Версия 13:08, 9 февраля 2010

@@ Строка 1: / Строка 1: @@
- #include <stdint.h>
- #include <avr/io.h>
- #include <avr/interrupt.h>
- //MISO - RCK;
- #define LATCH 0x40
-                                   /*0*/ /*1*/ /*2*/ /*3*/ /*4*/ /*5*/ /*6*/ /*7*/ /*8*/ /*9*/ /*.*/
- static const uint8_t LEDS[11] = { 0x03, 0x9F, 0x25, 0x0D, 0x99, 0x49, 0x41, 0x1F, 0x01, 0x09, 0xFE };
- static volatile uint8_t counts[4];
- static volatile uint16_t data = 0;
- void Indicate(uint16_t data)
- {
-    counts[3] = data % 10;
-    data /= 10;
-    counts[2] = data % 10;
-    data /= 10;
-    counts[1] = data % 10;
-    data /= 10;
-    counts[0] = data % 10;
-    data /= 10;
-    SPCR |= _BV(SPE);
-    register uint8_t j;
-    for (j = 0; j < 4; j++)
-    {
-        SPDR = ( j == 1 ) ? ( LEDS[counts[j]] & LEDS[10] ) : ( LEDS[counts[j]] );
-        while (!(SPSR & _BV(SPIF)));
-    }
-    SPCR &= ~_BV(SPE);
-    PORTB |= LATCH;
-    PORTB &= ~LATCH;
- }
- ISR (TIMER0_COMP_vect)
- {
-    if  (data == 10000)
-        data = 0;
-    Indicate(data++);
- }
- int main (void)
- {
-    DDRB  = 0xff;
-    PORTB = 0x00;
-    SPCR  = _BV(SPE) | _BV(MSTR) | _BV(SPR1);
-    TCCR0 = _BV(WGM01) | _BV(CS02) | _BV(CS00);
-    TIMSK = _BV(OCIE0);
-    OCR0  = 78;
-    //78'''.125''' t = 0.01 s * 8/1024 MHz;
-    sei();
-    while (1);
- }