Changeset 3423

Timestamp:

Nov 14, 2012 8:11:21 AM (6 months ago)

Author:

wmb

Message:

OLPC ARM - accelerometer selftest
a) reduced the min-y value to prevent test fallout
b) Eliminated the not1g? test because it was failing sometimes.
The selftest is now almost worthless because the vendor-recommended
acceptance range encompasses pretty much the entire number range.
I guess what is being tested is whether the value changes at all
(in the right direction) when you invoke the built-in-test feature.

File:

• cpu/arm/olpc/accelerometer.fth (modified) (4 diffs)

cpu/arm/olpc/accelerometer.fth

@@ -77 +77 @@
 
 d#   80 value min-x
-d#   80 value min-y
+d#   20 value min-y
 d#   80 value min-z
 d# 1700 value max-x
@@ -133 +133 @@
    average-acceleration@     ( x y z )
 
+[ifdef] notyet
    \ Check that the magnitude of the acceleration vector is about 1 G
    3dup not1g?  if           ( x y z )
@@ -139 +140 @@
       true exit              ( -- error? )
    then                      ( x y z )
+[then]
 
    \ Use the device's selftest function to force a change in one direction
@@ -178 +180 @@
       \ Support for new LIS3DHTR chip
       d# 400,000 to bus-speed
-      d#   80 to min-x  d#   80 to min-y  d#   80 to min-z
+      d#   80 to min-x  d#   20 to min-y  d#   80 to min-z
       d# 1700 to max-x  d# 1700 to max-y  d# 1400 to max-z
       h# 19 1 reg