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added PS/2 to USB converter use V-USB as protocol stack

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This commit is contained in:
tmk 2011-01-29 00:44:05 +09:00
parent c07408a447
commit 4f5f1a53d4
40 changed files with 10003 additions and 18 deletions
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14
timer.c
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@ -3,7 +3,7 @@
#include <stdint.h>
#include "timer.h"
uint16_t timer_count = 0;
volatile uint16_t timer_count = 0;
// Configure timer 0 to generate a timer overflow interrupt every
// 256*1024 clock cycles, or approx 61 Hz when using 16 MHz clock
@ -19,20 +19,21 @@ void timer_init(void)
inline
void timer_clear(void)
{
uint8_t sreg = SREG;
cli();
timer_count = 0;
sei();
SREG = sreg;
}
inline
uint16_t timer_read(void)
{
uint8_t _sreg = SREG;
uint16_t t;
uint8_t sreg = SREG;
cli();
t = timer_count;
SREG = _sreg;
SREG = sreg;
return t;
}
@ -40,12 +41,12 @@ uint16_t timer_read(void)
inline
uint16_t timer_elapsed(uint16_t last)
{
uint8_t _sreg = SREG;
uint16_t t;
uint8_t sreg = SREG;
cli();
t = timer_count;
SREG = _sreg;
SREG = sreg;
return TIMER_DIFF(t, last);
}
@ -58,4 +59,3 @@ ISR(TIMER0_OVF_vect)
{
timer_count++;
}