From 2f7603490a169df8f18b565db4fa967832ffc9bd Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@keithp.com>
Date: Fri, 9 Oct 2009 22:48:29 -0700
Subject: [PATCH 1/1] Build two versions of TM, one for SiRF, one for SkyTraq

This creates two separate images, depending on which GPS unit is
connected.

Signed-off-by: Keith Packard <keithp@keithp.com>
---
 .gitignore         |  4 +++-
 src/Makefile       | 41 ++++++++++++++++++++++++++++++++++-------
 src/ao_teleterra.c |  1 -
 src/skytraq-cksum  | 44 ++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 81 insertions(+), 9 deletions(-)
 create mode 100644 src/skytraq-cksum

diff --git a/.gitignore b/.gitignore
index 0ca4bed4..a6f94439 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,6 +16,7 @@ TAGS
 aclocal.m4
 src/ao_flight_test
 src/ao_gps_test
+src/ao_gps_test_skytraq
 ao-teledongle.h
 ao-telemetrum.h
 ao-teleterra.h
@@ -47,6 +48,7 @@ missing
 stamp-h1
 tags
 teledongle
-telemetrum
+telemetrum-sirf
+telemetrum-sky
 teleterra
 tidongle
diff --git a/src/Makefile b/src/Makefile
index 892635cb..9891cdad 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -59,7 +59,6 @@ TELE_RECEIVER_SRC =\
 
 TELE_DRIVER_SRC = \
 	ao_convert.c \
-	ao_gps_skytraq.c \
 	ao_serial.c
 
 #
@@ -84,6 +83,17 @@ TM_DRIVER_SRC = \
 	ao_gps_report.c \
 	ao_ignite.c
 
+#
+# Drivers only on TeleMetrum
+#
+TM_SIRF_DRIVER_SRC = \
+	ao_gps_sirf.c
+#
+# Drivers only on TeleMetrum
+#
+TM_SKY_DRIVER_SRC = \
+	ao_gps_skytraq.c
+
 #
 # Tasks run on TeleMetrum
 #
@@ -108,6 +118,14 @@ TM_SRC = \
 	$(TM_TASK_SRC) \
 	$(TM_MAIN_SRC)
 
+TM_SIRF_SRC = \
+	$(TM_SRC) \
+	$(TM_SIRF_DRIVER_SRC)
+
+TM_SKY_SRC = \
+	$(TM_SRC) \
+	$(TM_SKY_DRIVER_SRC)
+
 TI_MAIN_SRC = \
 	ao_tidongle.c
 
@@ -161,13 +179,16 @@ SRC = \
 	$(TELE_COMMON_SRC) \
 	$(TELE_FAKE_SRC) \
 	$(TM_DRIVER_SRC) \
+	$(TM_SIRF_DRIVER_SRC) \
+	$(TM_SKY_DRIVER_SRC) \
 	$(TM_TASK_SRC) \
 	$(TM_MAIN_SRC) \
 	$(TI_MAIN_SRC) \
 	$(TD_MAIN_SRC) \
 	$(TT_MAIN_SRC)
 
-TM_REL=$(TM_SRC:.c=.rel) ao_product-telemetrum.rel
+TM_SIRF_REL=$(TM_SIRF_SRC:.c=.rel) ao_product-telemetrum.rel
+TM_SKY_REL=$(TM_SKY_SRC:.c=.rel) ao_product-telemetrum.rel
 TI_REL=$(TI_SRC:.c=.rel) ao_product-tidongle.rel
 TT_REL=$(TT_SRC:.c=.rel) ao_product-teleterra.rel
 TD_REL=$(TD_SRC:.c=.rel) ao_product-teledongle.rel
@@ -186,7 +207,7 @@ LST=$(REL:.rel=.lst)
 RST=$(REL:.rel=.rst)
 SYM=$(REL:.rel=.sym)
 
-PROGS=	telemetrum.ihx tidongle.ihx \
+PROGS=	telemetrum-sirf.ihx telemetrum-sky.ihx tidongle.ihx \
 	teleterra.ihx teledongle.ihx
 
 HOST_PROGS=ao_flight_test ao_gps_test ao_gps_test_skytraq
@@ -202,15 +223,21 @@ PAOM=$(PROGS:.ihx=)
 
 all: $(PROGS) $(HOST_PROGS)
 
-telemetrum.ihx: $(TM_REL) Makefile
-	$(CC) $(LDFLAGS) $(CFLAGS) -o $@ $(TM_REL)
-	sh check-stack ao.h telemetrum.mem
+telemetrum-sirf.ihx: $(TM_SIRF_REL) Makefile
+	$(CC) $(LDFLAGS) $(CFLAGS) -o $@ $(TM_SIRF_REL)
+	sh check-stack ao.h telemetrum-sirf.mem
+
+telemetrum-sky.ihx: $(TM_SKY_REL) Makefile
+	$(CC) $(LDFLAGS) $(CFLAGS) -o $@ $(TM_SKY_REL)
+	sh check-stack ao.h telemetrum-sky.mem
+
+telemetrum-sky.ihx: telemetrum-sirf.ihx
 
 tidongle.ihx: $(TI_REL) Makefile
 	$(CC) $(LDFLAGS) $(CFLAGS) -o $@ $(TI_REL)
 	sh check-stack ao.h tidongle.mem
 
-tidongle.ihx: telemetrum.ihx
+tidongle.ihx: telemetrum-sky.ihx
 
 teleterra.ihx: $(TT_REL) Makefile
 	$(CC) $(LDFLAGS) $(CFLAGS) -o $@ $(TT_REL)
diff --git a/src/ao_teleterra.c b/src/ao_teleterra.c
index deb63597..d696b914 100644
--- a/src/ao_teleterra.c
+++ b/src/ao_teleterra.c
@@ -31,7 +31,6 @@ main(void)
 	ao_cmd_init();
 	ao_usb_init();
 	ao_serial_init();
-	ao_gps_init();
 	ao_monitor_init(AO_LED_GREEN, TRUE);
 	ao_radio_init();
 	ao_config_init();
diff --git a/src/skytraq-cksum b/src/skytraq-cksum
new file mode 100644
index 00000000..e4960bff
--- /dev/null
+++ b/src/skytraq-cksum
@@ -0,0 +1,44 @@
+#!/usr/bin/env nickle
+
+int checksum(int[] msg)
+{
+	int sum = 0;
+	for (int i = 0; i < dim(msg); i++) {
+		sum ^= msg[i];
+		sum &= 0xff;
+	}
+	return sum;
+}
+
+void main()
+{
+	string[...]	input;
+	int[...]	msg;
+
+	setdim(input, 0);
+	while (!File::end(stdin)) {
+		input[dim(input)] = gets();
+	}
+
+	setdim(msg, 0);
+	for (int i = 0; i < dim(input); i++) {
+		string[*] words = String::wordsplit(input[i], " ,\t");
+		for (int j = 0; j < dim(words); j++) {
+			if (words[j] == "/" + "*")
+				break;
+			if (String::length(words[j]) > 0 &&
+			    Ctype::isdigit(words[j][0])) {
+				msg[dim(msg)] = string_to_integer(words[j]);
+			}
+		 }
+	}
+	printf("\t0xa0, 0xa1, 0x02x, 0x%02x,\t\t/* length: %d bytes */\n",
+	       dim(msg) >> 8, dim(msg) & 0xff, dim(msg));
+	for (int i = 0; i < dim(input); i++)
+		printf("%s\n", input[i]);
+	int csum = checksum(msg);
+	printf ("\t0x%02x, 0x0d, 0x0a,\n",
+		csum);
+}
+
+main();
-- 
2.30.2