common: Accept DGPS fix information.

[gps-watch.git] / src / common / gps.rs

diff --git a/src/common/gps.rs b/src/common/gps.rs
index b9fcbc3f23d9a732676082fbc3cccac4d2535310..64772c775189526e06bec8cb8b604e8e7055c427 100644 (file)
--- a/src/common/gps.rs
+++ b/src/common/gps.rs
@@ -209,13 +209,17 @@ impl Gps {
         let hexdigits = b"0123456789abcdef";
 
         while let Some(received) = try_read() {
+            if received == b'$' {
+                self.state = ParseState::InPacket;
+                self.offset = 0;
+                self.checksum = 0x00;
+
+                continue;
+            }
+
             match self.state {
                 ParseState::Start => {
-                    if received == b'$' {
-                        self.state = ParseState::InPacket;
-                        self.offset = 0;
-                        self.checksum = 0x00;
-                    }
+                    // Empty.
                 },
                 ParseState::InPacket => {
                     if received == b'*' {
@@ -343,8 +347,16 @@ impl Gps {
                     return false;
                 }
 
-                if pos_fix_indicator != b"1" {
-                    return false;
+                match pos_fix_indicator {
+                    b"1" => {
+                        // Valid standard GPS fix (low resolution).
+                    },
+                    b"2" => {
+                        // Valid differential GPS fix (high resolution).
+                    },
+                    _ => {
+                        return false;
+                    }
                 }
 
                 if utc_time.len() < 6 {