still featuring, not done

.vscode/settings.json

 {
     "files.associations": {
         "egl_ctx.h": "c"
-    }
+    },
+    "C_Cpp.errorSquiggles": "disabled"
 }
\ No newline at end of file

raspberrypi_spi/LocalDimming/interface.c

@@ -118,7 +118,7 @@ uint16_t getAngle(char *rece)
 }
 
 // crc
-uint16_t CrcValueCalc(const uint8_t *cpucData, uint16_t usLength)
+uint16_t CrcValueCalc(uint8_t *cpucData, uint16_t usLength)
 {
 	uint16_t crcValue = 0xffff;
 	int i;
@@ -142,7 +142,137 @@ uint16_t CrcValueCalc(const uint8_t *cpucData, uint16_t usLength)
 
 extern int get_audio_device_id();
 
-void sentUart(char *buf, int fileuart)
+void sendMessageHead(int mode, char* message)  
+{
+    *(message) = 0x40;
+    *(message + 1) = 0x38;   // head 
+    if (mode == 0)   // read
+    {
+        *(message + 2) = 0x07;  //length
+        *(message + 3) = 0x03;   //instru
+        *(message + 4) = 0x00;   //reg0
+        *(message + 6) = 0x01;  //ack
+    }
+    else{             // write
+        *(message + 2) = 0x09;   //length
+        *(message + 3) = 0x06;    //instru
+        *(message + 4) = 0x00;    //reg0
+        *(message + 5) = 0x02;    //reg1 write angle
+        *(message + 8) = 0x00;   //ack
+    }
+}
+
+void sentMessageAngle(int fileuart, uint16_t angle)  //changed
+{
+    char messageAngle[11];
+    sendMessageHead(1, messageAngle);
+    messageAngle[6] = (angle >> 8) & 0xff;
+    messageAngle[7] = angle & 0xff;
+
+    uint16_t crc;
+    crc = CrcValueCalc(messageAngle, 9);
+    messageAngle[9] = (crc >> 8) & 0xff;
+    messageAngle[10] = crc & 0xff;
+
+    write(fileuart, messageAngle, 11);
+}
+
+char* readMessageAngle(int fileuart)
+{
+    char* result = malloc(sizeof(char));
+    return result;
+}
+char* readMessageStatus(int fileuart)
+{
+    char message[9];
+    sendMessageHead(0, message);
+    message[5] = 0x01;
+    
+    uint16_t crc;
+    crc = CrcValueCalc(message, 7);
+    message[7] = (crc >> 8) & 0xff;
+    message[8] = crc & 0xff;
+
+    int t = 0;
+    while (!t)
+    {
+        write(fileuart, message, 9);
+        int recbyte = serialDataAvail(fileuart);
+
+        while (1);
+    }
+
+    char* result = malloc(sizeof(char));
+    return result;
+}
+
+int judgeData()
+{
+    return 1;
+}
+
+void waitforReady(int fileuart)
+{
+    int t = 0;
+    while (!t)
+    {
+        int recbytenum = serialDataAvail(fileuart);
+        if (recbytenum > 1)
+        {
+            char buf[24] = {0};
+            int temp = 0;
+            while (recbytenum--)  //recbyte
+            {
+                buf[temp++] = serialGetchar(fileuart);
+            }
+            
+            if (!judgeData) //judge data if not right
+            {
+                usleep(500);
+                readMessageStatus(fileuart);
+                continue;
+            }
+            
+            // check receive data .....
+
+
+
+
+
+            serialFlush(fileuart);   //make status ready for next place
+            break;
+        }
+    }
+}
+
+void waitforReady_test(int fileuart)  //test_version
+{
+    while (1)
+    {
+        int recbytenum = serialDataAvail(fileuart);
+        if (recbytenum > 1)
+        {
+            char buf[24] = {0};
+            int temp = 0;
+            while (recbytenum--)
+            {
+                buf[temp++] = serialGetchar(fileuart);
+            }
+            for (int i = 0; i < temp; i++)
+            {
+                printf("%x", buf[i]);
+                if ( (i%2) == 0)
+                    printf(" ");
+            }
+            printf("\n");
+
+            serialFlush(fileuart);
+            break;
+        }
+    }
+}
+
+void sentUart(char *buf, int fileuart, int fileusb)    //changed
 {
 	if (count == 9)
 	{
@@ -150,21 +280,15 @@ void sentUart(char *buf, int fileuart)
 		uint16_t angle;
 		angle = getAngle(totalbuf);
 		printf("angle = %x\n", angle);
-		char angleret[2];
-		angleret[1] = angle & 0xff;
-		angleret[0] = (angle >> 8) & 0xff;
-		write(fileuart, angleret, 2);
+
+        sentMessageAngle(fileuart, angle);
+
 		count = 1;
 		memset(totalbuf, 0, 1024);
-        if (g_callback != NULL){
-	    char buf[256] = {0};
-	    snprintf(buf, 256, "cvlc --play-and-exit --aout alsa --alsa-audio-device hw:%d,0 /usr/local/bin/Videos/aaaa.mp3 &", get_audio_device_id());
-	    //system("mpg321 /usr/local/bin/Videos/aaaa.mp3 &");
-	    //system("cvlc --play-and-exit --aout alsa --alsa-audio-device hw:2,0 /usr/local/bin/Videos/aaaa.mp3 &");
-	    system(buf);
-            g_callback(g_callback_ctx, 2);
+        protocalAck(fileusb);
+
+        waitforReady_test(fileuart);
 
-        }
 	}
 	else
 	{
@@ -174,7 +298,7 @@ void sentUart(char *buf, int fileuart)
 
 }
 
-void circleReading()
+void circleReading()    //changed
 {
     printf("cicleReading..\n");
     serialFlush(fileusb);
@@ -197,14 +321,14 @@ void circleReading()
 			}
 			else
 			{
-				sentUart(buf, fileuart);     printf("                          %d\n", __LINE__);
+				sentUart(buf, fileuart, fileusb);     printf("                          %d\n", __LINE__);
+                serialFlush(fileusb);  //guarantee buf wont affect next input
 			}
 		}
     }
     return;
 }
 
-
 //localdimming
 void LocalDimming_Init()
 {
@@ -407,3 +531,36 @@ void eachPicWrite(int num, int pic)
         
         }
 }
+
+
+// void sentUart(char *buf, int fileuart)
+// {
+// 	if (count == 9)
+// 	{
+// 		strcat(totalbuf, buf);
+// 		uint16_t angle;
+// 		angle = getAngle(totalbuf);
+// 		printf("angle = %x\n", angle);
+// 		char angleret[2];
+// 		angleret[1] = angle & 0xff;
+// 		angleret[0] = (angle >> 8) & 0xff;
+// 		write(fileuart, angleret, 2);
+// 		count = 1;
+// 		memset(totalbuf, 0, 1024);
+//         if (g_callback != NULL){
+// 	    char buf[256] = {0};
+// 	    snprintf(buf, 256, "cvlc --play-and-exit --aout alsa --alsa-audio-device hw:%d,0 /usr/local/bin/Videos/aaaa.mp3 &", get_audio_device_id());
+// 	    //system("mpg321 /usr/local/bin/Videos/aaaa.mp3 &");
+// 	    //system("cvlc --play-and-exit --aout alsa --alsa-audio-device hw:2,0 /usr/local/bin/Videos/aaaa.mp3 &");
+// 	    system(buf);
+//             g_callback(g_callback_ctx, 2);
+	    
+//         }
+// 	}
+// 	else
+// 	{
+// 		count++;
+// 		strcat(totalbuf, buf);
+// 	}
+
+// }
\ No newline at end of file