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Is there a command (in C) that will apply to All ports?

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123testing

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8051 and C address Ports

I am trying to write a test program in "C" for the 8051.

1) set all P0 to output
2) All P0 lined high
3) Wait 2 secs
4) All P0 lines low
5) Wait 2 secs
6) Go to 2)

I want to address ALL P0 in one go. (I do not want to do P0.0, P0.0...).

Then in the body I want to set then high or low.

Is there a command (in C) that will apply to All ports?

Thank you.
 

8051 and C address Ports

In 8051 series You did not need to set I/O as input or output, it is do not have I/O control register like in AVR or Rabbit as i have tried. You just read from I/O or just set the I/O to Hi/Low.

All P0 High --> P0=0xFF;
All P0 Low --> P0=0x00;

what kind the compiler do you used?


Salam
Siswanto
 

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