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#include "tusb.h"
#include "pico/unique_id.h"
#include "m1-pd-bmc.h"
/* Still a RPi Pico, but let's be creative anyway */
#define USBD_VID (0x2e8a)
#define USBD_PID (0x000a)
enum {
USBD_STR_LANGUAGE, // 0
USBD_STR_MANUFACTURER, // 1
USBD_STR_PRODUCT, // 2
USBD_STR_SERIAL_NUMBER, // 3
USBD_STR_CDC_0_NAME, // 4
USBD_STR_CDC_1_NAME, // 5
USBD_STR_LAST,
};
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_MANUFACTURER,
.iProduct = USBD_STR_PRODUCT,
.iSerialNumber = USBD_STR_SERIAL_NUMBER,
.bNumConfigurations = 1,
};
#define EPNUM_CDC_0_CMD (0x81)
#define EPNUM_CDC_0_DATA (0x82)
#define EPNUM_CDC_1_CMD (0x83)
#define EPNUM_CDC_1_DATA (0x84)
#define USBD_CDC_CMD_SIZE (64)
#define USBD_CDC_DATA_SIZE (64)
#define USBD_MAX_POWER_MA (250)
#define USBD_DESC_LEN(n) (TUD_CONFIG_DESC_LEN + TUD_CDC_DESC_LEN * (n))
enum {
ITF_NUM_CDC_0,
ITF_NUM_CDC_0_DATA,
ITF_NUM_CDC_1,
ITF_NUM_CDC_1_DATA,
ITF_NUM_TOTAL,
};
static const uint8_t usbd_desc_cfg_dual[USBD_DESC_LEN(2)] = {
TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL,
USBD_STR_LANGUAGE,
USBD_DESC_LEN(2),
TUSB_DESC_CONFIG_ATT_REMOTE_WAKEUP,
USBD_MAX_POWER_MA),
TUD_CDC_DESCRIPTOR(ITF_NUM_CDC_0,
USBD_STR_CDC_0_NAME,
EPNUM_CDC_0_CMD,
USBD_CDC_CMD_SIZE,
EPNUM_CDC_0_DATA & 0x7F,
EPNUM_CDC_0_DATA,
USBD_CDC_DATA_SIZE),
TUD_CDC_DESCRIPTOR(ITF_NUM_CDC_1,
USBD_STR_CDC_1_NAME,
EPNUM_CDC_1_CMD,
USBD_CDC_CMD_SIZE,
EPNUM_CDC_1_DATA & 0x7F,
EPNUM_CDC_1_DATA,
USBD_CDC_DATA_SIZE),
};
static const uint8_t usbd_desc_cfg_single[USBD_DESC_LEN(1)] = {
TUD_CONFIG_DESCRIPTOR(1, ITF_NUM_TOTAL - 2,
USBD_STR_LANGUAGE,
USBD_DESC_LEN(1),
TUSB_DESC_CONFIG_ATT_REMOTE_WAKEUP,
USBD_MAX_POWER_MA),
TUD_CDC_DESCRIPTOR(ITF_NUM_CDC_0,
USBD_STR_CDC_0_NAME,
EPNUM_CDC_0_CMD,
USBD_CDC_CMD_SIZE,
EPNUM_CDC_0_DATA & 0x7F,
EPNUM_CDC_0_DATA,
USBD_CDC_DATA_SIZE),
};
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;
if (get_valid_ports() == 2)
return usbd_desc_cfg_dual;
return usbd_desc_cfg_single;
}
#define DESC_STR_MAX_LENGTH 20
#define USB_DESC_STRLEN(l) ((TUSB_DESC_STRING << 8) | ((l + 1) * 2))
static void str8_to_str16(const char *str, uint16_t *str16)
{
int i;
for (i = 0; i < DESC_STR_MAX_LENGTH - 1 && str[i]; i++)
str16[i + 1] = str[i];
str16[0] = USB_DESC_STRLEN(i);
}
const uint16_t *tud_descriptor_string_cb(uint8_t index, uint16_t langid)
{
static uint16_t desc_str[DESC_STR_MAX_LENGTH];
if (index >= USBD_STR_LAST)
return NULL;
switch (index) {
case USBD_STR_LANGUAGE:
desc_str[0] = USB_DESC_STRLEN(1);
desc_str[1] = 0x0409; // English
break;
case USBD_STR_SERIAL_NUMBER: {
char str[DESC_STR_MAX_LENGTH] = {};
pico_unique_board_id_t id;
pico_get_unique_board_id(&id);
snprintf(str, DESC_STR_MAX_LENGTH,
"%02X%02X%02X%02X%02X%02X%02X%02X",
id.id[0], id.id[1], id.id[2], id.id[3],
id.id[4], id.id[5], id.id[6], id.id[7]);
str8_to_str16(str, desc_str);
break;
}
case USBD_STR_MANUFACTURER:
str8_to_str16("AAAFNRAA", desc_str);
break;
case USBD_STR_PRODUCT:
str8_to_str16("Central Scrutinizer", desc_str);
break;
case USBD_STR_CDC_0_NAME:
str8_to_str16("Port-0", desc_str);
break;
case USBD_STR_CDC_1_NAME:
str8_to_str16("Port-1", desc_str);
break;
}
return desc_str;
}
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