HC_REG_TRAILING_EDGE_0
REG_WR(bp, HC_REG_TRAILING_EDGE_0 + port*8, val);
REG_WR(bp, HC_REG_TRAILING_EDGE_0 + port*8, val);
REG_WR(bp, HC_REG_TRAILING_EDGE_0 + port*8, 0);
REG_WR(bp, HC_REG_TRAILING_EDGE_0 + port*8, 0);
REG_WR(bp, HC_REG_TRAILING_EDGE_0 + port*8, 0);