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107 lines
1.9 KiB
107 lines
1.9 KiB
#include <stdint.h>
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#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 "display.h"
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#include "spi.h"
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#include "usb.h"
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#include "softtimer.h"
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#include "main.h"
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uint8_t newThermoData = 1;
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uint16_t thermoData[];
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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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// enable softtimer isr
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TIMSK1 |= _BV(TOIE1);
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// init LCD:
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lcd_init(1);
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lcd_clrscr(1);
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spi_init();
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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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hardinit();
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softinit();
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usbInit();
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//hard-reset usb for debugging ease #TODO:remove
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cli();
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usbDeviceDisconnect();
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_delay_us(100);
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usbDeviceConnect();
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sei();
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display_gotoyx(0,0);
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display_puts("\nstart");
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display_update();
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for(;;){
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usbPoll();
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SOFTTIMER(2,800) {
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uint16_t recv;
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for(int i=0; i<4; i++) {
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thermoData[i] = spi_master_transceive(7, i, 0);
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}
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newThermoData = 1;
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}
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SOFTTIMER(1,250) {
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displayTemperature();
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}
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}
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}
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ISR(TIMER1_OVF_vect,ISR_NOBLOCK){
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uint16_t tmp;
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tmp=timer1_acc;
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tmp++;
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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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ATOMIC_BLOCK(ATOMIC_FORCEON){
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timer1_acc=tmp;
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}
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}
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