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| Author |
Message |
art
Joined: 21 May 2015
Posts: 181
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| TIMER problem |
 Posted: Mon Jun 05, 2017 2:33 am |
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Hi,
I would like to calculate time before push button B6.
My problem is when i push button B6 it will not give actual time in second.
Please help to solve this problem
| Code: |
#include <18F4550.h>
#DEVICE ADC=10
#fuses HSPLL,NOWDT,PROTECT,NOLVP,NODEBUG,USBDIV,PLL5,CPUDIV1,VREGEN
#use delay(clock=48000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7,ERRORS)
#include <string.h>
#include <input.c>
#include <stdio.h>
#include <stdlib.h>
#include <usb_cdc.h>
#define INTS_PER_SECOND 91 // (48000000/(4*2*65536))
int8 v; // A running seconds counter
int8 int_count; // Number of interrupts left before a second has elapsed
#INT_RTCC // This function is called every time
void clock_isr() { // timer 1 overflows (65535->0), which is
// approximately 91 times per second for
if(--int_count==0) { // this program.
++v;
int_count = INTS_PER_SECOND;
}
}
void main()
{
char c;
unsigned char d;
unsigned char key;
usb_init_cs();
while (TRUE)
{
usb_task();
if (usb_cdc_kbhit())
{
c=usb_cdc_getc();
if (c=='\n') {putc('\r'); putc('\n');}
if (c=='\r') {putc('\r'); putc('\n');}
while(true)
{
ART:
d = usb_cdc_getc();
if(d=='C') // push C
{
while (key!=32) // push SPACE BAR to stop
{
if(usb_cdc_kbhit())
{key=usb_cdc_getc();}
{
{
setup_timer_0(RTCC_DIV_2|RTCC_INTERNAL);
set_timer0(0);
enable_interrupts(INT_RTCC);
enable_interrupts(GLOBAL);
{
int_count = INTS_PER_SECOND;
v = 0;
while(input(PIN_B6)); //Push Button B6
{
v=get_timer0();
printf(usb_cdc_putc,"%u seconds\r", v);
}
}
}
}
} key=0; // to initialize 'key' not as SPACE BAR
}
}
}
}
}
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alan
Joined: 12 Nov 2012
Posts: 357
Location: South Africa
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| Posted: Mon Jun 05, 2017 4:43 am |
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| Code: | | v=get_timer0(); ??????????? |
Are you sure. Doesn't v already contains the second value you are looking for. |
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art
Joined: 21 May 2015
Posts: 181
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| Posted: Mon Jun 05, 2017 7:03 pm |
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Hi alan,
Thanks, you are right ! |
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