Ben Katz / FastPWM3

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Dependents:   qonly_controller foc-ed_in_the_bot_compact foc-ed_in_the_bot_compact CurrentModeSine ... more

Fork of FastPWM by Erik -

FastPWM.cpp

Committer:
Sissors
Date:
2012-07-12
Revision:
2:4b8de6ae5885
Parent:
0:f8c1b0ad5371
Child:
3:3094d3806cfc

File content as of revision 2:4b8de6ae5885:

#include "FastPWM.h"

FastPWM::FastPWM(PinName pin) : PWMObject(pin){
    _duty=0;
    _period=0.02;
    if (pin==p26||pin==LED1)
        MR=&LPC_PWM1->MR1;
    else if (pin==p25||pin==LED2)
        MR=&LPC_PWM1->MR2;
    else if (pin==p24||pin==LED3)
        MR=&LPC_PWM1->MR3;
    else if (pin==p23||pin==LED4)
        MR=&LPC_PWM1->MR4;
    else if (pin==p22)
        MR=&LPC_PWM1->MR5;
    else if (pin==p21)
        MR=&LPC_PWM1->MR6;
    else
        error("No hardware PWM pin\n\r");
    
    period(_period);
}

void FastPWM::period(double seconds) {
    LPC_PWM1->MR0 = (unsigned int) (seconds * (double)F_CLK);
    pulsewidth(_duty*seconds);
    _period = seconds;
}

void FastPWM::period_ms(int ms) {
    period((double)ms/1000.0);
}

void FastPWM::period_us(int us) {
    period((double)us/1000000.0);
}

void FastPWM::period_us(double us) {
    period(us/1000000.0);
}

void FastPWM::pulsewidth(double seconds) {
    *MR=(unsigned int) (seconds * (double)F_CLK);
}

void FastPWM::pulsewidth_ms(int ms) {
    pulsewidth((double)ms/1000.0);
}

void FastPWM::pulsewidth_us(int us) {
    pulsewidth((double)us/1000000.0);
}

void FastPWM::pulsewidth_us(double us) {
    pulsewidth(us/1000000.0);
}

void FastPWM::write(double duty) {
    _duty=duty;
    pulsewidth(duty*_period);
}

double FastPWM::read( void ) {
    return _duty;
    }
    
FastPWM & FastPWM::operator= (double value) {
    write(value);
    return(*this);
    }
    
FastPWM::operator double() {
    return _duty;
}