Robert 
Hi, I bought a tiny210 development board, and I tried the following example using SD-Flasher: https://github.com/limingth/ARM-Codes/tree/master/tiny210-linux-codes/1-... but when I'm writing the binary file under Ubuntu, the same example not working: sudo dd iflag=dsync oflag=dsync if=sd-led.bin of=/dev/sdb seek=1 How can I write out the binary under Ubuntu? Thanks, Robert