added first version of serial flashing via bootloader (incomplete)

src/fnflash.c

@@ -0,0 +1,106 @@
+/**
+ * fnordlicht flash utility
+ *
+ * flash your fnordlichts via rs232 and the bootloader
+ *
+ * @copyright	2013 Steffen Vogel
+ * @license	http://www.gnu.org/licenses/gpl.txt GNU Public License
+ * @author	Steffen Vogel <post@steffenvogel.de>
+ * @link	http://www.steffenvogel.de
+ */
+/*
+ * This file is part of libfn
+ *
+ * libfn is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * any later version.
+ *
+ * libfn is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with libfn. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "libfn.h"
+
+#define MAX_SIZE (0x2000 - 0x400) /* 8kB - 512 words for bootloader (ATmega8) */
+
+
+
+void usage() {
+	fprintf(stderr, "usage: fnflash SERIAL-PORT FIRMWARE [ADDRESS]\n");
+}
+
+int main(int argc, char *argv[]) {
+	int fn_fd, fw_fd;
+	size_t fw_size;
+	struct remote_msg_t fn_msg;
+
+	if (argc < 3 || argc > 4) {
+		usage();
+		return EXIT_FAILURE;
+	}
+
+	fn_msg.addr = (argc == 4) ? atoi(argv[3]) : REMOTE_ADDR_BROADCAST;
+
+	/* connect fnordlichts */
+	fn_fd = open(argv[1], O_RDWR | O_NOCTTY);
+	if (fn_fd < 0) {
+		perror(argv[0]);
+		return EXIT_FAILURE;
+	}
+
+	fn_init(fn_fd);
+	fn_sync(fn_fd);
+
+	/* open firmware file */
+	fw_fd = open(argv[2], O_RDONLY);
+	if (fw_fd < 0) {
+		perror(argv[0]);
+		return EXIT_FAILURE;
+	}
+
+	/* check length */
+	fw_size = lseek(fw_fd, 0, SEEK_END);
+	if (fw_size < 0 || fw_size > MAX_SIZE) {
+		fprintf(stderr, "Invalid firmware file size!\n");
+		return EXIT_FAILURE;
+	}
+
+	/* enter bootloader */
+	msg.cmd = REMOTE_CMD_PULL_INT;
+	msg.pull_int.delay = 10;
+	fn_send(fn_fd, &msg);
+
+	msg.cmd = REMOTE_CMD_BOOTLOADER;
+	msg.bootloader.magic[0] = BOOTLOADER_MAGIC_BYTE1;
+	msg.bootloader.magic[1] = BOOTLOADER_MAGIC_BYTE2;
+	msg.bootloader.magic[2] = BOOTLOADER_MAGIC_BYTE3;
+	msg.bootloader.magic[3] = BOOTLOADER_MAGIC_BYTE4;
+	fn_send(fn_fd, &msg);
+
+	/* start flashing */
+	while () {
+
+		/* get chunk */
+		lseek(fw_fd, 0, SEEK_SET);
+
+		/* calc crc16 */
+
+		/* transfer */
+
+		/* flash */
+	
+	}
+
+	/* start verifying */
+
+	return 0;
+}