Precise square waves of various duty cycles and pulses of varying widths can be generated on MINI-MAX/51 boards using the delay() function of Micro C and port setbit() and clrbit() functions. This example demonstrates a square wave ( equal on and off times ) with 100 millisecond period on port P1.3 of 8051.
Toolkit:Micro C 8051 Development System
Location:\bipom\devtools\MicroC\Examples\8051\medium\bit
void main() { serinit(19200>>1); printf ("Toggling P1.3"); // Loop forever, generating a square wave on P1.3 of 8051 for(;;) { clrbit(P1.3); delay(100); setbit(P1.3); delay(100); } }