28029 Parallax Inc, 28029 Datasheet - Page 177

• Manufacturer Part Number: 28029
• Description: KIT PARTS SMART SENSORS W/TEXT
• Manufacturer: Parallax Inc

Specifications of 28029

• Accessory Type: Parts Kit
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: BASIC Stamp® or Javelin Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: 28029PAR

Compass_Get_Axes:
LOOP
angleTilt = angleTilt */ 361
IF sign = Negative THEN
ENDIF
RETURN
' -----[ Subroutine - Compass_Get_Axes ]------------------------------------
HIGH En: LOW En
SHIFTOUT DinDout,clk,MSBFIRST,[Reset\4]
HIGH En: LOW En
SHIFTOUT DinDout,clk,MSBFIRST,[Measure\4]
status = 0
DO
LOOP UNTIL status = Ready
' Get x & y axis values
SHIFTIN
HIGH En
' Store 11-bits as signed words for both axes
IF (yCompass.BIT10 = 1) THEN yCompass = yCompass | NegMask
IF (xCompass.BIT10 = 1) THEN xCompass = xCompass | NegMask
RETURN
IF (COS angleTilt <= side) THEN EXIT
angleTilt = angleTilt + 1
angleTilt = 180 - angleTilt
HIGH En: LOW En
SHIFTOUT DinDout,clk,MSBFIRST,[Report\4]
SHIFTIN
DinDout,clk,MSBPOST,[xCompass\11,yCompass\11]
DinDout,clk,MSBPOST,[Status\4]
Chapter 4: Hitachi HM55B Compass Module · Page 165
' Done when COS angle <= side
' Keep increasing angle
' Convert brads to degrees
' Adjust if sign is negative.
' Compass module subroutine
' Send reset command to HM55B
' HM55B start measurement command
' Clear previous status flags
' Status flag checking loop
' Measurement status command
' Get Status
' Exit loop when status is ready
' Disable module