我把CH376T和MCU采用串口方式通讯，初始化为设备方式，计算机上显示为未知USB设备，程序如下，如何解决？（驱动为CH372驱动） UINT8 mInitCH376Device( void ) /* 初始化CH376 */ { UINT8 res; CH376_PORT_INIT( ); /* 接口硬件初始化 */ xWriteCH376Cmd( CMD11_CHECK_EXIST ); /* 测试单片机与CH376之间的通讯接口 */ xWriteCH376Data( 0x65 ); res = xReadCH376Data( ); // xEndCH376Cmd( ); // 异步串口方式不需要 if ( res != 0x9A ) return( ERR_USB_UNKNOWN ); /* 通讯接口不正常,可能原因有:接口连接异常,其它设备影响(片选不唯一),串口波特率,一直在复位,晶振不工作 */ #ifdef UART_WORK_BAUDRATE xWriteCH376Cmd( CMD21_SET_BAUDRATE ); /* 设置串口通讯波特率 */ #if UART_WORK_BAUDRATE >= 6000000/256 xWriteCH376Data( 0x03 ); xWriteCH376Data( 256 - 6000000/UART_WORK_BAUDRATE ); #else xWriteCH376Data( 0x02 ); xWriteCH376Data( 256 - 750000/UART_WORK_BAUDRATE ); #endif SET_WORK_BAUDRATE( ); /* 将单片机切换到正式通讯波特率 */ res = xReadCH376Data( ); // xEndCH376Cmd( ); // 异步串口方式不需要 if ( res != CMD_RET_SUCCESS ) return( ERR_USB_UNKNOWN ); /* 通讯波特率切换失败,建议通过硬件复位CH376后重试 */ #endif xWriteCH376Cmd( CMD11_SET_USB_MODE ); /* 设备USB工作模式 */ xWriteCH376Data( 0x02 ); // mDelayuS( 20 ); // 异步串口方式不需要 res = xReadCH376Data( ); // xEndCH376Cmd( ); // 异步串口方式不需要 if ( res == CMD_RET_SUCCESS ) return( USB_INT_SUCCESS ); else return( ERR_USB_UNKNOWN ); /* 设置模式错误 */ }

测试命令和设置模式能够成功么？

后来PC机又能找到了，不知道怎么回事。。。

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