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1441a9ef MR |
1 | ------------------------------------------------------------------------------- |
2 | MTK3339 GPS NMEA UART output | |
3 | ------------------------------------------------------------------------------- | |
4 | ||
5 | This is a dump of NMEA data from MTK3339 GPS Adafruit Breakout's UART output. | |
6 | ||
7 | For details see: | |
8 | http://www.adafruit.com/products/746 | |
9 | http://www.adafruit.com/datasheets/GlobalTop-FGPMMOPA6H-Datasheet-V0A.pdf | |
10 | ||
11 | ||
12 | Logic analyzer setup | |
13 | -------------------- | |
14 | ||
15 | The logic anlyzer used was a Open Logic Sniffer at a sample rate of 200KHz for | |
16 | using a baud rate of 9600 8N1. | |
17 | ||
18 | Probe UART | |
19 | ---------------- | |
20 | 0 TX | |
21 | ||
22 | ||
23 | Data | |
24 | ---- | |
25 | ||
26 | The sigrok command line used was: | |
27 | ||
28 | sigrok-cli --driver=ols:conn=/dev/ttyACM0 --config rle=1:samplerate=<hz> \ | |
29 | --samples=1000000 -p '0=TX' --triggers 'TX=0' -o <file>.sr | |
30 | Device only sent 845282 samples. | |
31 | ||
32 | We capture as many samples as the RLE mode can handle. |