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Searched refs:ppm (Results 1 - 1 of 1) sorted by relevance

/vendor/hisilicon/hispark_pegasus/demo/environment_demo/
H A D	app_demo_mq2.c	`65 * ppm：为可燃气体的浓度 81 double ppm = 0; in Mq2GetPpm() local 88 (void)memset_s(&ppm, sizeof(ppm), 0x0, sizeof(ppm)); in Mq2GetPpm() 95 ppm = pow(X_CONSTANT_2 * vol / (VOILTAGE_5_V - vol), 1.0 / Y_CONSTANT_2); /* 计算ppm / in Mq2GetPpm() 96 if (ppm < PPM_THRESHOLD_300) { / 排除空气中其他气体的干扰 */ in Mq2GetPpm() 97 ppm = 0; in Mq2GetPpm() 100 if (ppm > PPM_THRESHOLD_300 in Mq2GetPpm() [all...]`

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