94 lines
2.0 KiB
C
94 lines
2.0 KiB
C
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#include "board.h"
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#include "stm32f10x.h"
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static int init(timer_def *t){
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static int inited=0;
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if(inited!=0) return 0;
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inited=1;
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TIM_TimeBaseInitTypeDef timer;
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE );
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NVIC_DisableIRQ(TIM4_IRQn);
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TIM_DeInit(TIM4);
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timer.TIM_Period = 10000-1; //1s
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timer.TIM_Prescaler = 7200-1;//1K; //预分频72MHz主频，分频后时钟周期0.1ms
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timer.TIM_ClockDivision = TIM_CKD_DIV1; //分频
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timer.TIM_CounterMode = TIM_CounterMode_Up; //向上计数
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timer.TIM_RepetitionCounter=0;
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TIM_TimeBaseInit(TIM4,&timer);
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TIM_SetCounter(TIM4,0);
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TIM_ARRPreloadConfig(TIM4, ENABLE);
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TIM_SelectOutputTrigger(TIM4,TIM_TRGOSource_Update);
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// TIM_Cmd(TIM4, ENABLE);
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE );
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NVIC_DisableIRQ(TIM5_IRQn);
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TIM_DeInit(TIM5);
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timer.TIM_Period = 0xffff;//
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timer.TIM_Prescaler = 0;//不分频
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timer.TIM_ClockDivision = TIM_CKD_DIV1;
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timer.TIM_CounterMode = TIM_CounterMode_Up; //向上计数
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timer.TIM_RepetitionCounter=0;
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TIM_TimeBaseInit(TIM5,&timer);
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TIM_SetCounter(TIM5,0);
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TIM_ARRPreloadConfig(TIM5, ENABLE);
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TIM_ITRxExternalClockConfig(TIM5, TIM_TS_ITR2);
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// TIM_Cmd(TIM5, ENABLE);
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return 0;
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}
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static int deinit(timer_def *t){
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TIM_DeInit(TIM4);
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TIM_DeInit(TIM5);
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return 0;
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}
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static uint32_t read(timer_def *t)
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{
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uint32_t ms;
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ms=TIM_GetCounter(TIM4)/10+TIM_GetCounter(TIM5)*1000;
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return ms;
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}
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static int write(timer_def *t,const uint32_t value)
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{
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uint32_t v;
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TIM_Cmd(TIM4,DISABLE);
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TIM_Cmd(TIM5,DISABLE);
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v=(value%1000)*10;
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TIM4->CNT = v;
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TIM4->EGR |= TIM_EventSource_Update;
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v=value/1000;
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TIM5->CNT = v;
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TIM5->EGR |= TIM_EventSource_Update;
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TIM_Cmd(TIM4,ENABLE);
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TIM_Cmd(TIM5,ENABLE);
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return 0;
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}
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static int start(timer_def *t)
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{
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TIM_Cmd(TIM4,ENABLE);
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TIM_Cmd(TIM5,ENABLE);
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return 0;
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}
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static int stop(timer_def *t)
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{
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TIM_Cmd(TIM4,DISABLE);
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TIM_Cmd(TIM5,DISABLE);
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return 0;
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}
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timer_init_export(timer,init,deinit,read,write,stop,start,0);
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