====== delay ======
''void delay(u32 interval)''
| //interval// | Number of milliseconds to pause |
Pauses execution for interval milliseconds. Please be aware that the accuracy of this function may vary and should not be used in situations where precise timing is needed.
#include "moacon500.h"
void cmain(void)
{
portInit(2,0); //Initialize ports 20~27 for output
while(1) //Run forever
{
portOut(20,1); //Set port 20 High
delay(100); //Wait for 100ms
portOut(20,0); //Set port 20 Low
delay(100); //Wait for 100ms
}
}
To wait for times less than 1ms, or to achieve a higher precision, a "spin-wait" function can be used. The
CPU will spin in a loop for a specified number of iterations.
void spinWait(u32 countdown)
{
for (;countdown > 0; countdown--); //Loop until countdown reaches 0
}
Each iteration will consume a very small amount of time, so this method can be used to simulate a very
short delay, or a delay with higher precision.