[SOLVED] pic 16f1824 problem with internal oscillator

sarathsnairpoonjar · Nov 23, 2012

disable from where?
mikroc?

Tahmid · Nov 23, 2012

Yes. From the configuration settings you can select when you press Ctrl + Shift + E.

sarathsnairpoonjar · Nov 23, 2012

this is the settings i used in project .where is PLLEN?

internetuser2k12 · Nov 23, 2012

scroll that window.

Tahmid · Nov 23, 2012

Pull the scroll bar down. There are more settings below these. The PLL settings is below.

sarathsnairpoonjar · Nov 23, 2012

NO i have disabled it ,still not working

Tahmid · Nov 23, 2012

Can you post your project file here? I'd like to take a look.

sarathsnairpoonjar · Nov 23, 2012

void main()
{

OSCCON=0x72;
ANSELA=0;
delay_ms(500);
UART1_Init(9600) ;

TXCKSEL_bit=1;
TRISA0_bit=0;
ANSELC=0x00;
TRISC0_bit=0;

delay_ms(2000);

while (1)
{
UART1_Write('A');
RC0_bit=1;
delay_ms(1000);
RC0_bit=0;
delay_ms(1000);

} }

this is the code used to test usart...but nothing write in the terminal..but the pin is toggling

Tahmid · Nov 23, 2012

You need to write a value to APFCON0 to set the RX and TX pins. Check page 122 in the datasheet.

sarathsnairpoonjar · Nov 23, 2012

this is the rar file containing the project

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TXCKSEL_bit=1
this is bit in the APFCON0 Register

Tahmid · Nov 23, 2012

Disable the comparators and the capacitive sensing module:

Code:

CM1CON0 = 0;
CM2CON0 = 0;
CPSON_bit = 0;

Does the program run with external oscillator?

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Change value of OSCCON to 0x70.

sarathsnairpoonjar · Nov 23, 2012

Tahmid said:
Disable the comparators and the capacitive sensing module:

Code:

CM1CON0 = 0; CM2CON0 = 0; CPSON_bit = 0;

Does the program run with external oscillator?

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Change value of OSCCON to 0x70.

OSCCON0=0X70 makes delay verly large.i dont have option to test with external oscillator

Tahmid · Nov 23, 2012

How large is the delay?

Do you get UART output?

sarathsnairpoonjar · Nov 23, 2012

no output...

Tahmid · Nov 23, 2012

Try with this code:

Code:

    void main()
    {
    OSCCON=0x72;
    ANSELA=0;
    TRISA0_bit=0;
    
    TXCKSEL_bit=1;
    RXDTSEL_bit=1;
    //UART1_Init(9600);

    SPBRGH = 0;
    SPBRGL = 12;
    BRGH_bit = 0;
    BRG16_bit = 0;
    SYNC_bit = 0;
    SPEN_bit = 1;
    TX9_bit = 0;
    TXEN_bit = 1;
    
    delay_ms(500) ;

    CPSON_bit=0;
    C1ON_bit=0;
    GIE_bit=0;

    TRISA1_bit=1;
    TRISC5_bit=0;


    TRISC4_bit=1;


    // initialize UART1 module


    while (1)
    {
    TXREG = 'A';
    RC0_bit=1;
    delay_ms(1000);
    RC0_bit=0;
    delay_ms(1000);

    } }

sarathsnairpoonjar · Nov 23, 2012

Tahmid said:

Try with this code:

Code:

    void main()
    {
    OSCCON=0x72;
    ANSELA=0;
    TRISA0_bit=0;
    
    TXCKSEL_bit=1;
    RXDTSEL_bit=1;
    //UART1_Init(9600);

    SPBRGH = 0;
    SPBRGL = 12;
    BRGH_bit = 0;
    BRG16_bit = 0;
    SYNC_bit = 0;
    SPEN_bit = 1;
    TX9_bit = 0;
    TXEN_bit = 1;
    
    delay_ms(500) ;

    CPSON_bit=0;
    C1ON_bit=0;
    GIE_bit=0;

    TRISA1_bit=1;
    TRISC5_bit=0;


    TRISC4_bit=1;


    // initialize UART1 module


    while (1)
    {
    TXREG = 'A';
    RC0_bit=1;
    delay_ms(1000);
    RC0_bit=0;
    delay_ms(1000);

    } }

no tahmid its not working....

Tahmid · Nov 23, 2012

How are you testing the UART output?

sarathsnairpoonjar · Nov 23, 2012

connected a max232 and its out is connected to a pc using PLCTEST to check if data is coming

Tahmid · Nov 23, 2012

Is your hardware okay?

sarathsnairpoonjar · Nov 23, 2012

tx -max 11th pin
rx -max 12 th
db9-2nd pin -max-13th pin
db9-3rd pin --max -14th pin

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Tahmid said:
Is your hardware okay?

harware is working fine

[SOLVED] pic 16f1824 problem with internal oscillator

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