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germansket
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| Internal clock 32MHz in PIC18F2685 |
 Posted: Sun May 03, 2009 10:17 pm |
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I could not get config the PIC.
I used the next code:
| Code: | | setup_oscillator(OSC_8MHZ|OSC_PLL_ON); |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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germansket
Guest
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| Posted: Mon May 04, 2009 11:29 am |
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I used the next code and doesnt work at 32 MHZ
| Code: |
#include <18F2685.h>
#device adc=8
#FUSES NOWDT //No Watch Dog Timer
#FUSES WDT128 //Watch Dog Timer uses 1:128 Postscale
#FUSES INTRC_IO //Internal RC Osc, no CLKOUT
#FUSES NOPROTECT //Code not protected from reading
#FUSES NOBROWNOUT //No brownout reset
#FUSES BORV20 //Brownout reset at 2.0V
#FUSES NOPUT //No Power Up Timer
#FUSES NOCPD //No EE protection
#FUSES NOSTVREN //Stack full/underflow will not cause reset
#FUSES NODEBUG //No Debug mode for ICD
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or
#FUSES NOWRT //Program memory not write protected
#FUSES NOWRTD //Data EEPROM not write protected
#FUSES NOIESO //Internal External Switch Over m
#FUSES NOFCMEN //Fail-safe clock monitor disabled
#FUSES NOPBADEN //PORTB pins are configured as digital
#FUSES BBSIZ4K //4K words Boot Block size
#FUSES NOWRTC //configuration not registers write protect
#FUSES NOWRTB //Boot block not write protected
#FUSES NOEBTR //Memory not protected from table reads
#FUSES NOEBTRB //Boot block not protected from table rea
#FUSES NOCPB //No Boot Block code protection
#FUSES LPT1OSC //Timer1 configured for low-power operati
#FUSES NOMCLR //Master Clear pin used for I/O
#FUSES NOXINST //Extended set extension and Indexed Ad
#byte OSCTUNE = 0XF9B
#byte OSCCON = 0XFD3
#use delay(clock=32000000)
#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8)
void main()
{
int variable;
setup_adc_ports(NO_ANALOGS|VSS_VDD);
setup_adc(ADC_OFF|ADC_TAD_MUL_0);
setup_spi(SPI_SS_DISABLED);
setup_wdt(WDT_OFF);
setup_timer_0(RTCC_INTERNAL);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_timer_3(T3_DISABLED|T3_DIV_BY_1);
setup_vref(FALSE);
setup_oscillator(OSC_32MHZ|OSC_PLL_ON);
do
{
variable++;
printf("V=%u",variable);
output_bit( PIN_B0, 1);
delay_ms(10);
output_bit( PIN_B0, 0);
}while(TRUE);
} |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Mon May 04, 2009 11:38 am |
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Try the simple program in my link.
Also post your compiler version. It's given at the top of the .LST file.
The .LST file is in your project directory. The version number is in
this format: x.xxx |
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germansket
Guest
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| Posted: Mon May 04, 2009 11:44 am |
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It is working very well. I didn't measure well with the scope. The code is ok.
Thanks PCM.
The problem is that when I simulated in MPLAB the register OSCTUNE bit 6 is 0 "zero" when should be 1 if I use the PLL. But when I program the pic, this work in 32 mhz.
I don't know what it is the problem in the simulate. |
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germansket
Guest
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| Posted: Mon May 04, 2009 12:50 pm |
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| PCM programmer wrote: | Try the simple program in my link.
Also post your compiler version. It's given at the top of the .LST file.
The .LST file is in your project directory. The version number is in
this format: x.xxx |
The compiler version is 4.065 and I simulated with MPLAB 8.
Regards. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Mon May 04, 2009 1:05 pm |
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Read the MPLAB Help file for the Simulator. It says:
| Quote: |
The internal oscillator can be changed in software, but will not affect of
the speed of the oscillator during runtime. |
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