MPXM2102A datasheet(8/10 Pages) FREESCALE

部件名	MPXM2102A

功能描述	Altimeter and Barometer System

PDF	10 Pages

Scroll/Zoom	100%

制造商	FREESCALE [Freescale Semiconductor, Inc]

网页	http://www.freescale.com

标志

8 / 10 page

AN1979

Sensors

Freescale Semiconductor

Figure 7. Altimeter/Barometer Software Flow Diagram

REFERENCES

Williams, Jack. (2001). Understanding Air Pressure. The

Weather Book, 5, 117–123. Retrieved April 4, 2003, from

http://www.usatoday.com/weather/wfront.htm

Start

A/D converter is set up and enabled

and variables initialized

PB1 and PB2

pressed

Start in Calibration

Mode?

PB1 and PB2 not

pressed

Display Welcome

Message

Display Altitude or

Set Elevation?

Read 256 A/D values

Average 256

Convert digital reading

to history graph

Convert A/D Values

to Pressure (kPa)

Calculate Altitude

Display Barometric

Pressure, Altitude and

History

Display Calibration

Message

Apply 64 kPa Pressure

Average 256 Readings

Apply 105 kPa Pressure

Average 256 Readings

“Select Elevation”

Menu Displayed

Cycle through 0 to

12000ft selections

PB1 pressed

PB2 pressed

in Feet

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