From 9513be7f9d3d0b0ec29f6487fa9dc8f1ac24d0de Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@keithp.com>
Date: Thu, 25 Aug 2011 20:43:44 -0700
Subject: altos: Restructure altos build to prepare for multi-arch support

Split out sources into separate directories:

	core:		architecture and product independent bits
	cc1111:		cc1111-specific code
	drivers:	architecture independent drivers
	product:	product-specific sources and Makefile fragments
	util:		scripts for building stuff

This should have no effect on the built products, but testing is encouraged

Signed-off-by: Keith Packard <keithp@keithp.com>
---
 src/util/skytraq-cksum | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 src/util/skytraq-cksum

(limited to 'src/util/skytraq-cksum')

diff --git a/src/util/skytraq-cksum b/src/util/skytraq-cksum
new file mode 100644
index 00000000..ab0464a7
--- /dev/null
+++ b/src/util/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, 0x%02x, 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();
-- 
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