midware_checksum_manager.c

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// Standard Library Includes
#include <stdbool.h>
 
// Framework Includes
#include <driver_crcscan.h>
#include <midware_checksum_manager.h>
 
// Device-specific Includes
#include <xc.h>
 
void MW_ClearCrcPeriodInterrupt(void)
{
    // Flag is cleared by writing the bitmask
    CRCSCAN_WriteIntFlags((uint8_t)CRCSCAN_PERIOD_bm);
}
 
errFlag_t MW_GetClearCrcDoneError(void)
{
    const uint8_t intFlagsRegVal = CRCSCAN_ReadIntFlags();
    const uint8_t doneMask       = (uint8_t)CRCSCAN_DONE_bm;
    const bool isDoneSet         = ((intFlagsRegVal & doneMask) == doneMask);
 
    errFlag_t flag = NO_ERROR;
    if (isDoneSet)
    {
        const uint8_t statusRegVal = CRCSCAN_ReadStatus();
        const uint8_t errorMask    = (uint8_t)CRCSCAN_ERROR_bm;
        const uint8_t busyMask     = (uint8_t)CRCSCAN_BUSY_bm;
        const bool isStatusError   = ((statusRegVal & errorMask) == errorMask);
        const bool isStatusBusy    = ((statusRegVal & busyMask) == busyMask);
 
        // If status is busy, the previous result was not checked before starting a new scan
        if (isStatusError || isStatusBusy)
        {
            flag = ERROR;
        }
 
        CRCSCAN_WriteIntFlags(doneMask); // Clear DONE flag
    }
 
    return flag;
}