原创 SysTick配置

SysTick配置<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

1、  选择时钟源；                                                                            SysTick->CTRL（位2）

void SysTick_CLKSourceConfig(u32 SysTick_CLKSource)

2、  设置SysTick优先级；                                                             SCB->SHPR[2] (位31:24)

void NVIC_SystemHandlerPriorityConfig(u32 SystemHandler, u8 SystemHandlerPreemptionPriority, u8 SystemHandlerSubPriority)

3、  装载初始值v，定时时间=v/时钟源频率；                    SysTick->LOAD（位23:0）

void SysTick_SetReload(u32 Reload);

4、  使能SysTick中断。                                                                 SysTick->CTRL（位1）

void SysTick_ITConfig(FunctionalState NewState)

5、  编写中断响应函数

void SysTickHandler(void)

6、  启动计数器                                                                                 SysTick->CTRL (位0)

SysTick_CounterCmd(SysTick_Counter_Enable);

7、  关闭计数器                                                                                 SysTick->CTRL (位0)

SysTick_CounterCmd(SysTick_Counter_Disable);

8、  清除计数器当前值

SysTick_CounterCmd(SysTick_Counter_Clear);                 SysTick->VAL（位23:0）

相关寄存器

SysTick->CTRL (CM3技术参考手册)

<?xml:namespace prefix = v ns = "urn:schemas-microsoft-com:vml" />

SCB->SHPR (CM3技术参考手册)

SysTick->LOAD (CM3技术参考手册)

SysTick-> VAL (CM3技术参考手册)

为什么不能从WORD里直接把图形直接复制过来呢？？