Hi,
I'm using sabre sdp development board, it has on board GPS module(AH1613).
it's not working on android lollipop.
There is no gps configuration on init.rc & init.freescale.rc and there is no gps libraries on the system & vendor folders....
How to support GPS android lollipop 5.0.0 sdk?
Thanks,
Narasimma
Hi Narasimma,
You can refer to Gudielines on 3G modem integration, hope this can help you.
Have a great day,
Dan
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Hi Dan,
Thanks for the replay..
I updated the GPS related libraries, and enabled gps service in "init.freescale.rc" file on ANDROID 5.0 SDK, but also it's not working..
So i probed the some pin voltages on the GPS Module and compared with Android 4.2 image which has a working GPS...
Here are my observations...
Pin No. Signal Name Android 4.2 Android 5.0
1 GPS_RFIN 3.098V 2.231V
5 GPS_VBAT 1.498V 0.211V
11 GPS_VDD 3.097V 2.198V
13 RESET 3.230V 3.227V
17 GPS_MODE 0 0
20 1PPS 3.193V 2.519V
30 GPS_RXD 3.097V 2.531V
31 GPS_TXD 3.233V 3.041V
There are lot voltage differences between Android 4.2 and Android 5.0 on GPS module...
Is there any modifications needed on kernel?
How can i resolve this issue?
Thanks,
-Narasimma
Hi,
I found the problem for voltage differences...
In Android Lollipop SDK they are not enabled gpio's the following signals to power up the GPS Module...
1. AUX_3V15_EN GPIO(6, 9)
2. GPS_EN GPIO(3, 0)
3. GPS_PPS GPIO(3, 18)
So I manually pulled up these gpio's on the sysfs, after this i got the same voltages in all the pins compared with android 4.2, but thereafter also not working...
There are some device node's missing related to GPS on "/dev" directory...
Here is list of dev nods...
1. /dev/athrnmea
2. /dev/athrpipein
3. /dev/athrpipeout
Is there any kernel module required for GPS?
How can i solve this issue?
Regards,
Narasimma