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| author | H. Nikolaus Schaller <hns@goldelico.com> | 2011-12-22 20:58:49 +0100 |
|---|---|---|
| committer | H. Nikolaus Schaller <hns@goldelico.com> | 2011-12-22 20:58:49 +0100 |
| commit | 5255625dfd859f9caadd292f582f2b7018d8d9f4 (patch) | |
| tree | 4a51a60d697bdd8da2fd54a2df83f15857766167 | |
| parent | 0e8fe219fde0a31420afb7a6b5e4156572e1e523 (diff) | |
| download | bootable_bootloader_goldelico_gta04-5255625dfd859f9caadd292f582f2b7018d8d9f4.zip bootable_bootloader_goldelico_gta04-5255625dfd859f9caadd292f582f2b7018d8d9f4.tar.gz bootable_bootloader_goldelico_gta04-5255625dfd859f9caadd292f582f2b7018d8d9f4.tar.bz2 | |
auto-wakeup GPS chip
| -rw-r--r-- | board/goldelico/gta04/gps.c | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/board/goldelico/gta04/gps.c b/board/goldelico/gta04/gps.c index e6c23e5..7f74dc8 100644 --- a/board/goldelico/gta04/gps.c +++ b/board/goldelico/gta04/gps.c @@ -87,6 +87,9 @@ void gps_off(void) } static int lastant=-1; +static long timer; + +#define TIMEOUT 2 // in seconds void gps_echo(void) { @@ -106,12 +109,28 @@ void gps_echo(void) lastant=ant; } if(NS16550_tstc((NS16550_t)CONFIG_SYS_NS16550_COM2)) + { putc(NS16550_getc((NS16550_t)CONFIG_SYS_NS16550_COM2)); // from GPS to console - // fixme: until we press ctl-C + timer=0; // data received + } if(tstc()) - break; // NS16550_putc((NS16550_t)CONFIG_SYS_NS16550_COM2, getc()); + { + int c=getc(); + if(c == 0x03) // ctrl-C + break; + // NS16550_putc((NS16550_t)CONFIG_SYS_NS16550_COM2, c); + break; + } + if(timer++ > 2*10000) + { // timeout - try to wakeup/reset the chip + 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); + timer=0; + } + udelay(100); // 10 kHz @ 9 kbit/s } - getc(); printf("\n"); } |