diff --git a/Ubiquitous/Nuttx_Fusion_XiUOS/aiit_board/xidatong/src/ch438_demo.c b/Ubiquitous/Nuttx_Fusion_XiUOS/aiit_board/xidatong/src/ch438_demo.c
index a90ee6da2..a5f02baf6 100644
--- a/Ubiquitous/Nuttx_Fusion_XiUOS/aiit_board/xidatong/src/ch438_demo.c
+++ b/Ubiquitous/Nuttx_Fusion_XiUOS/aiit_board/xidatong/src/ch438_demo.c
@@ -22,29 +22,66 @@
  * Included Files
  ****************************************************************************/
 #include "imxrt_ch438.h"
+#include <sys/ioctl.h>
+#include <nuttx/ioexpander/gpio.h>
 
 void CH438Demo(void)
 {
-    int fd;
+    int fd,m0fd,m1fd;
     int i;
+    char sendbuffer1[4] = {0xC0,0x04,0x01,0x09};
+    char sendbuffer2[6] = {0xC0,0x00,0x03,0x12,0x34,0x61};
+    char sendbuffer3[3] = {0xC1,0x04,0x01};
+    char sendbuffer4[3] = {0xC1,0x00,0x03};
     char buffer[256];
     int readlen;
 
-    while(1)
+    // while(1)
+    // {
+    fd = open("/dev/extuart_dev3", O_RDWR);
+    m0fd = open("/dev/gpout0", O_RDWR);
+    m1fd = open("/dev/gpout1", O_RDWR);
+    ioctl(m0fd, GPIOC_WRITE, (unsigned long)1);
+    ioctl(m1fd, GPIOC_WRITE, (unsigned long)1);
+    sleep(1);
+
+    write(fd, sendbuffer1,4);
+    sleep(1);
+    readlen = read(fd, buffer, 256);
+    printf("readlen1 = %d\n", readlen);
+    for(i = 0;i< readlen; ++i)
     {
-        fd = open("/dev/extuart_dev2", O_RDWR);
-        write(fd, "AT+ADDR=?",9);
-        sleep(1);
-        readlen = read(fd, buffer, 256);
-
-        printf("readlen1 = %d\n", readlen);
-
-        for(i = 0;i< readlen; ++i)
-        {
-            printf("%c(0x%x)\n", buffer[i], buffer[i]);
-        }
-
-        close(fd);
+        printf("0x%x\n", buffer[i]);
     }
+
+    write(fd, sendbuffer2,6);
+    sleep(1);
+    readlen = read(fd, buffer, 256);
+    printf("readlen1 = %d\n", readlen);
+    for(i = 0;i< readlen; ++i)
+    {
+        printf("0x%x\n", buffer[i]);
+    }
+
+    write(fd, sendbuffer3,3);
+    sleep(1);
+    readlen = read(fd, buffer, 256);
+    printf("readlen1 = %d\n", readlen);
+    for(i = 0;i< readlen; ++i)
+    {
+        printf("0x%x\n", buffer[i]);
+    }
+
+    write(fd, sendbuffer4,3);
+    sleep(1);
+    readlen = read(fd, buffer, 256);
+    printf("readlen1 = %d\n", readlen);
+    for(i = 0;i< readlen; ++i)
+    {
+        printf("0x%x\n", buffer[i]);
+    }
+
+    close(fd);
+    // }
     
 }
diff --git a/Ubiquitous/Nuttx_Fusion_XiUOS/aiit_board/xidatong/src/imxrt_ch438.c b/Ubiquitous/Nuttx_Fusion_XiUOS/aiit_board/xidatong/src/imxrt_ch438.c
index d38566437..c859645f9 100644
--- a/Ubiquitous/Nuttx_Fusion_XiUOS/aiit_board/xidatong/src/imxrt_ch438.c
+++ b/Ubiquitous/Nuttx_Fusion_XiUOS/aiit_board/xidatong/src/imxrt_ch438.c
@@ -55,8 +55,29 @@ struct ch438_dev_s
  * Private Data
  ****************************************************************************/
 
-static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
-static pthread_cond_t  cond = PTHREAD_COND_INITIALIZER;
+static pthread_mutex_t mutex[CH438PORTNUM] = 
+{
+	PTHREAD_MUTEX_INITIALIZER,
+	PTHREAD_MUTEX_INITIALIZER,
+	PTHREAD_MUTEX_INITIALIZER,
+	PTHREAD_MUTEX_INITIALIZER,
+	PTHREAD_MUTEX_INITIALIZER,
+	PTHREAD_MUTEX_INITIALIZER,
+	PTHREAD_MUTEX_INITIALIZER,
+	PTHREAD_MUTEX_INITIALIZER
+};
+static pthread_cond_t cond[CH438PORTNUM] = 
+{
+	PTHREAD_COND_INITIALIZER,
+	PTHREAD_COND_INITIALIZER,
+	PTHREAD_COND_INITIALIZER,
+	PTHREAD_COND_INITIALIZER,
+	PTHREAD_COND_INITIALIZER,
+	PTHREAD_COND_INITIALIZER,
+	PTHREAD_COND_INITIALIZER,
+	PTHREAD_COND_INITIALIZER
+};
+
 volatile int done[CH438PORTNUM] = {0};
 
 static	char buff[CH438PORTNUM][BUFFERSIZE];
@@ -90,11 +111,11 @@ int getInterruptStatus(int argc, char **argv)
 	uint8_t ext_uart_no = 0;
 	while(1)
 	{
-		pthread_mutex_lock(&mutex);
+		pthread_mutex_lock(&mutex[ext_uart_no]);
 		gInterruptStatus = ReadCH438Data(REG_SSR_ADDR);
 		if(!gInterruptStatus)
 		{
-			pthread_mutex_unlock(&mutex);
+			pthread_mutex_unlock(&mutex[ext_uart_no]);
 			continue;
 		}
 
@@ -103,8 +124,8 @@ int getInterruptStatus(int argc, char **argv)
 			if(gInterruptStatus & Interruptnum[ext_uart_no])
 			{
 				done[ext_uart_no] = 1;
-				pthread_cond_signal(&cond);
-				pthread_mutex_unlock(&mutex);
+				pthread_cond_signal(&cond[ext_uart_no]);
+				pthread_mutex_unlock(&mutex[ext_uart_no]);
 			}
 		}
 	}
@@ -412,9 +433,9 @@ static size_t ImxrtCh438ReadData(uint8_t ext_uart_no)
 	uint8_t	REG_LSR_ADDR;
 	uint8_t	REG_MSR_ADDR;
 
-	pthread_mutex_lock(&mutex);
+	pthread_mutex_lock(&mutex[ext_uart_no]);
 	while(done[ext_uart_no] == 0)
-		pthread_cond_wait(&cond, &mutex);
+		pthread_cond_wait(&cond[ext_uart_no], &mutex[ext_uart_no]);
 	if (done[ext_uart_no] == 1)
 	{
 		REG_IIR_ADDR = offsetadd[ext_uart_no] | REG_IIR0_ADDR;
@@ -445,7 +466,7 @@ static size_t ImxrtCh438ReadData(uint8_t ext_uart_no)
 				break;
 		}
 	}
-	pthread_mutex_unlock(&mutex);
+	pthread_mutex_unlock(&mutex[ext_uart_no]);
 
 	return RevLen;
 }
@@ -460,22 +481,27 @@ static size_t ImxrtCh438ReadData(uint8_t ext_uart_no)
 void Ch438InitDefault(void)
 {
 	
-	int ret;
+	int ret, i;
 
 	/* Initialize the mutex */
 
-	ret = pthread_mutex_init(&mutex, NULL);
-	if (ret != 0)
+	for(i = 0; i < CH438PORTNUM; i++)
 	{
-		ch438err("pthread_mutex_init failed, status=%d\n", ret);
+		ret = pthread_mutex_init(&mutex[i], NULL);
+		if (ret != 0)
+		{
+			ch438err("pthread_mutex_init failed, status=%d\n", ret);
+		}
 	}
 
 	/* Initialize the condition variable */
-
-	ret = pthread_cond_init(&cond, NULL);
-	if (ret != 0)
+	for(i = 0; i < CH438PORTNUM; i++)
 	{
-		ch438err("pthread_cond_init failed, status=%d\n", ret);
+		ret = pthread_cond_init(&cond[i], NULL);
+		if (ret != 0)
+		{
+			ch438err("pthread_cond_init failed, status=%d\n", ret);
+		}
 	}
 
 	ret = task_create("ch438_task", 60, 8192, getInterruptStatus, NULL);