Do and usart test

Dependencies:   mbed

Revision:
0:33045febf0da
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Mar 28 11:18:06 2019 +0000
@@ -0,0 +1,24 @@
+#include "mbed.h"
+#include <DigitalOut.h> 
+//DigitalOut myled(LED1);
+DigitalOut myled(PD_13);
+
+//Serial usart1(PB_6,PB_7,9600);//RS232通讯端口为PD8,PD9
+//Serial usart3(PD_8,PD_9,9600);//RS232通讯端口为PD8,PD9
+//Serial usart3(PB_10,PB_11,9600);//RS232通讯端口为PD8,PD9
+//Serial usart3(PC_10,PC_11,9600);//RS232通讯端口为PD8,PD9
+//Serial usart1(PA_9,PA_10,9600);//RS232通讯端口为PD8,PD9
+//Serial usart1(PA_9,PB_7,9600);//RS232通讯端口为PD8,PD9
+//Serial usart2(PA_2,PA_3,9600);//RS232通讯端口为PD8,PD9
+Serial usart6(PC_6,PC_7,9600);//RS232通讯端口为PD8,PD9
+int main() {
+    while(1) {
+        myled = 1;
+        wait(0.5);
+        myled = 0;
+        wait(0.5);    
+        //usart1.printf("Hello World\n");
+        //usart2.printf("Hello World\n");          
+        usart6.printf("Hello World\n");   
+    }
+}