* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
-use ringbuf::Ringbuf;
use systick;
enum ParseState {
c | 0x20
}
-fn try_read() -> Option<u8> {
- extern {
- static mut uart0_rx_buf: Ringbuf;
- }
-
- unsafe {
- if uart0_rx_buf.is_empty() {
- None
- } else {
- Some(uart0_rx_buf.read())
- }
- }
-}
-
fn parse_coordinate(s: &[u8]) -> i32 {
// Find the position of the decimal separator for the minutes.
let dot_position = s.iter().enumerate().find(|(_, &c)| {
}
}
- pub fn update(&mut self, tap: &mut TimeAndPos) -> bool {
+ pub fn update<F>(&mut self, tap: &mut TimeAndPos, mut read_func: F) -> bool
+ where F: FnMut() -> Option<u8>
+ {
let hexdigits = b"0123456789abcdef";
- while let Some(received) = try_read() {
+ while let Some(received) = read_func() {
if received == b'$' {
self.state = ParseState::InPacket;
self.offset = 0;
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 {