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47ecbbbecb
This patch adds the configuration MICROPY_HW_USB_ENABLE_CDC2 which enables a new USB device configuration at runtime: VCP+VCP+MSC. It will give two independent VCP interfaces available via pyb.USB_VCP(0) and pyb.USB_VCP(1). The first one is the usual one and has the REPL on it. The second one is available for general use. This configuration is disabled by default because if the mode is not used then it takes up about 2200 bytes of RAM. Also, F4 MCUs can't support this mode on their USB FS peripheral (eg PYBv1.x) because they don't have enough endpoints. The USB HS peripheral of an F4 supports it, as well as both the USB FS and USB HS peripherals of F7 MCUs.
71 lines
3.2 KiB
C
71 lines
3.2 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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#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_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[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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uint8_t attached_to_repl; // indicates if interface is connected to REPL
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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->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_STM32_USBD_CDC_INTERFACE_H
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