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jacktaylor
Joined: 02 Sep 2017
Posts: 75
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| Program stopping in the delay () function |
 Posted: Wed Jul 04, 2018 8:40 am |
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Friends, good afternoon. Can anybody help me? I do not know why any timed line increased below the trigger(); prototype is not executed while looping (true). It looks like the program for in delay(). If you remove the delay, the loop is executed by executing the trigger(); is really very strange. Program stopping in the delay() function;
| Code: |
#include <16F877A.h>
#FUSES NOWDT, HS, PUT, NOPROTECT, NODEBUG, BROWNOUT, NOLVP, NOCPD, NOWRT
#use delay(clock= 20M)
//--->>>>>>>>>> O programa funciona sem estas diretivas fast_io nem tris_x
#use fast_io(c)
//*******COnecoes LCD*********
#define LCD_DB4 PIN_A4 // Pino bloco dados 4 no pino microcontrolador
#define LCD_DB5 PIN_A3
#define LCD_DB6 PIN_A2
#define LCD_DB7 PIN_A1
#define LCD_RS PIN_E0
#define LCD_E PIN_A5
#include <lcd4bitsMicrostronic.c>
#define trig PIN_C1
// --- Protótipo da Função Auxiliar ---
void trigger();
// --- Variáveis Globais ---
void main()
{
//Configura PORTS
SET_TRIS_C(0X04); // C2 configurado como entrada, pois é o ECHO DO SENSOR e CCP1 do PIC. C1 é TRIG do 16F877A para sensor, ENTAO SAIDA.
output_c(0x00);
Enable_Interrupts(GLOBAL);
DISABLE_INTERRUPTS(INT_TIMER1);
Enable_Interrupts(INT_CCP1 ); // USEI CCP1IE = 0x01; Habilita interrupção do periférico CCP
Setup_ccp1(CCP_CAPTURE_FE); // CCP1CON = 0x04; CONFIGURA BYTE BORDA SUBIDA NOREGISTADOR
Setup_Timer_1(T1_INTERNAL|T1_DIV_BY_2);
//Inicializa LCD
lcd_init();
lcd_putc("\f");
lcd_gotoxy(1,1); //lcd_gotoxy para coluna, linha
printf(lcd_putc,"distancia");
lcd_gotoxy(14,2); //lcd_gotoxy para coluna, linha
printf(lcd_putc,"cm");
delay_ms(100);
while(TRUE)
{
trigger(); //Chama a função de trigger
delay_ms(100); //lEITURA DO PULSO A CADA 100ms Taxa de atualização
} //end while
}// end void main
//TODO: User Code
void trigger()
{
output_high(trig); // trih = 0x01; trig em nível high
delay_us(10); //por 10 micro segundos
output_low(trig); //trig = 0x00;
} //end trigger |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19549
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| Posted: Wed Jul 04, 2018 9:06 am |
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| There is no sign of an interrupt handler for CCP1. The code will crash without this. |
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jacktaylor
Joined: 02 Sep 2017
Posts: 75
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| Posted: Wed Jul 04, 2018 9:59 am |
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| Ttelmah wrote: | | There is no sign of an interrupt handler for CCP1. The code will crash without this. |
Even commenting on all the configuration lines of the CCP1 module, the program is stopped in delay (); Commenting on the delay, the program executes the while (1) {trigger ();}
Note below.
Why is this happening?
| Code: |
#include <16F877A.h>
#FUSES NOWDT, HS, PUT, NOPROTECT, NODEBUG, BROWNOUT, NOLVP, NOCPD, NOWRT
#use delay(clock= 20M)
//--->>>>>>>>>> O programa funciona sem estas diretivas fast_io nem tris_x
#use fast_io(c)
//*******COnecoes LCD*********
#define LCD_DB4 PIN_A4 // Pino bloco dados 4 no pino microcontrolador
#define LCD_DB5 PIN_A3
#define LCD_DB6 PIN_A2
#define LCD_DB7 PIN_A1
#define LCD_RS PIN_E0
#define LCD_E PIN_A5
#include <lcd4bitsMicrostronic.c>
#define trig PIN_C1
// --- Protótipo da Função Auxiliar ---
void trigger();
// --- Variáveis Globais ---
void main()
{
//Configura PORTS
SET_TRIS_C(0X04); // C2 configurado como entrada, pois é o ECHO DO SENSOR e CCP1 do PIC. C1 é TRIG do 16F877A para sensor, ENTAO SAIDA.
output_c(0x00);
//!
//! Enable_Interrupts(GLOBAL);
//! DISABLE_INTERRUPTS(INT_TIMER1);
//! Enable_Interrupts(INT_CCP1 ); // USEI CCP1IE = 0x01; Habilita interrupção do periférico CCP
//! Setup_ccp1(CCP_CAPTURE_FE); // CCP1CON = 0x04; CONFIGURA BYTE BORDA SUBIDA NOREGISTADOR
//! Setup_Timer_1(T1_INTERNAL|T1_DIV_BY_2);
//!
//Inicializa LCD
//! lcd_init();
//! lcd_putc("\f");
//! lcd_gotoxy(1,1); //lcd_gotoxy para coluna, linha
//! printf(lcd_putc,"distancia");
//! lcd_gotoxy(14,2); //lcd_gotoxy para coluna, linha
//! printf(lcd_putc,"cm");
//! delay_ms(100);
while(TRUE)
{
trigger(); //Chama a função de trigger
delay_ms(100); //lEITURA DO PULSO A CADA 100ms Taxa de atualização
} //end while
}// end void main
//TODO: User Code
void trigger()
{
output_high(trig); // trih = 0x01; trig em nível high
delay_us(10); //por 10 micro segundos
output_low(trig); //trig = 0x00;
} //end trigger |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19549
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| Posted: Wed Jul 04, 2018 10:02 am |
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Are you running this 'for real' , or in a simulator?.
In a simulator, a delay can take ages to execute.
If 'for real', are you sure you will see/detect a 10uSec pulse every 100mSec?. |
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jacktaylor
Joined: 02 Sep 2017
Posts: 75
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| Posted: Wed Jul 04, 2018 10:57 am |
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| Ttelmah wrote: | Are you running this 'for real' , or in a simulator?.
In a simulator, a delay can take ages to execute.
If 'for real', are you sure you will see/detect a 10uSec pulse every 100mSec?. |
It's you absolutely right. In the simulator without the delay_us (100);, I have the signal of the trigger and I can measure 10us of signal with ease in the virtual oscilloscope, when I put the delay_ms (100), it becomes more complicated to read the signal of 10us. In actual assembly I try to work the Echo signal of the Ultrasonic Sensor HC-SR04. And I was having problems with the Echo signal, so I was reducing the program until I got to the trigger. The ideal is to have even a real oscilloscope. Thank you Ttelmah. |
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