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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2019 Damien P. George
*
* 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 "tusb.h"
#define USBD_VID (0x2E8A) // Raspberry Pi
#define USBD_PID (0x0005) // RP2 MicroPython
#define USBD_DESC_LEN (TUD_CONFIG_DESC_LEN + TUD_CDC_DESC_LEN)
#define USBD_MAX_POWER_MA (250)
#define USBD_ITF_CDC (0) // needs 2 interfaces
#define USBD_ITF_MAX (2)
#define USBD_CDC_EP_CMD (0x81)
#define USBD_CDC_EP_OUT (0x02)
#define USBD_CDC_EP_IN (0x82)
#define USBD_CDC_CMD_MAX_SIZE (8)
#define USBD_CDC_IN_OUT_MAX_SIZE (64)
#define USBD_STR_0 (0x00)
#define USBD_STR_MANUF (0x01)
#define USBD_STR_PRODUCT (0x02)
#define USBD_STR_SERIAL (0x03)
#define USBD_STR_CDC (0x04)
// Note: descriptors returned from callbacks must exist long enough for transfer to complete
static const tusb_desc_device_t usbd_desc_device = {
.bLength = sizeof(tusb_desc_device_t),
.bDescriptorType = TUSB_DESC_DEVICE,
.bcdUSB = 0x0200,
.bDeviceClass = TUSB_CLASS_MISC,
.bDeviceSubClass = MISC_SUBCLASS_COMMON,
.bDeviceProtocol = MISC_PROTOCOL_IAD,
.bMaxPacketSize0 = CFG_TUD_ENDPOINT0_SIZE,
.idVendor = USBD_VID,
.idProduct = USBD_PID,
.bcdDevice = 0x0100,
.iManufacturer = USBD_STR_MANUF,
.iProduct = USBD_STR_PRODUCT,
.iSerialNumber = USBD_STR_SERIAL,
.bNumConfigurations = 1,
};
static const uint8_t usbd_desc_cfg[USBD_DESC_LEN] = {
TUD_CONFIG_DESCRIPTOR(1, USBD_ITF_MAX, USBD_STR_0, USBD_DESC_LEN,
TUSB_DESC_CONFIG_ATT_REMOTE_WAKEUP, USBD_MAX_POWER_MA),
TUD_CDC_DESCRIPTOR(USBD_ITF_CDC, USBD_STR_CDC, USBD_CDC_EP_CMD,
USBD_CDC_CMD_MAX_SIZE, USBD_CDC_EP_OUT, USBD_CDC_EP_IN, USBD_CDC_IN_OUT_MAX_SIZE),
};
static const char *const usbd_desc_str[] = {
[USBD_STR_MANUF] = "MicroPython",
[USBD_STR_PRODUCT] = "Board in FS mode",
[USBD_STR_SERIAL] = "000000000000", // TODO
[USBD_STR_CDC] = "Board CDC",
};
const uint8_t *tud_descriptor_device_cb(void) {
return (const uint8_t *)&usbd_desc_device;
}
const uint8_t *tud_descriptor_configuration_cb(uint8_t index) {
(void)index;
return usbd_desc_cfg;
}
const uint16_t *tud_descriptor_string_cb(uint8_t index, uint16_t langid) {
#define DESC_STR_MAX (20)
static uint16_t desc_str[DESC_STR_MAX];
uint8_t len;
if (index == 0) {
desc_str[1] = 0x0409; // supported language is English
len = 1;
} else {
if (index >= sizeof(usbd_desc_str) / sizeof(usbd_desc_str[0])) {
return NULL;
}
const char *str = usbd_desc_str[index];
for (len = 0; len < DESC_STR_MAX - 1 && str[len]; ++len) {
desc_str[1 + len] = str[len];
}
}
// first byte is length (including header), second byte is string type
desc_str[0] = (TUSB_DESC_STRING << 8) | (2 * len + 2);
return desc_str;
}
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