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112 lines
2.4 KiB
112 lines
2.4 KiB
#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <avr/pgmspace.h>
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#include <avr/eeprom.h>
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#include <util/delay.h>
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#include <util/atomic.h>
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#include <stdio.h>
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#include <usbdrv/usbdrv.h>
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#include "main.h"
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#include "display.h"
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#include "spi.h"
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#include "usb.h"
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#define SOFTTIMERNUMS 4
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uint16_t softtimer_last[SOFTTIMERNUMS];
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void softtimer_reset(uint8_t timernum){
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softtimer_last[SOFTTIMERNUMS] = timer1_acc;
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}
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uint8_t softtimer(uint8_t timernum, uint16_t interval){
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uint16_t timer1_acc_tmp = timer1_acc; // because of volatile
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if((uint16_t)(timer1_acc_tmp - (uint16_t)(softtimer_last[timernum]) >= interval )){
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softtimer_last[timernum] = timer1_acc_tmp;
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return(1);
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}
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return(0);
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}
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#define SOFTTIMER(n,a) if(softtimer((n),(a*4)))
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void hardinit() {
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/* initializes the hardware */
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DDRB = _BV(1) | _BV(2) | _BV(0);
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DDRC = 0x3f;
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// no pullups; all digital outputs can take care of themselves
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PORTB = 0x00;
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PORTC = 0x00;
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PORTD = 0x00;
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// hardware pwm for brightness/contrast:
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TCCR1A = _BV(COM1A1) | _BV(COM1B1) | _BV(WGM10);
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TCCR1B = _BV(WGM12) | _BV(CS11); // clk/8 prescaler, 4kHz PWM-freq.
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OCR1A = 15; // contrast
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OCR1B = 50; // brightness
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// init LCD:
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lcd_init(1);
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lcd_clrscr(1);
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sei();
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}
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void softinit() {
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lcd_defchar(1, LCD_CHAR_HALFBAR, lcd_halfbar_char);
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lcd_defchar(1, LCD_CHAR_BAR, lcd_bar_char);
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lcd_defchar(1, LCD_CHAR_DEGREE, lcd_degree_char);
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}
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int __attribute__((noreturn)) main(void) {
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int i=0;
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hardinit();
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softinit();
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usbInit();
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display_puts("Hallo, Welt!\n\n");
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display_update();
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for(;;){
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usbPoll();
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SOFTTIMER(1,100){
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updateTemperature();
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}
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thermoData[0]=thermoData[0]+5;
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thermoData[1]=thermoData[1]+15;
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thermoData[2]=thermoData[2]+7;
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thermoData[3]=thermoData[3]+18;
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i++; if(i%200 == 0) newThermoData = 1;
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}
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}
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/*
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ISR(TIMER1_OVF_vect, ISR_NAKED){
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asm volatile ("in %0, %1\n" : "=r" (sreg_store) : "I" (_SFR_IO_ADDR(SREG)));
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timer1_acc++;
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asm volatile ("out %1, %0\n" : "=r" (sreg_store) : "I" (_SFR_IO_ADDR(SREG)));
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reti();
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}*/
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ISR(TIMER1_OVF_vect,ISR_NOBLOCK){
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uint16_t temp;
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temp=timer1_acc;
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temp++;
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ATOMIC_BLOCK(ATOMIC_FORCEON){
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timer1_acc=temp;
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}
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/* the ATOMIC is acutally only needed if timer1_acc is never read from an ISR, which
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* is probably the case.
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* ATOMIC_FORCEON: the ISR_NOBLOCK sets sei() a few cycles before.
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*/
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}
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