kopia lustrzana https://github.com/mikaelnousiainen/RS41ng
33 wiersze
862 B
C
33 wiersze
862 B
C
// Based on HamLib's locator routines
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// OK1TE 2018-10
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#include "locator.h"
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#include "config.h"
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const static uint8_t loc_char_range[] = { 18, 10, 24, 10, 24, 10 };
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const float precision = 1E+7;
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uint8_t longlat2locator(int32_t longitude, int32_t latitude, char locator[]) {
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if (!locator)
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return 0;
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for (uint8_t x_or_y = 0; x_or_y < 2; ++x_or_y) {
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float ordinate = ((x_or_y == 0) ? (longitude / 2) / precision : latitude / precision) + 90;
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uint32_t divisions = 1;
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for (uint8_t pair = 0; pair < PAIR_COUNT; ++pair) {
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divisions *= loc_char_range[pair];
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const float square_size = 180.0 / divisions;
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uint8_t locvalue = (uint8_t) (ordinate / square_size);
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ordinate -= square_size * locvalue;
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locvalue += (loc_char_range[pair] == 10) ? '0':'A';
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locator[pair * 2 + x_or_y] = locvalue;
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}
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}
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locator[PAIR_COUNT * 2] = 0;
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return 1;
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}
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