di0ib/tmk_keyboard_custom
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Port timer to mbed

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This commit is contained in:
tmk 2014-06-16 11:12:45 +09:00
parent 89d19ff866
commit d7004b97d8
4 changed files with 42 additions and 20 deletions
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2
common.mk
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@ -7,7 +7,7 @@ SRC += $(COMMON_DIR)/host.c \
$(COMMON_DIR)/action_layer.c \ $(COMMON_DIR)/action_layer.c \
$(COMMON_DIR)/action_util.c \ $(COMMON_DIR)/action_util.c \
$(COMMON_DIR)/keymap.c \ $(COMMON_DIR)/keymap.c \
$(COMMON_DIR)/timer.c \ $(COMMON_DIR)/avr/timer.c \
$(COMMON_DIR)/print.c \ $(COMMON_DIR)/print.c \
$(COMMON_DIR)/bootloader.c \ $(COMMON_DIR)/bootloader.c \
$(COMMON_DIR)/suspend.c \ $(COMMON_DIR)/suspend.c \

1
common/timer.c → common/avr/timer.c
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@ -18,6 +18,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#include <avr/io.h> #include <avr/io.h>
#include <avr/interrupt.h> #include <avr/interrupt.h>
#include <stdint.h> #include <stdint.h>
#include "timer_avr.h"
#include "timer.h" #include "timer.h"

40
common/mbed/timer.c Normal file
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@ -0,0 +1,40 @@
#include "cmsis.h"
#include "timer.h"
/* Mill second tick count */
volatile uint32_t timer_count = 0;
/* Timer interrupt handler */
void SysTick_Handler(void) {
timer_count++;
}
void timer_init(void)
{
SysTick_Config(SystemCoreClock / 1000); /* 1ms tick */
}
void timer_clear(void)
{
timer_count = 0;
}
uint16_t timer_read(void)
{
return (uint16_t)(timer_count & 0xFFFF);
}
uint32_t timer_read32(void)
{
return timer_count;
}
uint16_t timer_elapsed(uint16_t last)
{
return TIMER_DIFF_16(timer_read(), last);
}
uint32_t timer_elapsed32(uint32_t last)
{
return TIMER_DIFF_32(timer_read32(), last);
}

19
common/timer.h
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@ -20,25 +20,6 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#include <stdint.h> #include <stdint.h>
#ifndef TIMER_PRESCALER
# if F_CPU > 16000000
# define TIMER_PRESCALER 256
# elif F_CPU > 2000000
# define TIMER_PRESCALER 64
# elif F_CPU > 250000
# define TIMER_PRESCALER 8
# else
# define TIMER_PRESCALER 1
# endif
#endif
#define TIMER_RAW_FREQ (F_CPU/TIMER_PRESCALER)
#define TIMER_RAW TCNT0
#define TIMER_RAW_TOP (TIMER_RAW_FREQ/1000)
#if (TIMER_RAW_TOP > 255)
# error "Timer0 can't count 1ms at this clock freq. Use larger prescaler."
#endif
#define TIMER_DIFF(a, b, max) ((a) >= (b) ? (a) - (b) : (max) - (b) + (a)) #define TIMER_DIFF(a, b, max) ((a) >= (b) ? (a) - (b) : (max) - (b) + (a))
#define TIMER_DIFF_8(a, b) TIMER_DIFF(a, b, UINT8_MAX) #define TIMER_DIFF_8(a, b) TIMER_DIFF(a, b, UINT8_MAX)
#define TIMER_DIFF_16(a, b) TIMER_DIFF(a, b, UINT16_MAX) #define TIMER_DIFF_16(a, b) TIMER_DIFF(a, b, UINT16_MAX)