1.configPRIO_BITS会被定义为:__NVIC_PRIO_BITS, 这个值在CMSIS中有定义,用来对后续中断 ( Pend_SV 和 SYSTICK )进行配置。 2.configLIBRARY_LOWEST_INTERRUPT_PRIORITY,用来配置当前中断条件下的最低优先级 configKERNEL_INTERRUPT_PRIORITY,实际传递给相关寄存器的值 3.configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY...
启动FreeRTOS后,中断优先级分组策略自动设置为4位全部用于前抢占优先级,所以抢占优先级编号是0到15.这个设置对于文件FreeRTOSConfig.h中的参数configPRIO_BITS,默认定义如下: image-20231206204323719 这个参数在CubeMX中不能修改,固定为4,也就是分组策略使用4位抢占优先级。 在CubeMX中设置FreeRTOS的“config”参数时,...
#define configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY 5 #define configKERNEL_INTERRUPT_PRIORITY ( configLIBRARY_LOWEST_INTERRUPT_PRIORITY << (8 - configPRIO_BITS) ) /* 240 */ #define configMAX_SYSCALL_INTERRUPT_PRIORITY ( configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY << (8 - configPRIO_BITS) ) ...
See http://www.FreeRTOS.org/RTOS-Cortex-M3-M4.html. */ #define configMAX_SYSCALL_INTERRUPT_PRIORITY ( configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY << (8 - configPRIO_BITS) ) configMAX_SYSCALL_INTERRUPT_PRIORITY 高于此优先级的中断,不能被禁止。 测试过程 开启定时器TIM6和TIM7,两个定时器每隔...
由于Cortex-M 系列处理器的中断优先级数字越大其逻辑优先级越低,因此配置起来令人困惑。以 Coretex-M3 内核的STM32系列单片机为例,在FreeRTOS例程包里找到对应的例程,里面的 FreeRTOSConfig.h 中能找到以下配置: /* 指定优先级位数 */#ifdef __NVIC_PRIO_BITS#define configPRIO_BITS __NVIC_PRIO_BITS#else#...
(1)configPRIO_BITS此宏用来设置MCU使用几位优先级。 (2)configLIBRARY_LOWEST_INTERRUPT_PRIORITY此宏用来设置最低优先级。 (3)configKEYNEL_INTERRUPT_PRIORITY此宏是configLIBRARY_LOWEST_INTERRUPT_PRIORITY左移得来的。 此宏用来配置系统调用(PendSV)和滴答定时器(Systick)的中断优先级。
#define configKERNEL_INTERRUPT_PRIORITY ( configLIBRARY_LOWEST_INTERRUPT_PRIORITY << (8 - configPRIO_BITS) ) 1. 2. 3. 该宏用来设置内核中断优先级。 6.4 configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY /* The highest interrupt priority that can be used by any interrupt service ...
configPRIO_BITS 4 #endif #define configLIBRARY_LOWEST_INTERRUPT_PRIORITY 15 //中断最低优先级 #define configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY 5 //系统可管理的最高中断优先级 #define configKERNEL_INTERRUPT_PRIORITY ( configLIBRARY_LOWEST_INTERRUPT_PRIORITY << (8 - configPRIO_BITS) ) #...
/* __BVIC_PRIO_BITS will be specified when CMSIS is beingused. */ #defineconfigPRIO_BITS __NVIC_PRIO_BITS#else #defineconfigPRIO_BITS 4 /* 15 priority levels */#endif /* The lowest interrupt priority thatcan be used in a call to a "set priority"function. */#define configLIBRARY_...
#defineconfigPRIO_BITS 4 /* 15 priority levels */#endif /* The lowest interrupt priority thatcan be used in a call to a "set priority"function. */#define configLIBRARY_LOWEST_INTERRUPT_PRIORITY 0x0f /* The highest interrupt priority thatcan be used by any interrupt serviceroutine that mak...