part b Q1

Dependencies:   mbed

Revision:
0:86b2addd4f5f
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Jul 18 08:32:46 2020 +0000
@@ -0,0 +1,20 @@
+#include"mbed.h"
+
+Serial pc(USBTX,USBRX);//tx,rx
+PwmOut led(LED1);
+float brightness=0.0;
+int main()
+{
+    pc.printf("Press'^'toturnLED1brightnessup,'v'toturnitdown\n");
+    while(1) {
+        char c= pc.getc();
+        if((c=='^')&&(brightness<0.5)) {
+            brightness+=0.01;
+            led=brightness;
+        }
+        if((c=='v')&&(brightness>0.0)) {
+            brightness-=0.01;
+            led = brightness;
+        }
+    }
+}
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