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user/Device/HAFBLF0750C4AX5.c

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+#include "../main/SystemInclude.h"
+
+// <20><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
+u16 AirflowSensor_Read(void)
+{
+	u8 raw_data[2] = {0};
+
+	SI2C_Start();
+
+	// <20><><EFBFBD>Ͷ<EFBFBD>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD><EEA3A8>ַ + <20><>ģʽ<C4A3><CABD>
+	SI2C_Write((HAF_ADR << 1) | 0x01);
+
+	// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ2<C8A1>ֽ<EFBFBD><D6BD><EFBFBD><EFBFBD><EFBFBD>
+	// <20><><EFBFBD>ݸ<EFBFBD>ʽ<EFBFBD><CABD>[<5B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>8λ, <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>8λ]
+	raw_data[0] = SI2C_Read();
+	SI2C_Ack();  // <20><><EFBFBD><EFBFBD>ACK<43><4B><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ
+	raw_data[1] = SI2C_Read();
+	SI2C_NoAck();// <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD>ֽڷ<D6BD><DAB7><EFBFBD>NACK
+	SI2C_Stop();
+    
+	// <20>ϲ<EFBFBD><CFB2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݣ<EFBFBD>16λ<36><CEBB>
+	u16 flow_raw =((raw_data[0] << 8) | raw_data[1]) ;
+ 
+	return flow_raw ;
+}
+
+// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD>ȡƽ<C8A1><C6BD>ֵ
+u16 AirflowSensor_ReadAverage(u8 count)
+{
+    u8 valid_count = 0;
+    u32 total_flow = 0;
+    if (count <= 0) return 0;
+    for (uint8_t i = 0; i < count; i++) 
+		{
+			total_flow += AirflowSensor_Read();
+			valid_count++;
+			delay_ms(10); 
+		}
+    if (valid_count > 0) {
+			total_flow= total_flow / valid_count;
+    }
+    return total_flow;
+}
+// ת<><D7AA><EFBFBD><EFBFBD>SCCM
+#define  MaximumFlow 			  750  //SCCM
+float Get_AirflowSensor_SCCM(void)
+{
+	u16 total_flow = 0;
+	  float	slpm_flow;
+		total_flow = AirflowSensor_ReadAverage(10);//<2F><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD>ת<EFBFBD><D7AA>10<31>ε<EFBFBD>ƽ<EFBFBD><C6BD>ֵ
+	
+	  if(total_flow > 8192)slpm_flow  = (total_flow-8192)*MaximumFlow;
+		else 								 slpm_flow  = (total_flow+8192)*MaximumFlow;
+	
+		slpm_flow = slpm_flow/ 8192;
+	return slpm_flow; 
+}
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