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79 lines
2.2 KiB
C
79 lines
2.2 KiB
C
/*
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* Copyright (C) 2019 Koen Zandberg
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @defgroup cpu_nrf52_nrfusb NRF usb peripheral implementation
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* @ingroup cpu_nrf52
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* @brief Minimal driver for the NRF52840 usb peripheral
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*
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* @{
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*
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* @file
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* @brief USB interface functions for the nrf52840 class devices
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*
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* @author Koen Zandberg <koen@bergzand.net>
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*/
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#ifndef NRFUSB_H
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#define NRFUSB_H
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#include <stdint.h>
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#include <stddef.h>
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#include "periph/usbdev.h"
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#include "cpu.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Number of USB peripherals on the MCU
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*/
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#define NRF_USB_NUM_PERIPH 1
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/**
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* USB endpoint buffer space
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*/
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#define NRF_USB_BUF_SPACE USBDEV_EP_BUF_SPACE
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/**
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* Number of USB IN and OUT endpoints
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*/
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#define NRF_USB_NUM_EP USBDEV_NUM_ENDPOINTS
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/**
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* @brief nrfusb setup packet state tracker for endpoint 0 handling
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*/
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typedef enum {
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NRFUSB_SETUP_READY, /**< Ready for a new setup request */
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NRFUSB_SETUP_READ, /**< Read request received */
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NRFUSB_SETUP_WRITE, /**< Write request received */
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NRFUSB_SETUP_ACKOUT, /**< Expecting an ACK on the out endpoint */
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NRFUSB_SETUP_ACKIN, /**< Expecting an ACK on the in endpoint */
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} nrfusb_setup_state_t;
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/**
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* @brief nrf usb peripheral device context
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*/
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typedef struct {
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usbdev_t usbdev; /**< Inherited usbdev struct */
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usbdev_ep_t ep_ins[NRF_USB_NUM_EP]; /**< IN type endpoints */
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usbdev_ep_t ep_outs[ NRF_USB_NUM_EP]; /**< OUT type endpoints */
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NRF_USBD_Type *device; /**< Ptr to the device registers */
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size_t used; /**< Number of bytes from the
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buffer that are used */
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uint8_t buffer[NRF_USB_BUF_SPACE]; /**< Buffer space for endpoint data */
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nrfusb_setup_state_t sstate; /**< Setup request state machine */
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} nrfusb_t;
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#ifdef __cplusplus
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}
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#endif
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#endif /* NRFUSB_H */
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/** @} */
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