GPS使用--tinkerboard/Tinker board S (linux下)

gps on Tinker Board
1，烧录最新的tinkerOS_Debian

Module: NEO6M GPS Module

• Default Baud rate: 9600 bps
• VCC: 3.3-5.5V
• PPS: clock pulse output pin
  
  

Connect GPIO:

• VCC to Pin 17
• TX to Pin 37, which is RX
• RX to Pin 36, Which is TX
• Gnd to Pin 34, which is Gnd
• PPS to Pin 22, which is GP5C3
  

安装gpsd software:

1. $ sudo apt-get install gpsd gpsd-clients python-gps

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GPS raw data output:

GPS raw data format:

GPS NMEA Protocol: The hardware interface for GPS units is designed to meet the NMEA requirements.
Global Positioning System Fix Data（GGA）
$GPGGA,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,M,<10>,M,<11>,<12>*hh

• <2> latitude: ddmm.mmmm（度分）format
• <4> longitude: dddmm.mmmm（度分）format
  

format	latitude	longitude
ddmm.mmmm	2507.45727	12128.17944
dd°mm'ss"	25°07'27.4362"	121°28'10.7664"

设置 pps on Tinker Board
修改 hw_intf.conf文件

1. # Add a new line
   
2. 
   
3. intf:dtoverlay=pps-gpio

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Checking that PPS is working

1. $ dmesg |grep pps
   
2. 
   
3. [ 1.972430] pps_core: LinuxPPS API ver. 1 registered
   
4. [ 1.972441] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
   
5. [ 3.361780] rockchip-pinctrl pinctrl: unable to find group for node pps_pins
   
6. [ 3.368916] of_get_named_gpiod_flags: parsed 'gpios' property of node '/pps[0]' - status (0)
   
7. [ 3.369360] pps_core: source pps.-1 got cdev (252:0)
   
8. [ 3.369381] pps pps0: new PPS source pps.-1
   
9. [ 3.369477] pps pps0: Registered IRQ 84 as PPS source</code>

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安装 PPS tool

1. $ apt-get install pps-tools

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测试 PPS

1. $ ppstest /dev/pps0

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https://tinkerboarding.co.uk/wiki/index.php?title=NEO-6M