main() {
int i,value,min,max;
printf("Sampling:");
setup_port_a( ALL_ANALOG );
setup_adc( ADC_CLOCK_INTERNAL );
set_adc_channel( 0 );
do {
min=255;
max=0;
for(i=0; i<=30; ++i) {
delay_ms(100);
value = Read_ADC();
if(value<min)
min=value;
if(value>max)
max=value;
}
printf("\n\rMin: %2X Max: %2X\r\n",min,max);
} while (TRUE);
}
main() {
char selection;
byte value;
printf("\r\nFrequency:\r\n");
printf(" 1) 19.5 khz\r\n");
printf(" 2) 4.9 khz\r\n");
printf(" 3) 1.2 khz\r\n");
do {
selection=getc();
} while((selection<'1')||(selection>'3'));
setup_ccp1(CCP_PWM); // Configure CCP1 as a PWM
// The cycle time will be (1/clock)*4*t2div*(period+1)
// In this program clock=10000000 and period=127 (below)
// For the three possible selections the cycle time is:
// (1/10000000)*4*1*128 = 51.2 us or 19.5 khz
// (1/10000000)*4*4*128 = 204.8 us or 4.9 khz
// (1/10000000)*4*16*128= 819.2 us or 1.2 khz
switch(selection) {
case '1' : setup_timer_2(T2_DIV_BY_1, 127, 1);
break;
case '2' : setup_timer_2(T2_DIV_BY_4, 127, 1);
break;
case '3' : setup_timer_2(T2_DIV_BY_16, 127, 1);
break;
}
setup_port_a(ALL_ANALOG);
setup_adc(adc_clock_internal);
set_adc_channel( 0 );
printf("%c\r\n",selection);
while( TRUE ) {
value=read_adc();
printf("%2X\r",value);
set_pwm1_duty(value); // This sets the time the pulse is
// high each cycle. We use the A/D
// input to make a easy demo.
// the high time will be:
// if value is LONG INT:
// value*(1/clock)*t2div
// if value is INT:
// value*4*(1/clock)*t2div
// for example a value of 30 and t2div
// of 1 the high time is 12us
// WARNING: A value to high or low will
// prevent the output from
// changing.
}
}
void init()
{
// Inicializa puertos
set_tris_a(0b11111111);
set_tris_b(trisB_value);
// ***ADC***
setup_port_a(sAN0);
setup_adc(ADC_CLOCK_INTERNAL);
set_adc_channel(0);
setup_adc_ports(sAN0);
setup_vref(VREF_HIGH | 8);
// Seteo el Timer1 como fuente interna
setup_timer_1(T1_INTERNAL | T1_DIV_BY_8);
set_timer1(26786);
// Interrupcion sobre el Timer1
enable_interrupts(INT_TIMER1);
// Seteo el pin RB0 - Sensor de ultrasonido :)
ext_int_edge(L_TO_H);
enable_interrupts(INT_EXT);
// Habilito las interrupciones
enable_interrupts(GLOBAL);
// Variable para hacer el reset
reset = false;
// Apaga todos los sensores
sensor1 = SENSOR_OFF;
sensor2 = SENSOR_OFF;
sensor3 = SENSOR_OFF;
sensor4 = SENSOR_OFF;
sensor5 = SENSOR_OFF;
// Inicializa los valores
values[0] = 0x0000;
values[1] = 0x0000;
values[2] = 0x0000;
values[3] = 0x0000;
values[4] = 0x0000;
values[5] = 0x0000;
// Muestras iniciales
samples = SAMPLES_DEFAULT;
// Inicializa la mascara -> todos habilitados (0x3F)
sensorMask = DEFAULT_MASK;
//Determina el estado actual
state = STATE_FREE;
// Sin lectura temprana
readSensor = 0x00;
bufferedReadSensor = 0x00;
actalTO = 0x00;
requestFrom = 0x00;
bufferedFrom = 0x00;
actalCmd = 0x00;
requestCmd = 0x00;
bufferedCmd = 0x00;
alarmType = 0x00;
triggerAlarm = 0;
#if TRIGGER_TYPE == SWITCH_SENSOR
disable_interrupts(INT_EXT);
#endif
#if TRIGGER_TYPE == LED
// TRIGGER como escritura
bit_clear(trisB_value, 0);
set_tris_b(trisB_value);
#endif
return;
}
