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GPS Distance calculation fix

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This commit is contained in:
romolo.manfredini@gmail.com 2012-02-14 15:41:22 +00:00
parent 99be733e29
commit 65621cae81
1 changed files with 6 additions and 5 deletions
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11
src/frsky.cpp
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@ -587,9 +587,10 @@ uint16_t sqrt32(uint32_t n)
void getGpsPilotPosition() void getGpsPilotPosition()
{ {
frskyHubData.pilotLatitude = ((frskyHubData.gpsLatitude_bp / 100) * 1000000) + (((frskyHubData.gpsLatitude_bp % 100) * 10000 + frskyHubData.gpsLatitude_ap) * 5) / 3; frskyHubData.pilotLatitude = (((uint32_t)frskyHubData.gpsLatitude_bp / 100) * 1000000) + (((frskyHubData.gpsLatitude_bp % 100) * 10000 + frskyHubData.gpsLatitude_ap) * 5) / 3;
frskyHubData.pilotLongitude = ((frskyHubData.gpsLongitude_bp / 100) * 1000000) + (((frskyHubData.gpsLongitude_bp % 100) * 10000 + frskyHubData.gpsLongitude_ap) * 5) / 3; frskyHubData.pilotLongitude = (((uint32_t)frskyHubData.gpsLongitude_bp / 100) * 1000000) + (((frskyHubData.gpsLongitude_bp % 100) * 10000 + frskyHubData.gpsLongitude_ap) * 5) / 3;
uint32_t angle2 = ((uint32_t)frskyHubData.gpsLatitude_bp*(uint32_t)frskyHubData.gpsLatitude_bp) / 10000; uint32_t lat = ((uint32_t)frskyHubData.gpsLatitude_bp/100)*100+ (((uint32_t)frskyHubData.gpsLatitude_bp % 100)*5)/3;
uint32_t angle2 = (lat*lat) / 10000;
uint32_t angle4 = angle2 * angle2; uint32_t angle4 = angle2 * angle2;
frskyHubData.distFromEarthAxis = 139*(((uint32_t)10000000-((angle2*(uint32_t)123370)/81)+(angle4/25))/12500); frskyHubData.distFromEarthAxis = 139*(((uint32_t)10000000-((angle2*(uint32_t)123370)/81)+(angle4/25))/12500);
// printf("frskyHubData.distFromEarthAxis=%d\n", frskyHubData.distFromEarthAxis); fflush(stdout); // printf("frskyHubData.distFromEarthAxis=%d\n", frskyHubData.distFromEarthAxis); fflush(stdout);
@ -597,8 +598,8 @@ void getGpsPilotPosition()
uint32_t getGpsDistanceX2() uint32_t getGpsDistanceX2()
{ {
uint32_t lat = ((frskyHubData.gpsLatitude_bp / 100) * 1000000) + (((frskyHubData.gpsLatitude_bp % 100) * 10000 + frskyHubData.gpsLatitude_ap) * 5) / 3; uint32_t lat = (((uint32_t)frskyHubData.gpsLatitude_bp / 100) * 1000000) + (((frskyHubData.gpsLatitude_bp % 100) * 10000 + frskyHubData.gpsLatitude_ap) * 5) / 3;
uint32_t lng = ((frskyHubData.gpsLongitude_bp / 100) * 1000000) + (((frskyHubData.gpsLongitude_bp % 100) * 10000 + frskyHubData.gpsLongitude_ap) * 5) / 3; uint32_t lng = (((uint32_t)frskyHubData.gpsLongitude_bp / 100) * 1000000) + (((frskyHubData.gpsLongitude_bp % 100) * 10000 + frskyHubData.gpsLongitude_ap) * 5) / 3;
// printf("lat=%d (%d), long=%d (%d)\n", lat, abs(lat - frskyHubData.pilotLatitude), lng, abs(lng - frskyHubData.pilotLongitude)); // printf("lat=%d (%d), long=%d (%d)\n", lat, abs(lat - frskyHubData.pilotLatitude), lng, abs(lng - frskyHubData.pilotLongitude));