SC2731_CURRENT_PRECHG
else if (cur < SC2731_CURRENT_PRECHG)
cur = SC2731_CURRENT_PRECHG;
val = (cur - SC2731_CURRENT_PRECHG) / SC2731_CURRENT_STEP;
*cur = val * SC2731_CURRENT_STEP + SC2731_CURRENT_PRECHG;