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LibrePilot/flight/PiOS/inc/FreeRTOSConfig.h

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#ifndef FREERTOS_CONFIG_H
#define FREERTOS_CONFIG_H
/*-----------------------------------------------------------
* Application specific definitions.
*
* These definitions should be adjusted for your particular hardware and
* application requirements.
*
* THESE PARAMETERS ARE DESCRIBED WITHIN THE 'CONFIGURATION' SECTION OF THE
* FreeRTOS API DOCUMENTATION AVAILABLE ON THE FreeRTOS.org WEB SITE.
*
* See http://www.freertos.org/a00110.html.
*----------------------------------------------------------*/
/**
* @addtogroup PIOS PIOS
* @{
* @addtogroup FreeRTOS FreeRTOS
* @{
*/
/* Notes: We use 5 task priorities */
#define configUSE_PREEMPTION 1
#define configUSE_IDLE_HOOK 1
#define configUSE_TICK_HOOK 0
#define configCPU_CLOCK_HZ ( ( unsigned long ) 72000000 )
#define configTICK_RATE_HZ ( ( portTickType ) 1000 )
#define configMAX_PRIORITIES ( ( unsigned portBASE_TYPE ) 5 )
#define configMINIMAL_STACK_SIZE ( ( unsigned short ) 256 )
#define configTOTAL_HEAP_SIZE ( ( size_t ) ( 45 * 1024 ) )
#define configMAX_TASK_NAME_LEN ( 16 )
#define configUSE_TRACE_FACILITY 0
#define configUSE_16_BIT_TICKS 0
#define configIDLE_SHOULD_YIELD 0
#define configUSE_MUTEXES 1
#define configUSE_RECURSIVE_MUTEXES 1
#define configUSE_COUNTING_SEMAPHORES 0
#define configUSE_ALTERNATIVE_API 0
#define configCHECK_FOR_STACK_OVERFLOW 2
#define configQUEUE_REGISTRY_SIZE 10
/* Co-routine definitions. */
#define configUSE_CO_ROUTINES 0
#define configMAX_CO_ROUTINE_PRIORITIES ( 2 )
/* Set the following definitions to 1 to include the API function, or zero
to exclude the API function. */
#define INCLUDE_vTaskPrioritySet 1
#define INCLUDE_uxTaskPriorityGet 1
#define INCLUDE_vTaskDelete 1
#define INCLUDE_vTaskCleanUpResources 0
#define INCLUDE_vTaskSuspend 1
#define INCLUDE_vTaskDelayUntil 1
#define INCLUDE_vTaskDelay 1
#define INCLUDE_xTaskGetSchedulerState 1
#define INCLUDE_xTaskGetCurrentTaskHandle 1
#define INCLUDE_uxTaskGetStackHighWaterMark 0
/* This is the raw value as per the Cortex-M3 NVIC. Values can be 255
freertos: fix RTOS API calls from interrupt level FreeRTOS has a strict requirement that even interrupt-safe API calls (ie. those ending in "FromISR") can only be called from ISRs that are at lesser or equal priorities to configMAX_SYSCALL_INTERRUPT_PRIORITY. See the "configKERNEL_INTERRUPT_PRIORITY and configMAX_SYSCALL_INTERRUPT_PRIORITY" section at: http://www.freertos.org/a00110.html The interrupt numbers used on the Cortex-M3 CPU has a somewhat backward representation of the interrupt numbers so 255 = lowest priority and 0 = highest priority. The calculation is further complicated by the STM32 implementation only using the upper 4 bits of the priority value. Only 0x00, 0x10, 0x20, ..., 0xE0, 0xF0 represent useful interrupt priorities. FreeRTOS requires that MAX_SYSCALL and KERNEL interrupt priorities are expressed as raw unshifted 8-bit values to be programmed directly into the BASEPRI register. The priority values passed to the NVIC initialization, however, are expected to be 4-bit values and are shifted up by 4 within NVIC_Init() for you. The end result is that we need this arrangement: [highest priority] NVIC_0 (Non-maskable-interrupt) NVIC_1 NVIC_2 [Must NOT call FreeRTOS APIs above here] configMAX_SYSCALL_INTERRUPT_PRIORITY (now at 48 = 0x30 = NVIC_3) PIOS_IRQ_PRIO_HIGHEST (cur. NVIC_4) PIOS_IRQ_PRIO_HIGH (cur. NVIC_5) PIOS_IRQ_PRIO_MID (cur. NVIC_8) PIOS_IRQ_PRIO_LOW (cur. NVIC_12) configKERNEL_INTERRUPT_PRIORITY (240 = 0xF0 = NVIC_15) [lowest priority] The previous config had configMAX_SYSCALL_INTERRUPT_PRIORITY set at 191 (0xBF) which is effectively NVIC_11. This was allowing all of the MID, HIGH and HIGHEST interrupt handlers to preempt the OS in its critical sections. Since some of these ISRs were calling FreeRTOS APIs, this would result in corrupting internal data structures within the OS. It should be ok to move the configKERNEL_INTERRUPT_PRIORITY to a higher priority as long as it is less than configMAX_SYSCALL_INTERRUPT_PRIORITY. git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@637 ebee16cc-31ac-478f-84a7-5cbb03baadba
2010-05-18 06:50:38 +02:00
(lowest) to 1 (highest maskable) to 0 (highest non-maskable). */
#define configKERNEL_INTERRUPT_PRIORITY 15 << 4 /* equivalent to NVIC priority 15 */
#define configMAX_SYSCALL_INTERRUPT_PRIORITY 3 << 4 /* equivalent to NVIC priority 3 */
/* This is the value being used as per the ST library which permits 16
priority values, 0 to 15. This must correspond to the
configKERNEL_INTERRUPT_PRIORITY setting. Here 15 corresponds to the lowest
NVIC value of 255. */
#define configLIBRARY_KERNEL_INTERRUPT_PRIORITY 15
/**
* @}
*/
#endif /* FREERTOS_CONFIG_H */