xTaskResumeFromISR函数在串口中断中的使用

jxdqwer

1. curTime=xTaskGetTickCount();
2.         interval=curTime-lastTime;
3.         lastTime=curTime;
4.         if(interval>=5)  
5.         {
6.             flaggps=0;
7.             xYieldRequired = xTaskResumeFromISR(xgps);
8.             
9.         }
10.         
11.         if (USART_GetITStatus(COM_USART[COM], USART_IT_RXNE) != RESET)
12.         {
13.                 gps_raw_data[flaggps] = USART_ReceiveData(COM_USART[COM]);  //???? ???????
14.               flaggps++;
15.         }
17.         if( xYieldRequired == pdTRUE )
18.      {
19.          portYIELD_FROM_ISR(xYieldRequired);
20.      }

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这是串口接收中断中的一部分，运行之后就会卡在这个位置。

1. #if( configASSERT_DEFINED == 1 )
3.     void vPortValidateInterruptPriority( void )
4.     {
5.     uint32_t ulCurrentInterrupt;
6.     uint8_t ucCurrentPriority;
8.         /* Obtain the number of the currently executing interrupt. */
9.         ulCurrentInterrupt = vPortGetIPSR();
11.         /* Is the interrupt number a user defined interrupt? */
12.         if( ulCurrentInterrupt >= portFIRST_USER_INTERRUPT_NUMBER )
13.         {
14.             /* Look up the interrupt's priority. */
15.             ucCurrentPriority = pcInterruptPriorityRegisters[ ulCurrentInterrupt ];
17.             /* The following assertion will fail if a service routine (ISR) for
18.             an interrupt that has been assigned a priority above
19.             configMAX_SYSCALL_INTERRUPT_PRIORITY calls an ISR safe FreeRTOS API
20.             function.  ISR safe FreeRTOS API functions must *only* be called
21.             from interrupts that have been assigned a priority at or below
22.             configMAX_SYSCALL_INTERRUPT_PRIORITY.
24.             Numerically low interrupt priority numbers represent logically high
25.             interrupt priorities, therefore the priority of the interrupt must
26.             be set to a value equal to or numerically *higher* than
27.             configMAX_SYSCALL_INTERRUPT_PRIORITY.
29.             Interrupts that    use the FreeRTOS API must not be left at their
30.             default priority of    zero as that is the highest possible priority,
31.             which is guaranteed to be above configMAX_SYSCALL_INTERRUPT_PRIORITY,
32.             and    therefore also guaranteed to be invalid.
34.             FreeRTOS maintains separate thread and ISR API functions to ensure
35.             interrupt entry is as fast and simple as possible.
37.             The following links provide detailed information:
38.             http://www.freertos.org/RTOS-Cortex-M3-M4.html
39.             http://www.freertos.org/FAQHelp.html */
40.             configASSERT( ucCurrentPriority >= ucMaxSysCallPriority );   //这里
41.         }

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eric2013

关于这个问题，着重看下我们FreeRTOS教程的第12章，详细 讲解了：
http://www.armbbs.cn/forum.php?mod=viewthread&tid=17658

jxdqwer

eric2013:
关于这个问题，着重看下我们FreeRTOS教程的第12章，详细 讲解了：
http://www.armbbs.cn/forum.php?mod=viewthread&tid=17658

加上了NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);
Freertosconfig.h设置

1. #ifdef __NVIC_PRIO_BITS
2.     /* __BVIC_PRIO_BITS will be specified when CMSIS is being used. */
3.     #define configPRIO_BITS               __NVIC_PRIO_BITS
4. #else
5.     #define configPRIO_BITS               4        /* 15 priority levels */
6. #endif
8. /* The lowest interrupt priority that can be used in a call to a "set priority"
9. function. */
10. #define configLIBRARY_LOWEST_INTERRUPT_PRIORITY            0x0f
12. /* The highest interrupt priority that can be used by any interrupt service
13. routine that makes calls to interrupt safe FreeRTOS API functions.  DO NOT CALL
14. INTERRUPT SAFE FREERTOS API FUNCTIONS FROM ANY INTERRUPT THAT HAS A HIGHER
15. PRIORITY THAN THIS! (higher priorities are lower numeric values. */
16. #define configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY    0x01
18. /* Interrupt priorities used by the kernel port layer itself.  These are generic
19. to all Cortex-M ports, and do not rely on any particular library functions. */
20. #define configKERNEL_INTERRUPT_PRIORITY         ( configLIBRARY_LOWEST_INTERRUPT_PRIORITY << (8 - configPRIO_BITS) )
21. /* !!!! configMAX_SYSCALL_INTERRUPT_PRIORITY must not be set to zero !!!!
22. See http://www.FreeRTOS.org/RTOS-Cortex-M3-M4.html. */
23. #define configMAX_SYSCALL_INTERRUPT_PRIORITY     ( configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY << (8 - configPRIO_BITS) )
24.    
25. /* Normal assert() semantics without relying on the provision of an assert.h
26. header file. */
27. #define configASSERT( x ) if( ( x ) == 0 ) { taskDISABLE_INTERRUPTS(); for( ;; ); }

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现在停在

1. static void prvTaskExitError( void )
2. {
3.     /* A function that implements a task must not exit or attempt to return to
4.     its caller as there is nothing to return to.  If a task wants to exit it
5.     should instead call vTaskDelete( NULL ).
7.     Artificially force an assert() to be triggered if configASSERT() is
8.     defined, then stop here so application writers can catch the error. */
9.     这一句configASSERT( uxCriticalNesting == ~0UL );
10.     portDISABLE_INTERRUPTS();
11.     for( ;; );
12. }

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eric2013

中断里面调用FreeRTOS的API函数，一定要是FromISR结尾的函数，也就是
xTaskGetTickCountFromISR，不能是xTaskGetTickCount

jxdqwer

eric2013:
中断里面调用FreeRTOS的API函数，一定要是FromISR结尾的函数，也就是
xTaskGetTickCountFromISR，不能是xTaskGetTickCount

不考虑xTaskResumeFromISR(xgps);这句代码，使用xTaskGetTickCountFromISR会死机，使用xTaskGetTickCount不会死机，还会得到正确的Tick。

1. void UART4_IRQHandler(void)
2. {
3. //    _IRQHandler(COM4);
4.       _gps(COM4);
5. //      ano_dtt(COM4);
6. }

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1. void _gps(uint8_t COM)
2. {
3.       BaseType_t xYieldRequired;
4.    
5.       static uint32_t lastTime =0;
6.         uint32_t curTime;
7.         uint32_t interval = 0;
8.         
9.         curTime=xTaskGetTickCountFromISR();
10.         interval=curTime-lastTime;
11.         lastTime=curTime;
12.         if(interval>=5)  
13.         {
14.             flaggps=0;
15.             xYieldRequired = xTaskResumeFromISR(xgps);
16.             if( xYieldRequired == pdTRUE )
17.      {
18.          portYIELD_FROM_ISR(xYieldRequired);
19.      }
20.         }
21.         
22.         if (USART_GetITStatus(COM_USART[COM], USART_IT_RXNE) != RESET)
23.         {
24.                 gps_raw_data[flaggps] = USART_ReceiveData(COM_USART[COM]);  //???? ???????
25.               flaggps++;
26.         }
28.         
29. //        
30. }

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jxdqwer

。。。。

jxdqwer

心酸///

jxdqwer

不管怎么样，现在一切正常了，但是使用一个非中断api一个中断api，居然可以正常运行。
curTime=xTaskGetTickCount();
xYieldRequired = xTaskResumeFromISR(xgps);