Hello people. :-)
I am a beginner in the world of micro-controllers. I have the
PIC24F04KA201 and I have been trying to pulse an LED using the internal
clock of the microcontroller.
Here is the code that I have been using.
1 | /*
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2 | * File: newmainXC16.c
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3 | * Author: Soumojit Bose
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4 | *
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5 | * Created on February 24, 2018, 8:52 PM
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6 | */
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7 |
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8 | #include <p24F04KA201.h>
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9 | #define FOSC 32000000
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10 | #define FCY (FOSC/2)//This is generally crystal frequency divided by 2
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11 | #include <libpic30.h>
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12 | #include<xc.h>
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13 |
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14 |
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15 | /******************************************************************************/
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16 |
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17 | /* *** Configuration Bits Setting *** */
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18 |
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19 | _FGS(GWRP_OFF & GCP_OFF)
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20 | _FOSCSEL(FNOSC_PRI & IESO_OFF)
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21 | _FOSC(POSCMOD_HS & OSCIOFNC_ON & POSCFREQ_HS & FCKSM_CSDCMD)
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22 | _FWDT(WINDIS_OFF & FWDTEN_OFF)
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23 | _FPOR(BOREN_BOR2 & PWRTEN_OFF & BORV_18V & MCLRE_ON)
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24 | _FDS(DSWDTEN_OFF)
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25 |
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26 | /******************************************************************************/
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27 | /*
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28 | *
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29 | */
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30 |
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31 | //void Delay(unsigned int a);
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32 | int main()
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33 | {
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34 |
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35 |
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36 | TRISBbits.TRISB0 = 0; /* Making Pin as output */
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37 |
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38 | LATBbits.LATB0 = 0; /* Writing zero to pin 0 of port A */
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39 |
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40 | while(1)
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41 | {
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42 | LATBbits.LATB0 = ~LATBbits.LATB0; /* toggling state of PIN zero to one and vice versa */
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43 | __delay_ms(10); // this is actual delay time in msec
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44 | }
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45 |
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46 | return 0;
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47 | }
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What I do not understand is how to set the OSCCCON bits so that I can
use the internal clock of the PIC24 to do my LED pulsing. Will the
_delay_ms() function work in the same way, if I use an external clock?
