現(xiàn)在設(shè)備地址存在兩個(gè)，一個(gè)是0x1A,一個(gè)是0x1B，有什么方案可以去做應(yīng)答位的檢測嗎？

您好，可參考如下blog：https://blog.csdn.net/WCH_TechGroup/article/details/130932558?

使用如下接口函數(shù)可實(shí)現(xiàn)：

BOOL WINAPI IIC_OutByteCheckAck( // 輸出一字節(jié)數(shù)據(jù)并檢查應(yīng)答是否有效

ULONG iIndex, // 指定CH341設(shè)備序號(hào)

UCHAR iOutByte ) // 準(zhǔn)備寫出的數(shù)據(jù)

{

UCHAR mBuffer[ mCH341_PACKET_LENGTH ];

ULONG mLength, mInLen;

mBuffer[ 0 ] = mCH341A_CMD_I2C_STREAM; // 命令碼

mBuffer[ 1 ] = mCH341A_CMD_I2C_STM_OUT; // 輸出數(shù)據(jù),位5-位0為長度,0長度則只發(fā)送一個(gè)字節(jié)并返回應(yīng)答

mBuffer[ 2 ] = iOutByte; // 數(shù)據(jù)

mBuffer[ 3 ] = mCH341A_CMD_I2C_STM_END; // 當(dāng)前包提前結(jié)束

mLength = 4;

mInLen = 0;

if ( CH341WriteRead( iIndex, mLength, mBuffer, mCH341A_CMD_I2C_STM_MAX, 1, &mInLen, mBuffer ) ) { // 執(zhí)行數(shù)據(jù)流命令,先輸出再輸入

if ( mInLen && ( mBuffer[ mInLen - 1 ] & 0x80 ) == 0 ) return( TRUE ); // 返回的數(shù)據(jù)的位7代表ACK應(yīng)答位,ACK=0有效

}

return( FALSE );