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authorJonathan McCrohan <jmccrohan@gmail.com>2011-10-12 21:50:48 +0100
committerJonathan McCrohan <jmccrohan@gmail.com>2011-10-12 21:50:48 +0100
commit6cfbf2dee130cc36a72d57adea0e9c04bb31f620 (patch)
tree638bcaf4c63e3d3be17e0f5e7d74639394d15702 /tests/bandwidth-server-one.c
downloadverteco-6cfbf2dee130cc36a72d57adea0e9c04bb31f620.tar.gz
Initial commit
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1 files changed, 93 insertions, 0 deletions
diff --git a/tests/bandwidth-server-one.c b/tests/bandwidth-server-one.c
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+/*
+ * Copyright © 2008-2010 Stéphane Raimbault <stephane.raimbault@gmail.com>
+ *
+ * This program 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
+ * (at your option) any later version.
+ *
+ * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include <modbus.h>
+
+enum {
+ TCP,
+ RTU
+};
+
+int main(int argc, char *argv[])
+{
+ int socket;
+ modbus_t *ctx;
+ modbus_mapping_t *mb_mapping;
+ int rc;
+ int use_backend;
+
+ /* TCP */
+ if (argc > 1) {
+ if (strcmp(argv[1], "tcp") == 0) {
+ use_backend = TCP;
+ } else if (strcmp(argv[1], "rtu") == 0) {
+ use_backend = RTU;
+ } else {
+ printf("Usage:\n %s [tcp|rtu] - Modbus client to measure data bandwith\n\n", argv[0]);
+ exit(1);
+ }
+ } else {
+ /* By default */
+ use_backend = TCP;
+ }
+
+ if (use_backend == TCP) {
+ ctx = modbus_new_tcp("127.0.0.1", 1502);
+ socket = modbus_tcp_listen(ctx, 1);
+ modbus_tcp_accept(ctx, &socket);
+
+ } else {
+ ctx = modbus_new_rtu("/dev/ttyUSB0", 115200, 'N', 8, 1);
+ modbus_set_slave(ctx, 1);
+ modbus_connect(ctx);
+ }
+
+ mb_mapping = modbus_mapping_new(MODBUS_MAX_READ_BITS, 0,
+ MODBUS_MAX_READ_REGISTERS, 0);
+ if (mb_mapping == NULL) {
+ fprintf(stderr, "Failed to allocate the mapping: %s\n",
+ modbus_strerror(errno));
+ modbus_free(ctx);
+ return -1;
+ }
+
+ for(;;) {
+ uint8_t query[MODBUS_TCP_MAX_ADU_LENGTH];
+
+ rc = modbus_receive(ctx, query);
+ if (rc >= 0) {
+ modbus_reply(ctx, query, rc, mb_mapping);
+ } else {
+ /* Connection closed by the client or server */
+ break;
+ }
+ }
+
+ printf("Quit the loop: %s\n", modbus_strerror(errno));
+
+ modbus_mapping_free(mb_mapping);
+ close(socket);
+ modbus_free(ctx);
+
+ return 0;
+}