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a small vhdl problem

s_hlu s_hlu is offline
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Join Date: Sep 2008
Location: Germany
Posts: 1
I am new to vhdl, now met a problem and dont know how to solve..
I am implementing somelike Bitwise Arbitration in can bus, now on my bus interface i have 2 ports, txd_o and rxd_i.(one for transmit, one for receive).
Now i wanna do something like : if(txd_o /= rxd_i) , then sth bla bla.. ----------Now so the problem is obviously that, synthesis says, Object txd_o of mode OUT cannot be read
So does anyone know, how to solve this ? Or has some more better ideas to implement this ? (Bitwise Arbitration need to compare the value this node sent and the value this node read )
Thanks a lot !

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jeppe jeppe is offline
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Join Date: Mar 2008
Location: Denmark
Posts: 348
Try to change OUT with INOUT - this will normally solve the problem
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