MV_SPI_READ
reg = MV_SPI_READ(sc, MV_SPI_CONTROL);
reg = MV_SPI_READ(sc, MV_SPI_CONF);
p[read] = MV_SPI_READ(sc, MV_SPI_DATAIN) & 0xff;
reg = MV_SPI_READ(sc, MV_SPI_CONF);
reg = MV_SPI_READ(sc, MV_SPI_CONTROL);
reg = MV_SPI_READ(sc, MV_SPI_CONTROL);
reg = MV_SPI_READ(sc, MV_SPI_CONTROL);