update

uart_read_test_main.cpp

@@ -64,11 +64,12 @@ int main(int argc, char *argv[]) {
   openuart(&dev, argv[1], baundrate_find_result->second);
   char buf[1024] = {0};
   memset(buf, 0x55, 1024);
-  for (size_t i = 0;; i++) {
+  for (size_t i = 0;;) {
     int ret1, ret2;
     ret1 = uartReceive(&dev, buf, 2 /*接收的字节数2-1*/);  // send the received text over UART
     if (ret1 != 0) {
       printf("%x", buf[0]);
+      i++;
     }
     fflush(stdout);
     if (i % 20 == 0) {