78 lines
1.5 KiB
C
78 lines
1.5 KiB
C
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//! \file stm32_sys_tick.c
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//! \author tkl
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//! \date Feb 15, 2012
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//! \brief Source file of the stm32f10x architecture dependent sys tick timer implementation.
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#include <stdint.h>
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#include <stddef.h>
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#include <stdio.h>
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#include "stm32f4xx.h"
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#include "stm32_sys_tick.h"
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#include "stm32f4xx_isr.h"
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struct stm32_sys_tick_obj {
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stm32_sys_tick_cb_t sys_tick_cb;
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void *sys_tick_cb_param;
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};
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static struct stm32_sys_tick_obj stm32_sys_tick_obj;
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int stm32_sys_tick_open(const void *sys_tick) {
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if(sys_tick == NULL)
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return -1;
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struct stm32_sys_tick *this = (struct stm32_sys_tick *)sys_tick;
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uint32_t div = 1000;
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switch(*this->tick_time_base) {
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case STM32_SYS_TICK_TIME_BASE_US:
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div = 1000000;
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break;
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case STM32_SYS_TICK_TIME_BASE_MS:
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div = 1000;
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break;
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default:
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return -1;
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}
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if(SysTick_Config(SystemCoreClock / div))
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return -1;
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return 0;
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}
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int stm32_sys_tick_close(const void *sys_tick)
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{
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if(sys_tick == NULL)
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return -1;
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SysTick->CTRL = 0;
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return 0;
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}
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int stm32_sys_tick_set_cb(const void *sys_tick, const void *callback, const void *param)
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{
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if((sys_tick == NULL) || (callback == NULL))
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return -1;
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stm32_sys_tick_obj.sys_tick_cb = (stm32_sys_tick_cb_t)callback;
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stm32_sys_tick_obj.sys_tick_cb_param = (void*)param;
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return 0;
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}
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void SysTick_Handler(void)
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{
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enter_isr();
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if(stm32_sys_tick_obj.sys_tick_cb != NULL) {
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stm32_sys_tick_cb_t cb = stm32_sys_tick_obj.sys_tick_cb;
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void *param = stm32_sys_tick_obj.sys_tick_cb_param;
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cb(param);
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}
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exit_isr();
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}
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