PIC18F - how to get 2khz from 48MHz Freq using timer/ pwm

[xyzabcpqr]

Hello,

I am currently working on PIC18f13k50 - USB interfacing with PC through USB HID application.
(12MHz crystal *4 PLL ) Fosc = 48MHz . I want to run buzzer @ 2 KHz . I used PWM module .
But as per calculation, I can get the lowest 2.93 KHz Freq.
I am using timer2 for PWM with 16 prescaler(max. value).

period = (255+1)*4*(1/48000000)*16(prescaler)
= 340 micro-sec
f= 2.93 KHz

How can I reduce the freq to 2KHz?

I tried to use Timer 1 and following is the code but using timer1 i can't get sound from buzzer.


#pragma interrupt YourLowPriorityISRCode
void YourLowPriorityISRCode()
{

T1CONbits.TMR1ON = 1;
TMR1H = 0xE2;
TMR1L = 0xB3;

while(!PIR1bits.TMR1IF){
SPEAKER = 1;
Delay1();
SPEAKER = 0;
}
PIR1bits.TMR1IF=0;
}


Can anyone give me a guidance?

 

[Kripton2035]

this is a nice program to do that :
**broken link removed**
**broken link removed**

which gives the C program :

// Timer1 Registers:
// Prescaler=1:1; TMR1 Preset=41536; Freq=2,00kHz; Period=500*000 ns
T1CON.T1CKPS1 = 0;// bits 5-4  Prescaler Rate Select bits
T1CON.T1CKPS0 = 0;//
T1CON.T1OSCEN = 1;// bit 3 Timer1 Oscillator Enable Control: bit 1=on
T1CON.T1SYNC  = 1;// bit 2 Timer1 External Clock Input Synchronization Control bit: 1=Do not synchronize external clock input
T1CON.TMR1CS  = 1;// bit 1 Timer1 Clock Source Select bit: 0=Internal clock (FOSC/4) / 1 = External clock from pin T13CKI (on the rising edge)
T1CON.TMR1ON  = 1;// bit 0 enables timer
TMR1H = 0xA2;     // preset for timer1 MSB register
TMR1L = 0x40;     // preset for timer1 LSB register

 

[xyzabcpqr]

Hello Kripton,

It is really helpful.. Thanks a ton..