#include "../main/SystemInclude.h"

// 读取传感器数据
u16 AirflowSensor_Read(void)
{
	u8 raw_data[2] = {0};

	SI2C_Start();

	// 发送读取命令（地址 + 读模式）
	SI2C_Write((HAF_ADR << 1) | 0x01);

	// 连续读取2字节数据
	// 数据格式：[流量高8位, 流量低8位]
	raw_data[0] = SI2C_Read();
	SI2C_Ack();  // 发送ACK继续读取
	raw_data[1] = SI2C_Read();
	SI2C_NoAck();// 最后一个字节发送NACK
	SI2C_Stop();
    
	// 合并流量数据（16位）
	u16 flow_raw =((raw_data[0] << 8) | raw_data[1]) ;
 
	return flow_raw ;
}

// 批量读取多次取平均值
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;
}
// 转换成SCCM
#define  MaximumFlow 			  750  //SCCM
float Get_AirflowSensor_SCCM(void)
{
	u16 total_flow = 0;
	  float	slpm_flow;
		total_flow = AirflowSensor_ReadAverage(10);//读取连续转换10次的平均值
	
	  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; 
}