1 files changed, 42 insertions, 0 deletions
diff --git a/src/clear_rts.c b/src/clear_rts.c
new file mode 100644
index 0000000..52da3f5
--- /dev/null
+++ b/src/clear_rts.c
@@ -0,0 +1,42 @@
+/* Compile with:
+	gcc -o toggle_rts toggle_rts.c
+
+	Change PORT if necessary.
+ */
+#define PORT "/dev/ttyS0"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <termios.h>
+#include <errno.h>
+#include <sys/ioctl.h>
+#include <linux/serial.h>
+
+int main() {
+	int fd, status;
+
+	fd = open(PORT, O_RDWR);
+	if(fd < 0) {
+		perror(PORT);
+		return 1;
+	}
+
+	// fprintf(stderr, "ioctl(fd, TIOCMGET, &status);\n");
+	ioctl(fd, TIOCMGET, &status);
+	/*
+	if(status & TIOCM_RTS) {
+		fprintf(stderr, "RTS set\n");
+	} else {
+		fprintf(stderr, "RTS clear\n");
+	}
+	*/
+	status &= ~TIOCM_RTS;
+	ioctl(fd, TIOCMSET, &status);
+	// fprintf(stderr, "ioctl(fd, TIOCMSET, &status);\n");
+	fprintf(stderr, "RTS forced off (Tucker SIO2PC)\n");
+	return 0;
+}