Adam M Rivera
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64c236800c
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AP_Declination: Moved check for y index of zero to after the y index is properly transformed.
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2012-03-30 14:21:58 +11:00 |
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Adam M Rivera
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e99d26cfa3
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AP_Declination: The exception signs unpacking logic was incorrect. I was shifting a 1 value left y%8 which would have needed a the signs to be packed right to left. My packed signs byte was packed left to right (left most being the 0 position) so I needed to reverse the shifting.
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2012-03-30 14:21:58 +11:00 |
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Adam M Rivera
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d9c9e0e608
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AP_Declination: In order for the bitwise & operation to work, negative signs need to be represented by 1s instead of 0s. Changed so that negative signs are represented by a 1 in the packed signs array. Updated lookup logic to reflect this change.
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2012-03-30 14:21:58 +11:00 |
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Adam M Rivera
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8b1c383f97
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AP_Declination: Updated packed exception signs array. I had the signs packed incorrectly.
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2012-03-30 14:21:57 +11:00 |
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Adam M Rivera
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c0813f8d62
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AP_Declination: Changed test to run in increments of 10 degrees. 1 was too granular.
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2012-03-30 14:21:57 +11:00 |
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Adam M Rivera
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289d7a2784
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AP_Declination: Added original array to test sketch. Added loop to validate new compressed array against original in 1 degree steps.
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2012-03-30 14:21:57 +11:00 |
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Adam M Rivera
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63ce400f77
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AP_Declination: Moved rows with large spikes in delta to their own unsigned exception rows. The signs are in a separate packed array.
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2012-03-30 14:21:57 +11:00 |
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Adam M Rivera
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782c1aaaa3
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AP_Declination: Implemented Delta Encoding and Run-Length Encoding. Added method to traverse the compressed array and return the lookup value based on the same lat_index/lon_index that was used before.
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2012-03-30 14:21:57 +11:00 |
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Adam M Rivera
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9888a4730f
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AP_Declination: Changed PROGMEM read function to pgm_read_word_far to support the int16_t datatype.
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2012-03-30 14:21:57 +11:00 |
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Adam M Rivera
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d883bdf75e
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AP_Declination: Changed datatype to int16_t to support the -90 <-> 90 latitude range.
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2012-03-30 14:21:57 +11:00 |
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Adam M Rivera
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719636d00c
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AP_Declination: Reduced the size of the lookup table to support -75 <-> 70 latitude range. This allows the datatype to remain int8_t.
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2012-03-30 14:21:57 +11:00 |
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Andrew Tridgell
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0e6037322a
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AP_Declination: fixed build of test sketch
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2012-03-12 17:33:15 +11:00 |
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Andrew Tridgell
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b4d69ef473
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AP_Declination: fixed usage of headers
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2012-03-11 20:59:47 +11:00 |
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Adam M Rivera
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ad3a20b6a3
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AP_Declination: Updated comment.
Signed-off-by: Andrew Tridgell <tridge@samba.org>
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2012-03-11 20:59:47 +11:00 |
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Adam M Rivera
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94d1c48544
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AP_Declination: Increased range of supported latitude coordinates.
Fixed incorrect type usage to save stack space.
Signed-off-by: Andrew Tridgell <tridge@samba.org>
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2012-03-11 20:59:47 +11:00 |
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Adam M Rivera
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1709403b87
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Added AP_Declination test sketch. I will be improving the test sketch soon.
Signed-off-by: Andrew Tridgell <tridge@samba.org>
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2012-03-11 20:59:47 +11:00 |
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Adam M Rivera
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3f28184cb0
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Added AP_Declination library. It contains the lookup table (lat/lng -> declination) as well as a method that performs the lookup.
Signed-off-by: Andrew Tridgell <tridge@samba.org>
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2012-03-11 20:59:47 +11:00 |
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