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Delay.c
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Delay.c
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/*------------------------------------------------------------*-
Delay.C (v1.00)
-------------------------------------------------------------
Create a simple software delay using a loop.
-*------------------------------------------------------------*/
#include "Main.h"
#include "Port.h"
#include "Delay.h"
void DELAY_T0_ms(tWord N)
{
tWord ms;
// Configure Timer 0 as a 16-bit timer
TMOD &= 0xF0; // Clear all T0 bits (T1 left unchanged)
TMOD |= 0x01; // Set required T0 bits (T1 left unchanged)
ET0 = 0; // No interupts
// Delay value is *approximately* 1 ms per loop
for (ms = 0; ms < N; ms++)
{
TH0 = PRELOAD01H;
TL0 = PRELOAD01L;
TF0 = 0; // clear overflow flag
TR0 = 1; // start timer 0
while (TF0 == 0); // Loop until Timer 0 overflows (TF0 == 1)
TR0 = 0; // Stop Timer 0
}
}
void DELAY_T1_ms(tWord N)
{
tWord ms;
// Configure Timer 0 as a 16-bit timer
TMOD &= 0x0F; // Clear all T0 bits (T1 left unchanged)
TMOD |= 0x10; // Set required T0 bits (T1 left unchanged)
ET1 = 0; // No interupts
// Delay value is *approximately* 1 ms per loop
for (ms = 0; ms < N; ms++)
{
TH1 = PRELOAD01H;
TL1 = PRELOAD01L;
TF1 = 0; // clear overflow flag
TR1 = 1; // start timer 0
while (TF1 == 0); // Loop until Timer 0 overflows (TF0 == 1)
TR1 = 0; // Stop Timer 0
}
}
void DELAY_loop_ms(tWord ms)
{
tWord counter1;
tByte counter2;
for(counter1=0;counter1<ms;counter1++)
for( counter2 =0;counter2<250;counter2++);
}
void DELAY_loop_ns(tWord ns)
{
int counter;
for(counter=0;counter<ns;counter++);
}
/*------------------------------------------------------------*-
---- END OF FILE --------------------------------------------
-*------------------------------------------------------------*/