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acidice333
Joined: 14 Oct 2006
Posts: 33
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 Posted: Tue Nov 29, 2011 2:47 am |
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Just curious how do you calculate for 48mhz? its probably right in front of me and I just dont understand. Much appreciated thanks!
| Quote: |
/* TIMER0 configuration */
#define TIMER0_CONFIG RTCC_INTERNAL | RTCC_DIV_1
/* Interrupt rate: */
/* 4/32000000*65536*1 = 8.192 ms */
/* */
/* Start: 3.0 ms (ignored) */
/* "1": 1.8 ms (14400) */
/* "0": 1.2 ms (9600) */
#define ONE_MIN 13400
#define ONE_MAX 15400
#define ZERO_MIN 8600
#define ZERO_MAX 10600
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sahu77
Joined: 08 Sep 2011
Posts: 202
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| Posted: Fri Dec 23, 2011 11:19 am |
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Anybody can convert it code in RC5 for help me ....
_________________
sahu |
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masterat
Joined: 17 Jul 2010
Posts: 26
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| Posted: Tue Jan 03, 2012 1:33 am |
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| acidice333 wrote: | Just curious how do you calculate for 48mhz? its probably right in front of me and I just dont understand. Much appreciated thanks!
/* TIMER0 configuration */
#define TIMER0_CONFIG RTCC_INTERNAL | RTCC_DIV_1
/* Interrupt rate: */
/* 4/32000000*65536*1 = 8.192 ms */
/* */
/* Start: 3.0 ms (ignored) */
/* "1": 1.8 ms (14400) */
/* "0": 1.2 ms (9600) */
#define ONE_MIN 13400
#define ONE_MAX 15400
#define ZERO_MIN 8600
#define ZERO_MAX 10600
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48 Mhz Should be:
| Code: |
/* Interrupt rate: */
/* 4/48000000*65536*1 = 5.46125 ms */
/* */
/* Start: 3.0 ms (ignored) */
/* "1": 1.8 ms (21600) */
/* "0": 1.2 ms (14400) */
#define ONE_MIN 22600
#define ONE_MAX 20600
#define ZERO_MIN 13400
#define ZERO_MAX 15400 |
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rdoradus
Joined: 07 Jan 2013
Posts: 1
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| answer |
| Posted: Mon Jan 07, 2013 10:18 pm |
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The answer for HTAluvBeBeo is only work with #fuses. I compile the code for send with RS-232 and proved with pickit2 clone and it works great
I have written next fuses in header:
| Code: | #include <18f4550.h>
#FUSES HS,NOWDT,WDT128,NOPROTECT,NOBROWNOUT,BORV20,PUT,MCLR,NOCPD,NODEBUG,NOLVP,NOWRT,NOWRTD,NOWRTB,NOEBTR,NOEBTRB,NOCPB,NOWRTC,NOFCMEN,NOPBADEN,PLL1,CPUDIV1,USBDIV,VREGEN,ICPRT,STVREN,NOIESO,LPT1OSC,NOXINST
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_B7, rcv=PIN_B6)
#use fast_io(B)
/* TIMER0 configuration */
#define TIMER0_CONFIG RTCC_INTERNAL | RTCC_DIV_1
/* Interrupt rate: */
/* 4/20000000*65536*1 = 13.1072 ms 5.46125 */
/* */
/* Start: 3.0 ms (ignored) */
/* "1": 1.8 ms (9000) 7.28177777 */
/* "0": 1.2 ms (6000) 10.922666 */
#define ONE_MIN 8000
#define ONE_MAX 10000
#define ZERO_MIN 5000
#define ZERO_MAX 7000 |
All extra code equal...
Crystal of 20MHz PIC18F2550 and RS-232 from Pickit2 clone. |
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loctip
Joined: 12 May 2013
Posts: 1
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| Re: Infrared receiver for SONY remotes |
| Posted: Sun May 12, 2013 10:33 pm |
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| Code: | /* Interrupt rate: */
/* 4/32000000*65536*1 = 8.192 ms */
/* */
/* Start: 3.0 ms (ignored) */
/* "1": 1.8 ms (14400) */
/* "0": 1.2 ms (9600) */
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Plz show me how to calculate these datas !
Thanks a lot
14400 9600 |
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