changing stdio target ports

Technical discussions around xCORE processors (e.g. xcore-200 & xcore.ai).
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Gravis
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Joined: Thu Feb 02, 2012 3:32 pm

changing stdio target ports

Post by Gravis »

i have my own board and have used all the 1-bit ports so i would like to use a couple free 4 bit ports so that my stdio stuff like printf() and getc() still work. from what i can tell, you can alter the .XN file to use the ports you want but how does that apply to multibit ports? does output (e.g. printf) drive every bit on a 4-bit port? does input (e.g. getc) require every input pin to have matching values? finally, is the stdio protocol used UART? if not, what is it?

thanks.


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