diff --git a/src/jlinux_uart.cpp b/src/jlinux_uart.cpp
new file mode 100644
index 0000000..6050236
--- /dev/null
+++ b/src/jlinux_uart.cpp
@@ -0,0 +1,313 @@
+/***********************************************************************
+ * @file jctrl_uart.cpp
+     JCTRL_UART
+ * @brief   header file
+ * @history
+ * Date       Version Author    description
+ * ========== ======= ========= =======================================
+ * 2022-07-21 V1.0    Lucky,lukai@jovision.com   Create
+ *
+ * @Copyright (C)  2022  Jovision Technology Co., Ltd.
+***********************************************************************/
+#include <termios.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <linux/stat.h>
+#include <sys/prctl.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <linux/serial.h>
+#include "jlinux_uart.h"
+
+struct _uart_ctx{
+    int fd;
+};
+
+int _get_baudrate(int nBaud)
+{
+    switch(nBaud)
+    {
+    case 1200:
+        return B1200;	//注：B1200为系统定义
+    case 2400:
+        return B2400;
+    case 4800:
+        return B4800;
+    case 9600:
+        return B9600;
+ 	case 19200 :
+        return B19200;
+	case 38400:
+	     return B38400;
+	case 57600:
+	     return B57600;
+	case 115200:
+	     return B115200;
+    default:
+        return B2400;
+    }
+}
+
+
+juart_hdl_t juart_open(const char *name){
+    juart_hdl_t uart = new _uart_ctx;
+    uart->fd = open(name, O_RDWR | O_NONBLOCK | O_NOCTTY |  O_EXCL|O_SYNC);
+    return uart;
+}
+int juart_close(juart_hdl_t uart){
+    if(uart->fd>0)
+		close(uart->fd);
+	uart->fd = 0;
+    return 0;
+}
+int juart_get_fd(juart_hdl_t uart){
+    return uart->fd;
+}
+int juart_set_attr(juart_hdl_t uart, JUartAttr_t *attr){
+    if (uart->fd <= 0)
+    {
+        printf("jv_uart_recv_ex fd error\n");
+        return -1;
+    }
+    struct termios newtio, oldtio;
+    memset(&oldtio, 0, sizeof(oldtio));
+    /* save the old serial port configuration */
+    if (tcgetattr(uart->fd, &oldtio) != 0) {
+        perror("set_port/tcgetattr");
+        return -1;
+    }
+    memset(&newtio, 0, sizeof(newtio));
+    //设置波特率
+    int nBaud = _get_baudrate(attr->baudrate);
+    switch (nBaud)
+    {
+    case B300:
+    case B1200:
+    case B2400:
+    case B4800:
+    case B9600:
+    case B19200:
+    case B38400:
+    case B57600:
+    case B115200:
+        cfsetospeed(&newtio, nBaud);
+        cfsetispeed(&newtio, nBaud);
+        break;
+    default:
+        printf("jv_uart_set_attr:Unsupported baudrate!\n");
+        return -1;
+    }
+    /* ignore modem control lines and enable receiver */
+    newtio.c_cflag |= CLOCAL | CREAD;
+    newtio.c_cflag &= ~CSIZE;
+    /* set character size */
+    switch (attr->datawidth) {
+    case 5:
+        newtio.c_cflag |= CS5;
+        break;
+    case 6:
+        newtio.c_cflag |= CS6;
+        break;
+    case 7:
+        newtio.c_cflag |= CS7;
+        break;
+    case 8:
+    default:
+        newtio.c_cflag |= CS8;
+        break;
+    }
+    /* set the stop bits */
+    switch (attr->stopbit) {
+    default:
+    case 1:
+        newtio.c_cflag &= ~CSTOPB;
+        break;
+    case 2:
+        newtio.c_cflag |= CSTOPB;
+        break;
+    }
+    /* set the parity */
+    switch (attr->parity) {
+    case 'o':
+    case 'O':
+    case 1:
+        newtio.c_cflag |= PARENB;
+        newtio.c_cflag |= PARODD;
+        newtio.c_iflag |= INPCK;
+        break;
+    case 'e':
+    case 'E':
+    case 2:
+        newtio.c_cflag |= PARENB;
+        newtio.c_cflag &= ~PARODD;
+        newtio.c_iflag |= INPCK;
+        break;
+    case 'n':
+    case 'N':
+    case 0:
+    default:
+        newtio.c_cflag &= ~PARENB;
+        newtio.c_iflag &= ~INPCK;
+        break;
+    }
+    /* Raw input */
+    newtio.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
+    /* Software flow control is disabled */
+    newtio.c_iflag &= ~(IXON | IXOFF | IXANY);
+    /* Raw ouput */
+    newtio.c_oflag &=~ OPOST;
+    /* set timeout in deciseconds for non-canonical read */
+    newtio.c_cc[VTIME] = 0;
+    /* set minimum number of characters for non-canonical read */
+    newtio.c_cc[VMIN] = 0;
+    /* flushes data received but not read */
+    tcflush(uart->fd, TCIFLUSH);
+    /* set the parameters associated with the terminal from
+        the termios structure and the change occurs immediately */
+    if ((tcsetattr(uart->fd, TCSANOW, &newtio)) != 0) {
+        perror("set_port/tcsetattr");
+        return -1;
+    }
+    return 0;
+}
+int juart_send(juart_hdl_t uart, char *data, int len){
+    if (uart->fd > 0)
+    {
+        int ret = write(uart->fd, data, len);
+        if (ret == len)
+            return 0;
+    }
+    return -1;
+}
+int _modbus_rtu_select(juart_hdl_t uart, struct timeval *tv)
+{
+    fd_set rfds;
+    FD_ZERO(&rfds);
+    FD_SET(uart->fd, &rfds);
+    int s_rc;
+    while ((s_rc = select(uart->fd+1, &rfds, NULL, NULL, tv)) == -1) {
+        if (errno == EINTR) {
+            fprintf(stderr, "A non blocked signal was caught\n");
+            /* Necessary after an error */
+            FD_ZERO(&rfds);
+            FD_SET(uart->fd, &rfds);
+        } else {
+            return -1;
+        }
+    }
+    if (s_rc == 0) {
+        /* Timeout */
+        errno = ETIMEDOUT;
+        return -1;
+    }
+    return s_rc;
+}
+int juart_recv(juart_hdl_t uart, char *data, int len, int timeout){
+    if (uart->fd > 0)
+    {
+        struct timeval tv;
+        tv.tv_sec = 0;
+        tv.tv_usec = timeout*1000;
+        if(_modbus_rtu_select(uart, &tv) > 0){
+            return read(uart->fd, data, len);
+        }
+        return -1;
+    }else{
+        usleep(timeout*1000);
+    }
+    return -1;
+
+}
+
+
+/**
+ *@brief 接收串口数据扩展接口，从收到start开始接收，到收到stop返回
+ *@param handle 句柄
+ *@param data 接收数据缓存
+ *@param len 缓存大小
+ *@param start 数据头标志：前nstart个字节
+ *@param nstart 数据头字节数
+ *@param stop 数据截止标志：后nstop个字节
+ *@param nstop 数据截止标志的字节数
+ */
+extern "C" int juart_recv_ex(juart_hdl_t handle, char *data, int len, char *start, int nstart, char *stop, int nstop, int timeout);
+int juart_recv_ex(juart_hdl_t uart, char *data, int len, char *start, int nstart, char *stop, int nstop, int timeout){
+    if (uart->fd <= 0)
+    {
+        printf("jv_uart_recv_ex fd error\n");
+        return -1;
+    }
+    int offset = 0;
+    int offset_end = 0;
+    int bytes_read = 0;
+    while (1)
+    {
+        bytes_read = read(uart->fd, &data[offset], 1);
+        if (bytes_read == 1 && offset < nstart && data[offset] == start[offset])
+        {
+            offset++;
+        }
+        if (offset == nstart)
+            break;
+        if (bytes_read < 1)
+            usleep(0);
+    }
+    while (offset < len)
+    {
+        if (data[offset] == stop[offset_end])
+        {
+            offset_end++;
+        }
+        if (offset_end == nstop)
+            break;
+        bytes_read = read(uart->fd, &data[offset], 1);
+        if (bytes_read == 1)
+        {
+            offset++;
+        }
+        else
+        {
+            usleep(0);
+        }
+    }
+    return offset;
+}
+
+/**
+ *@brief 设置rs485模式
+ *@param handle 句柄
+ *@param mode 0:发送后立刻置为接收状态；非0：发送后保持发送状态
+ *@return 0 成功
+ */
+int juart_set_rs485(juart_hdl_t handle, int mode)
+{
+    struct serial_rs485 rs485;
+	if (ioctl(handle->fd, TIOCGRS485, &rs485) == -1)
+	{
+		printf("TIOCGRS485 ioctl error.\n");
+		return -1;
+	}
+	rs485.flags |= SER_RS485_ENABLED;
+	if (mode == 0)
+	{
+		rs485.flags &= ~SER_RS485_RTS_ON_SEND;
+		rs485.flags |= SER_RS485_RTS_AFTER_SEND;
+	}
+	else
+	{
+		rs485.flags |= SER_RS485_RTS_ON_SEND;
+		rs485.flags &= ~SER_RS485_RTS_AFTER_SEND;
+	}
+	rs485.delay_rts_before_send = 0;
+	rs485.delay_rts_after_send = 0;
+	if (ioctl(handle->fd, TIOCSRS485, &rs485) == -1)
+	{
+	    printf("TIOCSRS485 ioctrl error.\n");
+		return -1;
+	}
+	return 0;
+}
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