile

@@ -0,0 +1,13 @@
+include ../../build_system/make/make.mk
+
+INC += \
+	src \
+	$(TOP)/hw \
+
+# Example source
+EXAMPLE_SOURCE += \
+	src/main.c
+
+SRC_C += $(addprefix $(CURRENT_PATH)/, $(EXAMPLE_SOURCE))
+
+include ../../build_system/make/rules.mk

examples/host/midi_rx/only.txt

@@ -0,0 +1,20 @@
+mcu:ESP32S2
+mcu:ESP32S3
+mcu:ESP32P4
+mcu:KINETIS_KL
+mcu:LPC175X_6X
+mcu:LPC177X_8X
+mcu:LPC18XX
+mcu:LPC40XX
+mcu:LPC43XX
+mcu:MAX3421
+mcu:MIMXRT1XXX
+mcu:MIMXRT10XX
+mcu:MIMXRT11XX
+mcu:MSP432E4
+mcu:RP2040
+mcu:RX65X
+mcu:RAXXX
+mcu:STM32F4
+mcu:STM32F7
+mcu:STM32H7

examples/host/midi_rx/src/main.c

@@ -0,0 +1,123 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Ha Thach (tinyusb.org)
+ *
+ * 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.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "bsp/board_api.h"
+#include "tusb.h"
+
+//--------------------------------------------------------------------+
+// STATIC GLOBALS DECLARATION
+//--------------------------------------------------------------------+
+
+//--------------------------------------------------------------------+
+// MACRO CONSTANT TYPEDEF PROTOTYPES
+//--------------------------------------------------------------------+
+void led_blinking_task(void);
+void midi_host_rx_task(void);
+
+/*------------- MAIN -------------*/
+int main(void) {
+  board_init();
+
+  printf("TinyUSB Host MIDI Example\r\n");
+
+  // init host stack on configured roothub port
+  tusb_rhport_init_t host_init = {
+    .role = TUSB_ROLE_HOST,
+    .speed = TUSB_SPEED_AUTO
+  };
+  tusb_init(BOARD_TUH_RHPORT, &host_init);
+
+  while (1) {
+    tuh_task();
+    led_blinking_task();
+    midi_host_rx_task();
+  }
+
+  return 0;
+}
+
+//--------------------------------------------------------------------+
+// Blinking Task
+//--------------------------------------------------------------------+
+void led_blinking_task(void) {
+  const uint32_t interval_ms = 1000;
+  static uint32_t start_ms = 0;
+
+  static bool led_state = false;
+
+  // Blink every interval ms
+  if (board_millis() - start_ms < interval_ms) return;// not enough time
+  start_ms += interval_ms;
+
+  board_led_write(led_state);
+  led_state = 1 - led_state;// toggle
+}
+
+//--------------------------------------------------------------------+
+// MIDI host receive task
+//--------------------------------------------------------------------+
+void midi_host_rx_task(void) {
+  // nothing to do, we just print out received data in callback
+}
+
+//--------------------------------------------------------------------+
+// TinyUSB Callbacks
+//--------------------------------------------------------------------+
+
+// Invoked when device with MIDI interface is mounted.
+void tuh_midi_mount_cb(uint8_t idx, const tuh_midi_mount_cb_t* mount_cb_data) {
+  printf("MIDI Interface Index = %u, Address = %u, Number of RX cables = %u, Number of TX cables = %u\r\n",
+          idx, mount_cb_data->daddr, mount_cb_data->rx_cable_count, mount_cb_data->tx_cable_count);
+}
+
+// Invoked when device with hid interface is un-mounted
+void tuh_midi_umount_cb(uint8_t idx) {
+  printf("MIDI Interface Index = %u is unmounted\r\n", idx);
+}
+
+void tuh_midi_rx_cb(uint8_t idx, uint32_t xferred_bytes) {
+  if (xferred_bytes == 0) {
+    return;
+  }
+
+  uint8_t buffer[48];
+  uint8_t cable_num = 0;
+  uint32_t bytes_read = tuh_midi_stream_read(idx, &cable_num, buffer, sizeof(buffer));
+
+  printf("Cable %u rx: ", cable_num);
+  for (uint32_t i = 0; i < bytes_read; i++) {
+    printf("%02X ", buffer[i]);
+  }
+  printf("\r\n");
+}
+
+void tuh_midi_tx_cb(uint8_t idx, uint32_t xferred_bytes) {
+  (void) idx;
+  (void) xferred_bytes;
+}

examples/host/midi_rx/src/tusb_config.h

@@ -0,0 +1,118 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2019 Ha Thach (tinyusb.org)
+ *
+ * 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.
+ *
+ */
+
+#ifndef TUSB_CONFIG_H_
+#define TUSB_CONFIG_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+//--------------------------------------------------------------------
+// Common Configuration
+//--------------------------------------------------------------------
+
+// defined by compiler flags for flexibility
+#ifndef CFG_TUSB_MCU
+#error CFG_TUSB_MCU must be defined
+#endif
+
+// Espressif IDF requires "freertos/" prefix in include path
+#if TUSB_MCU_VENDOR_ESPRESSIF
+#define CFG_TUSB_OS_INC_PATH  freertos/
+#endif
+
+#ifndef CFG_TUSB_OS
+#define CFG_TUSB_OS           OPT_OS_NONE
+#endif
+
+#ifndef CFG_TUSB_DEBUG
+#define CFG_TUSB_DEBUG        0
+#endif
+
+/* USB DMA on some MCUs can only access a specific SRAM region with restriction on alignment.
+ * Tinyusb use follows macros to declare transferring memory so that they can be put
+ * into those specific section.
+ * e.g
+ * - CFG_TUSB_MEM SECTION : __attribute__ (( section(".usb_ram") ))
+ * - CFG_TUSB_MEM_ALIGN   : __attribute__ ((aligned(4)))
+ */
+#ifndef CFG_TUH_MEM_SECTION
+#define CFG_TUH_MEM_SECTION
+#endif
+
+#ifndef CFG_TUH_MEM_ALIGN
+#define CFG_TUH_MEM_ALIGN     __attribute__ ((aligned(4)))
+#endif
+
+//--------------------------------------------------------------------
+// Host Configuration
+//--------------------------------------------------------------------
+
+// Enable Host stack
+#define CFG_TUH_ENABLED       1
+
+#if CFG_TUSB_MCU == OPT_MCU_RP2040
+  // #define CFG_TUH_RPI_PIO_USB   1 // use pio-usb as host controller
+  // #define CFG_TUH_MAX3421       1 // use max3421 as host controller
+
+  // host roothub port is 1 if using either pio-usb or max3421
+  #if (defined(CFG_TUH_RPI_PIO_USB) && CFG_TUH_RPI_PIO_USB) || (defined(CFG_TUH_MAX3421) && CFG_TUH_MAX3421)
+    #define BOARD_TUH_RHPORT      1
+  #endif
+#endif
+
+// Default is max speed that hardware controller could support with on-chip PHY
+#define CFG_TUH_MAX_SPEED     BOARD_TUH_MAX_SPEED
+
+//------------------------- Board Specific --------------------------
+
+// RHPort number used for host can be defined by board.mk, default to port 0
+#ifndef BOARD_TUH_RHPORT
+#define BOARD_TUH_RHPORT      0
+#endif
+
+// RHPort max operational speed can defined by board.mk
+#ifndef BOARD_TUH_MAX_SPEED
+#define BOARD_TUH_MAX_SPEED   OPT_MODE_DEFAULT_SPEED
+#endif
+
+//--------------------------------------------------------------------
+// Driver Configuration
+//--------------------------------------------------------------------
+
+// Size of buffer to hold descriptors and other data used for enumeration
+#define CFG_TUH_ENUMERATION_BUFSIZE 256
+
+#define CFG_TUH_HUB                 1
+// max device support (excluding hub device): 1 hub typically has 4 ports
+#define CFG_TUH_DEVICE_MAX          (3*CFG_TUH_HUB + 1)
+#define CFG_TUH_MIDI                CFG_TUH_DEVICE_MAX
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

hw/bsp/rp2040/family.c

@@ -294,7 +294,9 @@ int board_getchar(void) {
 #if CFG_TUH_ENABLED && defined(CFG_TUH_MAX3421) && CFG_TUH_MAX3421
 
 void max3421_int_handler(uint gpio, uint32_t event_mask) {
-  if (!(gpio == MAX3421_INTR_PIN && event_mask & GPIO_IRQ_EDGE_FALL)) return;
+  if (!(gpio == MAX3421_INTR_PIN && event_mask & GPIO_IRQ_EDGE_FALL)) {
+    return;
+  }
   tuh_int_handler(BOARD_TUH_RHPORT, true);
 }
 

hw/bsp/rp2040/family.cmake

@@ -113,6 +113,7 @@ target_sources(tinyusb_host_base INTERFACE
 		${TOP}/src/host/hub.c
 		${TOP}/src/class/cdc/cdc_host.c
 		${TOP}/src/class/hid/hid_host.c
+		${TOP}/src/class/midi/midi_host.c
 		${TOP}/src/class/msc/msc_host.c
 		${TOP}/src/class/vendor/vendor_host.c
 		)

src/CMakeLists.txt

@@ -29,6 +29,7 @@ function(tinyusb_target_add TARGET)
     ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/host/hub.c
     ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/class/cdc/cdc_host.c
     ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/class/hid/hid_host.c
+    ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/class/midi/midi_host.c
     ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/class/msc/msc_host.c
     ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/class/vendor/vendor_host.c
     # typec

src/class/audio/audio.h

@@ -661,6 +661,7 @@ typedef struct TU_ATTR_PACKED
   uint16_t wTotalLength      ; ///< Total number of bytes returned for the class-specific AudioControl interface descriptor. Includes the combined length of this descriptor header and all Clock Source, Unit and Terminal descriptors.
   uint8_t bmControls         ; ///< See: audio_cs_ac_interface_control_pos_t.
 } audio_desc_cs_ac_interface_t;
+TU_VERIFY_STATIC(sizeof(audio_desc_cs_ac_interface_t) == 9, "size is not correct");
 
 /// AUDIO Clock Source Descriptor (4.7.2.1)
 typedef struct TU_ATTR_PACKED

src/class/audio/audio_device.c

@@ -628,10 +628,6 @@ static uint8_t audiod_get_audio_fct_idx(audiod_function_t *audio);
 
 #if (CFG_TUD_AUDIO_ENABLE_EP_IN && (CFG_TUD_AUDIO_EP_IN_FLOW_CONTROL || CFG_TUD_AUDIO_ENABLE_ENCODING)) || (CFG_TUD_AUDIO_ENABLE_EP_OUT && CFG_TUD_AUDIO_ENABLE_DECODING)
 static void audiod_parse_for_AS_params(audiod_function_t *audio, uint8_t const *p_desc, uint8_t const *p_desc_end, uint8_t const as_itf);
-
-static inline uint8_t tu_desc_subtype(void const *desc) {
-  return ((uint8_t const *) desc)[2];
-}
 #endif
 
 #if CFG_TUD_AUDIO_ENABLE_EP_IN && CFG_TUD_AUDIO_EP_IN_FLOW_CONTROL