Diff: main.cpp

Revision:

0:771fd7f08681

Child:

1:db4dbd6734e6

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Mar 10 05:12:57 2016 +0000
@@ -0,0 +1,95 @@
+/* Drum pad demo program
+ * Copyright (c) 2016 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *  *
+ *  @author  Toyomasa Watarai
+ *  @version 1.0
+ *  @date    10-March-2016
+ *
+ *  Sparkfun Touch Sheild
+ *  eVY1 board
+ *  LPCXpresso842-MAX
+ *
+ */
+
+#include "mbed.h"
+#include "MPR121.h"
+
+DigitalOut myled(LED1);
+I2C i2c(A4, A5);
+InterruptIn irq(D2);
+
+#define LED_ON  0
+#define LED_OFF 1
+
+MPR121 touch_pad(i2c, irq, MPR121::ADDR_VSS);
+RawSerial midi(D1, NC);
+
+const int key_tbl[9] = {
+    38, // 9
+    39, // 6
+    41, // 3
+    42, // 8
+    45, // 5
+    49, // 2
+    67, // 7
+    79, // 4
+    36, // 1
+};
+
+int key_pressed[9];
+
+int main()
+{
+    touch_pad.init();
+    touch_pad.enable();
+
+    midi.baud(31250);
+    wait(3.5);    // Wait few seconds for booting eVY1-Shleld.
+
+    // Initialize (Phonetic symbols - eVocaloid)
+    const uint8_t aMsgInit[] = "\xF0\x43\x79\x09\x00\x50\x10" "4 a\0" "\xF7";
+    for (uint32_t i = 0; i < sizeof(aMsgInit)-1; midi.putc(aMsgInit[i++]));
+
+    const uint8_t aMsgVol[] = "\xB9\x07\x70";
+    for (uint32_t i = 0; i < sizeof(aMsgVol)-1; midi.putc(aMsgVol[i++]));
+
+    while(1) {
+        if(touch_pad.isPressed()) {
+            uint16_t button_val = touch_pad.buttonPressed();
+            if (button_val != 0) {
+                for(int i=0; i<9; i++) {
+                    if ((button_val & (1 << i))) {
+                        if (key_pressed[i] == 0) {
+                            midi.putc(0x99);       // note on CH10
+                            midi.putc(key_tbl[i]); // note number
+                            midi.putc(100);        // velocity
+                            key_pressed[i] = 1;
+                        }
+                    }
+                }
+            } else {
+                for(int i=0; i<9; i++) {
+                    if ((button_val & (1 << i)) == 0) {
+                        key_pressed[i] = 0;
+                        midi.putc(0x89);       // note off CH10
+                        midi.putc(key_tbl[i]); // note number
+                        midi.putc(0);          // velocity
+                    }
+                }
+            }
+            myled = (button_val>0) ? LED_ON : LED_OFF;
+        }
+    }
+}