目錄、I2C數(shù)據(jù)傳輸過程、I2C數(shù)據(jù)傳輸方式I2cStart();主機(jī)發(fā)送起始條件起動(dòng)總線讀/寫I2C數(shù)據(jù)傳輸過程主機(jī)發(fā)送起始條件起動(dòng)總線發(fā)送一地址幀，包含從設(shè)備地址，并指明操作類型（讀或?qū)懀?。讀/寫I2C數(shù)據(jù)傳輸過程“0”:表示主機(jī)向從機(jī)寫數(shù)據(jù)，“1”:表示主機(jī)由從機(jī)讀數(shù)據(jù)。I2cStart();主機(jī)發(fā)送起始條件起動(dòng)總線ack();相應(yīng)從機(jī)應(yīng)答發(fā)送一地址幀，包含從設(shè)備地址，并指明操作類型（讀或?qū)懀?。讀/寫I2C數(shù)據(jù)傳輸過程I2cStart();主機(jī)發(fā)送起始條件起動(dòng)總線ack();相應(yīng)從機(jī)應(yīng)答發(fā)送一地址幀，包含從設(shè)備地址，并指明操作類型（讀或?qū)懀?。發(fā)送數(shù)據(jù)讀/寫I2C數(shù)據(jù)傳輸過程I2cStart();I2cStart();主機(jī)發(fā)送起始條件起動(dòng)總線ack();相應(yīng)從機(jī)應(yīng)答ack();接收設(shè)備每一幀應(yīng)答發(fā)送一地址幀，包含從設(shè)備地址，并指明操作類型（讀或?qū)懀?。發(fā)送數(shù)據(jù)讀/寫I2C數(shù)據(jù)傳輸過程主機(jī)發(fā)送起始條件起動(dòng)總線ack();相應(yīng)從機(jī)應(yīng)答ack();接收設(shè)備每一幀應(yīng)答發(fā)送一地址幀，包含從設(shè)備地址，并指明操作類型（讀或?qū)懀０l(fā)送數(shù)據(jù)I2cStop();數(shù)據(jù)傳送完畢后，主機(jī)發(fā)送停止總線信號(hào)。讀/寫I2C數(shù)據(jù)傳輸過程I2cStart();主設(shè)備往從設(shè)備中寫數(shù)據(jù)，數(shù)據(jù)傳送方向在整個(gè)傳送過程中不變。sP從設(shè)備地址0（W)ACK數(shù)據(jù)ACK數(shù)據(jù)ACK起始寫應(yīng)答應(yīng)答應(yīng)答停止數(shù)據(jù)傳輸（N字節(jié)+應(yīng)答）I2C數(shù)據(jù)傳輸方式1：主發(fā)從收主設(shè)備往從設(shè)備中寫數(shù)據(jù)，數(shù)據(jù)傳送方向在整個(gè)傳送過程中不變。I2C數(shù)據(jù)傳輸方式2：主收從發(fā)sP從設(shè)備地址0（W)ACK數(shù)據(jù)ACK數(shù)據(jù)ACK起始讀應(yīng)答應(yīng)答非應(yīng)答停止數(shù)據(jù)傳輸（N字節(jié)+應(yīng)答）主設(shè)備往從設(shè)備中寫數(shù)據(jù)，數(shù)據(jù)傳送方向在整個(gè)傳送過程中不變。I2C數(shù)據(jù)傳輸方式3：混合發(fā)送數(shù)據(jù)傳送方向在整個(gè)傳送過程中會(huì)有變化。主設(shè)備往從設(shè)備中寫數(shù)據(jù)，然后重啟起始條件，緊接著從從設(shè)備中讀取數(shù)據(jù)；或者是主設(shè)備從從設(shè)備中讀數(shù)據(jù)，然后重啟起始條件，緊接著主設(shè)備往從設(shè)備中寫數(shù)據(jù)。ACK起始讀或?qū)憫?yīng)答應(yīng)答應(yīng)答停止數(shù)據(jù)傳輸（N字節(jié)+應(yīng)答）sP從設(shè)備地址R/WACK數(shù)據(jù)