From 69d5ea5dac279296156944be06673d8983b059b9 Mon Sep 17 00:00:00 2001 From: destradaa Date: Thu, 31 Jul 2014 16:34:09 -0700 Subject: [PATCH] Add HAL capabilities for GPS Measurements and Navigation Messages. Change-Id: I2ed41f2c048cfe82a539b3a4e955305787731a95 --- include/hardware/gps.h | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/include/hardware/gps.h b/include/hardware/gps.h index 5747faa..eb44d5c 100644 --- a/include/hardware/gps.h +++ b/include/hardware/gps.h @@ -110,6 +110,10 @@ typedef uint16_t GpsLocationFlags; #define GPS_CAPABILITY_ON_DEMAND_TIME 0x0000010 /** GPS supports Geofencing */ #define GPS_CAPABILITY_GEOFENCING 0x0000020 +/** GPS supports Measurements */ +#define GPS_CAPABILITY_MEASUREMENTS 0x0000040 +/** GPS supports Navigation Messages */ +#define GPS_CAPABILITY_NAV_MESSAGES 0x0000080 /** Flags used to specify which aiding data to delete when calling delete_aiding_data(). */ @@ -1690,7 +1694,7 @@ typedef struct { /** * The length of the data (in bytes) contained in the current message. * If this value is different from zero, 'data' must point to an array of the same size. - * i.e. for L1 C/A the size of the sub-frame will be 40 bytes (10 words). + * e.g. for L1 C/A the size of the sub-frame will be 40 bytes (10 words, 30 bits/word). * * This is a Mandatory value. */ @@ -1699,6 +1703,9 @@ typedef struct { /** * The data of the reported GPS message. * The bytes (or words) specified using big endian format (MSB first). + * + * For L1 C/A, each subframe contains 10 30-bit GPS words. Each GPS word (30 bits) should be + * fitted into the last 30 bits in a 4-byte word (skip B31 and B32), with MSB first. */ uint8_t* data; -- 2.11.0