ch341 exam.c里的IIC_InBlockByAck函數(shù)為什么能實(shí)現(xiàn)產(chǎn)生有效應(yīng)答的功能呢？里面好像沒有包含發(fā)送應(yīng)答的代碼啊 如果確實(shí)產(chǎn)生了應(yīng)答位，那么應(yīng)答位是1還是0呢？

BOOL WINAPI IIC_InBlockByAck( // 輸入數(shù)據(jù)塊,每輸入一個(gè)字節(jié)都產(chǎn)生有效應(yīng)答 ULONG iIndex, // 指定CH341設(shè)備序號(hào) ULONG iInLength, // 準(zhǔn)備讀取的數(shù)據(jù)字節(jié)數(shù),單次必須小于32字節(jié) PVOID oInBuffer ) // 指向一個(gè)緩沖區(qū),返回后是讀入的數(shù)據(jù) { UCHAR mBuffer[ mCH341_PACKET_LENGTH ]; ULONG mLength, mInLen; if ( iInLength == 0 || iInLength > mCH341A_CMD_I2C_STM_MAX ) return( FALSE ); mBuffer[ 0 ] = mCH341A_CMD_I2C_STREAM; // 命令碼 mBuffer[ 1 ] = (UCHAR)( mCH341A_CMD_I2C_STM_IN | iInLength ); // 輸入數(shù)據(jù),位5-位0為長度 mBuffer[ 2 ] = mCH341A_CMD_I2C_STM_END; // 當(dāng)前包提前結(jié)束 mLength = 3; 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 == iInLength ) { memcpy( oInBuffer, &mBuffer[0], iInLength ); // 數(shù)據(jù) return( TRUE ); } } return( FALSE ); }