IS25LP512M芯片：因未使能Quad IO，造成Quad IO读失败

[jayleesat]

IS25LP512M芯片：因未使能Quad IO，造成Quad IO读失败

[jayleesat]

IS25LP512M芯片的IO2， IO3为复用引脚，需要在Status bit中使能Quad IO。
因此我在hardware_init中，添加代码使能Quad IO后，操作成功。
/* The flash all blocks is protected,so need change the flash status to unprotected before write and erase operate. */
......
/IS25LP512M/
if ((0x9D == flash->chip.mf_id) && (0x60 == flash->chip.type_id) && (0x1A == flash->chip.capacity_id)) {
result = sfud_write_status(flash, true, 0x40); /Enable Quad port/
}