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上电串口打印的boot mode很怪,我测得MTDO为低电平,GPIO2为高电平。
当GPIO0为低电平时,打印:
ets Jan 8 2013,rst cause:2, boot mode:(5,3)
waiting for host
当GPIO0为高电平时,打印:
ets Jan 8 2013,rst cause:2, boot mode:(7,3)
waiting for host
正常情况下,应该分别为(1,6)和(3,6)。
第一个参数从1和3理解来看,是不是 bit[ MTDO, GPIO0, GPIO2]?如果是这样,那么5和7是怎么来的?
第二个参数代表着什么?
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