From 867f115bee190515aa195dc3e58f1c381ea9695b Mon Sep 17 00:00:00 2001 From: tmk Date: Mon, 16 Jun 2014 11:12:45 +0900 Subject: Port timer to mbed --- common/mbed/timer.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 common/mbed/timer.c (limited to 'common/mbed') diff --git a/common/mbed/timer.c b/common/mbed/timer.c new file mode 100644 index 0000000000..a64a77239c --- /dev/null +++ b/common/mbed/timer.c @@ -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); +} -- cgit v1.2.3