[RK3288] [Android 7.1] u-blox GPS调试

我这里GPS使用的是TTL串口GPS芯片,用的是uart0

1.确认原理图对应的uart节点，将其打开

&uart0 {
        status = "okay";
        dma-names = "!tx", "!rx";
        pinctrl-0 = <&uart0_xfer &uart0_cts>;
};

2.在hal层编译出 gps.default.so 目录在hardware/rockchip/gps/

有的目录下自带ublox  没有的话自己添加一个编译出so库

在gps_zkw_v3.c中   #define GNSS_TTY "/dev/ttyS0"  选择你主板使用的串口号

代码下载：https://pan.baidu.com/s/1nuZqAmWTevsc1VmBg-gAjQ   提取码：s677

3.在device/rockchip目录下面grep 一下与gps相关的东西。

device/rockchip/common/BoardConfig.mk

-BOARD_HAS_GPS ?= false   
+BOARD_HAS_GPS ?= true   
+BOARD_GPS_TYPE ?= ublox

device/rockchip/rk3288/system.prop

-persist.sys.gpsTTY=/dev/ttyS3
+persist.sys.gpsTTY=/dev/ttyS0

编译烧录后可先查看串口信息：

rk3288:/ $ cat /dev/ttyS0                                                      
$GPRMC,033843.00,A,2231.85141,N,11403.89116,E,0.156,,300519,,,D*7D
$GPVTG,,T,,M,0.156,N,0.288,K,D*26
$GPGGA,033843.00,2231.85141,N,11403.89116,E,2,11,2.38,265.5,M,-2.3,M,,0000*4A
$GPGSA,A,3,11,18,23,50,01,42,09,22,08,30,07,,3.48,2.38,2.53*0F
$GPGSV,5,1,17,01,42,170,44,03,00,176,,04,29,264,26,07,56,321,29*7D
$GPGSV,5,2,17,08,56,008,24,09,29,241,30,11,68,196,31,16,18,076,21*75
$GPGSV,5,3,17,18,59,135,44,22,06,157,27,23,21,201,34,26,00,096,34*71

串口获取信息正常，在设置--位置信息--模式--模式选择 高精确度

最后安装gpstest.apk收星测试，