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101 lines
1.9 KiB
101 lines
1.9 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 <usbdrv/usbdrv.h>
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#include "main.h"
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#include "display.h"
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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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*/
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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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// 1wire needs no own init, bus search is done in softinit
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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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usbMsgLen_t usbFunctionSetup(uchar data[8])
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{
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usbRequest_t *rq = (void *)data;
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static uchar dataBuffer[4]; /* buffer must stay valid when usbFunctionSetup returns */
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if(rq->bRequest == 1){ /* echo -- used for reliability tests */
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dataBuffer[0] = rq->wValue.bytes[0];
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dataBuffer[1] = rq->wValue.bytes[1];
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dataBuffer[2] = rq->wIndex.bytes[0];
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dataBuffer[3] = rq->wIndex.bytes[1];
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usbMsgPtr = dataBuffer; /* tell the driver which data to return */
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return 4;
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}
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return 0; /* default for not implemented requests: return no data back to host */
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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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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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}
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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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