Dear all:
I tried to boot L138 with UART, but failed, pls see the infomation below:
(Serial Port): Opening COM1 at 115200 baud...
(AIS Parse): Waiting for BOOTME... (power on or reset target now)
(AIS Parse): BOOTME received!
(Serial Port): Read error! (The operation has timed out.)
(AIS Parse): I/O Error in read!
(AIS Parse): Boot aborted.
(Serial Port): Closing COM1.
I only use UART_TXD and UART_RXD in my design, other pins of UART not used, is it ok? where is the problem, pls help me!