louishuynh
Joined: 01 Oct 2008
Posts: 1
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| printf(""); problem |
 Posted: Thu Oct 02, 2008 11:32 am |
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Hi,
I have a problem with sending a msg through the RS-232. Here is the detail of my program:
1-When the PIC16F916 is powered on: the 2 LED (Passed and Failed) will flash 1 time
2-If the Switch is pressed and released: The 2 LEDs will flash 3 times, after that the msg "Hello!" will be displayed on the screen - And then the 2 LEDs will flash 2 other times and it will turn OFF
Problem:
After the 2 LEDs have flashed 3 times, then the line of code: "printf("Hello!");" should be executed but somehow this line of code is not executed, nothing is displayed and the program is stuck there.
I did put “#use delay(clock=4000000) and #use rs232(baud=9600, parity=N, xmit=PIN_C6, rcv=PIN_C7, bits=8)" at the beginning of the program.
Any help will be appreciated, thanks
Here is my program:
| Code: |
#include <16F916.h>
#FUSES NOWDT
#FUSES INTRC_IO
#FUSES PUT
#FUSES NOPROTECT
#FUSES NOMCLR
#FUSES NOCPD
#FUSES BROWNOUT
#FUSES IESO
#FUSES FCMEN
#FUSES NODEBUG
#use delay(clock=4000000)
#define SetPortA 0x2F
#define SetPortB 0x82
#define poLED_Failed PIN_B5
#define poLED_Passed PIN_B6
#define piSwitch_In PIN_B7
#define SetPortC 0x98
#define poTx PIN_C6
#define piRx PIN_C7
#define SetPortE 0x08
#use fast_io(a)
#use fast_io(b)
#use fast_io(c)
#byte PORTA =0x05
#byte PORTB =0x06
#byte PORTC =0x07
#byte PORTE =0X09
#byte STATUS =0x03
#byte INTCON =0x0B
#byte ANSEL =0x91
#byte ADRESH =0x1E
#byte ADCON0 =0x1F
#byte ADRESL =0x9E
#byte ADCON1 =0x9F
#byte OPTION =0x81
#byte WPU =0x95
#byte TXSTA =0x98
#byte RCSTA =0x18
#byte SPBRG =0x99
#byte TRISE =0x89
#byte OSCCON =0x8F
#byte OSCTUNE =0x90
//=============================================
void main()
{
#use rs232(baud=9600, parity=N, xmit=PIN_C6, rcv=PIN_C7, bits=8)
int i;
SETUP_TIMER_0(RTCC_INTERNAL|RTCC_DIV_1);
SETUP_TIMER_1(T1_DISABLED);
SETUP_TIMER_2(T2_DISABLED,0,1);
SETUP_COMPARATOR(NC_NC_NC_NC);
SETUP_VREF(FALSE);
SETUP_SPI(FALSE);
SETUP_LCD(LCD_DISABLED);
SET_TRIS_A(SetPortA);
SET_TRIS_B(SetPortB);
SET_TRIS_C(SetPortC);
TRISE = SetPortE;
RCSTA = 0x00;
//Clear PortA, PortB, PortC and PortE
PORTA = 0;
PORTB = 0;
PORTC = 0;
PORTE = 0;
delay_ms(100);
for(;;)
{
//-------------------------------------------------------------------
output_High(poLED_Failed);
output_High(poLED_Passed);
_Wait:
while (input(piSwitch_In)); //---------If the Switch is not pressed, keep waiting
delay_ms(100);
if (input(piSwitch_In))
goto _Wait;
_Test0:
while (!input(piSwitch_In)); //---------If the Switch is pressed but not released, keep waiting
if (input(piSwitch_In)) //---------If the Switch is released, start the test
{
delay_ms(100);
if (input(piSwitch_In))
{
goto _Test1;
}
}
goto _Test0;
//------------------------------------------------------------------------
_Test1:
for(i=0; i<5;i++)
{
output_Low(poLED_Passed);
delay_ms(500);
output_High(poLED_Passed);
output_Low(poLED_Failed);
delay_ms(500);
output_High(poLED_Failed);
if(i==2)
{
printf("Hello!");
}
}
}
} |
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