Iain Veitch
/
ME21001_Lab04_Exercise_04
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Revision 0:a06d2b459821, committed 2018-10-16
- Comitter:
- iveitch
- Date:
- Tue Oct 16 17:54:19 2018 +0000
- Commit message:
- Lab 4 Ex 4
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
| mbed.bld | Show annotated file Show diff for this revision Revisions of this file |
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue Oct 16 17:54:19 2018 +0000
@@ -0,0 +1,59 @@
+/**************************************************************
+/ ME21001 Group m-nn
+/
+/ Lab 04 Exercise 4
+/
+/ This program reads an analogue input and displays the results
+/ to the PC
+/
+*/
+#include "mbed.h"
+Serial pc(USBTX, USBRX); // USB serial interface
+
+AnalogIn A_in(p17); // analogue input pin for reference values
+PwmOut led1(LED1);
+PwmOut led2(LED2);
+PwmOut led3(LED3);
+PwmOut led4(LED4);
+int main() {
+
+float analogue_val=0.0; // variable to hold the analogue input
+ // values as decimals
+ // set the USB serial interface baud rate
+led1.period(0.020);
+led2.period(0.020);
+led3.period(0.020);
+led4.period(0.020);
+
+
+ while(1) { // repeat indefinitely
+
+ // read the voltage on the analogue input pin and
+ // convert it to a
+ // decimal number with 12-bit resolution
+
+analogue_val = A_in.read(); // export the readings to a terminal program
+ // via the USB cable
+if( analogue_val<0.25){
+ led1=(analogue_val/0.25);
+ led2=led3=led4=0;
+ }
+ else if (analogue_val<0.5){
+ led1=1;
+ led2=((analogue_val-0.25)/0.25);
+ led3=led4=0;
+ }
+ else if (analogue_val<0.75){
+ led1=led2=1;
+ led3=((analogue_val-0.5)/0.25);
+ led4=0;
+ }
+ else{
+ led1=led2=led3=1;
+ led4=((analogue_val-0.75)/0.25);
+ }
+ wait(0.l);
+ }
+ }
+
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Tue Oct 16 17:54:19 2018 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/mbed_official/code/mbed/builds/e95d10626187 \ No newline at end of file