From 022f83ca6fd589005d8eb3e25e633950fef69fa7 Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@keithp.com>
Date: Fri, 17 Apr 2009 23:38:14 -0700
Subject: Add gps, debug dongle support and pressure alt tables

GPS also pulled in serial support. The altitude tables take raw 11-bit
pressure sample numbers and convert them to standard pressure altitude
values.

Signed-off-by: Keith Packard <keithp@keithp.com>
---
 gps-cksum | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100755 gps-cksum

(limited to 'gps-cksum')

diff --git a/gps-cksum b/gps-cksum
new file mode 100755
index 00000000..a08153bf
--- /dev/null
+++ b/gps-cksum
@@ -0,0 +1,17 @@
+#!/usr/bin/env nickle
+
+int checksum(string a)
+{
+	int	c = 0;
+	for (int i = 0; i < String::length(a); i++)
+		c ^= a[i];
+	return c;
+}
+
+void main()
+{
+	for (int i = 1; i < dim(argv); i++)
+		printf ("$%s*%02x\n", argv[i], checksum(argv[i]));
+}
+
+main();
-- 
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