TPIC6C595dD

void dsp_init( void)
{
    cbi( SERCK_PORT, SERCK);
    cbi( SERIN_PORT, SERIN);
    cbi( RCK_PORT, RCK);
    sbi( OEN_PORT, OEN);

    sbi( OEN_DDR, OEN);
    sbi( SERCK_DDR, SERCK);
    sbi( SERIN_DDR, SERIN);
    sbi( RCK_DDR, RCK);
}

void kiir( char * s)
{
    unsigned char digit;
    unsigned char abit;
    unsigned char sdigit;

    for (digit=1; digit<=5; digit++)
    {
        sdigit= s[digit];
        for (abit= 8; abit>0; abit--)
        {   if bit_is_set( sdigit, 7) sbi( SERIN_PORT, SERIN);
            else cbi( SERIN_PORT, SERIN);

            sbi( SERCK_PORT, SERCK);
            sdigit<<=1;
            cbi( SERCK_PORT, SERCK);
        }
    }

    sbi( RCK_PORT, RCK);
    sbi( RCK_PORT, RCK);
    cbi( RCK_PORT, RCK);

    cbi( OEN_PORT, OEN);
}