69 lines
1.3 KiB
C
69 lines
1.3 KiB
C
#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;
|
||
}
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|