void main(void)
{
unsigned char i, data;
main_init();
hc595_init();
// Blank output
hc595_write_byte(0x00);
hc595_write_byte(0xff);
hc595_latch();
hc595_oe();
__enable_interrupt();
i = 1;
while(1) {
if (switch0_state) {
hh++;
if (hh > 23) hh = 0;
switch0_state = 0;
time_set = 1;
}
if (switch1_state) {
mm++;
if (mm > 59) mm = 0;
ss = 0;
switch1_state = 0;
time_set = 1;
}
// Continuously scan multiplexed display
// Assert the current digit's anode
hc595_write_byte(~i);
// Select correct data for current digit
switch(i) {
case 1:
data = digits[hh / 10];
break;
case 2:
data = digits[hh % 10];
// Toggle the middle decimal point as a seconds heartbeat
if (ss % 2) data |= 0x80;
break;
case 4:
data = digits[mm / 10];
break;
case 8:
data = digits[mm % 10];
break;
}
// flash if time not set
if ((!time_set) && (ss%2)) {
data = 0;
}
hc595_write_byte(data);
hc595_latch();
// move on to the next digit
i <<= 1;
if (i>8) i = 1;
}
}
void hc595_display(uint8_t data[])
{
hc595_write_byte(0x01);
hc595_write_byte(seg_table_n[data[7]]);
hc595_latch();
//HC595_DELAY
hc595_write_byte(0x02);
hc595_write_byte(seg_table_n[data[6]]);
hc595_latch();
//HC595_DELAY
hc595_write_byte(0x04);
hc595_write_byte(seg_table_n[data[5]]);
hc595_latch();
//HC595_DELAY
hc595_write_byte(0x08);
hc595_write_byte(seg_table_n[data[4]]);
hc595_latch();
//HC595_DELAY
hc595_write_byte(0x10);
hc595_write_byte(seg_table_n[data[3]]);
hc595_latch();
//HC595_DELAY
hc595_write_byte(0x20);
hc595_write_byte(seg_table_n[data[2]]);
hc595_latch();
//HC595_DELAY
hc595_write_byte(0x40);
hc595_write_byte(seg_table_n[data[1]]);
hc595_latch();
//HC595_DELAY
hc595_write_byte(0x80);
hc595_write_byte(seg_table_n[data[0]]);
hc595_latch();
//HC595_DELAY
}
