X-Git-Url: http://git.asbjorn.biz/?p=rapper.git;a=blobdiff_plain;f=tools%2Flpcrc%2Flpcrc.c;fp=tools%2Flpcrc%2Flpcrc.c;h=75f7880ff5982e47a0f618118a2ec6998e85577e;hp=0000000000000000000000000000000000000000;hb=174cf615316851c4c2bff127afc2ad54070066d1;hpb=0163b16211dc58d6619b923b370be8491fb984cb

diff --git a/tools/lpcrc/lpcrc.c b/tools/lpcrc/lpcrc.c
new file mode 100644
index 0000000..75f7880
--- /dev/null
+++ b/tools/lpcrc/lpcrc.c
@@ -0,0 +1,87 @@
+/*
+ * Software License Agreement (BSD License)
+ *
+ * Copyright (c) 2010, Roel Verdult
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holders nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <assert.h>
+
+#define BLOCK_COUNT 7
+#define BLOCK_LENGTH 4
+#define BLOCK_TOTAL (BLOCK_COUNT*BLOCK_LENGTH)
+
+typedef unsigned char byte_t;
+
+int main(int argc, char *argv[])
+{
+	FILE* pf;
+	byte_t buf[BLOCK_TOTAL];
+	uint32_t crc = 0;
+	uint32_t block;
+	uint32_t cur_crc = 0;
+
+	// Check for required arguments
+	if (argc < 2)
+	{
+		printf("syntax: lpcrc <firmware.bin>\n");
+		return 1;
+	}
+
+	// Try to open the supplied firmware
+	if ((pf = fopen(argv[1],"rb")) == NULL)
+	{
+		printf("error: could not open file [%s]\n", argv[1]);
+		return 1;
+	}
+
+	// Read out the data blocks used for crc calculation
+	if (fread(buf,1,BLOCK_TOTAL,pf) != BLOCK_TOTAL)
+	{
+		printf("error: could not read required bytes\n");
+		fclose(pf);
+		return 1;
+	}
+
+	// Compute the crc value
+	for (block=0; block<BLOCK_COUNT; block++)
+	{
+		crc += *((uint32_t*)(buf+(block*BLOCK_LENGTH)));
+	}
+	crc = (~crc) + 1;
+
+	assert(fread(&cur_crc,1,BLOCK_LENGTH,pf) == BLOCK_LENGTH);
+	fclose(pf);
+
+	printf("cur_crc: %08x\n", cur_crc);
+	printf("new_crc: %08x\n", crc);
+	if (cur_crc != crc)
+		printf("CRC differs\n");
+
+	return 0;
+}