Re: [gpsd-users] NTP1 keeps going away.

[stinga]

On 09/11/17 21:20, Gary E. Miller wrote:
> Yo stinga!
>
> On Thu, 9 Nov 2017 21:00:47 +0000
> stinga <address@hidden> wrote:
>
> > Don't think it is this as the 5 was a coincidence I have seen more
> > pulses on occasions.
> Which could be a flakey PPS signal.  Which is why you need to look
> with an oscope.
>
> Maybe just use a jumper to connect gnd ad 3.3V to the PPS pin and see is
> ppstest sees it.
Using watch -n0.001 gpio readall I can see physical pin 18 changing, 
this is gpio5

address@hidden:~# gpio readall
 +-----+-----+---------+------+---+-Model 
B1-+---+------+---------+-----+-----+
 | BCM | wPi |   Name  | Mode | V | Physical | V | Mode | Name    | wPi 
| BCM |
 +-----+-----+---------+------+---+----++----+---+------+---------+-----+-----+
 |     |     |    3.3v |      |   |  1 || 2  |   |      | 5v      |     
|     |
 |   2 |   8 |   SDA.1 |   IN | 1 |  3 || 4  |   |      | 5v      |     
|     |
 |   3 |   9 |   SCL.1 |   IN | 1 |  5 || 6  |   |      | 0v      |     
|     |
 |   4 |   7 | GPIO. 7 |   IN | 1 |  7 || 8  | 1 | ALT0 | TxD     | 15  
| 14  |
 |     |     |      0v |      |   |  9 || 10 | 1 | ALT0 | RxD     | 16  
| 15  |
 |  17 |   0 | GPIO. 0 |   IN | 0 | 11 || 12 | 0 | IN   | GPIO. 1 | 1   
| 18  |
 |  27 |   2 | GPIO. 2 |   IN | 0 | 13 || 14 |   |      | 0v      |     
|     |
 |  22 |   3 | GPIO. 3 |   IN | 0 | 15 || 16 | 0 | IN   | GPIO. 4 | 4   
| 23  |
 |     |     |    3.3v |      |   | 17 || 18 | 1 | IN   | GPIO. 5 | 5   
| 24  |
 |  10 |  12 |    MOSI |   IN | 0 | 19 || 20 |   |      | 0v      |     
|     |
 |   9 |  13 |    MISO |   IN | 0 | 21 || 22 | 0 | IN   | GPIO. 6 | 6   
| 25  |
 |  11 |  14 |    SCLK |   IN | 0 | 23 || 24 | 1 | IN   | CE0     | 10  
| 8   |
 |     |     |      0v |      |   | 25 || 26 | 1 | IN   | CE1     | 11  
| 7   |
 +-----+-----+---------+------+---+----++----+---+------+---------+-----+-----+
 | BCM | wPi |   Name  | Mode | V | Physical | V | Mode | Name    | wPi 
| BCM |
 +-----+-----+---------+------+---+-Model 
B1-+---+------+---------+-----+-----+

I assume
dtoverlay=pps-gpio,gpiopin=18
Relates to physical pin 18, I have had this working, it ran for a week 
with a hicup at one point but now refuses to work.
But since I have been changing things maybe I have mucked the pins up.

Yet
address@hidden:~# ppstest /dev/pps0
trying PPS source "/dev/pps0"
found PPS source "/dev/pps0"
ok, found 1 source(s), now start fetching data...
time_pps_fetch() error -1 (Connection timed out)
time_pps_fetch() error -1 (Connection timed out)

So the gpio pin is pulsing, the pi is detecting it, but maybe there is 
some disconnect to the kernel?

I think I am going to start again with the pi3 on a clean install.

--
'ooroo

Stinga...(:)-)
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