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/vendor/hisilicon/hispark_pegasus/demo/environment_demo/
H A Dapp_demo_mq2.c80 float vol = voltage; in Mq2GetPpm() local
85 float VolDif = (VOILTAGE_5_V - vol); in Mq2GetPpm()
86 float SeekModule = VolDif / vol; in Mq2GetPpm()
95 ppm = pow(X_CONSTANT_2 * vol / (VOILTAGE_5_V - vol), 1.0 / Y_CONSTANT_2); /* 计算ppm */ in Mq2GetPpm()

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