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您好,我将boot写在bank0,app程序运行在bank1,boot完成跳转后,我在app程序执行flash写函数,写和擦除都是在bank0,但是写了大概20字节就写不了了,擦除的话会卡住,请问这是怎么回事?我不使用boot,app程序直接从bank0运行,操作bank1里的flash就可以,请问这有什么区别吗?