Measurement-computing LogBook Series Instrukcja Użytkownika Pobierz pdf (Strona 98)

6-10 GPS and Serial Device Data Collection 958396 LogBook User’s Manual

Channel Type Selection Table

The following table shows the required channel type selection for each valid conversion type specifier. This

table does not apply to format directives using the reject indicator ("*"). The Sx in the table represents serial

ports S1 or S2.

Conversion Type

Specifier

Description Required

Channel Type

Value Range

c character Sx_Char –128 to 127

d signed decimal integer Sx_Int –32,768 to 32,767

e scientific notation floating point Sx_Float 3.4E +/- 38 (7 digits)

f non-scientific notation floating point Sx_Float 3.4E +/- 38 (7 digits)

g either e or f formats Sx_Float 3.4E +/- 38 (7 digits)

i optional signed octal, hexadecimal, or decimal

integer

Sx_Int –32,768 to 32,767

o octal integer Sx_Int –32,768 to 32,767

s string (reject only) N/A N/A

u unsigned decimal integer Sx_Int 0 to 65535

x hexadecimal integer Sx_Int –32,768 to 32,767

% N/A N/A N/A

GPS Examples

The following block of characters is an example of typical GPS receiver data:

$GPRMC,011855,V,4022.1990,N,08249.1990,W,000.0,000.0,150470,006.7,W*6C

$GPGGA,011855,4022.1990,N,08249.1990,W,0,00,,,M,,M,,*44

$GPGSA,A,1,,,,,,,,,,,,,,,*1E

$GPGSV,3,1,12,12,00,000,,14,00,000,,15,00,000,,16,00,000,*7D

$GPGSV,3,2,12,17,00,000,,18,00,000,,19,00,000,,20,00,000,*7E

$GPGSV,3,3,12,21,00,000,,22,00,000,,23,00,000,,24,00,000,*7E

The following example demonstrates how to retrieve information from the first few fields of the

Global Positioning System Fix Data (GGA) line:

$GPGGA,011855,4022.1990,N,08249.1990,W,0,00,,,M,,M,,*44

Field Name Field Description

Start of Sentence $

Address Field “aaccc” where “aa” is the talker identifier mnemonic (GP for Global

Positioning System) and “ccc” is the sentence formatter mnemonic (GGA for

Global Positioning System Fix Data)

Universal Time Coordinated (UTC) “hhmmss.ss” where “hh” is hours (0 to 23), “mm” is minutes (00 to 59) and

“ss.ss” is seconds (00.00 to 59.99)

Latitude “ddmm.mm” where “dd” is degrees (0 to 89) and “mm.mm” is minutes

(00.00 to 59.99)

Latitude N/S N=North, S=South

Longitude “dddmm.mm” where “ddd” is degrees (0 to 179) and “mm.mm” is minutes

(00.00 to 59.99)

Longitude E/W E=East, W=West

The format string of all serial input channels parsing information from the GGA line should start with “$GPGGA,”

so that all other serial input strings fail to match and are ignored.

1 2 ... 93 94 95 96 97 98 99 100 101 102 103 ... 221 222

Komentarze do niniejszej Instrukcji

Brak uwag

Measurement-computing LogBook Series Instrukcja Użytkownika Strona 98

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Sprzęt komputerowy Measurement-computing LogBook Series