os.c

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/**
 * @file    os.c
 * @author  foxBMS Team
 * @date    2019-08-27 (date of creation)
 * @updated 2021-12-01 (date of last update)
 * @ingroup OS
 * @prefix  OS
 *
 * @brief   Implementation of the tasks and resources used by the system
 *
 */
 
/*========== Includes =======================================================*/
#include "os.h"
 
#include "ftask.h"
 
/*========== Macros and Definitions =========================================*/
 
/*========== Static Constant and Variable Definitions =======================*/
 
/** timer counter since the 1ms task has started */
static OS_TIMER_s os_timer = {0u, 0u, 0u, 0u, 0u, 0u, 0u};
 
/*========== Extern Constant and Variable Definitions =======================*/
/** boot state of the OS */
volatile OS_BOOT_STATE_e os_boot = OS_OFF;
/** timestamp of the scheduler start */
uint32_t os_schedulerStartTime = 0u;
 
/*========== Static Function Prototypes =====================================*/
 
/*========== Static Function Implementations ================================*/
 
/*========== Extern Function Implementations ================================*/
 
void OS_InitializeOperatingSystem(void) {
    /* operating system configuration (Queues, Tasks) */
    os_boot = OS_CREATE_QUEUES;
    FTSK_CreateQueues();
    os_boot = OS_CREATE_TASKS;
    FTSK_CreateTasks();
    os_boot = OS_INIT_PRE_OS;
}
 
/* AXIVION Disable Style Generic-MaxNesting: The program flow is simple
   although it exceeds the maximum nesting level and changing the
   implementation would not be beneficial for understanding the function. */
extern void OS_IncrementTimer(void) {
    if (++os_timer.timer_1ms > 9u) { /* 10ms */
        os_timer.timer_1ms = 0u;
        if (++os_timer.timer_10ms > 9u) { /* 100ms */
            os_timer.timer_10ms = 0u;
            if (++os_timer.timer_100ms > 9u) { /* 1s */
                os_timer.timer_100ms = 0u;
                if (++os_timer.timer_sec > 59u) { /* 1min */
                    os_timer.timer_sec = 0u;
                    if (++os_timer.timer_min > 59u) { /* 1h */
                        os_timer.timer_min = 0u;
                        if (++os_timer.timer_h > 23u) { /* 1d */
                            os_timer.timer_h = 0u;
                            ++os_timer.timer_d;
                        }
                    }
                }
            }
        }
    }
}
/* AXIVION Enable Style Generic-MaxNesting: */
 
/* AXIVION Next Line Style Generic-MissingParameterAssert: The function is designed and tested for full range */
extern bool OS_CheckTimeHasPassedWithTimestamp(
    uint32_t oldTimeStamp_ms,
    uint32_t currentTimeStamp_ms,
    uint32_t timeToPass_ms) {
    /* AXIVION Next Line Style MisraC2012Directive-4.1: correct handling of underflows is checked with unit tests */
    const uint32_t timeDifference_ms = currentTimeStamp_ms - oldTimeStamp_ms;
    bool timehasPassed               = false;
 
    if (timeToPass_ms == 0u) {
        timehasPassed = true;
    } else if (timeDifference_ms == 0u) {
        /* case timeToPass_ms is 0u has already been extracted
           therefore, only the cases where full UINT32_MAX time has passed
           remain. By definition we will assume in this case that no time has
           passed between these two timestamps and will therefore return false.
         */
    } else if (timeDifference_ms >= timeToPass_ms) {
        timehasPassed = true;
    } else {
        /* timehasPassed is already false, nothing to do */
    }
 
    return timehasPassed;
}
 
/* AXIVION Next Line Style Generic-MissingParameterAssert: The function is designed and tested for full range */
extern bool OS_CheckTimeHasPassed(uint32_t oldTimeStamp_ms, uint32_t timeToPass_ms) {
    return OS_CheckTimeHasPassedWithTimestamp(oldTimeStamp_ms, OS_GetTickCount(), timeToPass_ms);
}
 
extern STD_RETURN_TYPE_e OS_CheckTimeHasPassedSelfTest(void) {
    STD_RETURN_TYPE_e selfCheckReturnValue = STD_OK;
 
    /* AXIVION Next Line Style MisraC2012-2.2 MisraC2012-14.3: If the code works as expected, this self test function is expected to always return the same value */
    if (OS_CheckTimeHasPassedWithTimestamp(0u, 0u, 0u) != true) {
        /* AXIVION Next Line Style FaultDetection-UnusedAssignments: All cases collected, using each not necessary. */
        selfCheckReturnValue = STD_NOT_OK;
    }
 
    if (OS_CheckTimeHasPassedWithTimestamp(0u, 1u, 1u) != true) {
        /* AXIVION Next Line Style FaultDetection-UnusedAssignments: All cases collected, using each not necessary. */
        selfCheckReturnValue = STD_NOT_OK;
    }
 
    if (OS_CheckTimeHasPassedWithTimestamp(1u, 2u, 2u) != false) {
        /* AXIVION Next Line Style FaultDetection-UnusedAssignments: All cases collected, using each not necessary. */
        selfCheckReturnValue = STD_NOT_OK;
    }
 
    if (OS_CheckTimeHasPassedWithTimestamp(0u, 1u, 0u) != true) {
        /* AXIVION Next Line Style FaultDetection-UnusedAssignments: All cases collected, using each not necessary. */
        selfCheckReturnValue = STD_NOT_OK;
    }
 
    if (OS_CheckTimeHasPassedWithTimestamp(1u, 0u, 1u) != true) {
        selfCheckReturnValue = STD_NOT_OK;
    }
 
    return selfCheckReturnValue;
}
 
/*========== Externalized Static Function Implementations (Unit Test) =======*/
#ifdef UNITY_UNIT_TEST
extern OS_TIMER_s *TEST_OS_GetOsTimer() {
    return &os_timer;
}
#endif