Project:HM55B: Difference between revisions
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→Converting the reading to an angle
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In the example: | In the example: | ||
<pre> | |||
x = 0b11111101101 | x = 0b11111101101 | ||
y = 0b11111101111 | y = 0b11111101111 | ||
</pre> | |||
''The Hitachi HM55B chip on the Compass Module reports its x and y axis measurements in terms of microteslas (μT) in 11-bit signed values.'' | ''The Hitachi HM55B chip on the Compass Module reports its x and y axis measurements in terms of microteslas (μT) in 11-bit signed values.'' | ||
Since both most significant bits equal one, x and y are negative and we take the two's complement: | Since both most significant bits equal one, x and y are negative and we take the two's complement: | ||
<pre> | |||
11111101101 | 11111101101 | ||
00000010010 | 00000010010 | ||
00000010011 | 00000010011 | ||
</pre> | |||
x = -19 | x = -19 | ||
<pre> | |||
11111101111 | 11111101111 | ||
00000010000 | 00000010000 | ||
00000010001 | 00000010001 | ||
</pre> | |||
y = -17 | y = -17 | ||
