rt-thread-official/components/drivers/usb/cherryusb/demo/cdc_acm_template.c

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/*
* Copyright (c) 2024, sakumisu
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "usbd_core.h"
#include "usbd_cdc.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
/*!< global descriptor */
static const uint8_t cdc_descriptor[] = {
USB_DEVICE_DESCRIPTOR_INIT(USB_2_0, 0xEF, 0x02, 0x01, USBD_VID, USBD_PID, 0x0100, 0x01),
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),
///////////////////////////////////////
/// string0 descriptor
///////////////////////////////////////
USB_LANGID_INIT(USBD_LANGID_STRING),
///////////////////////////////////////
/// string1 descriptor
///////////////////////////////////////
0x14, /* bLength */
USB_DESCRIPTOR_TYPE_STRING, /* bDescriptorType */
'C', 0x00, /* wcChar0 */
'h', 0x00, /* wcChar1 */
'e', 0x00, /* wcChar2 */
'r', 0x00, /* wcChar3 */
'r', 0x00, /* wcChar4 */
'y', 0x00, /* wcChar5 */
'U', 0x00, /* wcChar6 */
'S', 0x00, /* wcChar7 */
'B', 0x00, /* wcChar8 */
///////////////////////////////////////
/// string2 descriptor
///////////////////////////////////////
0x26, /* bLength */
USB_DESCRIPTOR_TYPE_STRING, /* bDescriptorType */
'C', 0x00, /* wcChar0 */
'h', 0x00, /* wcChar1 */
'e', 0x00, /* wcChar2 */
'r', 0x00, /* wcChar3 */
'r', 0x00, /* wcChar4 */
'y', 0x00, /* wcChar5 */
'U', 0x00, /* wcChar6 */
'S', 0x00, /* wcChar7 */
'B', 0x00, /* wcChar8 */
' ', 0x00, /* wcChar9 */
'C', 0x00, /* wcChar10 */
'D', 0x00, /* wcChar11 */
'C', 0x00, /* wcChar12 */
' ', 0x00, /* wcChar13 */
'D', 0x00, /* wcChar14 */
'E', 0x00, /* wcChar15 */
'M', 0x00, /* wcChar16 */
'O', 0x00, /* wcChar17 */
///////////////////////////////////////
/// string3 descriptor
///////////////////////////////////////
0x16, /* bLength */
USB_DESCRIPTOR_TYPE_STRING, /* bDescriptorType */
'2', 0x00, /* wcChar0 */
'0', 0x00, /* wcChar1 */
'2', 0x00, /* wcChar2 */
'2', 0x00, /* wcChar3 */
'1', 0x00, /* wcChar4 */
'2', 0x00, /* wcChar5 */
'3', 0x00, /* wcChar6 */
'4', 0x00, /* wcChar7 */
'5', 0x00, /* wcChar8 */
'6', 0x00, /* wcChar9 */
#ifdef CONFIG_USB_HS
///////////////////////////////////////
/// device qualifier descriptor
///////////////////////////////////////
0x0a,
USB_DESCRIPTOR_TYPE_DEVICE_QUALIFIER,
0x00,
0x02,
0x02,
0x02,
0x01,
0x40,
0x01,
0x00,
#endif
0x00
};
USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t read_buffer[2048]; /* 2048 is only for test speed , please use CDC_MAX_MPS for common*/
USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t write_buffer[2048];
volatile bool ep_tx_busy_flag = false;
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:
ep_tx_busy_flag = false;
/* setup first out ep read transfer */
usbd_ep_start_read(busid, CDC_OUT_EP, read_buffer, 2048);
break;
case USBD_EVENT_SET_REMOTE_WAKEUP:
break;
case USBD_EVENT_CLR_REMOTE_WAKEUP:
break;
default:
break;
}
}
void usbd_cdc_acm_bulk_out(uint8_t busid, uint8_t ep, uint32_t nbytes)
{
USB_LOG_RAW("actual out len:%d\r\n", nbytes);
// for (int i = 0; i < 100; i++) {
// printf("%02x ", read_buffer[i]);
// }
// printf("\r\n");
/* setup next out ep read transfer */
usbd_ep_start_read(busid, CDC_OUT_EP, read_buffer, 2048);
}
void usbd_cdc_acm_bulk_in(uint8_t busid, uint8_t ep, uint32_t nbytes)
{
USB_LOG_RAW("actual in len:%d\r\n", nbytes);
if ((nbytes % usbd_get_ep_mps(busid, ep)) == 0 && nbytes) {
/* send zlp */
usbd_ep_start_write(busid, CDC_IN_EP, NULL, 0);
} else {
ep_tx_busy_flag = false;
}
}
/*!< endpoint call back */
struct usbd_endpoint cdc_out_ep = {
.ep_addr = CDC_OUT_EP,
.ep_cb = usbd_cdc_acm_bulk_out
};
struct usbd_endpoint cdc_in_ep = {
.ep_addr = CDC_IN_EP,
.ep_cb = usbd_cdc_acm_bulk_in
};
static struct usbd_interface intf0;
static struct usbd_interface intf1;
void cdc_acm_init(uint8_t busid, uint32_t reg_base)
{
const uint8_t data[10] = { 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30 };
memcpy(&write_buffer[0], data, 10);
memset(&write_buffer[10], 'a', 2038);
usbd_desc_register(busid, cdc_descriptor);
usbd_add_interface(busid, usbd_cdc_acm_init_intf(busid, &intf0));
usbd_add_interface(busid, usbd_cdc_acm_init_intf(busid, &intf1));
usbd_add_endpoint(busid, &cdc_out_ep);
usbd_add_endpoint(busid, &cdc_in_ep);
usbd_initialize(busid, reg_base, usbd_event_handler);
}
volatile uint8_t dtr_enable = 0;
void usbd_cdc_acm_set_dtr(uint8_t busid, uint8_t intf, bool dtr)
{
if (dtr) {
dtr_enable = 1;
} else {
dtr_enable = 0;
}
}
void cdc_acm_data_send_with_dtr_test(uint8_t busid)
{
if (dtr_enable) {
ep_tx_busy_flag = true;
usbd_ep_start_write(busid, CDC_IN_EP, write_buffer, 2048);
while (ep_tx_busy_flag) {
}
}
}