From a074364c3731d66b56d988c8a6c960a83ea0e0a1 Mon Sep 17 00:00:00 2001 From: tmk Date: Fri, 10 Apr 2015 01:32:04 +0900 Subject: Squashed 'tmk_core/' content from commit 05caacc git-subtree-dir: tmk_core git-subtree-split: 05caaccec92694bb24c8c3c3a9940b96efd4605c --- common/mbed/timer.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 common/mbed/timer.c (limited to 'common/mbed/timer.c') diff --git a/common/mbed/timer.c b/common/mbed/timer.c new file mode 100644 index 0000000000..c357ceb786 --- /dev/null +++ b/common/mbed/timer.c @@ -0,0 +1,41 @@ +#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) +{ + timer_count = 0; + 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); +} -- cgit v1.2.3