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kein
Joined: 23 Jul 2007
Posts: 103
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| PORTD problem |
 Posted: Thu Jan 10, 2013 11:20 pm |
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Hi Gents,
I'm having issues with PORTD. It is configured for all output. Everything works as expected except for RD3, RD4, and RD5. Below is my code which currently. I'm using proteus for simulation. Can anyone kindly advise what the problem is. Thanks in advance.
| Code: | #include <16f877A.h>
#include <float.h>
#include <math.h>
#include <stdio.h>
#include <string.h>
#fuses HS,NOWDT,NOPROTECT,NOBROWNOUT,NOLVP,NOPUT,NOWRT,NODEBUG,NOCPD /* Use XT mode, No Watch Dog, No Code Protect, No Power-up Timer */
#use delay (clock=20000000)
#use rs232 (baud=9600, xmit=pin_c6, rcv=pin_c7, parity=N, stop=1, bits=8)
#define SC_CURR_PIN PIN_E0 //to measure short circuit current
#define LED PIN_E2
#define DELAY 250
void main()
{
int value = 85;
char ch;
char string[64];
setup_adc_ports(No_ANALOGS);
set_tris_b(0); /* set port_b to be outputs */
set_tris_d(0); /* set port_b to be outputs */
set_tris_e(0); /* set port_b to be outputs */
/* echo demo: PIC receives data and sends it back. */
/* If ENTER key is received, this demo exits. */
puts("Type on the keyboard, PIC will echo back the characters:");
output_low(SC_CURR_PIN);
output_b(0x00);
output_d(0x00);
//Example blinking LED program
while(true)
{
output_low(LED);
delay_ms(DELAY);
output_high(LED);
delay_ms(DELAY);
if(kbhit())
{
ch = getc();/* read a single character */
switch (ch)
{
case 'R':
putc(ch);
putc('\n');
putc('\r');
output_b(0b00000000);
output_d(0b00000000);
output_high(SC_CURR_PIN);
break;
case 'B':
putc(ch);
putc('\n');
putc('\r');
output_low(SC_CURR_PIN);
output_d(0b00000000);
output_b(0b11111111);
break;
case 'D':
putc(ch);
putc('\n');
putc('\r');
output_low(SC_CURR_PIN);
output_b(0b00000000);
output_d(11111111);
break;
default:
output_low(SC_CURR_PIN);
output_b(0b00000000);
output_d(0b00000000);
puts("Select Key to test port");
}
}
}
} |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Thu Jan 10, 2013 11:33 pm |
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Look closely at the numbers you are outputting to PortD. You have a
bug in one line, involving the radix. |
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kein
Joined: 23 Jul 2007
Posts: 103
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| Posted: Fri Jan 11, 2013 12:33 am |
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Thank you so much PCM Programmer.
Regards |
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kein
Joined: 23 Jul 2007
Posts: 103
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| What Am I doing wrong |
| Posted: Fri Jan 11, 2013 8:17 am |
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Gents,
I've declared const unsigned int16 array to store binary switch positions as below. The problem is, the compiler gives errors when I compile the code.
| Quote: | i.e. ***Error 103" main.c" Line 20(1,17): constant out of the valid range
***Error 27" main.c" Line 20(1,18):Expression must evaluate to a constant
***Error 43" main.c" Line 20(1,17): Expecting a declaration
etc.etc. |
| Code: | #include <16f877A.h>
#include <float.h>
#include <math.h>
#include <stdio.h>
#include <string.h>
#fuses HS,NOWDT,NOPROTECT,NOBROWNOUT,NOLVP,NOPUT,NOWRT,NODEBUG,NOCPD /* Use XT mode, No Watch Dog, No Code Protect, No Power-up Timer */
#use delay (clock=20000000)
#use rs232 (baud=9600, xmit=pin_c6, rcv=pin_c7, parity=N, stop=1, bits=8)
#define SC_CURR_PIN PIN_E0 //to measure short circuit current
#define LED PIN_E2
#define DELAY 250
const unsigned int16 PV_TT_Array[39]={
0000000000000001,
0000000000110100,
0000001010001000,
0000000101110000,
0000011110110000,
0000001010110000,
0000010000110000,
0000001110010000,
0000001101010000,
0000000001010000,
0000000110010000,
0000001100010000,
0000110111100000,
0000001011100000,
0000110101100000,
0010001110100000,
0000010010100000,
0001000100100000,
0000110111000000,
0001010011000000,
0010110101000000,
0010110001000000,
0000100001000000,
0010111110000000,
0000001110000000,
0101010110000000,
0010010110000000,
0010111010000000,
0101011010000000,
1111110010000000,
0010100010000000,
0000000010000000,
0000011100000000,
0001010100000000,
0000000100000000,
0000001000000000,
0000010000000000,
0010000000000000,
1000000000000000
};
void main()
{
int value = 85;
char ch;
char string[64];
setup_adc_ports(No_ANALOGS);
set_tris_b(0); /* set port_b to be outputs */
set_tris_d(0); /* set port_d to be outputs */
set_tris_e(0); /* set port_e to be outputs */
/* echo demo: PIC receives data and sends it back. */
/* If ENTER key is received, this demo exits. */
puts("Type on the keyboard, PIC will echo back the characters:");
output_low(SC_CURR_PIN);
output_b(0x00);
output_d(0x00);
//Example blinking LED program
while(true)
{
output_low(LED);
delay_ms(DELAY);
output_high(LED);
delay_ms(DELAY);
}
} |
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Gabriel
Joined: 03 Aug 2009
Posts: 1067
Location: Panama
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| Posted: Fri Jan 11, 2013 10:16 am |
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| Code: | const unsigned int16 PV_TT_Array[39]={
0000000000000001,
0000000000110100, |
...and exactly what type of number are these 1's and 0's?
Binary?
Hex?
decimal?
.... you should probably tell that to the compiler.
g.
_________________
CCS PCM 5.078 & CCS PCH 5.093 |
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