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murtis
Joined: 12 Aug 2007
Posts: 41
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| PIC18F4620 at 40MHz |
 Posted: Thu Jan 29, 2009 1:02 pm |
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How can i drive PIC18F4620 at 40MHz? Could you send me some example_? How can i use the PLL for 40MHz or 32Mhz_?
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MurtiS |
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treitmey
Joined: 23 Jan 2004
Posts: 1094
Location: Appleton,WI USA
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| Posted: Thu Jan 29, 2009 1:12 pm |
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| Code: | #define FIRM_MAJOR 'E'
#define FIRM_MINOR 1
#define HARD_MAJOR 3
#define HARD_MINOR 3
//#include <18F4525.h>
#include <18F4620.h>
#use delay(clock=40000000, restart_wdt) //note the crystal is 10Mhz
#fuses h4,nowdt,noprotect,nolvp,put //note h4 is 4x pll must power off to reset pll
#use rs232(baud=19200,xmit=PIN_C0,invert,stream=DEBUG) // stderr(same as debug)
#use rs232(baud=19200,enable=PIN_C5,xmit=PIN_C6,rcv=PIN_C7,stream=CIM) // rs485 is the default
#case
#zero_ram
#include <flex_lcd.c> //can be used with lumex S011602 or Optrex DMC16202NYJ
//=== MAIN ===//
void main(void)
{
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
set_tris_a(0xFF);set_tris_e(0xFF);set_tris_c(0xFF);
set_tris_b(0xFF);set_tris_d(0xFF);port_b_pullups(TRUE);
fprintf(DEBUG,"Firm=%C_%03u.c\n\r",FIRM_MAJOR,FIRM_MINOR);
fprintf(DEBUG,"Hard=%u.%u\n\r",HARD_MAJOR,HARD_MINOR);
lcd_init();
while(1)
{
}
}
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Guest
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| Posted: Thu Jan 29, 2009 10:04 pm |
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Here is another way,
#use delay(clock=40M, oscilator=10M)
The compiler will set the H4 config bit for you....
HTH - Steve H |
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asmallri
Joined: 12 Aug 2004
Posts: 1634
Location: Perth, Australia
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| Posted: Thu Jan 29, 2009 11:31 pm |
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| Anonymous wrote: | Here is another way,
#use delay(clock=40M, oscilator=10M)
The compiler will set the H4 config bit for you....
HTH - Steve H |
This is version dependent
_________________
Regards, Andrew
http://www.brushelectronics.com/software
Home of Ethernet, SD card and Encrypted Serial Bootloaders for PICs!! |
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murtis
Joined: 12 Aug 2007
Posts: 41
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| Posted: Tue Mar 31, 2009 3:46 pm |
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| asmallri wrote: | | Anonymous wrote: | Here is another way,
#use delay(clock=40M, oscilator=10M)
The compiler will set the H4 config bit for you....
HTH - Steve H |
This is version dependent |
I use the ICD-U40 debugger. 10MHz Xtal is used on my hardware design. When i started debugger module on PCWHD, i see the some information at the bottom of the debugger screen that is "Ready MCU at 10.00MHz". My question is that PIC18F4620 is working at 40MHz or 10MHz. Which one is true for me_?
Thanks for your solution offering me....
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MurtiS |
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