Lee Nam Cheol / Mbed OS lab03-pwn-sg90-servo

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Diff: main.cpp

Revision:
1:89d23c8072af
Parent:
0:f31836d48420
--- a/main.cpp	Sun Mar 29 19:41:28 2020 +0000
+++ b/main.cpp	Tue Apr 21 12:20:31 2020 +0000
@@ -1,18 +1,16 @@
 #include "mbed.h"
 
-// https://os.mbed.com/docs/mbed-os/v5.15/tools/creating-a-new-program.html
-
-Serial pc(USBTX, USBRX, 115200);    // baud rate 115200
-DigitalOut led(LED1);               // led = LED1
+PwmOut servo(PTA1);   //servo = PTA1
 
 int main()
 {
-    while (true) {
-        led = 0;
-        printf("LED1 is ON\r\n");
-        thread_sleep_for(500);
-        led = 1;
-        printf("LED1 is OFF\r\n");
-        thread_sleep_for(500);
+    float w;
+
+    servo.period(20.0 / 1000.0);    //period = 20ms for SG90 servo
+    while (true) { //500 ~ 2500us for degree 0 to 180
+        for(w = 500; w <= 2500; w += 100) {
+            servo.write(w / (20.0 * 1000.0));
+            thread_sleep_for(1000);
+        }
     }
 }
\ No newline at end of file