83 lines
2.2 KiB
C++
83 lines
2.2 KiB
C++
#include <cstring>
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#include "pico/unique_id.h"
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#include "tusb.h"
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constexpr uint16_t USB_VID = 0x2E8A;
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constexpr uint16_t USB_PID = 0x000A;
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static constexpr tusb_desc_device_t desc_device = {
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sizeof(tusb_desc_device_t),
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TUSB_DESC_DEVICE,
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0x0200,
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TUSB_CLASS_MISC,
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MISC_SUBCLASS_COMMON,
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MISC_PROTOCOL_IAD,
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CFG_TUD_ENDPOINT0_SIZE,
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USB_VID,
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USB_PID,
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0x0100,
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1, 2, 3,
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1,
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};
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enum { ITF_NUM_CDC, ITF_NUM_CDC_DATA, ITF_NUM_TOTAL };
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constexpr uint8_t EPNUM_CDC_NOTIF = 0x81;
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constexpr uint8_t EPNUM_CDC_OUT = 0x02;
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constexpr uint8_t EPNUM_CDC_IN = 0x82;
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constexpr uint16_t CONFIG_TOTAL_LEN = TUD_CONFIG_DESC_LEN + TUD_CDC_DESC_LEN;
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static uint8_t const desc_configuration[] = {
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TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL, 0, CONFIG_TOTAL_LEN, 0x00, 100),
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TUD_CDC_DESCRIPTOR(ITF_NUM_CDC, 0, EPNUM_CDC_NOTIF, 8, EPNUM_CDC_OUT, EPNUM_CDC_IN, 64),
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};
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static constexpr const char* string_desc[] = {
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"\x09\x04",
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"picomap",
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"picomap",
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nullptr,
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};
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static uint16_t desc_str_buf[33];
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extern "C" {
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uint8_t const* tud_descriptor_device_cb(void) {
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return reinterpret_cast<uint8_t const*>(&desc_device);
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}
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uint8_t const* tud_descriptor_configuration_cb(uint8_t index) {
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return desc_configuration;
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}
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uint16_t const* tud_descriptor_string_cb(uint8_t index, uint16_t langid) {
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uint8_t chr_count;
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if (index == 0) {
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memcpy(&desc_str_buf[1], string_desc[0], 2);
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chr_count = 1;
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} else if (index == 3) {
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pico_unique_board_id_t uid;
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pico_get_unique_board_id(&uid);
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chr_count = 0;
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for (int i = 0; i < 8; i++) {
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desc_str_buf[1 + chr_count++] = "0123456789ABCDEF"[uid.id[i] >> 4];
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desc_str_buf[1 + chr_count++] = "0123456789ABCDEF"[uid.id[i] & 0xF];
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}
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} else {
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if (index >= sizeof(string_desc) / sizeof(string_desc[0])) return nullptr;
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const char* str = string_desc[index];
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if (!str) return nullptr;
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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_buf[1 + i] = str[i];
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}
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desc_str_buf[0] = static_cast<uint16_t>((TUSB_DESC_STRING << 8) | (2 * chr_count + 2));
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return desc_str_buf;
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}
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} // extern "C"
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