67 lines
3.0 KiB
C
67 lines
3.0 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*/
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#ifndef MICROPY_INCLUDED_STMHAL_USBD_CDC_INTERFACE_H
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#define MICROPY_INCLUDED_STMHAL_USBD_CDC_INTERFACE_H
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/**
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******************************************************************************
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* @file USB_Device/CDC_Standalone/Inc/usbd_cdc_interface.h
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* @author MCD Application Team
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* @version V1.0.1
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* @date 26-February-2014
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* @brief Header for usbd_cdc_interface.c file.
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
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*
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* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
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* You may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.st.com/software_license_agreement_liberty_v2
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************
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*/
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#define USBD_CDC_RX_DATA_SIZE (1024) // this must be 2 or greater, and a power of 2
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#define USBD_CDC_TX_DATA_SIZE (1024) // I think this can be any value (was 2048)
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typedef struct _usbd_cdc_itf_t {
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usbd_cdc_msc_hid_state_t *usbd; // the parent USB device
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uint8_t rx_packet_buf[CDC_DATA_FS_MAX_PACKET_SIZE]; // received data from USB OUT endpoint is stored in this buffer
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uint8_t rx_user_buf[USBD_CDC_RX_DATA_SIZE]; // received data is buffered here until the user reads it
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volatile uint16_t rx_buf_put; // circular buffer index
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uint16_t rx_buf_get; // circular buffer index
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uint8_t tx_buf[USBD_CDC_TX_DATA_SIZE]; // data for USB IN endpoind is stored in this buffer
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uint16_t tx_buf_ptr_in; // increment this pointer modulo USBD_CDC_TX_DATA_SIZE when new data is available
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volatile uint16_t tx_buf_ptr_out; // increment this pointer modulo USBD_CDC_TX_DATA_SIZE when data is drained
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uint16_t tx_buf_ptr_out_shadow; // shadow of above
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uint8_t tx_buf_ptr_wait_count; // used to implement a timeout waiting for low-level USB driver
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uint8_t tx_need_empty_packet; // used to flush the USB IN endpoint if the last packet was exactly the endpoint packet size
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volatile uint8_t dev_is_connected; // indicates if we are connected
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} usbd_cdc_itf_t;
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static inline int usbd_cdc_is_connected(usbd_cdc_itf_t *cdc) {
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return cdc->dev_is_connected;
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}
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int usbd_cdc_tx_half_empty(usbd_cdc_itf_t *cdc);
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int usbd_cdc_tx(usbd_cdc_itf_t *cdc, const uint8_t *buf, uint32_t len, uint32_t timeout);
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void usbd_cdc_tx_always(usbd_cdc_itf_t *cdc, const uint8_t *buf, uint32_t len);
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int usbd_cdc_rx_num(usbd_cdc_itf_t *cdc);
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int usbd_cdc_rx(usbd_cdc_itf_t *cdc, uint8_t *buf, uint32_t len, uint32_t timeout);
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#endif // MICROPY_INCLUDED_STMHAL_USBD_CDC_INTERFACE_H
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