Merge branch 'readme_update'

Announce Firmware Checksum Tool in the Readme

README.md

@@ -1,5 +1,9 @@
-Nitrokey Storage Firmware
-=========================
+# Nitrokey Storage Firmware
+
+## Firmware verification
+To verify firmware flashed on device, please use the Nitrokey Storage Firmware Checksum Tool from the [tools] directory.
+
+[tools]: https://github.com/Nitrokey/nitrokey-storage-firmware/tree/master/tools
 
 ## Building
 
@@ -30,6 +34,10 @@ Before flashing there may be a need to convert binary file to .hex. If it was no
 ```
 avr-objcopy -R .eeprom -O ihex USB_MASS.elf firmware.hex
 ```
+or, while in `./Debug` directory:
+```
+make firmware.hex
+```
 
 ## Flashing the Firmware to Device
 

tools/README.md

@@ -44,9 +44,10 @@ brew install srecord
 ```
 # download.hex - firmware file downloaded from device's site
 # firmware.bin - firmware file exported from the device
+# Assuming ./nkcompare.sh is in current directory
 
-# macOS only - get firmware files (example)
-# Copy exported firmware file from the Unencrypted Volume
+# Get firmware files (example)
+# Copy exported firmware file from the Unencrypted Volume (macOS only)
 cp /Volumes/Nitrokey/firmware.bin .
 # Download v0.53 firmware from the firmware releases
 curl -L -o download.hex https://github.com/Nitrokey/nitrokey-storage-firmware/releases/download/V0.53/storage-firmware-V0.53-0-g905976e.hex