11.6:完善多任务和消息队列机制。
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64
STM32/Environment_Node/System/SysTick.c
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64
STM32/Environment_Node/System/SysTick.c
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#include "SysTick.h"
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#if SYSTEM == SYSTEM_NONE
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//<2F><>ʼ<EFBFBD><CABC><EFBFBD>ӳٺ<D3B3><D9BA><EFBFBD>
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//SYSTICK<43><4B>ʱ<EFBFBD>ӹ̶<D3B9>ΪAHBʱ<42>ӵ<EFBFBD>1/8
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//SYSCLK:ϵͳʱ<CDB3><CAB1>Ƶ<EFBFBD><C6B5>
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void vSysTickInit(uint8_t ucSYSCLK)
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{
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SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK_Div8);
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xUcFacInit.ucFacUs=ucSYSCLK/8;
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xUcFacInit.usFacMs=(uint16_t)xUcFacInit.ucFacUs*1000;
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}
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//<2F><>ʱnus
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//nusΪҪ<CEAA><D2AA>ʱ<EFBFBD><CAB1>us<75><73>.
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void vDelayUs(uint32_t ulNus)
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{
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uint32_t ulTemp;
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SysTick->LOAD=ulNus*xUcFacInit.ucFacUs; //ʱ<><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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SysTick->VAL=0x00; //<2F><><EFBFBD>ռ<EFBFBD><D5BC><EFBFBD><EFBFBD><EFBFBD>
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SysTick->CTRL|=SysTick_CTRL_ENABLE_Msk ; //<2F><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD>
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do
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{
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ulTemp=SysTick->CTRL;
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} while((ulTemp&0x01)&&!(ulTemp&(1<<16))); //<2F>ȴ<EFBFBD>ʱ<EFBFBD>䵽<EFBFBD><E4B5BD>
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SysTick->CTRL&=~SysTick_CTRL_ENABLE_Msk; //<2F>رռ<D8B1><D5BC><EFBFBD><EFBFBD><EFBFBD>
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SysTick->VAL =0X00; //<2F><><EFBFBD>ռ<EFBFBD><D5BC><EFBFBD><EFBFBD><EFBFBD>
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}
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//<2F><>ʱnms
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//ע<><D7A2>nms<6D>ķ<EFBFBD>Χ
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//SysTick->LOADΪ24λ<34>Ĵ<EFBFBD><C4B4><EFBFBD>,<2C><><EFBFBD><EFBFBD>,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱΪ:
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//nms<=0xffffff*8*1000/SYSCLK
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//SYSCLK<4C><4B>λΪHz,nms<6D><73>λΪms
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//<2F><>72M<32><4D><EFBFBD><EFBFBD><EFBFBD><EFBFBD>,nms<=1864
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/**
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* @brief <20><><EFBFBD>뼶<EFBFBD><EBBCB6>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD>
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* @note <20><><EFBFBD><EFBFBD>Systick<63><6B>ʱ<EFBFBD><CAB1>Ϊ24λ<34><CEBB>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>װ<EFBFBD>ص<EFBFBD><D8B5><EFBFBD><EFBFBD><EFBFBD>ֵΪ0xFFFFFF<46><46>Ҳ<EFBFBD><D2B2><EFBFBD><EFBFBD>16777215<31><35><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD>ֵ<EFBFBD><D6B5><EFBFBD><EFBFBD>0xFFFFFF<46><46><EFBFBD><EFBFBD>ʵ<EFBFBD>ʼ<EFBFBD><CABC>ص<EFBFBD>ֵ<EFBFBD><D6B5>ȡģ<C8A1><C4A3><EFBFBD><EFBFBD>ֵ<EFBFBD><D6B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱʱ<CAB1><CAB1><EFBFBD><EFBFBD><EFBFBD>̡<EFBFBD>
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* <20><><EFBFBD>Գ<EFBFBD><D4B3><EFBFBD>1.864s<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD>ᵼ<EFBFBD>¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>¶<EFBFBD>ʱΪxms-16777215<31>Ľ<EFBFBD><C4BD><EFBFBD><EFBFBD><EFBFBD>
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* @note <20><><EFBFBD>º<EFBFBD><C2BA><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><D0B6><EFBFBD>ʱ<EFBFBD>Ƿ<C7B7><F1B3ACB9><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֳɶ<D6B3><C9B6><EFBFBD>1000ms<6D><73><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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* @param None
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* @retval None
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*/
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void vDelayMs(uint16_t usNms)
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{
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uint32_t ulTemp;
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while (usNms)
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{
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uint16_t current = (usNms > 1000) ? 1000 : usNms;
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usNms -= current;
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SysTick->LOAD = (uint32_t)current * xUcFacInit.usFacMs;
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SysTick->VAL = 0x00;
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SysTick->CTRL |= SysTick_CTRL_ENABLE_Msk;
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do
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{
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ulTemp = SysTick->CTRL;
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} while ((ulTemp & 0x01) && !(ulTemp & (1 << 16)));
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SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk;
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SysTick->VAL = 0X00;
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}
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}
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#endif
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