Allow skytraq to be on non-default serial port

Provide ao_gps_getchar, ao_gps_putchar and ao_gps_set_speed hooks to
let product specify functions for serial access.

Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/src/drivers/ao_gps_skytraq.c b/src/drivers/ao_gps_skytraq.c
index 050573e877282012acf1776668396f980822bfdf..39e36cc8e32a1ffe86497ca3a30703af8b01613e 100644 (file)
--- a/src/drivers/ao_gps_skytraq.c
+++ b/src/drivers/ao_gps_skytraq.c
@@ -19,6 +19,18 @@
 #include "ao.h"
 #endif
 
+#ifndef ao_gps_getchar
+#define ao_gps_getchar ao_serial_getchar
+#endif
+
+#ifndef ao_gps_putchar
+#define ao_gps_putchar ao_serial_putchar
+#endif
+
+#ifndef ao_gps_set_speed
+#define ao_gps_set_speed       ao_serial_set_speed
+#endif
+
 __xdata uint8_t ao_gps_mutex;
 static __data char ao_gps_char;
 static __data uint8_t ao_gps_cksum;
@@ -68,7 +80,7 @@ ao_gps_lexchar(void)
        if (ao_gps_error)
                c = '\n';
        else
-               c = ao_serial_getchar();
+               c = ao_gps_getchar();
        ao_gps_cksum ^= c;
        ao_gps_char = c;
 }
@@ -402,7 +414,7 @@ ao_skytraq_sendbytes(__code uint8_t *b, uint8_t l)
                uint8_t c = *b++;
                if (c == 0xa0)
                        ao_delay(AO_MS_TO_TICKS(500));
-               ao_serial_putchar(c);
+               ao_gps_putchar(c);
        }
 }
 
@@ -444,7 +456,7 @@ ao_gps_nmea_parse(void)
 void
 ao_gps(void) __reentrant
 {
-       ao_serial_set_speed(AO_SERIAL_SPEED_9600);
+       ao_gps_set_speed(AO_SERIAL_SPEED_9600);
 
        /* give skytraq time to boot in case of cold start */
        ao_delay(AO_MS_TO_TICKS(2000));
@@ -453,7 +465,7 @@ ao_gps(void) __reentrant
 
        for (;;) {
                /* Locate the begining of the next record */
-               if (ao_serial_getchar() == '$') {
+               if (ao_gps_getchar() == '$') {
                        ao_gps_nmea_parse();
                }
        }