maximum system call (or maximum API call) interrupt priority. Interrupts that are above the maximum system call priority are keep permanently enabled, even when the RTOS kernel is in a critical section, but cannot make any calls to FreeRTOS API functions. If configASSERT() is defined in FreeR...
maximum system call (or maximum API call) interrupt priority. Interrupts that are above the maximum system call priority are keep permanently enabled, even when the RTOS kernel is in a critical section, but cannot make any calls to FreeRTOS API functions. If configASSERT() is defined in FreeR...
configenfort_system_calls_from_kernel_only可以定义为1,以防止任何来自内核代码外部的特权升级(当进入中断时由硬件本身执行的升级除外)。当FreeRTOSConfig.h中的configENFORCE_SYSTEM_CALLS_FROM_KERNEL_ONLY设置为1时,需要从链接器脚本中导出变量 syscalls_flash_start 和 syscalls_flash_end ,分别表示系统调用内存的...
13 system call (or maximum API call) interrupt priority. Interrupts that are 14 above the maximum system call priority are kept permanently enabled, even 15 when the RTOS kernel is in a critical section, but cannot make any calls to 16 FreeRTOS API functions. If configASSERT() is defined i...
#define configENFORCE_SYSTEM_CALLS_FROM_KERNEL_ONLY 1 /* 可选函数 - 大多数链接器无论如何都会删除未使用的函数。*/ #define INCLUDE_vTaskPrioritySet 1 #define INCLUDE_uxTaskPriorityGet 1 #define INCLUDE_vTaskDelete 1 #define INCLUDE_vTaskSuspend 1 ...
= ALIGN(4); __syscalls_flash_start__ = .; *(freertos_system_calls) __syscalls_flash_end__ = .; . = ALIGN(4); *(.text) *(.text*) . = ALIGN(4); *(.mcal_text) . = ALIGN(4); *(.acmcu_code_rom) . = ALIGN(4); __acfls_code_rom_start = .; *(.acfls_code_ro...
used as a countingsemaphore.The task's notification value is incremented each timethe ISR calls v...
任务查询:函数如uxTaskGetSystemState、xTaskGetTickCount等获取任务和系统状态信息,如任务是否运行、任务数量、当前系统运行时间等。 任务切换:使用vTaskSwitchContext函数,在多个任务之间切换执行。通过调度器(scheduler)决定下一个应执行的任务。 资源共享和同步:通过信号量(semaphores)和队列(queues)实现任务间通信与同步...
系统时钟缺省配置为72MHz,如果需要更改,可以修改 system_stm32f10x.c 文件 */ /* 优先级分组设置为4,可配置0-15级抢占式优先级,0级子优先级,即不存在子优先级。*/ NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4); bsp_InitUart(); /* 初始化串口 */ bsp_InitLed(); /* 初始LED指示灯端口 */ bsp_...
系统时钟缺省配置为72MHz,如果需要更改,可以修改 system_stm32f10x.c 文件 */ /* 优先级分组设置为4,可配置0-15级抢占式优先级,0级子优先级,即不存在子优先级。*/ NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4); bsp_InitUart(); /* 初始化串口 */ bsp_InitLed(); /* 初始LED指示灯端口 */ bsp_...