David Bottrill
USBMIDI sampled pipe organ uses real pipe organ samples to produce a realistic sound with 16 note polyphony. A serial output will drive external TPIC6A596 shift registers that could be used to drive pipe organ magnets (Solenoid valves)
Dependencies: TextLCD USBDevice mbed
Diff: main.cpp
- Revision:
- 23:31cb90fa661f
- Parent:
- 22:7d4e07edf503
- Child:
- 26:7b9267a5b3c3
--- a/main.cpp Sun Nov 15 11:37:09 2015 +0000
+++ b/main.cpp Sun Nov 15 12:55:31 2015 +0000
@@ -92,13 +92,13 @@
int x =0;
int x1=1;
-int sw1_count=0; //Switch de-bounce counter
-int sw1_old=0;
-int sw1_phase=0;
-int sw3_count=0; //Switch de-bounce counter
-int sw3_old=0;
-int sw3_phase=0;
-unsigned char stops[5];
+unsigned int swi;
+unsigned int pressed;
+unsigned int sw[8];
+unsigned int sw_count[8]; //Switch de-bounce counter
+unsigned int sw_phase[8];
+unsigned int sw_status[8]= {0,1,0,0,0,0,0,0};
+unsigned int sw_old[8];
int oldstops=1;
//Sound generator variables
@@ -233,19 +233,19 @@
case MIDIMessage::NoteOnType: //MIDI note on received
if (key >23 & key<120) {
onoff=1;
- if (stops[0]==0 & key >35) {
+ if (sw_status[0]==1 & key >35) {
keybuf[(key-36)]|= 1 << 0; //Store @ 16' pitch
}
- if (stops[1]==0) {
+ if (sw_status[1]==1) {
keybuf[(key-24)]|= 1 << 1; //Store @ 8' pitch
}
- if (stops[2]==0& key<108) {
+ if (sw_status[2]==1& key<108) {
keybuf[(key)-12]|= 1 << 2; //Store @ 4' pitch
}
- if (stops[3]==0 & key<101) {
+ if (sw_status[3]==1 & key<101) {
keybuf[(key)-5]|= 1 << 3; //Store @ 2 2/3' pitch
}
- if (stops[4]==0 & key <96) {
+ if (sw_status[4]==1 & key <96) {
keybuf[(key)]|= 1 << 4; //Store @ 2' pitch
}
}
@@ -404,49 +404,41 @@
wait_us(4);
//Read Stop inputs
- stops[0]=p1;
- stops[1]=p2;
- stops[2]=p3;
- stops[3]=p4;
- stops[4]=p5;
+ sw[0]=p1;
+ sw[1]=p2;
+ sw[2]=p3;
+ sw[3]=p4;
+ sw[4]=p5;
+ sw[6]=sw1;
+ sw[7]=sw3;
//Additional code to de-bounce the K64F onboard switches again using multiple loops to de-bounce; has 3 states:
//0 - Button not pressed
//1 - Button pressed waiting for de-bounce count of 10 loops
//2 - Button press stable, this status can be read as the de-bounced status indicating the button press is clean
-// De-bounce SW1
- if (sw1_phase==0 & sw1==0) { //Button just been pressed
- sw1_phase=1;
- sw1_count=10;
- }
- if (sw1_phase==1 & sw1_count==0 & sw1==0) { //Button still pressed after de-bounce period
- sw1_phase=2;
- }
- if (sw1_phase==1 & sw1_count==0 & sw1==1) { //Button no longer pressed after de-bounce period
- sw1_phase=0;
- }
- if (sw1_phase==2 & sw1==1) { //Button released
- sw1_phase=0;
+// De-bounce Switches
+ pressed=0;
+ for (swi=0; swi<8; swi++) { //Process 8 witches
+ if (sw_phase[swi]==0 & sw[swi]==0) { //Button just been pressed
+ sw_phase[swi]=1;
+ sw_count[swi]=10;
+ }
+ if (sw_phase[swi]==1 & sw_count[swi]==0 & sw[swi]==0) { //Button still pressed after de-bounce period
+ sw_phase[swi]=2;
+ pressed++; //Inc button pressed count
+ sw_status[swi]=!sw_status[swi]; //Toggle switch status
+ }
+ if (sw_phase[swi]==1 & sw_count[swi]==0 & sw[swi]==1) { //Button no longer pressed after de-bounce period
+ sw_phase[swi]=0;
+ }
+ if (sw_phase[swi]==2 & sw[swi]==1) { //Button released
+ sw_phase[swi]=0;
+ }
+ sw_count[swi]--;
}
- sw1_count--;
-// De-bounce SW3
- if (sw3_phase==0 & sw3==0) { //Button just been pressed
- sw3_phase=1;
- sw3_count=10;
- }
- if (sw3_phase==1 & sw3_count==0 & sw3==0) { //Button still pressed after de-bounce period
- sw3_phase=2;
- }
- if (sw3_phase==1 & sw3_count==0 & sw3==1) { //Button no longer pressed after de-bounce period
- sw3_phase=0;
- }
- if (sw3_phase==2 & sw3==1) { //Button released
- sw3_phase=0;
- }
- sw3_count--;
-//light blue LED if either button presed
- if (sw1_phase==2 | sw3_phase==2) {
+//light blue LED if any button presed
+ if (pressed>0) {
blueled=0;
} else {
blueled=1;
@@ -454,24 +446,18 @@
//Button 1 will clear all playing notes & switch sampleset
- if (sw1_phase != sw1_old) {
- if(sw1_phase==2) {
+ if (sw_status[6] != sw_old[6]) {
for (cl=0; cl<108; cl++) {
keybuf[cl]=0; //Clear Keybuf
}
- sampleset++;
+ sampleset=sw_status[6];
oldstops=255; //Force a display refresh
- if (sampleset>1) {
- sampleset=0;
- }
- }
- sw1_old=sw1_phase;
+ sw_old[6]=sw_status[6];
}
//Check for display mode button being presed
- if (sw3_phase != sw3_old) { //Mode Switch pressed
- if(sw3_phase==2) {
+ if (sw_status[7] != sw_old[7]) { //Mode Switch pressed
lcdmode++;
if (lcdmode>4) {
lcdmode=0;
@@ -510,8 +496,7 @@
if (lcdmode==4) {
oldstops=255; //Force a refresh
}
- }
- sw3_old=sw3_phase;
+ sw_old[7]=sw_status[7];
}
@@ -614,7 +599,7 @@
//Stop display
if (lcdmode==4) {
- pos=stops[0] + stops[1]+stops[2]+stops[3]+stops[4];
+ pos=sw_status[0] + sw_status[1]+sw_status[2]+sw_status[3]+sw_status[4];
if (oldstops != pos) {
oldstops=pos;
lcd.cls();
@@ -627,23 +612,23 @@
}
}
lcd.locate(0,1);
- if (stops[0]==0) {
+ if (sw_status[0]==1) {
lcd.printf("16 ");
}
- if (stops[1]==0) {
+ if (sw_status[1]==1) {
lcd.printf("8 ");
}
- if (stops[2]==0) {
+ if (sw_status[2]==1) {
lcd.printf("4 ");
}
- if (stops[3]==0) {
+ if (sw_status[3]==1) {
lcd.printf("2-2/3 ");
}
- if (stops[4]==0) {
+ if (sw_status[4]==1) {
lcd.printf("2");
}
}