voltage.c File Reference

#include <inttypes.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include "voltage.h"
#include "util.h"
#include <stdio.h>

Include dependency graph for voltage.c:

Functions
void	pump_init ()
void	pump_nomoar ()
	Terminate boost converter operation.
void	pump_faster (int8_t dfreq)
void	adc_init ()
void	voltage_start ()
	Start voltage booster.
uint16_t	voltage_getbcd ()
uint16_t	voltage_get ()
void	voltage_set (uint16_t setpoint)
	set voltage setpoint
uint16_t	voltage_setpoint_get ()
	ISR (ADC_vect)
Variables
volatile uint16_t	voltage
	voltage (magic units)

---

Function Documentation

void adc_init

(

)

                {
    voltage = 0;
    
    // PORTA.7 is the feedback input, AREF = AREF pin
    ADMUX = 7;  
    //DDRA &= ~_BV(7);

    // ADC enable, autotrigger, interrupt enable, prescaler = 111 (divide by 32)
    ADCSRA = BV6(ADEN, ADFR, ADIE, ADPS2, ADPS1, ADPS0); 
    //ADCSRA = BV5(ADEN, ADIE, ADPS2, ADPS1, ADPS0); 

    ADCSRA |= _BV(ADSC); 
}

ISR

(

ADC_vect

)

              {
    voltage = (voltage + ADC) / 2;
    if (voltage < voltage_setpoint) {
        OCR1A = ocr1a_reload;
    } else {
        OCR1A = 0;
    }
}

void pump_faster

(

int8_t

dfreq

)

                               {
    ICR1 += dfreq;
}

void pump_init

(

)

                 {
    // set fast pwm mode
    // COM1A1:0 = 10, clear oc1a on compare match, set at top
    // COM1B1:0 = 00, normal port operation
    // no FOC
    // WGM11:10 (WGM = Fast PWM, TOP=ICR1: 1110) = 11
    TCCR1A = BV2(COM1A1, WGM11);
    TCCR1B = BV2(WGM13,WGM12);
    
    OCR1A = ocr1a_reload; 
    ICR1 = 170;
    
    TCCR1B |= _BV(CS10); // clk/1 = 8MHz
    
    DDRHVPUMP |= BV2(1,2);
}

void pump_nomoar

(

)

Terminate boost converter operation.

                   {
    ADCSRA = 0;
    ADCSRA |= _BV(ADIF); 

    ICR1 = 255;
    OCR1A = 0;
    OCR1B = OCR1A;
}

uint16_t voltage_get

(

)

[inline]

                              {
    return voltage;
}

uint16_t voltage_getbcd

(

)

                          {
    // 1024 = 500V
    uint16_t val = (voltage * 32) / 65;
    return tobcd16(val);
}

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void voltage_set

(

uint16_t

setpoint

)

set voltage setpoint

                                    {
    voltage_setpoint = setpoint;
}

uint16_t voltage_setpoint_get

(

)

[inline]

{ return voltage_setpoint; }

void voltage_start

(

)

Start voltage booster.

                     {
    adc_init();
    pump_init();
}

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Variable Documentation

volatile uint16_t voltage

voltage (magic units)