From 1e563e2b731d928942f43e1341c8c50b0faf1c01 Mon Sep 17 00:00:00 2001
From: guowenxue <guowenxue@gmail.com>
Date: Fri, 31 May 2024 11:39:31 +0800
Subject: [PATCH] APPS:IGKBoard-IMX6ULL: Add test-apps source code:
---
drivers/test-apps/ttyS_test.c | 106 +++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 106 insertions(+), 0 deletions(-)
diff --git a/drivers/test-apps/ttyS_test.c b/drivers/test-apps/ttyS_test.c
new file mode 100644
index 0000000..80ee223
--- /dev/null
+++ b/drivers/test-apps/ttyS_test.c
@@ -0,0 +1,106 @@
+/*********************************************************************************
+ * Copyright: (C) 2024 LingYun IoT System Studio
+ * All rights reserved.
+ *
+ * Filename: ttyS_test.c
+ * Description: This file is comport loop back test program
+ *
+ * Version: 1.0.0(05/24/2024)
+ * Author: Guo Wenxue <guowenxue@gmail.com>
+ * ChangeLog: 1, Release initial version on "05/24/2024 07:38:43 PM"
+ *
+ ********************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <termios.h>
+#include <pthread.h>
+
+#define DEV_NAME "/dev/ttymxc1"
+#define MSG "Hello, LingYun IoT System Studio!"
+
+int main(int argc, char **argv)
+{
+ struct termios tty;
+ int serial_fd;
+ int bytes;
+ char read_buf[64];
+
+ /*+-------------------------+
+ | Open Serial Port |
+ +-------------------------+*/
+ serial_fd = open(DEV_NAME, O_RDWR );
+ if (serial_fd == -1)
+ {
+ printf("Open '%s' failed: %s\n", DEV_NAME, strerror(errno));
+ return 0;
+ }
+
+ /*+-------------------------+
+ | Configure Serial Port |
+ +-------------------------+*/
+
+ tcgetattr(serial_fd, &tty);// read current serial port settings
+
+ tty.c_cflag &= ~PARENB; // Clear parity bit, disabling parity (most common)
+ tty.c_cflag &= ~CSTOPB; // Clear stop field, only one stop bit used in communication (most common)
+ tty.c_cflag &= ~CSIZE; // Clear all bits that set the data size
+ tty.c_cflag |= CS8; // 8 bits per byte (most common)
+ tty.c_cflag &= ~CRTSCTS; // Disable RTS/CTS hardware flow control (most common)
+ tty.c_cflag |= CREAD | CLOCAL; // Turn on READ & ignore ctrl lines (CLOCAL = 1)
+
+ tty.c_lflag &= ~ICANON;
+ tty.c_lflag &= ~ECHO; // Disable echo
+ tty.c_lflag &= ~ECHOE; // Disable erasure
+ tty.c_lflag &= ~ECHONL; // Disable new-line echo
+ tty.c_lflag &= ~ISIG; // Disable interpretation of INTR, QUIT and SUSP
+ tty.c_iflag &= ~(IXON | IXOFF | IXANY); // Turn off s/w flow ctrl
+ tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP|INLCR|IGNCR|ICRNL); // Disable any special handling of received bytes
+
+ tty.c_oflag &= ~OPOST; // Prevent special interpretation of output bytes (e.g. newline chars)
+ tty.c_oflag &= ~ONLCR; // Prevent conversion of newline to carriage return/line feed
+
+ tty.c_cc[VTIME] = 10; // Wait for up to 1s (10 deciseconds), returning as soon as any data is received.
+ tty.c_cc[VMIN] = 0;
+
+ /* Set in/out baud rate to be 115200 */
+ cfsetispeed(&tty, B115200);
+ cfsetospeed(&tty, B115200);
+
+ tcsetattr(serial_fd, TCSANOW, &tty);
+
+ /*+-------------------------+
+ | Write to Serial Port |
+ +-------------------------+*/
+ write(serial_fd, MSG, strlen(MSG));
+ printf("Send MSG : %s\n", MSG);
+
+ /*+-------------------------+
+ | Read from Serial Port |
+ +-------------------------+*/
+ /*
+ * The behaviour of read() (e.g. does it block?, how long does it block for?)
+ * depends on the configuration settings above, specifically VMIN and VTIME
+ */
+ memset(&read_buf, '\0', sizeof(read_buf));
+ bytes = read(serial_fd, &read_buf, sizeof(read_buf));
+ if (bytes< 0)
+ {
+ printf("Error reading: %s", strerror(errno));
+ goto cleanup;
+ }
+
+ printf("Received MSG: %s\n", read_buf);
+
+ /*+-------------------------+
+ | close Serial Port |
+ +-------------------------+*/
+
+cleanup:
+ close(serial_fd);
+ return 0; // success
+}
--
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