85 lines
3.7 KiB
C
85 lines
3.7 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_STM32_USBD_CDC_INTERFACE_H
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#define MICROPY_INCLUDED_STM32_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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#include "py/mpconfig.h"
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// Values for connect_state
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#define USBD_CDC_CONNECT_STATE_DISCONNECTED (0)
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#define USBD_CDC_CONNECT_STATE_CONNECTING (1)
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#define USBD_CDC_CONNECT_STATE_CONNECTED (2)
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// Flow control settings
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#define USBD_CDC_FLOWCONTROL_NONE (0)
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#define USBD_CDC_FLOWCONTROL_RTS (1)
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#define USBD_CDC_FLOWCONTROL_CTS (2)
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typedef struct _usbd_cdc_itf_t {
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usbd_cdc_state_t base; // state for the base CDC layer
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uint8_t rx_packet_buf[CDC_DATA_MAX_PACKET_SIZE]; // received data from USB OUT endpoint is stored in this buffer
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uint8_t rx_user_buf[MICROPY_HW_USB_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 rx_buf_full; // rx from host will be blocked while this is true
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uint8_t tx_buf[MICROPY_HW_USB_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 MICROPY_HW_USB_CDC_TX_DATA_SIZE when new data is available
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volatile uint16_t tx_buf_ptr_out; // increment this pointer modulo MICROPY_HW_USB_CDC_TX_DATA_SIZE when data is drained
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uint16_t tx_buf_ptr_out_next; // next position of above once transmission finished
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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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uint8_t cdc_idx; // between 0 and MICROPY_HW_USB_CDC_NUM-1
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volatile uint8_t connect_state; // indicates if we are connected
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uint8_t attached_to_repl; // indicates if interface is connected to REPL
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uint8_t flow; // USBD_CDC_FLOWCONTROL_* setting flags
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uint32_t bitrate;
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} usbd_cdc_itf_t;
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// This is implemented in usb.c
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usbd_cdc_itf_t *usb_vcp_get(int idx);
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static inline int usbd_cdc_is_connected(usbd_cdc_itf_t *cdc) {
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return cdc->connect_state == USBD_CDC_CONNECT_STATE_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_flow(usbd_cdc_itf_t *cdc, const uint8_t *buf, uint32_t len);
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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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void usbd_cdc_rx_event_callback(usbd_cdc_itf_t *cdc);
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#endif // MICROPY_INCLUDED_STM32_USBD_CDC_INTERFACE_H
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