于 2013年11月29日 22:52, Angus Clark 写道: > int (*write_reg)(struct spi_nor_info *info, > uint8_t cmd, uint8_t *reg, int len, > int wren, int wtr); I guess you add the 'wren' for the issuing write-enable before issuing the 'cmd'. but what's 'wtr' for? i do not know what's the meaning of the 'wtr'. thanks Huang Shijie