--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cp2102/decode_baudtab.c	Mon Sep 11 20:33:26 2023 +0000
@@ -0,0 +1,45 @@
+/*
+ * The function implemented in this module decodes the baud rate table
+ * contained in the captured CP2102 EEPROM image.
+ */
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "cp210x_defs.h"
+
+extern u_char eeprom[SIZE_EEPROM];
+
+void
+decode_baud_table(outf)
+	FILE *outf;
+{
+	unsigned entry;
+	u_char *dp;
+	unsigned baudrate, baudgen, timegen, prescaler, sparebyte;
+	unsigned baud_div, calc_baud, time_us;
+
+	dp = eeprom;
+	for (entry = 0; entry < SIZE_BAUDRATES; entry++) {
+		baudgen = (dp[0] << 8) | dp[1];
+		timegen = (dp[2] << 8) | dp[3];
+		prescaler = dp[4];
+		sparebyte = dp[5];
+		baudrate = dp[6] | (dp[7] << 8) | (dp[8] << 16) | (dp[9] << 24);
+		fprintf(outf, "baud-entry %2u: %7u = %04X, %04X, %u, %u",
+			entry, baudrate, baudgen, timegen, prescaler,
+			sparebyte);
+		if (prescaler) {
+			baud_div = (0x10000 - baudgen) * prescaler;
+			calc_baud = 24000000 / baud_div;
+			fprintf(outf, "\t# %u baud, ", calc_baud);
+			time_us = (0x10000 - timegen) * 2;
+			if (time_us >= 1000)
+				fprintf(outf, "%u.%03u ms", time_us / 1000,
+					time_us % 1000);
+			else
+				fprintf(outf, "%u us", time_us);
+		}
+		putc('\n', outf);
+	}
+}