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mcnscott2
Joined: 25 Mar 2007
Posts: 19
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| question regarding fuses |
 Posted: Sun Mar 25, 2007 10:30 pm |
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I'm using this *code to implement a project, however this is my first in C and not assembly, In assembly a directive for the programmer (PICSTART Plus) has to be included, but this code doesn't have one
| Code: | #include <SLED4C_1620a.h> // header file & function prototypes
void Main(void)
{
int announce=0; // holds # of time/temp announcements
init(); // initialize I/O & peripherals
while(1) // loop forever
{
read_time(); // read & display DS1307 time
read_temp(); // read & display DS1620 temp
// announce time/temp on roll-over from 59 to 00 minutes
if(ds1307_regs[MINUTES_REG]==0x00)
{
if(!announce) // say time & temp only if announce=0
{
say_time(); // say the current time
delay_ms(3000); // delay 3 seconds
say_temp(); // say the current temperature
announce +=1; // increment announcement counts
}
}
if(!ds1307_regs[MINUTES_REG]==0x00)
announce=0; // clear announcements until it's time
}
}
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and the header file
| Code: | /*
File name: SLED4C_1620a.h
Header file for SLED4C_1620a.c
*/
#include <16f876A.h>
#use delay(clock=20000000)
#use rs232(baud=2400, xmit=PIN_C0)
#use i2c(Master, SDA=PIN_B0, SCL=PIN_B1)
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I've always used MPLAB and am integrating C with it now, so does the IDE automatically set the fuses? Looking at the CCS configuration window inside MPLAB, it seems it does, I'm not sure. Do I have to even put the fuses in or has my assembly learning been all wrong? Thank you.
*note code is from www.rentron.com |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Sun Mar 25, 2007 11:09 pm |
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No, it doesn't automatically do it. You need to add a #fuses statement,
as shown in bold below.
| Quote: |
#include <16F876A.h>
#fuses HS, NOWDT, BROWNOUT, PUT, NOLVP
#use delay(clock=20000000)
#use rs232(baud=2400, xmit=PIN_C0)
#use i2c(Master, SDA=PIN_B0, SCL=PIN_B1) |
Also, your #use rs232() statement will create a software UART.
If you want a hardware UART (much better), than use this line instead:
| Code: | | #use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, ERRORS) |
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mcnscott2
Joined: 25 Mar 2007
Posts: 19
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| Posted: Mon Mar 26, 2007 1:31 am |
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| Great, thank you! I'll implement the changes tomorrow. |
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