added basic code

1 files changed, 123 insertions, 0 deletions

diff --git a/arduino/cores/nRF5/usb/usb.c b/arduino/cores/nRF5/usb/usb.c
new file mode 100755
index 0000000..e6ea31e
--- /dev/null
+++ b/arduino/cores/nRF5/usb/usb.c
@@ -0,0 +1,123 @@
+/**************************************************************************/
+/*!
+    @file     usb.c
+    @author   hathach (tinyusb.org)
+
+    @section LICENSE
+
+    Software License Agreement (BSD License)
+
+    Copyright (c) 2018, Adafruit Industries (adafruit.com)
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions are met:
+    1. Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+    3. Neither the name of the copyright holders nor the
+    names of its contributors may be used to endorse or promote products
+    derived from this software without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
+    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+/**************************************************************************/
+
+#ifdef NRF52840_XXAA
+
+#include "nrfx.h"
+#include "nrfx_power.h"
+#include "nrf_sdm.h"
+#include "nrf_soc.h"
+
+#include "nrf_usbd.h"
+#include "tusb.h"
+#include "usb.h"
+
+//--------------------------------------------------------------------+
+// MACRO TYPEDEF CONSTANT ENUM DECLARATION
+//--------------------------------------------------------------------+
+extern uint16_t usb_desc_str_serial[1+16];
+
+// Init usb when starting up. Softdevice is not enabled yet
+void usb_init(void)
+{
+  // Power module init
+  const nrfx_power_config_t pwr_cfg = { 0 };
+  nrfx_power_init(&pwr_cfg);
+
+  // Register tusb function as USB power handler
+  const nrfx_power_usbevt_config_t config = { .handler = (nrfx_power_usb_event_handler_t) tusb_hal_nrf_power_event };
+  nrfx_power_usbevt_init(&config);
+
+  nrfx_power_usbevt_enable();
+
+  // USB power may already be ready at this time -> no event generated
+  // We need to invoke the handler based on the status initially
+  uint32_t usb_reg = NRF_POWER->USBREGSTATUS;
+
+  if ( usb_reg & POWER_USBREGSTATUS_VBUSDETECT_Msk ) tusb_hal_nrf_power_event(NRFX_POWER_USB_EVT_DETECTED);
+  if ( usb_reg & POWER_USBREGSTATUS_OUTPUTRDY_Msk  ) tusb_hal_nrf_power_event(NRFX_POWER_USB_EVT_READY);
+
+  // Create Serial string descriptor
+  char tmp_serial[17];
+  sprintf(tmp_serial, "%08lX%08lX", NRF_FICR->DEVICEID[1], NRF_FICR->DEVICEID[0]);
+
+  for(uint8_t i=0; i<16; i++)
+  {
+    usb_desc_str_serial[1+i] = tmp_serial[i];
+  }
+
+  // Init tinyusb stack
+  tusb_init();
+}
+
+// Must be called before sd_softdevice_enable()
+// NRF_POWER is restricted prph used by Softdevice, must be release before enable SD
+void usb_softdevice_pre_enable(void)
+{
+  nrfx_power_usbevt_disable();
+  nrfx_power_usbevt_uninit();
+  nrfx_power_uninit();
+}
+
+// Must be called after sd_softdevice_enable()
+// To re-enable USB
+void usb_softdevice_post_enable(void)
+{
+  sd_power_usbdetected_enable(true);
+  sd_power_usbpwrrdy_enable(true);
+  sd_power_usbremoved_enable(true);
+}
+
+
+// Invoked when cdc when line state changed e.g connected/disconnected
+// Use to reset to DFU when disconnect with 1200 bps
+void tud_cdc_line_state_cb(uint8_t itf, bool dtr, bool rts)
+{
+  (void) itf;  // interface ID, not used
+
+  // DTR = false is counted as disconnected
+  if ( !dtr )
+  {
+    cdc_line_coding_t coding;
+    tud_cdc_get_line_coding(&coding);
+
+    if ( coding.bit_rate == 1200 ) enterSerialDfu();
+  }
+}
+
+
+
+#endif