neale/hw-rollerderby-scoreboard
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trying to figure out how to get 1s in .1s intervals

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This commit is contained in:
Neale Pickett 2013-05-04 20:39:31 -06:00
parent 65cbd98027
commit 27a9eb281a
4 changed files with 5 additions and 7 deletions
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2
Makefile.avr
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@ -12,7 +12,7 @@ LDFLAGS += -mmcu=$(MCU)
AVDFLAGS += -p $(MCU)
AVDFLAGS += -c usbtiny
FUSES += -U lfuse:w:0x7f:m
FUSES += -U lfuse:w:0xff:m
FUSES += -U hfuse:w:0xd9:m
FUSES += -U efuse:w:0xff:m

2
avr.c
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@ -20,7 +20,7 @@ ISR(TIM0_OVF_vect)
m += (256 * 64);
if (m >= JIFFY_uS) {
m %= JIFFY_uS;
m -= JIFFY_uS;
tick = true;
jiffies += 1;
}

1
avr.h
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@ -5,7 +5,6 @@
#include <avr/io.h>
#include <avr/interrupt.h>
// Make sure JIFFY_uS is going to be an integer and not a float!
#define JIFFIES_PER_SECOND 100
#define JIFFY_uS (1000000 / JIFFIES_PER_SECOND)

7
main.c
View file

@ -241,17 +241,16 @@ void
loop()
{
uint32_t i;
if (tick) {
tick = false;
update_controller();
if (jiffies % 66 == 0) {
PORTB ^= 0xff;
}
if (jiffies % (JIFFIES_PER_SECOND / 10) == 0) {
if (jiffies % JIFFIES_PER_SECOND == 0) {
PORTB ^= 0xff;
}
switch (state) {
case SETUP:
break;