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/AliOS-Things-master/hardware/board/haaseduk1/drivers/sensor/
A Ddrv_baro_qst_qmp6988.c207 QMP6988_S64_t wk1, wk2, wk3; in qmp6988_get_pressure_02e() local
215 wk3 = wk2; // 55Q29 in qmp6988_get_pressure_02e()
218 wk3 += wk2; // 55,61->62Q29 in qmp6988_get_pressure_02e()
221 wk3 += wk2; // 62,61->63Q29 in qmp6988_get_pressure_02e()
222 wk1 += wk3 >> 14; // Q29 >> 14 -> Q15 in qmp6988_get_pressure_02e()
226 wk3 = wk2; // 61Q30 in qmp6988_get_pressure_02e()
230 wk3 += wk2; // 61,61->62Q30 in qmp6988_get_pressure_02e()
234 wk3 += wk2; // 62,62->63Q30 in qmp6988_get_pressure_02e()
235 wk1 += wk3 >> 15; // Q30 >> 15 = Q15 in qmp6988_get_pressure_02e()

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