Merge pull request #11074 from bergzand/pr/usb/nrfusb

nrf52: Add USB peripheral driver

boards/common/particle-mesh/Makefile.features

@@ -2,6 +2,7 @@
 FEATURES_PROVIDED += periph_i2c
 FEATURES_PROVIDED += periph_spi
 FEATURES_PROVIDED += periph_uart
+FEATURES_PROVIDED += periph_usbdev
 
 # Various other features (if any)
 FEATURES_PROVIDED += radio_nrf802154

boards/nrf52840-mdk/Makefile.features

@@ -1,7 +1,8 @@
 # Put defined MCU peripherals here (in alphabetical order)
+FEATURES_PROVIDED += periph_i2c
 FEATURES_PROVIDED += periph_spi
 FEATURES_PROVIDED += periph_uart
-FEATURES_PROVIDED += periph_i2c
+FEATURES_PROVIDED += periph_usbdev
 
 # Various other features (if any)
 FEATURES_PROVIDED += radio_nrf802154

boards/nrf52840dk/Makefile.features

@@ -3,3 +3,4 @@ include $(RIOTBOARD)/common/nrf52xxxdk/Makefile.features
 # Various other features (if any)
 FEATURES_PROVIDED += radio_nrf802154
 FEATURES_PROVIDED += periph_pwm
+FEATURES_PROVIDED += periph_usbdev

boards/reel/Makefile.features

@@ -2,5 +2,6 @@
 FEATURES_PROVIDED += periph_i2c
 FEATURES_PROVIDED += periph_spi
 FEATURES_PROVIDED += periph_uart
+FEATURES_PROVIDED += periph_usbdev
 
 include $(RIOTBOARD)/common/nrf52/Makefile.features

cpu/nrf52/include/nrfusb.h

@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2019 Koen Zandberg
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @defgroup    cpu_nrf52_nrfusb NRF usb peripheral implementation
+ * @ingroup     cpu_nrf52
+ * @brief       Minimal driver for the NRF52840 usb peripheral
+ *
+ * @{
+ *
+ * @file
+ * @brief       USB interface functions for the nrf52840 class devices
+ *
+ * @author      Koen Zandberg <koen@bergzand.net>
+ */
+
+#ifndef NRFUSB_H
+#define NRFUSB_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include "periph/usbdev.h"
+#include "cpu.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Number of USB peripherals on the MCU
+ */
+#define NRF_USB_NUM_PERIPH 1
+
+/**
+ * USB endpoint buffer space
+ */
+#define NRF_USB_BUF_SPACE   USBDEV_EP_BUF_SPACE
+
+/**
+ * Number of USB IN and OUT endpoints
+ */
+#define NRF_USB_NUM_EP      USBDEV_NUM_ENDPOINTS
+
+/**
+ * @brief nrfusb setup packet state tracker for endpoint 0 handling
+ */
+typedef enum {
+    NRFUSB_SETUP_READY,     /**< Ready for a new setup request        */
+    NRFUSB_SETUP_READ,      /**< Read request received                */
+    NRFUSB_SETUP_WRITE,     /**< Write request received               */
+    NRFUSB_SETUP_ACKOUT,    /**< Expecting an ACK on the out endpoint */
+    NRFUSB_SETUP_ACKIN,     /**< Expecting an ACK on the in endpoint  */
+} nrfusb_setup_state_t;
+
+/**
+ * @brief nrf usb peripheral device context
+ */
+typedef struct {
+    usbdev_t usbdev;                        /**< Inherited usbdev struct        */
+    usbdev_ep_t ep_ins[NRF_USB_NUM_EP];     /**< IN type endpoints              */
+    usbdev_ep_t ep_outs[ NRF_USB_NUM_EP];   /**< OUT type endpoints             */
+    NRF_USBD_Type *device;                  /**< Ptr to the device registers    */
+    size_t used;                            /**< Number of bytes from the
+                                                 buffer that are used           */
+    uint8_t buffer[NRF_USB_BUF_SPACE];      /**< Buffer space for endpoint data */
+    nrfusb_setup_state_t sstate;            /**< Setup request state machine    */
+} nrfusb_t;
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* NRFUSB_H */
+/** @} */