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/*
* Copyright (c) 2025, sakumisu
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "usbd_core.h"
#include "usbd_cdc_acm.h"
/*!< endpoint address */
#define CDC_IN_EP 0x81
#define CDC_OUT_EP 0x02
#define CDC_INT_EP 0x83
#define USBD_VID 0xFFFF
#define USBD_PID 0xFFFF
#define USBD_MAX_POWER 100
#define USBD_LANGID_STRING 1033
/*!< config descriptor size */
#define USB_CONFIG_SIZE (9 + CDC_ACM_DESCRIPTOR_LEN)
#ifdef CONFIG_USB_HS
#define CDC_MAX_MPS 512
#else
#define CDC_MAX_MPS 64
#endif
static const uint8_t device_descriptor[] = {
USB_DEVICE_DESCRIPTOR_INIT(USB_2_0, 0xEF, 0x02, 0x01, USBD_VID, USBD_PID, 0x0100, 0x01)
};
static const uint8_t config_descriptor[] = {
USB_CONFIG_DESCRIPTOR_INIT(USB_CONFIG_SIZE, 0x02, 0x01, USB_CONFIG_BUS_POWERED, USBD_MAX_POWER),
CDC_ACM_DESCRIPTOR_INIT(0x00, CDC_INT_EP, CDC_OUT_EP, CDC_IN_EP, CDC_MAX_MPS, 0x02)
};
static const uint8_t device_quality_descriptor[] = {
///////////////////////////////////////
/// device qualifier descriptor
///////////////////////////////////////
0x0a,
USB_DESCRIPTOR_TYPE_DEVICE_QUALIFIER,
0x00,
0x02,
0x00,
0x00,
0x00,
0x40,
0x00,
0x00,
};
static const char *string_descriptors[] = {
(const char[]){ 0x09, 0x04 }, /* Langid */
"CherryUSB", /* Manufacturer */
"CherryUSB CDC DEMO", /* Product */
"2022123456", /* Serial Number */
};
static const uint8_t *device_descriptor_callback(uint8_t speed)
{
return device_descriptor;
}
static const uint8_t *config_descriptor_callback(uint8_t speed)
{
return config_descriptor;
}
static const uint8_t *device_quality_descriptor_callback(uint8_t speed)
{
return device_quality_descriptor;
}
static const char *string_descriptor_callback(uint8_t speed, uint8_t index)
{
if (index >= (sizeof(string_descriptors) / sizeof(char *))) {
return NULL;
}
return string_descriptors[index];
}
const struct usb_descriptor cdc_descriptor = {
.device_descriptor_callback = device_descriptor_callback,
.config_descriptor_callback = config_descriptor_callback,
.device_quality_descriptor_callback = device_quality_descriptor_callback,
.string_descriptor_callback = string_descriptor_callback
};
static void usbd_event_handler(uint8_t busid, uint8_t event)
{
switch (event) {
case USBD_EVENT_RESET:
break;
case USBD_EVENT_CONNECTED:
break;
case USBD_EVENT_DISCONNECTED:
break;
case USBD_EVENT_RESUME:
break;
case USBD_EVENT_SUSPEND:
break;
case USBD_EVENT_CONFIGURED:
break;
case USBD_EVENT_SET_REMOTE_WAKEUP:
break;
case USBD_EVENT_CLR_REMOTE_WAKEUP:
break;
default:
break;
}
}
extern void usbd_cdc_acm_serial_init(uint8_t busid, uint8_t in_ep, uint8_t out_ep);
void cdc_acm_chardev_init(uint8_t busid, uintptr_t reg_base)
{
usbd_desc_register(busid, &cdc_descriptor);
usbd_cdc_acm_serial_init(busid, CDC_IN_EP, CDC_OUT_EP);
usbd_initialize(busid, reg_base, usbd_event_handler);
}
static int cdc_acm_enter(int argc, char **argv)
{
(void)argc;
(void)argv;
finsh_set_device("usb-acm0");
rt_console_set_device("usb-acm0");
return 0;
}
MSH_CMD_EXPORT(cdc_acm_enter, cdc_acm_enter);
static int cdc_acm_exit(int argc, char **argv)
{
(void)argc;
(void)argv;
finsh_set_device(RT_CONSOLE_DEVICE_NAME);
rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
return 0;
}
MSH_CMD_EXPORT(cdc_acm_exit, cdc_acm_exit);
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