ChangeLog:
20170323  v2.0.0  Compatible with B_Cut.
20170428  V2.0.1  (1) Reset flash status register before download.
                  (2) Verify checksum after download.
20170508  v2.0.2  Enable RSIP Function.
20170724  v2.0.3  (1) Fix other baudrate except 1.5Mbps can not download issue
                  (2) Add Security Boot image process function
20170815  v2.0.4  Add Offset and Len options to Security Boot
20170822  v2.1.0  Adjust Generate Tabpage. Generate Image_All.bin without inserting system data by default. Select system.bin if needed.
20170915  v2.2.0  (1) Build flash loader with ROM symbols, which is compatible with SMIC and UMC version.
                  (2) Add "Advanced Setting" functions to Download Tabpage, which makes users to be able to check and modify flash status registers.
                  (3) Modify Download Tabpage layout.
20180202  v2.2.1  Compatible with AmebaD Security Function.
20180306  v2.2.2  (1) Compatible with AmebaD Uart Download Function.
                  (2) User needs to select target chip before download or encrypt images.
                  (3) DataGridView is used to show images to be downloaded. The maximum number of images is not limited.
                      User can add more rows in DataGridVeiw if needed.
20180605  v2.2.3  (1) Compatible with AmebaD secure boot function(Start Offset fixed, Length: fixed to image size).
                  (2) AmebaD init baudrate set to 115200bps for UART Download.
                  (3) Close COM would throw exception when image download is ongoing. Fix it.
20180719  v2.2.4  (1) Fix checksum error when download image to 8MB flash
                  (2) Update AmebaD flashloader to fit ASIC
20180725  v2.2.5  (1) Show default download address for different chips
                  (2) Disable AllowUserAddRows function when download image.
20180727  v2.2.6  Add H/W power down enable function for AmebaD.
20180731  v2.2.7  Modify flash speed options for AmebaD.
20180820  v2.2.8  (1) Add support to Ameba-D RSIP mask function.
                  (2) Fix closing serial port causes exception issue.
                  (3) Fix checksum error in case of RSIP enable when download images to Ameba-D.
20180905  v2.2.9  (1) Add timeout mechanism for handshake in AmebaZ/D flashloader.
                  (2) Fix checksum error in case of RSIP enable when download images to Ameba-Z.
20181024  v2.2.10 (1) AmebaD flash layout adjustment.
                  (2) Enable datagridview column auto-size function.
                  (3) Modify OTA trigger pin for AmebaD
20181102  v2.2.11 (1) Enable image append to tail without offset in Generate.
                  (2) IMG3 download with IMG2 for AmebaD if use RDP. Do not download IMG3 independently.
20181226  v2.2.12 (1) Modify default download images to fit new memory layout.
                  (2) Update AmebaD flashloader to compatible with B-Cut.
20190110  v2.2.13 Sync xmodem code with 1-10 MP Image Tool.
20190424  v2.3.0  (1) Disable system data generae function for AmebaD
                  (2) Fix checksum error after more than 3MB image download
                  (3) Add IV input textbox for AmebaD RSIP encryption
20190529  v2.3.1  Add alternative baudrates for image download.
