BQ76940: BQ7694003 OV_TRIP写入不成功

MCU的代码如下：

static int __config_cell_ovp(struct config_s* conf) {
PROTECT3_Type protect3;
int ov_trip = 0;
protect3.byte = __read_byte(PROTECT3);
ov_trip = ((((long)(conf->cell_ov_limit * 1000) - conf->adc_offset) * 1000 / conf->adc_gain) >> 4) & 0x00FF;
//printf("set OV_TRIP: %02X\r\n", ov_trip);
__write_byte(OV_TRIP, ov_trip);
//printf("get OV_TRIP: %02X\r\n", __read_byte(OV_TRIP));
protect3.OV_DELAY = 0;
for (int i = COUNTOF(OV_delay_setting) - 1; i > 0; i--) {
if (conf->cell_ov_delay_ms >= OV_delay_setting[i]) {
protect3.OV_DELAY = i;
break;
}
}
__write_byte(PROTECT3, protect3.byte);
// returns the actual current threshold value
return ((long)1 << 13 | ov_trip << 4) * conf->adc_gain / 1000 + conf->adc_offset;
}