UCOSII 移植到51单片机（STC89C52RC）上运行3个任务控制LED灯闪烁正常，再增加一个任务就不行了

叶落浮华 · 发表于 2015-6-11 15:43:35

如题，UCOSII 移植到51单片机（STC89C52RC）上运行3个任务控制LED灯闪烁正常，我多添加一个任务其中修改了OS_CFG.H中的OS_MAX_TASKS的值由原来的OS_MAX_TASKS=5 改成OS_MAX_TASKS=6（或者7/8/9……)后4个任务都不能正常运行了，请问是什么原因！谢谢……
主函数代码如下：
把任务增加到4个就不能正常运行了

[mw_shl_code=c,true]#include"includes.h" sbit LED0 = P1 ^ 0; sbit LED2 = P1 ^ 2; sbit LED5 = P1 ^ 5; sbit LED7 = P1 ^ 7; OS_STK Task1Stk[MaxStkSize]; //创建任务堆栈 OS_STK Task2Stk[MaxStkSize]; OS_STK Task3Stk[MaxStkSize]; //OS_STK Task4Stk[MaxStkSize]; void Task1(void* ddata) reentrant { ddata = ddata; while (1) { LED0 = ~LED0; OSTimeDly(25); //在11.0592M晶振下，需要约切换一次任务，OSTimeDly(1);最小切换任务时间时钟节拍10ms } } void Task2(void* ddata) reentrant { ddata = ddata; while (1) { LED7 = ~LED7; OSTimeDly(50); // SBUF='a'; // while(!TI) // { // OSTimeDly(50); // } // TI=0; /**/ // } } void Task3(void*ddata ) reentrant { ddata = ddata; while (1) { LED2 = ~LED2; OSTimeDly(10); } } // void Task4(void*ddata ) reentrant // { // ddata = ddata; // while (1) // { // LED5 = ~LED5; // OSTimeDly(100); // } // } void main(void) { P1 = 0xff; OSInit(); InitTimer0(); init_UART(); OS_ENTER_CRITICAL(); //进入临界区(无法被中断打断) OSTaskCreate(Task1, (void *) 0, &Task1Stk[0], 1); OSTaskCreate(Task2, (void *) 0, &Task2Stk[0], 2); OSTaskCreate(Task3, (void *) 0, &Task3Stk[0], 3); //OSTaskCreate(Task4, (void *) 0, &Task4Stk[0], 4); OS_EXIT_CRITICAL(); //退出临界区(可以被中断打断) OSStart(); } [/mw_shl_code] [mw_shl_code=c,true]//OS_CFG.H中的部分配置 #define MaxStkSize 32 #define OS_MAX_EVENTS 1 /* Max. number of event control blocks in your application ... */ /* ... MUST be > 0 */ #define OS_MAX_FLAGS 1 /* Max. number of Event Flag Groups in your application ... */ /* ... MUST be > 0 */ #define OS_MAX_MEM_PART 1 /* Max. number of memory partitions ... */ /* ... MUST be > 0 */ #define OS_MAX_QS 1 /* Max. number of queue control blocks in your application ... */ /* ... MUST be > 0 */ #define OS_MAX_TASKS 5 /* Max. number of tasks in your application ... */ /* ... MUST be >= 2 */ #define OS_LOWEST_PRIO 7 /* Defines the lowest priority that can be assigned ... */ /* ... MUST NEVER be higher than 63! */ #define OS_TASK_IDLE_STK_SIZE 32 /* Idle task stack size (# of OS_STK wide entries) */ #define OS_TASK_STAT_EN 0 /* Enable (1) or Disable(0) the statistics task */ #define OS_TASK_STAT_STK_SIZE 32 /* Statistics task stack size (# of OS_STK wide entries) */ #define OS_ARG_CHK_EN 0 /* Enable (1) or Disable (0) argument checking */ #define OS_CPU_HOOKS_EN 0 /* uC/OS-II hooks are found in the processor port files */ [/mw_shl_code]