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DLP 3437 i2c 读写数据

在用devasys的USB I2C/IO工具板,用电脑C#语言写一个下载升级胡软件,在用DEVASYS 提供的API 进行读写时,读数据,读不出来,有没有一个用devasys的api进行读操作的例程参考下呢,写数据可以成功,但是读数据就读不到,I2C就被拉死了,在发送了0x37读地址后,i2c就拉死了,请问这是什么原因,谢谢