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| author | H. Nikolaus Schaller <hns@goldelico.com> | 2012-10-13 08:22:02 +0200 |
|---|---|---|
| committer | H. Nikolaus Schaller <hns@goldelico.com> | 2012-10-13 08:22:02 +0200 |
| commit | a1e3e7a2f7e812cec0627afedf1bc6c85aea4999 (patch) | |
| tree | a45e837c8443ab2182ebf592c8c08516e0df848b /u-boot/board/goldelico/gta04/gps.c | |
| parent | 7e4b84a1e9da223acab3bd833530d25763f19b80 (diff) | |
| download | bootable_bootloader_goldelico_gta04-a1e3e7a2f7e812cec0627afedf1bc6c85aea4999.zip bootable_bootloader_goldelico_gta04-a1e3e7a2f7e812cec0627afedf1bc6c85aea4999.tar.gz bootable_bootloader_goldelico_gta04-a1e3e7a2f7e812cec0627afedf1bc6c85aea4999.tar.bz2 | |
added option to read PPS impulse; fixed GPIO assignments
Diffstat (limited to 'u-boot/board/goldelico/gta04/gps.c')
| -rw-r--r-- | u-boot/board/goldelico/gta04/gps.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/u-boot/board/goldelico/gta04/gps.c b/u-boot/board/goldelico/gta04/gps.c index 7f74dc8..9383a88 100644 --- a/u-boot/board/goldelico/gta04/gps.c +++ b/u-boot/board/goldelico/gta04/gps.c @@ -36,11 +36,13 @@ #define GPIO_GPSEXT 144 // external GPS antenna plugged in #define GPIO_GPS_ON 145 // reset for GPS module +#define GPIO_GPS_PPS 114 // Pulse per Second interrupt #else /* Beagle Hybrid */ -#define GPIO_GPSEXT 138 // external GPS antenna plugged in +#define GPIO_GPSEXT 144 // external GPS antenna plugged in #define GPIO_GPS_ON 156 +#define GPIO_GPS_PPS 138 // Pulse per Second interrupt #endif @@ -69,6 +71,8 @@ int gps_init(void) omap_set_gpio_direction(GPIO_GPS_ON, 0); // output omap_request_gpio(GPIO_GPSEXT); omap_set_gpio_direction(GPIO_GPSEXT, 1); // input + omap_request_gpio(GPIO_GPS_PPS); + omap_set_gpio_direction(GPIO_GPS_PPS, 1); // input return 0; } @@ -87,6 +91,7 @@ void gps_off(void) } static int lastant=-1; +static int lastpps=-1; static long timer; #define TIMEOUT 2 // in seconds @@ -100,13 +105,20 @@ void gps_echo(void) while (1) { // echo in both directions int ant=omap_get_gpio_datain(GPIO_GPSEXT); + int pps=omap_get_gpio_datain(GPIO_GPS_PPS); if(ant != lastant) { // changed - if(ant) - printf("external antenna\n"); - else - printf("internal antenna\n"); - lastant=ant; + if(ant) + printf("external antenna\n"); + else + printf("internal antenna\n"); + lastant=ant; + } + if(pps != lastpps) + { // comes only with >= 5 satellites + if(lastpps >= 0) + printf("PPS\n"); + lastpps=pps; } if(NS16550_tstc((NS16550_t)CONFIG_SYS_NS16550_COM2)) { @@ -126,7 +138,7 @@ void gps_echo(void) printf("no data: on-off impulse\n"); omap_set_gpio_dataout(GPIO_GPS_ON, 1); udelay(5000); - omap_set_gpio_dataout(GPIO_GPS_ON, 1); + omap_set_gpio_dataout(GPIO_GPS_ON, 0); timer=0; } udelay(100); // 10 kHz @ 9 kbit/s |