/* * Copyright (c) 2022-2025, sakumisu * * SPDX-License-Identifier: Apache-2.0 */ #include "usbd_core.h" #include "usbd_cdc.h" /*!< endpoint address */ #define CDC_IN_EP 0x82 #define CDC_OUT_EP 0x02 #define CDC_INT_EP 0x81 #define USBD_VID 0x33C3 #define USBD_PID 0x7788 #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 }; #define READ_BUF_SIZE 2048 #define WRITE_BUF_SIZE 2048 static USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t read_buffer[READ_BUF_SIZE]; static USB_NOCACHE_RAM_SECTION USB_MEM_ALIGNX uint8_t write_buffer[WRITE_BUF_SIZE]; volatile bool ep_tx_busy_flag = false; volatile uint8_t dtr_enable = 0; #ifdef CONFIG_USB_HS #define CDC_MAX_MPS 512 #else #define CDC_MAX_MPS 64 #endif extern void usbd_cdc_acm_bulk_out(uint8_t ep, uint32_t nbytes); extern void usbd_cdc_acm_bulk_in(uint8_t ep, uint32_t nbytes); /*!< 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 }; #ifdef LPKG_CHERRYUSB_DEVICE_COMPOSITE void usbd_comp_acm_event_handler(uint8_t event) #else void usbd_event_handler(uint8_t event) #endif { switch (event) { case USBD_EVENT_RESET: dtr_enable = 0; ep_tx_busy_flag = false; 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: /* setup first out ep read transfer */ usbd_ep_start_read(cdc_out_ep.ep_addr, read_buffer, READ_BUF_SIZE); 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 ep, uint32_t nbytes) { memcpy(write_buffer, read_buffer, nbytes); if (ep_tx_busy_flag == false) { usbd_ep_start_write(cdc_in_ep.ep_addr, write_buffer, nbytes); ep_tx_busy_flag = true; } /* setup next out ep read transfer */ usbd_ep_start_read(cdc_out_ep.ep_addr, read_buffer, READ_BUF_SIZE); } void usbd_cdc_acm_bulk_in(uint8_t ep, uint32_t nbytes) { if ((nbytes % CDC_MAX_MPS) == 0 && nbytes) { /* send zlp */ usbd_ep_start_write(cdc_in_ep.ep_addr, NULL, 0); } else { ep_tx_busy_flag = false; } } static struct usbd_interface intf0; static struct usbd_interface intf1; #ifdef LPKG_CHERRYUSB_DEVICE_COMPOSITE #include "composite_template.h" int usbd_comp_acm_init(uint8_t *ep_table, void *data) { cdc_out_ep.ep_addr = ep_table[1]; cdc_in_ep.ep_addr = ep_table[2]; usbd_add_interface(usbd_cdc_acm_init_intf(&intf0)); usbd_add_interface(usbd_cdc_acm_init_intf(&intf1)); usbd_add_endpoint(&cdc_out_ep); usbd_add_endpoint(&cdc_in_ep); return 0; } #endif int cdc_acm_deinit(void) { #ifndef LPKG_CHERRYUSB_DEVICE_COMPOSITE usbd_deinitialize(); #else usbd_comp_func_release(cdc_descriptor, "cdc_acm"); #endif dtr_enable = 0; ep_tx_busy_flag = false; return 0; } int cdc_acm_init(void) { 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', WRITE_BUF_SIZE - 10); #ifndef LPKG_CHERRYUSB_DEVICE_COMPOSITE usbd_desc_register(cdc_descriptor); usbd_add_interface(usbd_cdc_acm_init_intf(&intf0)); usbd_add_interface(usbd_cdc_acm_init_intf(&intf1)); usbd_add_endpoint(&cdc_out_ep); usbd_add_endpoint(&cdc_in_ep); usbd_initialize(); #else usbd_comp_func_register(cdc_descriptor, usbd_comp_acm_event_handler, usbd_comp_acm_init, "cdc_acm"); #endif return 0; } USB_INIT_APP_EXPORT(cdc_acm_init); void usbd_cdc_acm_set_dtr(uint8_t intf, bool dtr) { if (dtr) { dtr_enable = 1; } else { dtr_enable = 0; } } void cdc_acm_data_send_with_dtr_test(void) { if (dtr_enable) { ep_tx_busy_flag = true; usbd_ep_start_write(CDC_IN_EP, write_buffer, 2048); while (ep_tx_busy_flag) { } } }