![](/media/cache/profiles/f0fcf351df4eb6786e9bb6fc4e2dee02.jpg.50x50_q85.jpg)
Very simple but enough accuracy "Frequency Counter". Using GPS 1PPS signal for 1sec gate. CPU is F746, F446 and F411.
Dependencies: fc_GPS1PPS_f746_f4xx iSerial mbed
Please refer following.
/users/kenjiArai/notebook/frequency-counters/
Concept block are follows.
F746
/media/uploads/kenjiArai/block_diagram_fc_f746_wo_oven.pdf
F411&F446
/media/uploads/kenjiArai/block_diagram_fc_f411_wo_oven.pdf
Hardware Circuit(common F746,F446 and F411)
/media/uploads/kenjiArai/fc_f746ng_circuit.pdf
Diff: GPS_rcvr/GPSrcvr.h
- Revision:
- 0:da29cdc50643
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/GPS_rcvr/GPSrcvr.h Wed Nov 16 13:22:00 2016 +0000 @@ -0,0 +1,75 @@ +/* + * mbed Application program / GPS receiver control and 1PPS output + * + * Copyright (c) 2004,'09,'10,'16 Kenji Arai / JH1PJL + * http://www.page.sannet.ne.jp/kenjia/index.html + * http://mbed.org/users/kenjiArai/ + * Created: March 28th, 2004 Kenji Arai + * updated: July 25th, 2009 for PIC24USB + * updated: January 16th, 2010 change to GPS-GM318 + * updated: April 24th, 2010 for mbed / NXP LPC1768 + * Revised: Nomeber 14th, 2016 + */ + +// Definition ----------------------------------------------------------------- +// GPS data selection & buffer size +/* $GPGAA,hhmmss.sss,ddmm.mmmmmm,N,dddmm.mmmmmm, + E,1,xx,xx.xx,xx.xxx,M,xx.xxx,M,s.ss,xxxx*sum<CR><LF> + ex. $GPGGA,060306.00,4344.77894,N,14223.38857, + E,2,11,0.9,128.4,M,28.8,M,5.0,0129*4C<CR><LF> + # of data (ex.) = 81 +*/ +#define SIZE_BUF_GGA 96 +/* + $GPGSA,A,3,xx,xx,,,xx,xx,,,,,xx.x,xx.x,xx.x*sum<CR><LF> + ex. $GPGSA,A,3,03,06,13,16,21,23,24,25,29,31,42,50,1.9,0.9,1.7*3C + # of data (ex.) = 63 +*/ +#define SIZE_BUF_GSA 80 +/* + $GPGSV,x,x,xx*sum<CR><LF> + ex. $GPGSV,3,1,12,03,39,225,47,06,55,217,48,13,21,314,48,16,74,342,50*76 + $GPGSV,3,2,12,21,33,095,50,23,32,280,50,24,18,049,42,25,12,315,43*7E + $GPGSV,3,3,12,29,12,047,45,31,49,146,49,42,39,183,46,50,39,176,42*7C + # of data (ex.) = 70 +*/ +#define SIZE_BUF_GSV 80 +/* + $GPRMC,hhmmss.sss,V,ddmm.mmmm,N,dddmm.mmmm,E,k.kkk,x.xx,ddmmyy,,,N*sum<CR><LF> + ex. $GPRMC,060309.00,A,4344.77571,N,14223.38879, + E,0.03,210.32,190808,06.2,W,D*51 + # of data (ex.) = 84 +*/ +#define SIZE_BUF_RMC 96 +/* + $GPVTG,xx.xx,T,,M,x.xx,N,x.xx,K,A*sum<CR><LF> + ex. $GPVTG,210.32,T,204.30,M,0.03,N,0.06,K,D*3F + # of data (ex.) = 43 +*/ +#define SIZE_BUF_VTG 64 +/* + $GPZDA,hhmmss.sss,dd,mmm,yyyy,hh,mm*sum<CR><LF> + ex. $GPZDA,060307.00,19,08,2008,13,26*6E + # of data (ex.) = 36 +*/ +#define SIZE_BUF_ZDA 48 +/* + $GPGLL,ddmm.mmmmmm,N,dddmm.mmmmmm,E,hhmmss.sss,V,D*sum<CR><LF> + ex. $GPGLL,4344.77956,N,14223.38863,E,060305.00,A,D*61 + # of data (ex.) = 52 +*/ +#define SIZE_BUF_GLL 64 + +#define ERR 0xff + +//------------------------------------------------------------------------------ + +#ifndef _IGPSRCV_H +#define _IGPSRCV_H + +void gps_data_rcv(void); // make sure !! infinit loop on RTOS +bool check_gps_is_okay(void); +uint8_t check_gps_3d(void); + +#endif /* _IGPSRCV_H */ +