[ECOS] questions about ecos hello world and gdb debug?

[wb ning]

hello,everyone. My questions are as follows
1)since my arm7 board don't have a screen at all. Does the printf
method print hello world to the UART, so i can see it use the
hyperterminal? Is the same with the redboot so? accept and echo
command on the uart?
2)when i want debug a image, should the redboot run first? or without
redboot i can also use gdb to debug?
3)if i burn the image to flash, and it startup there, can i use debug also?

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