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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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 Posted: Sat Dec 25, 2010 2:51 pm |
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PortB must be read inside the #int_RB routine, to clear the "Mismatch
condition". This is stated in the PIC data sheet. To do this, add the
code (shown in bold below) to your program.
| Quote: |
// This function reads Port B without changing the TRIS.
int8 input_state_b(void)
{
#byte PortB = getenv("SFR:PORTB")
return(PortB);
}
#int_RB
void RB_isr(void)
{
int8 temp;
PKC++;
if((Command!=Press_Key_First)||(Command!=Press_Key_Second)||(Command!=Press_Key_Third)){Pervius_Command=Command;}
switch (PKC){
case 1: Command=Press_Key_First;PK1=1;PK2=0;PK3=0;break;
case 2: command=Press_Key_Second;PK1=0;PK2=1;PK3=0;break;
default: command=Press_Key_Third;PK1=0;PK2=0;PK3=1;PKC=0;break;
}
OFC=0;
set_timer0(0);
enable_interrupts(INT_TIMER0);
temp = input_state_b(); // Clear mismatch condition on Port B
} |
| Quote: |
#include <16F876.h>
#device ICD=TRUE
#device adc=10
#FUSES NOWDT //No Watch Dog Timer
#FUSES XT //Crystal osc <= 4mhz for PCM/PCH , 3mhz to 10 mhz for PCD
#FUSES NOPUT //No Power Up Timer
#FUSES NOPROTECT //Code not protected from reading
#FUSES NOBROWNOUT //No brownout reset
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NOCPD //No EE protection
#FUSES NOWRT //Program memory not write protected
#FUSES DEBUG //Debug mode for use with ICD
#use delay(clock=2000000) |
Do you really have a 2 MHz crystal ? That's very unusual. Or is it
really supposed to be 20 MHz ? If so, edit the #use delay() statement
and also change the fuse from XT to HS.
Are you using the INT output pin of the pcf8563 ? If so, you need a
pull-up resistor on it. You can use 4.7K ohms. |
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HGHK
Joined: 29 Jun 2010
Posts: 33
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| Posted: Tue Dec 28, 2010 7:08 am |
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Dear PCM programmer
thanks
I test it, but noises make interrupt in another pin from B4-B7. I must pull-up Port B but I made my PCB and I don't know why when I use
in my program the port doesn't pull up.
I used 1MHz crystal before but I don't find it in shops and I prefer 2MHz crystal for low consuming power requirements in PIC16LF876 series and I2C baud rate true setting. Also it find in shops!
If you have a better offer I very like to know.
I use PCF8563 Interrupt for wake up from sleep and I pull up it by 4.7K resistor. So I pull up Pin B5 and it connect with Push-pull bottom and noise reduction capacitor to GND.
Thanks for your help. 
_________________
My Gmail is:
HGholizadehK@Gmail.com
You can send pm for me in it |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Tue Dec 28, 2010 12:51 pm |
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| Quote: | I must pull-up Port B but I made my PCB and I don't know why when I use:
port_b_pullups(1);
in my program the port doesn't pull up. |
Then make a small test program and study how to use the
port_b_pullups() function.
I looked in your program for the port_b_pullups() line, which you say
you have in there. I didn't find it. But I did see this problem:
| Quote: |
void ReportTSC(int32 inp){
int8 i,dig[4],temp;
dig[0]= make8(inp,0);
dig[1]= make8(inp,1);
dig[2]= make8(inp,2);
dig[3]= make8(inp,3);
temp=Sleep_Priod_Division_Reg;
putc(I_am_ready);
for(i=0;i=3;i++)putc(dig[i]); putc(temp);
}
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What does that line do ? How can "i=3" work ?
Here is a test program to test that line of code:
| Code: | #include <16F877.H>
#fuses XT, NOWDT, NOPROTECT, BROWNOUT, PUT, NOLVP
#use delay(clock=4000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, ERRORS)
//==========================================
void main()
{
int8 i;
for(i=0;i=3;i++) putc('A');
while(1);
} |
Here is the output:
| Quote: | AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA |
Your code does not work correctly.
You need to study "for loops" in the C language and learn how to make
a correct for() statement. |
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HGHK
Joined: 29 Jun 2010
Posts: 33
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| Posted: Tue Jan 04, 2011 4:19 am |
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| Quote: | I looked in your program for the port_b_pullups() line, which you say
you have in there. I didn't find it. |
I placed corrections that you offered in my program. Thanks for your attention. but in ccs c manual says that: | Quote: | for
For is also used as a loop/iteration statement.
The syntax is
for (expr1;expr2;expr3)
statement
The expressions are loop control statements. expr1 is the initialization, expr2 is the termination check and expr3 is re-initialization. Any of them can be omitted.
Example:
for (i=1;i<=10;++i)
printf("%u\r\n",i); |
I think termination check means that when I come to expr2 this loop is end of screwing and when this loop were end next line go runs.
pleas help me that what of these:
| Code: | | for(i=0;i<=3;i++)putc(dig[i]); |
or
| Code: | | for(i=0;i>3;i++)putc(dig[i]); |
is ok?
_________________
My Gmail is:
HGholizadehK@Gmail.com
You can send pm for me in it |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Tue Jan 04, 2011 1:22 pm |
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Make a test program. Test it with each of those lines of code.
Then you can see what each line does.
You can test it with the MPLAB simulator:
See this post for instructions on how to use the "UART1" feature of the
MPLAB simulator to display serial output in the MPLAB Output Window:
http://www.ccsinfo.com/forum/viewtopic.php?t=23408&start=1 |
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