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/**
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/**
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 * convert the <heading> gotton from NC into a more
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 * convert the <heading> gotton from NC into a more
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 * precise index
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 * precise index
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 */
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 */
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uint8_t heading_fine_conv(uint16_t heading) {
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uint8_t heading_fine_conv(uint16_t heading) {
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        if (heading > 337) return 0;
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        heading = ((heading * 10) + 113) % 3600;
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        return (heading * 10) / 225;
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        return (heading / 225);
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}
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}
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/**
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/**
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 * draw a compass rose at <x>/<y> for <heading>
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 * draw a compass rose at <x>/<y> for <heading>
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        /*write_ndigit_number_s_10th(5, 10, 1, 100, 0);
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        /*write_ndigit_number_s_10th(5, 10, 1, 100, 0);
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        write_ndigit_number_s_10th(5, 11, -1, 100, 0);
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        write_ndigit_number_s_10th(5, 11, -1, 100, 0);
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        write_ndigit_number_s_10th(5, 12, -11, 100, 0);*/
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        write_ndigit_number_s_10th(5, 12, -11, 100, 0);*/
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        //write_ndigit_number_u(2,2, heading_fine_conv(34), 100, 0);
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        //write_ndigit_number_u(2,2, heading_fine_conv(45), 100, 0);
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        //write_char_xy(1, 2, 0xa0 + heading_fine_conv(34));
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    while (1) {
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    while (1) {