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The UartSecureDFU SDK failed to send the upgrading aplication.zip to 52832 in Linux system!

 Hi 

        I build the UartSecureDFU SDK to output a Window's EXE file, it send the upgrading aplication.zip to 52832 successfully in Window 7 System. But If build  the UartSecureDFU SDK to output a Linux binary file,It  failed to send the upgrading aplication.zip to 52832 in Linux system (Ubuntu 14.04)!

 I debugged,it enter the uart_drv_send method in uart_linux.c , and then It is waiting in the if (tcdrain(p_uart->tty_fd)) all the time。At the meanwhile ,The 52832 has no received any bytes.

Please help me analyse it!!!

Thanks

BestRegard!!

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