had2

#include "stm32f4xx.h"
#include <stdio.h>

#define setbit(reg, bit) ((reg) |= (1U << (bit)))       // set bit to 1
#define clrbit(reg, bit) ((reg) &= (~(1U << (bit))))    // set bit to 0
#define tglbit(reg, bit) ((reg) ^= (1U << (bit)))       // flip bit
#define getbit(reg, bit) ((reg & (1U << bit))>>bit)     // read bit

/*
MULTIFUNCTION SHIELD
4 red LEDs : PIN 10, 11, 12, 13
4-digit 7-sement LED : Latch 4, Clock 7, Data 8

Zápis do Latch – pin 4 (start zápisu LOW, konec HIGH)
Hodinový pulz (takt) – pin 7
Sériová data – pin 8 – zápis 2× 8 bitů (2× Byte)
(první Byte – data rozsvícených LED – rozsvícení LOW, vypnutí HIGH)

http://kabinet.fyzika.net/dilna/ARDUINO/Popis-Arduino_Multi-function_Shield.pd
fmail

help code

# Write a decimal number between 0 and 9 to one of the 4 digits of the display
void WriteNumberToSegment(byte Segment, byte Value){
    digitalWrite(LATCH_DIO,LOW);
    shiftOut(DATA_DIO, CLK_DIO, MSBFIRST, SEGMENT_MAP[Value]);
    shiftOut(DATA_DIO, CLK_DIO, MSBFIRST, SEGMENT_SELECT[Segment] );
    digitalWrite(LATCH_DIO,HIGH);
}



*/





int cil;

void WriteToSegment(){      //zapis do segmentu
    clrbit(GPIOB->ODR,5);   // latch
    for(int i=15;i>(-1);i--){
        if(getbit(cil,i)==1)
            setbit(GPIOA->ODR, 9);  // data
        else
            clrbit(GPIOA->ODR,9);   // data

        setbit(GPIOA->ODR,8);   // clock
        clrbit(GPIOA->ODR,8);   // clock
    }
    setbit(GPIOB->ODR,5);   //latch
}



void initTIM2(void)
{
    setbit(RCC->APB1ENR, 0);    /* enable Clock for TIM2 */
    TIM2->PSC = 50;              /* prescaler - doplnte podle potreby */
    TIM2->ARR = 63999;              /* autoreload - doplnte podle potreby */
    setbit(TIM2->CR1, 0);       /* enable TIM2 */
    clrbit(TIM2->SR, 0);      /* status TIM2 */
}

void initLED(void){

    //Povoleni hodin
    setbit(RCC->AHB1ENR, 0);
    setbit(RCC->AHB1ENR, 1);


    //Nastaveni pinu na digitalni output
    setbit(GPIOB->MODER, 10);
    clrbit(GPIOB->MODER, 11);

    setbit(GPIOA->MODER, 12);
    clrbit(GPIOA->MODER, 13);

    setbit(GPIOA->MODER, 14);
    clrbit(GPIOA->MODER, 15);

    setbit(GPIOB->MODER, 12);
    clrbit(GPIOB->MODER, 13);

    setbit(GPIOA->MODER, 16);
    clrbit(GPIOA->MODER, 17);

    setbit(GPIOA->MODER, 18);
    clrbit(GPIOA->MODER, 19);
}

// Sériová data – pin 8 – zápis 2× 8 bitů (2× Byte)
// 1. byte: the 8 segment information (rozsvícení LOW, vypnutí HIGH)
// 2. byte: 00001111 - show on all displays
void segment(int v){
    switch (v){
        case 1:
            cil=0b1111111000001111;
                WriteToSegment();
            break;
        case 2:
            cil=0b1111110100001111;
                WriteToSegment();
            break;
        case 3:
            cil=0b1111101100001111;
                WriteToSegment();
            break;
        case 4:
            cil=0b1111011100001111;
                WriteToSegment();
            break;
        case 5:
            cil=0b1110111100001111;
                WriteToSegment();
            break;
        case 6:
            cil=0b1101111100001111;
                WriteToSegment();
            break;
        case 7:
            cil=0b0111111100001111;
                WriteToSegment();
            break;
        default:
            cil=0b111111100001111;
                WriteToSegment();
            break;
    }
}

//prednastavene hodnoty pro led diody(4stavy)
void had(int i){
    switch (i){
        case 1:
            clrbit(GPIOA->ODR,5);
            setbit(GPIOA->ODR,6);
            setbit(GPIOA->ODR,7);
            setbit(GPIOB->ODR,6);
            break;
        case 2:
            setbit(GPIOA->ODR,5);
            clrbit(GPIOA->ODR,6);
            setbit(GPIOA->ODR,7);
            setbit(GPIOB->ODR,6);
            break;
        case 3:
            setbit(GPIOA->ODR,5);
            setbit(GPIOA->ODR,6);
            clrbit(GPIOA->ODR,7);
            setbit(GPIOB->ODR,6);
            break;
        default:
            setbit(GPIOA->ODR,5);
            setbit(GPIOA->ODR,6);
            setbit(GPIOA->ODR,7);
            clrbit(GPIOB->ODR,6);
            break;
    }
}

//hlavni chod programu
int main(void){

    int i=1;
    int v=1;

    initLED();
    initTIM2();

    while (1){
        if(getbit(TIM2->SR, 0)){
            clrbit(TIM2->SR, 0);
            had(i);
            i++;
            if(i>4) i=1;
            segment(v);
            v++;
            if(v>6) v=1;
        }
    }
}