--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cp2102/write_eeprom.c	Thu Sep 28 02:38:59 2023 +0000
@@ -0,0 +1,30 @@
+/*
+ * This module implements the elementary function for writing the EEPROM
+ * on a CP2102 device.
+ */
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <usb.h>
+#include "cp210x_defs.h"
+
+extern u_char eeprom[SIZE_EEPROM];
+
+void
+write_eeprom(usbh)
+	usb_dev_handle *usbh;
+{
+	int rc;
+
+	rc = usb_control_msg(usbh, DEVICE_OUT_REQTYPE, CP210x_CONFIG,
+			     REG_EEPROM, 0, (char *) eeprom, SIZE_EEPROM,
+			     USB_WRITE_TIMEOUT);
+	if (rc != SIZE_EEPROM) {
+		fprintf(stderr,
+			"EEPROM write error: usb_control_msg() returned %d\n",
+			rc);
+		exit(1);
+	}
+}