mirror of
https://github.com/cecio/USBvalve.git
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108 lines
3.3 KiB
C
108 lines
3.3 KiB
C
/*
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* USBvalve - USB Descriptors for TinyUSB
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*
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* Composite device: CDC (serial) + MSC (mass storage)
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*
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*/
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#include "tusb.h"
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#include "usb_config.h"
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//--------------------------------------------------------------------
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// Device Descriptor
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//--------------------------------------------------------------------
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static tusb_desc_device_t const desc_device = {
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.bLength = sizeof(tusb_desc_device_t),
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.bDescriptorType = TUSB_DESC_DEVICE,
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.bcdUSB = 0x0200, // USB 2.0
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.bDeviceClass = TUSB_CLASS_MISC,
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.bDeviceSubClass = MISC_SUBCLASS_COMMON,
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.bDeviceProtocol = MISC_PROTOCOL_IAD,
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.bMaxPacketSize0 = CFG_TUD_ENDPOINT0_SIZE,
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.idVendor = USB_VENDORID,
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.idProduct = USB_PRODUCTID,
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.bcdDevice = 0x0100,
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.iManufacturer = 0x01,
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.iProduct = 0x02,
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.iSerialNumber = 0x03,
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.bNumConfigurations = 0x01
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};
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uint8_t const* tud_descriptor_device_cb(void) {
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return (uint8_t const*)&desc_device;
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}
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//--------------------------------------------------------------------
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// Configuration Descriptor
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//--------------------------------------------------------------------
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enum {
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ITF_NUM_CDC = 0,
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ITF_NUM_CDC_DATA,
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ITF_NUM_MSC,
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ITF_NUM_TOTAL
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};
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#define EPNUM_CDC_NOTIF 0x81
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#define EPNUM_CDC_OUT 0x02
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#define EPNUM_CDC_IN 0x82
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#define EPNUM_MSC_OUT 0x03
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#define EPNUM_MSC_IN 0x83
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#define CONFIG_TOTAL_LEN (TUD_CONFIG_DESC_LEN + TUD_CDC_DESC_LEN + TUD_MSC_DESC_LEN)
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static uint8_t const desc_configuration[] = {
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// Config descriptor
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TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL, 0, CONFIG_TOTAL_LEN, 0x00, 100),
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// CDC: Interface Association + CDC Control + CDC Data
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TUD_CDC_DESCRIPTOR(ITF_NUM_CDC, 4, EPNUM_CDC_NOTIF, 8, EPNUM_CDC_OUT, EPNUM_CDC_IN, 64),
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// MSC
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TUD_MSC_DESCRIPTOR(ITF_NUM_MSC, 5, EPNUM_MSC_OUT, EPNUM_MSC_IN, 64),
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};
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uint8_t const* tud_descriptor_configuration_cb(uint8_t index) {
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(void)index;
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return desc_configuration;
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}
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//--------------------------------------------------------------------
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// String Descriptors
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//--------------------------------------------------------------------
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static char const* string_desc_arr[] = {
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[0] = (const char[]){0x09, 0x04}, // English
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[1] = USB_MANUF, // Manufacturer
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[2] = USB_DESCRIPTOR, // Product
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[3] = USB_SERIAL, // Serial
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[4] = "USBvalve CDC", // CDC Interface
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[5] = "USBvalve MSC", // MSC Interface
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};
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static uint16_t _desc_str[33];
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uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid) {
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(void)langid;
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uint8_t chr_count;
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if (index == 0) {
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memcpy(&_desc_str[1], string_desc_arr[0], 2);
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chr_count = 1;
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} else {
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if (index >= sizeof(string_desc_arr) / sizeof(string_desc_arr[0])) {
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return NULL;
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}
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const char* str = string_desc_arr[index];
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chr_count = strlen(str);
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if (chr_count > 31) chr_count = 31;
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for (uint8_t i = 0; i < chr_count; i++) {
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_desc_str[1 + i] = str[i];
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}
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}
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// First word is length (including header) and descriptor type
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_desc_str[0] = (TUSB_DESC_STRING << 8) | (2 * chr_count + 2);
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return _desc_str;
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}
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