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micropython/ports/stm32/usbd_cdc_interface.h
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/* | |
* This file is part of the MicroPython project, http://micropython.org/ | |
*/ | |
#ifndef MICROPY_INCLUDED_STM32_USBD_CDC_INTERFACE_H | |
#define MICROPY_INCLUDED_STM32_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 | |
* | |
* <h2><center>© COPYRIGHT(c) 2014 STMicroelectronics</center></h2> | |
* | |
* 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. | |
* | |
****************************************************************************** | |
*/ | |
#include "py/mpconfig.h" | |
// Values for connect_state | |
#define USBD_CDC_CONNECT_STATE_DISCONNECTED (0) | |
#define USBD_CDC_CONNECT_STATE_CONNECTING (1) | |
#define USBD_CDC_CONNECT_STATE_CONNECTED (2) | |
// Flow control settings | |
#define USBD_CDC_FLOWCONTROL_NONE (0) | |
#define USBD_CDC_FLOWCONTROL_RTS (1) | |
#define USBD_CDC_FLOWCONTROL_CTS (2) | |
typedef struct _usbd_cdc_itf_t { | |
usbd_cdc_state_t base; // state for the base CDC layer | |
uint8_t rx_packet_buf[CDC_DATA_MAX_PACKET_SIZE]; // received data from USB OUT endpoint is stored in this buffer | |
uint8_t rx_user_buf[MICROPY_HW_USB_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 rx_buf_full; // rx from host will be blocked while this is true | |
uint8_t tx_buf[MICROPY_HW_USB_CDC_TX_DATA_SIZE]; // data for USB IN endpoind is stored in this buffer | |
uint16_t tx_buf_ptr_in; // increment this pointer modulo MICROPY_HW_USB_CDC_TX_DATA_SIZE when new data is available | |
volatile uint16_t tx_buf_ptr_out; // increment this pointer modulo MICROPY_HW_USB_CDC_TX_DATA_SIZE when data is drained | |
uint16_t tx_buf_ptr_out_next; // next position of above once transmission finished | |
uint8_t tx_need_empty_packet; // used to flush the USB IN endpoint if the last packet was exactly the endpoint packet size | |
uint8_t cdc_idx; // between 0 and MICROPY_HW_USB_CDC_NUM-1 | |
volatile uint8_t connect_state; // indicates if we are connected | |
uint8_t attached_to_repl; // indicates if interface is connected to REPL | |
uint8_t flow; // USBD_CDC_FLOWCONTROL_* setting flags | |
uint32_t bitrate; | |
} usbd_cdc_itf_t; | |
// This is implemented in usb.c | |
usbd_cdc_itf_t *usb_vcp_get(int idx); | |
static inline int usbd_cdc_is_connected(usbd_cdc_itf_t *cdc) { | |
return cdc->connect_state == USBD_CDC_CONNECT_STATE_CONNECTED; | |
} | |
int usbd_cdc_tx_half_empty(usbd_cdc_itf_t *cdc); | |
int usbd_cdc_tx_flow(usbd_cdc_itf_t *cdc, const uint8_t *buf, uint32_t len); | |
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); | |
void usbd_cdc_rx_event_callback(usbd_cdc_itf_t *cdc); | |
#endif // MICROPY_INCLUDED_STM32_USBD_CDC_INTERFACE_H |