修改文档

README.md

@@ -21,3 +21,51 @@ cd wiringPi_Blueberry
 bash build clean
 bash build 
 ```
+
+## 测试
+```c
+#include <wiringPi.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+
+int main(int argc, char *argv[])
+{
+    char* usage = "LED flashing\nUsage: %s [wPi]\r\n";
+    int pin_number = 0;
+    
+    if (argc != 2) {
+        printf(usage, argv[0]);
+        exit(0);
+    } else {
+        if (isdigit(*argv[1])) {
+            pin_number = atoi(argv[1]);
+            // do something with pin_number
+            printf("Pin number is %d\n", pin_number);
+        } else {
+            printf("Invalid input for pin number: %s\n", argv[1]);
+            exit(1);
+        }
+    }
+    
+
+    wiringPiSetup();
+    pinMode(pin_number, OUTPUT);
+    
+    while (1)
+    {
+        digitalWrite(pin_number, HIGH);
+        delay(1000);
+        digitalWrite(pin_number, LOW);
+        delay(1000);
+    }
+    
+    return 0;
+}
+
+
+gcc -Wall -g -Os led_flashing.c -lwiringPi -lpthread
+./a.out 3
+
+```