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/AliOS-Things-master/components/sensor/drv/drv_ps_st_vl53l0x/vl53l0x/
A Dvl53l0x_api_core.c1595 FixPoint1616_t sqr2; in VL53L0X_calc_sigma_estimate() local
1817 sqr2 = sigmaEstimateP2; in VL53L0X_calc_sigma_estimate()
1820 sqr2 = (sqr2 + 0x8000) >> 16; in VL53L0X_calc_sigma_estimate()
1823 sqr2 *= sqr2; in VL53L0X_calc_sigma_estimate()
1826 sqrSum = sqr1 + sqr2; in VL53L0X_calc_sigma_estimate()
1855 sqr2 = cSigmaEstRef * cSigmaEstRef; in VL53L0X_calc_sigma_estimate()
1858 sqrtResult = VL53L0X_isqrt((sqr1 + sqr2)); in VL53L0X_calc_sigma_estimate()

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