Revision 3:64f0ba828a2e, committed 2014-04-01

Comitter:

kayekss

Date:

Tue Apr 01 16:19:56 2014 +0000

Parent:

2:844bedc9dc63

Commit message:

(1) Photo sensor input is digitized as the circuitry adds an external Schmitt-Trigger (2) Input Selector switch's logic is inverted

Changed in this revision

--- a/HysteresisIn.lib	Sat Mar 29 16:19:42 2014 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,1 +0,0 @@
-http://mbed.org/users/kayekss/code/HysteresisIn/#fe43537bd3d6

--- a/main.cpp	Sat Mar 29 16:19:42 2014 +0000
+++ b/main.cpp	Tue Apr 01 16:19:56 2014 +0000
@@ -1,7 +1,6 @@
 #include <stdio.h>
 #include "mbed.h"
 #include "defs.h"
-#include "HysteresisIn.h"
 #include "SDFileSystem.h"
 #include "VS1053.h"
 #include "ACM1602.h"
@@ -13,16 +12,14 @@
 SDFileSystem sd(/*MOSI*/ p11, /*MISO*/ p12, /*SCK*/ p13, /*CS*/ p21, /*Mountpoint*/ "sd");
 VS1053       mp3(/*MOSI*/ p11, /*MISO*/ p12, /*SCK*/ p13,
                  /*CS*/ p22, /*BSYNC*/ p23, /*DREQ*/ p24, /*RST*/ p25, /*SPI freq.*/ 4000000);
-HysteresisIn sens3(p17, H_TO_L_THRES, L_TO_H_THRES, 1);  // Photo sensor #3 (Outer)
-HysteresisIn sens2(p18, H_TO_L_THRES, L_TO_H_THRES, 1);  // Photo sensor #2
-HysteresisIn sens1(p19, H_TO_L_THRES, L_TO_H_THRES, 1);  // Photo sensor #1
-HysteresisIn sens0(p20, H_TO_L_THRES, L_TO_H_THRES, 1);  // Photo sensor #0 (Inner)
+BusIn        sens(/*Out: 0*/ p20, /*1*/ p19, /*2*/ p18, /*In: 3*/ p17);
+BusIn        test(/*Out: 0*/ p26, /*1*/ p27, /*2*/ p28, /*In: 3*/ p29);
 ACM1602      lcd(/*SDA*/ p9, /*SCL*/ p10, /*Address*/ 0xa0);
 DigitalOut   audioPower(p30);
-DigitalIn    test3(p17);
-DigitalIn    test2(p18);
-DigitalIn    test1(p19);
-DigitalIn    test0(p20);
+DigitalIn    test3(p29);
+DigitalIn    test2(p28);
+DigitalIn    test1(p27);
+DigitalIn    test0(p26);
 DigitalIn    inputSelector(p8);
 // Set unused pins to input when using the LPCXpresso board
 BusIn        __dummy(xp21, xp22, xp23, xp24, xp49, xp50, xp51, xp52, xp53);
@@ -43,7 +40,7 @@
 /** Setup and initializations */
 void setup(void) {
     // Reduce system clock frequency to 48 MHz
-    setSystemFrequency(0x3, 0x1, 6, 1);
+    setSystemFrequency(0x03, 0x01, 6, 1);
     
     // Power down Ethernet PHY
     PHY_PowerDown();
@@ -77,15 +74,12 @@
     
     // Read all photo sensor inputs
     if (inputFrom) {
-        bitPattern =   (test3 << 3)
-                     | (test2 << 2)
-                     | (test1 << 1)
-                     |  test0;
+        // Read from photo sensors when Input Selector reads high
+        // (Input is inverted by 74HC14)
+        bitPattern = ~sens & 0xf;
     } else {
-        bitPattern =   (sens3.read() << 3)
-                     | (sens2.read() << 2)
-                     | (sens1.read() << 1)
-                     |  sens0.read();
+        // Read from test pins when Input Selector reads low
+        bitPattern = test;
     }
     
     switch (bitPattern) {