update readme

Makefile

@@ -86,8 +86,7 @@ remduplicates = $(strip $(if $1,$(firstword $1) $(call remduplicates,$(filter-ou
 #*********************************
 ifeq ($(BOARD),)
   $(info You must provide a BOARD parameter with 'BOARD=')
-  $(info Possible values are:)
-  $(info $(sort $(subst .h,,$(subst src/boards/,,$(wildcard src/boards/*)))))
+  $(info Supported boards are: $(sort $(subst .h,,$(subst src/boards/,,$(wildcard src/boards/*)))))
   $(error BOARD not defined)
 else
   ifeq ($(wildcard src/boards/$(BOARD).h),)

README.md

@@ -1,25 +1,61 @@
-# Adafruit nRF52840 Bootloader
+# Adafruit Bluefruit nRF52 Bootloader
 
-This repository contains the USB bootloader for Adafruit nRF52840 boards (1MB
-flash, 256KB SRAM). This repository depend on  [tinyusb](https://github.com/hathach/tinyusb/tree/develop) as submodule. After
-cloning this repo you need to run the following command:
+This repository contains the bootloader for Adafruit nRF52 series board
 
+- [Bluefruit Feather nRF52832](https://www.adafruit.com/product/3406)
+- Bluefruit Feather nRF52840
+
+## Features
+
+### nRF52832
+
+- DFU over Serial and OTA ( Application, Bootloader+SD )
+- DFU auto start to work with Arduino DTR auto-reset
+
+### nRF52840
+
+- DFU over USB CDC and OTA ( Application, Bootloader+SD )
+- DFU using USB Flashing Format a.k.a [UF2](https://github.com/Microsoft/uf2) (Applicatoin only)
+
+
+## Compile
+
+This repository depend on following submodule
+
+- [tinyusb](https://github.com/hathach/tinyusb/tree/develop)
+- [nrfx](https://github.com/NordicSemiconductor/nrfx)
+
+Get the code with following command:
+
+	git clone <URL>.git Adafruit_nRF52_Bootloader
+    cd Adafruit_nRF52_Bootloader
     git submodule update --init
 
-## Option 1: Build with makefile
+### Option 1: Build with makefile
 
-Navigate to `src/singlebank` (recommended) or `src/dualbank` (work in progress),
-and use feather52840 target for building bootloader.
+Prerequisite
 
-	make feather52840
+- ARM GCC
+- Nordic's [nRF5x Command Line Tools](http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.tools%2Fdita%2Ftools%2Fnrf5x_command_line_tools%2Fnrf5x_installation.html)
 
-To flash bootloader + S140
+To build
 
-	make flash_feather52840
+	$ make BOARD=feather52840 all
 
-To only flash S140
+To flash bootloader
 
-	make flash_sd
+	$ make BOARD=feather52840 flash
+
+To flash SoftDevice (with full chip erase)
+
+	$ make BOARD=feather52840 sd
+
+For the list of supported boards, try to type make without `BOARD=`
+
+	$ make
+	You must provide a BOARD parameter with 'BOARD='
+	Supported boards are: feather52832 feather52840 pca10056
+	Makefile:90: *** BOARD not defined.  Stop
 
 ### Common makefile problems
 
@@ -27,24 +63,22 @@ To only flash S140
 
 If you get the following error ...
 
-    $ make feather52840
-    Compiling file: dfu_single_bank.c
+    $ make BOARD=feather52840 all
+    Compiling file: main.c
     /bin/sh: /usr/bin/arm-none-eabi-gcc: No such file or directory
-    make: *** [_build/dfu_single_bank.o] Error 127
+    make: *** [_build/main.o] Error 127
 
-... you may need to edit the `Makefile` (for example `src/singlebank/Makefile`),
-and update the `GNU_INSTALL_ROOT` to point to the root path of your GCC ARM
-toolchain.
+... you may need to edit the `Makefile` and update the `GNU_INSTALL_ROOT` to point to the root path of your GCC ARM toolchain.
 
 #### 2. `mergehex: No such file or directory`
 
 Make sure that `mergehex` is available from the command-line. This binary is
-part of of Nordic's [nRF5x Command Line Tools](http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.tools%2Fdita%2Ftools%2Fnrf5x_command_line_tools%2Fnrf5x_installation.html).
+part of of Nordic's nRF5x Command Line Tools
 
 #### 3. `make: nrfjprog: No such file or directory`
 
 Make sure that `nrfjprog` is available from the command-line. This binary is
-part of of Nordic's [nRF5x Command Line Tools](http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.tools%2Fdita%2Ftools%2Fnrf5x_command_line_tools%2Fnrf5x_installation.html).
+part of of Nordic's nRF5x Command Line Tools.
 
 On POSIX-type systems you can temporarily add the path to `nrfjprog` via a
 variation on the following command:

src/segger/nrf52840_bootloader.emProject

@@ -18,7 +18,7 @@
       arm_target_debug_interface_type="ADIv5"
       arm_target_device_name="nRF52840_xxAA"
       arm_target_interface_type="SWD"
-      c_preprocessor_definitions="NRF52840_XXAA;__nRF_FAMILY;ARM_MATH_CM4;FLASH_PLACEMENT=1;NO_VTOR_CONFIG;BOARD_PCA10056;BOOTLOADER_VERSION=0x06000001;MK_DIS_FIRMWARE="S140 6.0.0, 6.0.0";S140;CONFIG_GPIO_AS_PINRESET;BLE_STACK_SUPPORT_REQD;SWI_DISABLE0;SOFTDEVICE_PRESENT;FLOAT_ABI_HARD"
+      c_preprocessor_definitions="NRF52840_XXAA;__nRF_FAMILY;ARM_MATH_CM4;FLASH_PLACEMENT=1;NO_VTOR_CONFIG;BOARD_PCA10056;MK_BOOTLOADER_VERSION=0x06000001;MK_DIS_FIRMWARE="S140 6.0.0, 6.0.0";S140;CONFIG_GPIO_AS_PINRESET;BLE_STACK_SUPPORT_REQD;SWI_DISABLE0;SOFTDEVICE_PRESENT;FLOAT_ABI_HARD"
       c_user_include_directories="../;../usb;$(TusbDir);$(SdDir)/s140/headers;$(SdDir)/s140/headers/nrf52;$(Sdk11Dir)/drivers_nrf/pstorage;$(Sdk11Dir)/ble/common/;$(Sdk11Dir)/ble/ble_services/ble_dfu;$(Sdk11Dir)/ble/ble_services/ble_dis;$(Sdk11Dir)/libraries/bootloader_dfu;$(Sdk11Dir)/libraries/bootloader_dfu/hci_transport;$(Sdk11Dir)/libraries/util;$(SdkDir)/toolchain/cmsis/include;$(SdkDir)/device;$(SdkDir)/toolchain;$(SdkDir)/drivers_nrf/hal;$(SdkDir)/drivers_nrf/systick;$(SdkDir)/drivers_nrf/uart;$(SdkDir)/drivers_nrf/usbd;$(SdkDir)/drivers_nrf/common;$(SdkDir)/drivers_nrf/delay;$(SdkDir)/drivers_nrf/power;$(SdkDir)/drivers_nrf/clock;$(SdkDir)/libraries/util;$(SdkDir)/libraries/timer;$(SdkDir)/libraries/scheduler;$(SdkDir)/libraries/crc16;$(SdkDir)/libraries/util;$(SdkDir)/libraries/hci/config;$(SdkDir)/libraries/uart;$(SdkDir)/libraries/hci;$(SdkDir)/external/fprintf;$(SdkDir)/libraries/strerror;$(SdkDir)/libraries/atomic;$(SdkDir)/libraries/balloc;$(SdkDir)/libraries/experimental_log/src;$(SdkDir)/libraries/experimental_log;$(SdkDir)/libraries/experimental_section_vars;$(SdkDir)/libraries/experimental_memobj"
       debug_register_definition_file="$(ProjectDir)/nrf52840_Registers.xml"
       debug_target_connection="J-Link"