diff --git a/examples/device/nrf52840/segger/nrf52840.emSession b/examples/device/nrf52840/segger/nrf52840.emSession
deleted file mode 100644
index c508e0c68..000000000
--- a/examples/device/nrf52840/segger/nrf52840.emSession
+++ /dev/null
@@ -1,98 +0,0 @@
-<!DOCTYPE CrossStudio_Session_File>
-<session>
- <Bookmarks/>
- <Breakpoints groups="Breakpoints" active_group="Breakpoints">
-  <BreakpointListItem trigger="" line="253" counter="0" hardwareBreakpoint="" isFunctionBreakpoint="false" action="" expression="" group="Breakpoints" type="Breakpoint" state="2" filename="../../../../hw/mcu/nordic/nrf52/tusb_port/dcd_nrf52.c" useHWbreakpoint="false"/>
-  <BreakpointListItem trigger="" line="286" counter="0" hardwareBreakpoint="" isFunctionBreakpoint="false" action="" expression="" group="Breakpoints" type="Breakpoint" state="4" filename="../../../../hw/mcu/nordic/nrf52/tusb_port/dcd_nrf52.c" useHWbreakpoint="false"/>
-  <BreakpointListItem trigger="" line="354" counter="0" hardwareBreakpoint="" isFunctionBreakpoint="false" action="" expression="" group="Breakpoints" type="Breakpoint" state="2" filename="../../../../hw/mcu/nordic/nrf52/tusb_port/dcd_nrf52.c" useHWbreakpoint="false"/>
-  <BreakpointListItem trigger="" line="67" counter="0" hardwareBreakpoint="" isFunctionBreakpoint="false" action="" expression="" group="Breakpoints" type="Breakpoint" state="2" filename="../../../../hw/mcu/nordic/nrf52/tusb_port/dcd_nrf52.c" useHWbreakpoint="false"/>
- </Breakpoints>
- <ExecutionProfileWindow/>
- <FrameBufferWindow>
-  <FrameBufferWindow bufferHeight="-1" addressSpace="" addressText="" bufferWidth="-1"/>
- </FrameBufferWindow>
- <Memory1>
-  <MemoryWindow addressSpace="" dataSize="1" autoEvaluate="0" viewMode="0" addressOrder="0" columnsText="" refreshPeriod="0" name="device_virtual_com" radix="16" sizeText="" addressText=""/>
-  <MemoryWindow addressSpace="" dataSize="1" autoEvaluate="0" viewMode="0" addressOrder="0" columnsText="" refreshPeriod="0" name="nrf52840" radix="16" sizeText="" addressText=""/>
- </Memory1>
- <Memory2>
-  <MemoryWindow addressSpace="" dataSize="1" autoEvaluate="0" viewMode="0" addressOrder="0" columnsText="" refreshPeriod="0" name="device_virtual_com" radix="16" sizeText="" addressText=""/>
-  <MemoryWindow addressSpace="" dataSize="1" autoEvaluate="0" viewMode="0" addressOrder="0" columnsText="" refreshPeriod="0" name="nrf52840" radix="16" sizeText="" addressText=""/>
- </Memory2>
- <Memory3>
-  <MemoryWindow addressSpace="" dataSize="1" autoEvaluate="0" viewMode="0" addressOrder="0" columnsText="" refreshPeriod="0" name="device_virtual_com" radix="16" sizeText="" addressText=""/>
-  <MemoryWindow addressSpace="" dataSize="1" autoEvaluate="0" viewMode="0" addressOrder="0" columnsText="" refreshPeriod="0" name="nrf52840" radix="16" sizeText="" addressText=""/>
- </Memory3>
- <Memory4>
-  <MemoryWindow addressSpace="" dataSize="1" autoEvaluate="0" viewMode="0" addressOrder="0" columnsText="" refreshPeriod="0" name="device_virtual_com" radix="16" sizeText="" addressText=""/>
-  <MemoryWindow addressSpace="" dataSize="1" autoEvaluate="0" viewMode="0" addressOrder="0" columnsText="" refreshPeriod="0" name="nrf52840" radix="16" sizeText="" addressText=""/>
- </Memory4>
- <Project>
-  <ProjectSessionItem path="nrf52840"/>
-  <ProjectSessionItem path="nrf52840;nrf52840"/>
-  <ProjectSessionItem path="nrf52840;nrf52840;hw"/>
-  <ProjectSessionItem path="nrf52840;nrf52840;hw;mcu"/>
-  <ProjectSessionItem path="nrf52840;nrf52840;hw;mcu;nordic"/>
-  <ProjectSessionItem path="nrf52840;nrf52840;hw;mcu;nordic;nrf52"/>
-  <ProjectSessionItem path="nrf52840;nrf52840;hw;mcu;nordic;nrf52;sdk"/>
-  <ProjectSessionItem path="nrf52840;nrf52840;hw;mcu;nordic;nrf52;sdk;drivers_nrf"/>
-  <ProjectSessionItem path="nrf52840;nrf52840;hw;mcu;nordic;nrf52;sdk;drivers_nrf;clock"/>
-  <ProjectSessionItem path="nrf52840;nrf52840;hw;mcu;nordic;nrf52;sdk;drivers_nrf;hal"/>
-  <ProjectSessionItem path="nrf52840;nrf52840;hw;mcu;nordic;nrf52;sdk;drivers_nrf;usbd"/>
-  <ProjectSessionItem path="nrf52840;nrf52840;hw;mcu;nordic;nrf52;sdk;softdevice"/>
-  <ProjectSessionItem path="nrf52840;nrf52840;hw;mcu;nordic;nrf52;sdk;softdevice;common"/>
-  <ProjectSessionItem path="nrf52840;nrf52840;hw;mcu;nordic;nrf52;tusb_port"/>
-  <ProjectSessionItem path="nrf52840;nrf52840;src"/>
-  <ProjectSessionItem path="nrf52840;nrf52840;System Files"/>
-  <ProjectSessionItem path="nrf52840;nrf52840;tinyusb"/>
-  <ProjectSessionItem path="nrf52840;nrf52840;tinyusb;class"/>
-  <ProjectSessionItem path="nrf52840;nrf52840;tinyusb;class;cdc"/>
-  <ProjectSessionItem path="nrf52840;nrf52840;tinyusb;device"/>
- </Project>
- <Register1>
-  <RegisterWindow visibleNodes="CPU - Current Context/r0;CPU - Current Context/r1;CPU - Current Context/r2;CPU - Current Context/r3;CPU - Current Context/r4;CPU - Current Context/r5;CPU - Current Context/r6;CPU - Current Context/r7;CPU - Current Context/r8;CPU - Current Context/r9;CPU - Current Context/r10;CPU - Current Context/r11;CPU - Current Context/r12;CPU - Current Context/sp(r13);CPU - Current Context/lr(r14);CPU - Current Context/pc(r15);CPU - Current Context/apsr;CPU/r0;CPU/r1;CPU/r2;CPU/r3;CPU/r4;CPU/r5;CPU/r6;CPU/r7;CPU/r8;CPU/r9;CPU/r10;CPU/r11;CPU/r12;CPU/sp(r13);CPU/lr(r14);CPU/pc(r15);CPU/xpsr;CPU/msp;CPU/psp;CPU/cfbp" binaryNodes="" asciiNodes="" openNodes="CPU - Current Context" name="device_virtual_com" decimalNodes="" octalNodes="" unsignedNodes=""/>
-  <RegisterWindow visibleNodes="CPU - Current Context/r0;CPU - Current Context/r1;CPU - Current Context/r2;CPU - Current Context/r3;CPU - Current Context/r4;CPU - Current Context/r5;CPU - Current Context/r6;CPU - Current Context/r7;CPU - Current Context/r8;CPU - Current Context/r9;CPU - Current Context/r10;CPU - Current Context/r11;CPU - Current Context/r12;CPU - Current Context/sp(r13);CPU - Current Context/lr(r14);CPU - Current Context/pc(r15);CPU - Current Context/apsr;CPU/r0;CPU/r1;CPU/r2;CPU/r3;CPU/r4;CPU/r5;CPU/r6;CPU/r7;CPU/r8;CPU/r9;CPU/r10;CPU/r11;CPU/r12;CPU/sp(r13);CPU/lr(r14);CPU/pc(r15);CPU/xpsr;CPU/msp;CPU/psp;CPU/cfbp" binaryNodes="" asciiNodes="" openNodes="CPU - Current Context" name="nrf52840" decimalNodes="" octalNodes="" unsignedNodes=""/>
- </Register1>
- <Register2>
-  <RegisterWindow visibleNodes="CPU - Current Context/r0;CPU - Current Context/r1;CPU - Current Context/r2;CPU - Current Context/r3;CPU - Current Context/r4;CPU - Current Context/r5;CPU - Current Context/r6;CPU - Current Context/r7;CPU - Current Context/r8;CPU - Current Context/r9;CPU - Current Context/r10;CPU - Current Context/r11;CPU - Current Context/r12;CPU - Current Context/sp(r13);CPU - Current Context/lr(r14);CPU - Current Context/pc(r15);CPU - Current Context/apsr;CPU/r0;CPU/r1;CPU/r2;CPU/r3;CPU/r4;CPU/r5;CPU/r6;CPU/r7;CPU/r8;CPU/r9;CPU/r10;CPU/r11;CPU/r12;CPU/sp(r13);CPU/lr(r14);CPU/pc(r15);CPU/xpsr;CPU/msp;CPU/psp;CPU/cfbp" binaryNodes="" asciiNodes="" openNodes="CPU - Current Context" name="device_virtual_com" decimalNodes="" octalNodes="" unsignedNodes=""/>
-  <RegisterWindow visibleNodes="CPU - Current Context/r0;CPU - Current Context/r1;CPU - Current Context/r2;CPU - Current Context/r3;CPU - Current Context/r4;CPU - Current Context/r5;CPU - Current Context/r6;CPU - Current Context/r7;CPU - Current Context/r8;CPU - Current Context/r9;CPU - Current Context/r10;CPU - Current Context/r11;CPU - Current Context/r12;CPU - Current Context/sp(r13);CPU - Current Context/lr(r14);CPU - Current Context/pc(r15);CPU - Current Context/apsr;CPU/r0;CPU/r1;CPU/r2;CPU/r3;CPU/r4;CPU/r5;CPU/r6;CPU/r7;CPU/r8;CPU/r9;CPU/r10;CPU/r11;CPU/r12;CPU/sp(r13);CPU/lr(r14);CPU/pc(r15);CPU/xpsr;CPU/msp;CPU/psp;CPU/cfbp" binaryNodes="" asciiNodes="" openNodes="CPU - Current Context" name="nrf52840" decimalNodes="" octalNodes="" unsignedNodes=""/>
- </Register2>
- <Register3>
-  <RegisterWindow visibleNodes="CPU - Current Context/r0;CPU - Current Context/r1;CPU - Current Context/r2;CPU - Current Context/r3;CPU - Current Context/r4;CPU - Current Context/r5;CPU - Current Context/r6;CPU - Current Context/r7;CPU - Current Context/r8;CPU - Current Context/r9;CPU - Current Context/r10;CPU - Current Context/r11;CPU - Current Context/r12;CPU - Current Context/sp(r13);CPU - Current Context/lr(r14);CPU - Current Context/pc(r15);CPU - Current Context/apsr;CPU/r0;CPU/r1;CPU/r2;CPU/r3;CPU/r4;CPU/r5;CPU/r6;CPU/r7;CPU/r8;CPU/r9;CPU/r10;CPU/r11;CPU/r12;CPU/sp(r13);CPU/lr(r14);CPU/pc(r15);CPU/xpsr;CPU/msp;CPU/psp;CPU/cfbp" binaryNodes="" asciiNodes="" openNodes="CPU - Current Context" name="device_virtual_com" decimalNodes="" octalNodes="" unsignedNodes=""/>
-  <RegisterWindow visibleNodes="CPU - Current Context/r0;CPU - Current Context/r1;CPU - Current Context/r2;CPU - Current Context/r3;CPU - Current Context/r4;CPU - Current Context/r5;CPU - Current Context/r6;CPU - Current Context/r7;CPU - Current Context/r8;CPU - Current Context/r9;CPU - Current Context/r10;CPU - Current Context/r11;CPU - Current Context/r12;CPU - Current Context/sp(r13);CPU - Current Context/lr(r14);CPU - Current Context/pc(r15);CPU - Current Context/apsr;CPU/r0;CPU/r1;CPU/r2;CPU/r3;CPU/r4;CPU/r5;CPU/r6;CPU/r7;CPU/r8;CPU/r9;CPU/r10;CPU/r11;CPU/r12;CPU/sp(r13);CPU/lr(r14);CPU/pc(r15);CPU/xpsr;CPU/msp;CPU/psp;CPU/cfbp" binaryNodes="" asciiNodes="" openNodes="CPU - Current Context" name="nrf52840" decimalNodes="" octalNodes="" unsignedNodes=""/>
- </Register3>
- <Register4>
-  <RegisterWindow visibleNodes="CPU - Current Context/r0;CPU - Current Context/r1;CPU - Current Context/r2;CPU - Current Context/r3;CPU - Current Context/r4;CPU - Current Context/r5;CPU - Current Context/r6;CPU - Current Context/r7;CPU - Current Context/r8;CPU - Current Context/r9;CPU - Current Context/r10;CPU - Current Context/r11;CPU - Current Context/r12;CPU - Current Context/sp(r13);CPU - Current Context/lr(r14);CPU - Current Context/pc(r15);CPU - Current Context/apsr;CPU/r0;CPU/r1;CPU/r2;CPU/r3;CPU/r4;CPU/r5;CPU/r6;CPU/r7;CPU/r8;CPU/r9;CPU/r10;CPU/r11;CPU/r12;CPU/sp(r13);CPU/lr(r14);CPU/pc(r15);CPU/xpsr;CPU/msp;CPU/psp;CPU/cfbp" binaryNodes="" asciiNodes="" openNodes="CPU - Current Context" name="device_virtual_com" decimalNodes="" octalNodes="" unsignedNodes=""/>
-  <RegisterWindow visibleNodes="CPU - Current Context/r0;CPU - Current Context/r1;CPU - Current Context/r2;CPU - Current Context/r3;CPU - Current Context/r4;CPU - Current Context/r5;CPU - Current Context/r6;CPU - Current Context/r7;CPU - Current Context/r8;CPU - Current Context/r9;CPU - Current Context/r10;CPU - Current Context/r11;CPU - Current Context/r12;CPU - Current Context/sp(r13);CPU - Current Context/lr(r14);CPU - Current Context/pc(r15);CPU - Current Context/apsr;CPU/r0;CPU/r1;CPU/r2;CPU/r3;CPU/r4;CPU/r5;CPU/r6;CPU/r7;CPU/r8;CPU/r9;CPU/r10;CPU/r11;CPU/r12;CPU/sp(r13);CPU/lr(r14);CPU/pc(r15);CPU/xpsr;CPU/msp;CPU/psp;CPU/cfbp" binaryNodes="" asciiNodes="" openNodes="CPU - Current Context" name="nrf52840" decimalNodes="" octalNodes="" unsignedNodes=""/>
- </Register4>
- <TraceWindow>
-  <Trace enabled="Yes"/>
- </TraceWindow>
- <Watch1>
-  <Watches active="1" update="Never"/>
- </Watch1>
- <Watch2>
-  <Watches active="0" update="Never"/>
- </Watch2>
- <Watch3>
-  <Watches active="0" update="Never"/>
- </Watch3>
- <Watch4>
-  <Watches active="0" update="Never"/>
- </Watch4>
- <Files>
-  <SessionOpenFile windowGroup="DockEditLeft" x="0" y="59" useTextEdit="1" useBinaryEdit="0" left="0" path="../../../../hw/bsp/pca10056/board_pca10056.c" debugPath="../../../../hw/bsp/pca10056/board_pca10056.c" selected="0" top="54" codecName="Default"/>
-  <SessionOpenFile windowGroup="DockEditLeft" x="0" y="290" useTextEdit="1" useBinaryEdit="0" left="0" path="../../../../hw/mcu/nordic/nrf52/sdk/sdk_config.h" debugPath="../../../../hw/mcu/nordic/nrf52/sdk/sdk_config.h" selected="0" top="281" codecName="Default"/>
-  <SessionOpenFile windowGroup="DockEditLeft" x="0" y="61" useTextEdit="1" useBinaryEdit="0" left="0" path="../src/main.c" debugPath="../src/main.c" selected="0" top="56" codecName="Default"/>
-  <SessionOpenFile windowGroup="DockEditLeft" x="0" y="16" useTextEdit="1" useBinaryEdit="0" left="0" path="../src/tusb_descriptors.c" debugPath="../src/tusb_descriptors.c" selected="0" top="0" codecName="Default"/>
-  <SessionOpenFile windowGroup="DockEditLeft" x="0" y="142" useTextEdit="1" useBinaryEdit="0" left="0" path="../../../../tinyusb/class/cdc/cdc_device.c" debugPath="../../../../tinyusb/class/cdc/cdc_device.c" selected="0" top="123" codecName="Default"/>
-  <SessionOpenFile windowGroup="DockEditLeft" x="31" y="254" useTextEdit="1" useBinaryEdit="0" left="0" path="../../../../hw/mcu/nordic/nrf52/tusb_port/dcd_nrf52.c" debugPath="../../../../hw/mcu/nordic/nrf52/tusb_port/dcd_nrf52.c" selected="0" top="60" codecName="Default"/>
-  <SessionOpenFile windowGroup="DockEditLeft" x="0" y="141" useTextEdit="1" useBinaryEdit="0" left="0" path="../../../../hw/mcu/nordic/nrf52/sdk/drivers_nrf/usbd/nrf_drv_usbd_errata.h" debugPath="../../../../hw/mcu/nordic/nrf52/sdk/drivers_nrf/usbd/nrf_drv_usbd_errata.h" selected="0" top="141" codecName="Default"/>
-  <SessionOpenFile windowGroup="DockEditLeft" x="0" y="373" useTextEdit="1" useBinaryEdit="0" left="0" path="../../../../hw/mcu/nordic/nrf52/sdk/drivers_nrf/hal/nrf_clock.h" debugPath="../../../../hw/mcu/nordic/nrf52/sdk/drivers_nrf/hal/nrf_clock.h" selected="0" top="352" codecName="Default"/>
-  <SessionOpenFile windowGroup="DockEditLeft" x="0" y="369" useTextEdit="1" useBinaryEdit="0" left="0" path="../../../../hw/mcu/nordic/nrf52/sdk/drivers_nrf/clock/nrf_drv_clock.c" debugPath="../../../../hw/mcu/nordic/nrf52/sdk/drivers_nrf/clock/nrf_drv_clock.c" selected="0" top="348" codecName="Default"/>
-  <SessionOpenFile windowGroup="DockEditLeft" x="0" y="39" useTextEdit="1" useBinaryEdit="0" left="0" path="ses_nrf52840_Vectors.s" debugPath="ses_nrf52840_Vectors.s" selected="0" top="18" codecName="Default"/>
-  <SessionOpenFile windowGroup="DockEditLeft" x="3" y="23" useTextEdit="1" useBinaryEdit="0" left="0" path="../../../../hw/mcu/nordic/nrf52/sdk/softdevice/common/nrf_sdh_freertos.c" debugPath="../../../../hw/mcu/nordic/nrf52/sdk/softdevice/common/nrf_sdh_freertos.c" selected="0" top="10" codecName="Default"/>
-  <SessionOpenFile windowGroup="DockEditLeft" x="0" y="1516" useTextEdit="1" useBinaryEdit="0" left="0" path="../../../../hw/mcu/nordic/nrf52/sdk/drivers_nrf/usbd/nrf_drv_usbd.c" debugPath="../../../../hw/mcu/nordic/nrf52/sdk/drivers_nrf/usbd/nrf_drv_usbd.c" selected="1" top="1483" codecName="Default"/>
- </Files>
- <ARMCrossStudioWindow activeProject="nrf52840" fileDialogDefaultFilter="*.c" autoConnectTarget="J-Link" buildConfiguration="Debug" debugSearchFileMap="" fileDialogInitialDirectory="/home/hathach/Dropbox/tinyusb/workspace/tinyusb/hw/mcu/nordic/nrf52/tusb_port" debugSearchPath="" autoConnectCapabilities="3199"/>
-</session>