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Gabriel Wang 2021-01-11 20:09:09 +00:00
parent 85f8d573b1
commit 233e006869
1 changed files with 6 additions and 6 deletions
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perf_counter.c
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@ -243,19 +243,19 @@ static __attribute__((always_inline)) int32_t check_systick(void)
/*! \note Since we cannot stop counting temporarily, there are several /*! \note Since we cannot stop counting temporarily, there are several
*! conditions which we should take into consideration: *! conditions which we should take into consideration:
*! Condition one: when assign nTemp with the register value (LOAD-VAL), *! Condition 1: when assign nTemp with the register value (LOAD-VAL),
*! the underflow didn't happen and when we check the PENDSTSET bit, *! the underflow didn't happen but when we check the PENDSTSET bit,
*! the underflow happens, for this condition, we should not *! the underflow happens, for this condition, we should not
*! do any compensation. When this happens, the (LOAD-nTemp) is *! do any compensation. When this happens, the (LOAD-nTemp) is
*! smaller than PERF_CNT_COMPENSATION_THRESHOLD (a big value) as *! smaller than PERF_CNT_COMPENSATION_THRESHOLD (a small value) as
*! long as LOAD is bigger than (or equals to) the *! long as LOAD is bigger than (or equals to) the
*! PERF_CNT_COMPENSATION_THRESHOLD; *! PERF_CNT_COMPENSATION_THRESHOLD;
*! Condition two: when assign nTemp with the register value (LOAD-VAL), *! Condition 2: when assign nTemp with the register value (LOAD-VAL),
*! the VAL is zero and underflow happened and the PENDSTSET bit *! the VAL is zero and underflow happened and the PENDSTSET bit
*! is set, for this condition, we should not do any compensation. *! is set, for this condition, we should not do any compensation.
*! When this happens, the (LOAD-nTemp) is equals to zero. *! When this happens, the (LOAD-nTemp) is equals to zero.
*! Condition Three: when initialising nTemp with the register value *! Condition 3: when assign nTemp with the register value (LOAD-VAL),
*! VAL, the underflow has already happened, hence the PENDSTSET *! the underflow has already happened, hence the PENDSTSET
*! is set, for this condition, we should compensate the return *! is set, for this condition, we should compensate the return
*! value. When this happens, the (LOAD-nTemp) is bigger than (or *! value. When this happens, the (LOAD-nTemp) is bigger than (or
*! equals to) PERF_CNT_COMPENSATION_THRESHOLD. *! equals to) PERF_CNT_COMPENSATION_THRESHOLD.