laforge has submitted this change. ( https://gerrit.osmocom.org/c/osmo-e1-hardware/+/29610 )

Change subject: icE1usb fw/gpsdo: If no PPS present for >= 3s, go to hold over mode ......................................................................

icE1usb fw/gpsdo: If no PPS present for >= 3s, go to hold over mode

Signed-off-by: Sylvain Munaut tnt@246tNt.com Change-Id: Ia85a8bb0e146cb117ea6e2704c6a4dedf215c75a --- M firmware/ice40-riscv/icE1usb/gpsdo.c 1 file changed, 11 insertions(+), 0 deletions(-)

Approvals: Jenkins Builder: Verified laforge: Looks good to me, approved

diff --git a/firmware/ice40-riscv/icE1usb/gpsdo.c b/firmware/ice40-riscv/icE1usb/gpsdo.c index 573c0bb..2481c2e 100644 --- a/firmware/ice40-riscv/icE1usb/gpsdo.c +++ b/firmware/ice40-riscv/icE1usb/gpsdo.c @@ -15,6 +15,8 @@

#include "ice1usb_proto.h"

+#include "config.h" +

struct { /* Configuration */ @@ -275,6 +277,14 @@ uint32_t tick_now, tick_diff; bool valid;

+ /* If more than 3 sec elapsed since last PPS, go to hold-over */ + if (time_elapsed(g_gpsdo.meas.tick_prev, 3 * SYS_CLK_FREQ)) { + g_gpsdo.state = STATE_HOLD_OVER; + g_gpsdo.meas.invalid = 0; + g_gpsdo.meas.skip = 0; + return; + } + /* Get current tick and check if there was a PPS and estimate frequency */ tick_now = time_pps_read();

@@ -299,6 +309,7 @@ /* No GPS fix, go to hold-over */ g_gpsdo.state = STATE_HOLD_OVER; g_gpsdo.meas.invalid = 0; + g_gpsdo.meas.skip = 0; return; }