[求助]并口usb模块如何确定ch421A芯片的是否正常
下雨的天,你好,程序我收到,今天进行了试验,现在证明是ch421a的问题,正常的模块可以返回发过去的数据,但有一个问题是为什么正常的模块第一次发送过去的数据返回的前十几个字节不对,而循环写两遍就正常了,帮忙看看是什么问题。谢谢
这是连续写两遍的返回数据,第一遍写的是00、01、----16、00---00;接着写第二次,写的是30、31、32、---39、10、11、----16、00--00;
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OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=16 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00
OUT=30 OUT=31 OUT=32 OUT=33 OUT=34 OUT=35 OUT=36 OUT=37 OUT=38 OUT=39 OUT=10 OUT=11 OUT=12 OUT=13 OUT=14 OUT=15 OUT=16 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00

这人很懒,什么都没留下
你好,如果正常的模块返回的数据也有问题那暂时还不能说就是CH421的问题,程序上还要再调试一下,您可以以正常的模块测试,程序一开始上电的时候最少要600MS的延时,然后在第一次写完以后延时50MS再读.直到正常的模块返回的数据正常才能去测试认为有问题的!
此号封存
现在正常模块读写正常,前面提到的第一次写不正常问题以解决;有问题的模块ch421a的读写如下:
第一个模块:
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OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f
OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f OUT=7f
第二个模块:
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OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff
OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff OUT=ff
第三个模块:
start
OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb
OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb OUT=fb
正常的模块:
start
OUT=00 OUT=01 OUT=02 OUT=03 OUT=04 OUT=05 OUT=06 OUT=07 OUT=08 OUT=09 OUT=10 OUT=11 OUT=12 OUT=13 OUT=14 OUT=15 OUT=16 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00
OUT=30 OUT=31 OUT=32 OUT=33 OUT=34 OUT=35 OUT=36 OUT=37 OUT=38 OUT=39 OUT=10 OUT=11 OUT=12 OUT=13 OUT=14 OUT=15 OUT=16 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00 OUT=00
由以上的情况看,可以确定是ch421a的问题,但现在损坏的原因是什么哪?

这人很懒,什么都没留下
你好,昨天我们的技术工作人员已跟你电话联系,关于出现这个问题的具体原因等你把模块寄回我公司进行检测后才能知道。好吧?
^-^……
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