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Joseph Hebert
01/21/13 04:41
Read: 822 times
Okemah, Ok
United States


 
#189279 - Hardware
Responding to: Koen De Ganck's previous message
Write first 0xFF to port 2 before reading


That presumes that the value he must read from port 2 originates outside the microcontroller, an assumption that seems contradicted by the requirement that he write his result to port 2.

In any case, he clearly needs to better understand the hardware aspects of input/output.

Joe

List of 5 messages in thread
TopicAuthorDate
8051 QUESTION       JOHN TRINCE      01/20/13 13:07      
   Input/output      Joseph Hebert      01/20/13 13:35      
   quasi bidirectional ports      Koen De Ganck      01/20/13 13:41      
      Hardware      Joseph Hebert      01/21/13 04:41      
         8051 basics      Andy Neil      01/21/13 05:51      

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