1 /* 2 * Copyright (c) 2022 HiSilicon (Shanghai) Technologies CO., LIMITED. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef APP_DEMO_MQ2_H 17 #define APP_DEMO_MQ2_H 18 19 typedef struct { 20 double g_combustibleGasValue; 21 unsigned char g_ahu20GasBuff[6]; 22 }Mq2SensorDef; 23 24 void SetCombuSensorValue(void); 25 float GetCombuSensorValue(void); 26 void Mq2PpmCalibration(float rS); 27 float Mq2GetPpm(float voltage); 28 void Mq2GetData(void); 29 30 #endif