/* * This file is part of the MicroPython project, http://micropython.org/ */ #ifndef MICROPY_INCLUDED_STMHAL_USBD_CDC_INTERFACE_H #define MICROPY_INCLUDED_STMHAL_USBD_CDC_INTERFACE_H /** ****************************************************************************** * @file USB_Device/CDC_Standalone/Inc/usbd_cdc_interface.h * @author MCD Application Team * @version V1.0.1 * @date 26-February-2014 * @brief Header for usbd_cdc_interface.c file. ****************************************************************************** * @attention * *

© COPYRIGHT(c) 2014 STMicroelectronics

* * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License"); * You may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.st.com/software_license_agreement_liberty_v2 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * ****************************************************************************** */ #define USBD_CDC_RX_DATA_SIZE (1024) // this must be 2 or greater, and a power of 2 #define USBD_CDC_TX_DATA_SIZE (1024) // I think this can be any value (was 2048) typedef struct _usbd_cdc_itf_t { USBD_HandleTypeDef *usb; // the parent USB device uint8_t rx_packet_buf[CDC_DATA_FS_MAX_PACKET_SIZE]; // received data from USB OUT endpoint is stored in this buffer uint8_t rx_user_buf[USBD_CDC_RX_DATA_SIZE]; // received data is buffered here until the user reads it volatile uint16_t rx_buf_put; // circular buffer index uint16_t rx_buf_get; // circular buffer index uint8_t tx_buf[USBD_CDC_TX_DATA_SIZE]; // data for USB IN endpoind is stored in this buffer uint16_t tx_buf_ptr_in; // increment this pointer modulo APP_TX_DATA_SIZE when new data is available volatile uint16_t tx_buf_ptr_out; // increment this pointer modulo APP_TX_DATA_SIZE when data is drained uint16_t tx_buf_ptr_out_shadow; // shadow of above uint8_t tx_buf_ptr_wait_count; // used to implement a timeout waiting for low-level USB driver uint8_t tx_need_empty_packet; // used to flush the USB IN endpoint if the last packet was exactly the endpoint packet size volatile uint8_t dev_is_connected; // indicates if we are connected } usbd_cdc_itf_t; static inline int usbd_cdc_is_connected(usbd_cdc_itf_t *cdc) { return cdc->dev_is_connected; } int usbd_cdc_tx_half_empty(usbd_cdc_itf_t *cdc); int usbd_cdc_tx(usbd_cdc_itf_t *cdc, const uint8_t *buf, uint32_t len, uint32_t timeout); void usbd_cdc_tx_always(usbd_cdc_itf_t *cdc, const uint8_t *buf, uint32_t len); int usbd_cdc_rx_num(usbd_cdc_itf_t *cdc); int usbd_cdc_rx(usbd_cdc_itf_t *cdc, uint8_t *buf, uint32_t len, uint32_t timeout); #endif // MICROPY_INCLUDED_STMHAL_USBD_CDC_INTERFACE_H