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hw-rollerderby-scoreboard
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jam and period clocks

This commit is contained in:
Neale Pickett 2013-03-11 23:14:30 -06:00
parent 4eea2e956e
commit aee8f96081
1 changed files with 91 additions and 25 deletions
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114
main.c
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@ -6,6 +6,30 @@
// If you want scores to go over 199, you need 8
const int nsr = 6;
volatile bool tick = false; // Set high when clock ticks
uint16_t time = 0; // Tenths of a second elapsed since boot
// Clocks are in deciseconds
uint16_t period_clock = 600 * 30;
uint16_t jam_clock = 600 * 2;
enum {
SETUP,
JAM,
LINEUP,
TIMEOUT
} state = JAM;
#define MODE BIT0
#define SIN BIT1
#define SCLK BIT2
#define XLAT BIT4
// Connect GSCLK to SCLK
// Connect BLANK to XLAT
// TRUST ME, THIS TOTALLY WORKS
#define bit(pin, bit, on) pin = (on ? (pin | bit) : (pin & ~bit))
const uint8_t seven_segment_digits[] = {
#if 0
0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f, 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71
@ -14,20 +38,6 @@ const uint8_t seven_segment_digits[] = {
#endif
};
// seconds/60
volatile uint16_t jiffies = 0;
#define MODE BIT0
#define SIN BIT1
#define SCLK BIT2
#define XLAT BIT3
#define bit(pin, bit, on) pin = (on ? (pin | bit) : (pin & ~bit))
// Connect GSCLK to SCLK
// Connect BLANK to XLAT
#define mode(on) bit(P1OUT, MODE, on)
#define sin(on) bit(P1OUT, SIN, on)
#define sclk(on) bit(P1OUT, SCLK, on)
@ -115,11 +125,65 @@ setup_dc()
mode(false);
}
/*
* Update all the digits
*/
void
draw()
{
write_num(0, 2); // Score B
write_num(jam_clock % 600, 3);
write_num(jam_clock / 600, 1);
// XXX: Do some kind of animation if period_clock < 200
write_num((period_clock / 10) % 60, 2);
write_num((period_clock / 10) / 60, 2);
//write_num(0, 2); // Score A
latch();
pulse();
}
/*
* Run logic for this decisecond
*/
void
loop()
{
if (jam_clock) {
jam_clock -= 1;
}
if (period_clock) {
period_clock -= 1;
}
if (P1IN & BIT3) {
switch (state) {
case JAM:
jam_clock = 300;
state = LINEUP;
break;
default:
jam_clock = 600 * 2;
state = JAM;
break;
}
}
draw();
}
int
main(void)
{
int jiffies = 0;
WDTCTL = WDTPW + WDTHOLD; // Disable Watchdog Timer
P1DIR |= MODE + SIN + SCLK + XLAT + BIT6; // P1 output bits
P1DIR &= ~(BIT3);
P1OUT = 0;
@ -135,11 +199,18 @@ main(void)
// Now actually run
for (;;) {
if ((jiffies % 6) == 0) {
write_num(jiffies / 6, 4);
if (tick) {
tick = false;
jiffies += 1;
latch();
pulse();
if (jiffies == 6) {
jiffies = 0;
time += 1;
loop();
P1OUT ^= BIT6;
}
}
}
}
@ -148,10 +219,5 @@ main(void)
__attribute__((interrupt(TIMER0_A0_VECTOR)))
void timer_a(void)
{
jiffies += 1;
if ((jiffies / 60) % 2) {
P1OUT |= BIT6;
} else {
P1OUT &= ~BIT6;
}
tick = true;
}