first commit

2026-01-04 17:02:34 +00:00
parent fc814755aa
commit 796cd05143
13 changed files with 647 additions and 0 deletions
--- a/usb_descriptors.c
+++ b/usb_descriptors.c
@@ -0,0 +1,67 @@
+#include "tusb.h"
+
+// Device Descriptor
+tusb_desc_device_t const desc_device = {
+    .bLength            = sizeof(tusb_desc_device_t),
+    .bDescriptorType    = TUSB_DESC_DEVICE,
+    .bcdUSB             = 0x0200,
+    .bDeviceClass       = 0x00,
+    .bDeviceSubClass    = 0x00,
+    .bDeviceProtocol    = 0x00,
+    .bMaxPacketSize0    = CFG_TUD_ENDPOINT0_SIZE,
+    .idVendor           = 0xCafe,   // Your Vendor ID
+    .idProduct          = 0x4001,   // Your Product ID
+    .bcdDevice          = 0x0100,
+    .iManufacturer      = 0x01,
+    .iProduct           = 0x02,
+    .iSerialNumber      = 0x03,
+    .bNumConfigurations = 0x01
+};
+
+uint8_t const * tud_descriptor_device_cb(void) {
+    return (uint8_t const *) &desc_device;
+}
+
+// Configuration Descriptor (MIDI)
+enum { ITF_NUM_MIDI = 0, ITF_NUM_MIDI_STREAMING, ITF_NUM_TOTAL };
+#define CONFIG_TOTAL_LEN  (TUD_CONFIG_DESC_LEN + TUD_MIDI_DESC_LEN)
+#define EPNUM_MIDI_IN     0x01
+#define EPNUM_MIDI_OUT    0x01
+
+uint8_t const desc_configuration[] = {
+    TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL, 0, CONFIG_TOTAL_LEN, 0x00, 100),
+    TUD_MIDI_DESCRIPTOR(ITF_NUM_MIDI, 0, EPNUM_MIDI_OUT, (0x80 | EPNUM_MIDI_IN), 64)
+};
+
+uint8_t const * tud_descriptor_configuration_cb(uint8_t index) {
+    return desc_configuration;
+}
+
+// String Descriptors (The source of your error)
+char const* string_desc_arr[] = {
+    (const char[]) { 0x09, 0x04 }, // 0: Supported language is English
+    "Raspberry Pi",                // 1: Manufacturer
+    "Go Volta Lights",            // 2: Product
+    "123456",                      // 3: Serial
+};
+
+static uint16_t _desc_str[32];
+
+uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid) {
+    (void) langid;
+    uint8_t chr_count;
+
+    if (index == 0) {
+        memcpy(&_desc_str[1], string_desc_arr[0], 2);
+        chr_count = 1;
+    } else {
+        if (!(index < sizeof(string_desc_arr)/sizeof(string_desc_arr[0]))) return NULL;
+        const char* str = string_desc_arr[index];
+        chr_count = strlen(str);
+        if (chr_count > 31) chr_count = 31;
+        for(uint8_t i=0; i<chr_count; i++) _desc_str[1+i] = str[i];
+    }
+
+    _desc_str[0] = (TUSB_DESC_STRING << 8 ) | (2*chr_count + 2);
+    return _desc_str;
+}