add rs232 support

This include an example to open /dev/ttyACM0 to receive data from
u-blox GPS and one to configure it in TIMEPULSE2 mode.

1 files changed, 92 insertions, 0 deletions

diff --git a/examples/rs232-read.c b/examples/rs232-read.c
new file mode 100644
index 0000000..8aeb6f8
--- /dev/null
+++ b/examples/rs232-read.c
@@ -0,0 +1,92 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <osmocom/core/select.h>
+#include <osmocom/core/talloc.h>
+#include <osmocom/core/msgb.h>
+#include <osmocom/core/logging.h>
+#include <osmocom/core/application.h>
+
+#include <osmocom/netif/rs232.h>
+
+#define DRS232TEST 0
+
+struct log_info_cat osmo_rs232_test_cat[] = {
+	[DRS232TEST] = {
+		.name = "DRS232TEST",
+		.description = "rs232 test",
+		.color = "\033[1;35m",
+		.enabled = 1, .loglevel = LOGL_DEBUG,
+	},
+};
+
+const struct log_info osmo_rs232_test_log_info = {
+	.filter_fn = NULL,
+	.cat = osmo_rs232_test_cat,
+	.num_cat = ARRAY_SIZE(osmo_rs232_test_cat),
+};
+
+static struct osmo_rs232 *r;
+
+void sighandler(int foo)
+{
+	LOGP(DRS232TEST, LOGL_NOTICE, "closing rs232.\n");
+	osmo_rs232_close(r);
+	osmo_rs232_destroy(r);
+	exit(EXIT_SUCCESS);
+}
+
+static int read_cb(struct osmo_rs232 *r)
+{
+	struct msgb *msg;
+
+	LOGP(DRS232TEST, LOGL_DEBUG, "received data from rs232\n");
+
+	msg = msgb_alloc(1024, "rs232/test");
+	if (msg == NULL) {
+		LOGP(DRS232TEST, LOGL_ERROR, "cannot allocate message\n");
+		return 0;
+	}
+	if (osmo_rs232_read(r, msg) < 0) {
+		LOGP(DRS232TEST, LOGL_ERROR, "cannot read from rs232\n");
+		return 0;
+	}
+	LOGP(DRS232TEST, LOGL_DEBUG, "received %d bytes\n", msg->len);
+
+	printf("%s", msg->data);
+
+	msgb_free(msg);
+	return 0;
+}
+
+static void *tall_test;
+
+int main(void)
+{
+	tall_test = talloc_named_const(NULL, 1, "osmo_rs232_test");
+
+	osmo_init_logging(&osmo_rs232_test_log_info);
+	log_set_log_level(osmo_stderr_target, LOGL_NOTICE);
+
+	r = osmo_rs232_create(tall_test);
+	if (r == NULL) {
+		LOGP(DRS232TEST, LOGL_ERROR, "cannot create rs232 object\n");
+		exit(EXIT_FAILURE);
+	}
+	osmo_rs232_set_serial_port(r, "/dev/ttyACM0");
+	osmo_rs232_set_baudrate(r, 9600);
+	osmo_rs232_set_read_cb(r, read_cb);
+
+	if (osmo_rs232_open(r) < 0) {
+		LOGP(DRS232TEST, LOGL_ERROR, "cannot open rs232\n");
+		exit(EXIT_FAILURE);
+	}
+
+	LOGP(DRS232TEST, LOGL_NOTICE, "Entering main loop\n");
+
+	while(1) {
+		osmo_select_main(0);
+	}
+}