bhan1992
Member level 1
im trying to blink an led. the rate which it blink depends on the adc value. i have tested that the adc is working fine. but when i load this piece of code, the led just wont light up at all.
is there any other way of blinking the led depending on the adc value besides this rtos?
is there any other way of blinking the led depending on the adc value besides this rtos?
Code:
#include <p18f43k22.h>
#include <adc.h>
#include <delays.h>
#include <stdlib.h>
#include <timers.h>
#include <salvo.h>
#undef OSC
int result;
void slow_beep (void);
void medium_beep (void);
void fast_beep (void);
void isr (void);
_OSLabel (_slow_beep)
_OSLabel (_medium_beep)
_OSLabel (_fast_beep)
#pragma code high_vector = 0x08
void interrupt (void)
{
_asm goto isr _endasm
}
#pragma code
#pragma interrupt isr
void slow_beep (void)
{
while(result >= 250 && result < 600)
{
PORTBbits.RB5 = ~PORTBbits.RB5;
OS_Delay(65, _slow_beep); //0.65 seconds
}
}
void medium_beep (void)
{
while(result >= 600 && result < 850)
{
PORTBbits.RB5 = ~PORTBbits.RB5;
OS_Delay(45, _medium_beep); //0.45 seconds
}
}
void fast_beep (void)
{
while(result >= 850)
{
PORTBbits.RB5 = ~PORTBbits.RB5;
OS_Delay(25, _fast_beep); //0.25 seconds
}
}
void main (void)
{
TRISB = 0;
OSCreateTask(slow_beep, OSTCBP(1), 7);
OSCreateTask(medium_beep, OSTCBP(2), 7);
OSCreateTask(fast_beep, OSTCBP(3), 7);
OpenTimer0 (TIMER_INT_ON & T0_16BIT & T0_SOURCE_INT & T0_PS_1_1);
WriteTimer0(55536);
INTCONbits.GIE = 1;
OpenADC(ADC_FOSC_32 & ADC_RIGHT_JUST & ADC_2_TAD, ADC_REF_VDD_VSS, ADC_INT_OFF );
PORTB = 1; //initialisation 0.7 second beep
Delay10KTCYx(10);
PORTB = 0;
while(1)
{
SetChanADC(ADC_CH0);
ConvertADC();
while(BusyADC());
result = ReadADC();
OSSched();
OS_Delay(10,main) //delay 0.1 second
}
CloseADC();
}
void isr (void)
{
WriteTimer0(55536);
OSTimer(); //creating 0.01 second system tick
INTCONbits.TMR0IF = 0;
}