Индикация на трёх семи сегментных трёх знаковых светодиодных индикаторах через SPI

Материал из Automata.

(Различия между версиями)
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(Отмена правки № 1787 участника Kern (обсуждение))
 
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#include <stdint.h>
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#include <avr/io.h>
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#include <avr/interrupt.h>
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//MISO - RCK;
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#define LATCH 0x40
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/*0*/ /*1*/ /*2*/ /*3*/ /*4*/ /*5*/ /*6*/ /*7*/ /*8*/ /*9*/ /*.*/
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static const uint8_t LEDS[11] = {~0x5f,~0x42,~0x37,~0x76,~0x6a,~0x7c,~0x7d,~0x46,~0x7f,~0x7e,~0x00 };
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static volatile uint8_t i = 0;
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void Indicate (void)
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{
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SPCR |= _BV(SPE);
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register uint8_t k;
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for (k = 0; k < 9; k++)
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{
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SPDR = i == k ? LEDS[k+1] : 0xFF;
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while (!(SPSR & _BV(SPIF)));
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}
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SPCR &= ~_BV(SPE);
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PORTB |= LATCH;
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PORTB &= ~LATCH;
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}
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ISR (TIMER1_COMPA_vect)
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{
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Indicate();
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if (i++ == 9)
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i = 0;
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}
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int main (void)
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{
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DDRB = 0xff;
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PORTB = 0x00;
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SPCR = _BV(SPE) | _BV(MSTR) | _BV(SPR1);
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TCCR1B = _BV(WGM12) | _BV(CS12);
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TIMSK = _BV(OCIE1A);
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OCR1A = 11250;
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sei();
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while (1);
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}

Текущая версия

#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] = {~0x5f,~0x42,~0x37,~0x76,~0x6a,~0x7c,~0x7d,~0x46,~0x7f,~0x7e,~0x00 };
static volatile uint8_t i = 0;

void Indicate (void)
{
   SPCR |= _BV(SPE);

   register uint8_t k;
   for (k = 0; k < 9; k++)
   {
       SPDR = i == k  ? LEDS[k+1] : 0xFF;
       while (!(SPSR & _BV(SPIF)));
   }

   SPCR &= ~_BV(SPE);

   PORTB |= LATCH;
   PORTB &= ~LATCH;
}

ISR (TIMER1_COMPA_vect)
{
   Indicate();
   if (i++ == 9)
       i = 0;
}

int main (void)
{
   DDRB  = 0xff;
   PORTB = 0x00;

   SPCR  = _BV(SPE) | _BV(MSTR) | _BV(SPR1);

   TCCR1B = _BV(WGM12) | _BV(CS12);
   TIMSK  = _BV(OCIE1A);
   OCR1A  = 11250;

   sei();

   while (1);
}
Получено с http://automata.sgu.ru/wiki/%C3%90%CB%9C%C3%90%C2%BD%C3%90%C2%B4%C3%90%C2%B8%C3%90%C2%BA%C3%90%C2%B0%C3%91%E2%80%A0%C3%90%C2%B8%C3%91%C2%8F_%C3%90%C2%BD%C3%90%C2%B0_%C3%91%E2%80%9A%C3%91%E2%82%AC%C3%91%E2%80%98%C3%91%E2%80%A6_%C3%91%C2%81%C3%90%C2%B5%C3%90%C2%BC%C3%90%C2%B8_%C3%91%C2%81%C3%90%C2%B5%C3%90%C2%B3%C3%90%C2%BC%C3%90%C2%B5%C3%90%C2%BD%C3%91%E2%80%9A%C3%90%C2%BD%C3%91%E2%80%B9%C3%91%E2%80%A6_%C3%91%E2%80%9A%C3%91%E2%82%AC%C3%91%E2%80%98%C3%91%E2%80%A6_%C3%90%C2%B7%C3%90%C2%BD%C3%90%C2%B0%C3%90%C2%BA%C3%90%C2%BE%C3%90%C2%B2%C3%91%E2%80%B9%C3%91%E2%80%A6_%C3%91%C2%81%C3%90%C2%B2%C3%90%C2%B5%C3%91%E2%80%9A%C3%90%C2%BE%C3%90%C2%B4%C3%90%C2%B8%C3%90%C2%BE%C3%90%C2%B4%C3%90%C2%BD%C3%91%E2%80%B9%C3%91%E2%80%A6_%C3%90%C2%B8%C3%90%C2%BD%C3%90%C2%B4%C3%90%C2%B8%C3%90%C2%BA%C3%90%C2%B0%C3%91%E2%80%9A%C3%90%C2%BE%C3%91%E2%82%AC%C3%90%C2%B0%C3%91%E2%80%A6_%C3%91%E2%80%A1%C3%90%C2%B5%C3%91%E2%82%AC%C3%90%C2%B5%C3%90%C2%B7_SPI
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