Revision 0:4d1fe8f35716, committed 2011-07-06

Comitter:

yamaguch

Date:

Wed Jul 06 09:34:54 2011 +0000

Commit message:

0.9

Changed in this revision

diff -r 000000000000 -r 4d1fe8f35716 YMZ294.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/YMZ294.cpp	Wed Jul 06 09:34:54 2011 +0000
@@ -0,0 +1,63 @@
+#include "YMZ294.h"
+
+const int ADDR_FREQ[] = {0, 2, 4};
+const int ADDR_NOISE = 6;
+const int ADDR_MIXER = 7;
+const int ADDR_VOL[] = {8, 9, 10};
+const int ADDR_ENV_FREQ = 11;
+const int ADDR_ENV_SHAPE = 13;
+
+YMZ294::YMZ294(PinName dataPin0, PinName dataPin1, PinName dataPin2, PinName dataPin3,
+               PinName dataPin4, PinName dataPin5, PinName dataPin6, PinName dataPin7,
+               PinName csPin, PinName wrPin, PinName a0Pin) :
+        dataPins(dataPin0, dataPin1, dataPin2, dataPin3, dataPin4, dataPin5, dataPin6, dataPin7),
+        csPin(csPin), wrPin(wrPin), a0Pin(a0Pin) {}
+
+void YMZ294::setTone(Channel channel, float freq) {
+    if (freqs[channel] != freq) {
+        int tp = 125000.0 / freq; // tp <= 4095 or freq > 30.525
+        writeData(ADDR_FREQ[channel], tp, 2);
+        freqs[channel] = freq;
+    }
+}
+
+void YMZ294::setVolume(Channel channel, int volume) {
+    if (volumes[channel] != volume || volume == 16) {
+        writeData(ADDR_VOL[channel], volume & 0x1F);
+        volumes[channel] = volume;
+    }
+}
+
+void YMZ294::setNoise(int freq) {
+    if (noiseFreq != freq) {
+        writeData(ADDR_NOISE, freq & 0x1F);
+        noiseFreq = freq;
+    }
+}
+
+void YMZ294::setEnvelope(int freq, int shape) {
+    writeData(ADDR_ENV_FREQ, freq, 2);
+    writeData(ADDR_ENV_SHAPE, shape);
+}
+
+void YMZ294::setMixer(Mixer m0, Mixer m1, Mixer m2, Mixer m3, Mixer m4, Mixer m5) {
+    writeData(ADDR_MIXER, m0 & m1 & m2 & m3 & m4 & m5);
+}
+
+void YMZ294::write(char data, bool dataWrite) {
+    wrPin = 0;
+    csPin = 0;
+    a0Pin = dataWrite;
+    dataPins = data;
+    wrPin = 1;
+    csPin = 1;
+}
+
+void YMZ294::writeData(char address, int data, int nBytes) {
+    write(address);
+    write(data & 0xFF, true);
+    while (--nBytes) {
+        write(++address);
+        write((data >>= 8) & 0xFF, true);
+    }
+}
\ No newline at end of file

diff -r 000000000000 -r 4d1fe8f35716 YMZ294.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/YMZ294.h	Wed Jul 06 09:34:54 2011 +0000
@@ -0,0 +1,35 @@
+#ifndef MBED_YMZ294_H
+#define MBED_YMZ294_H
+
+#include "mbed.h"
+
+enum Channel {CHANNEL_A = 0, CHANNEL_B, CHANNEL_C};
+
+enum Mixer {NONE = 0x3F,
+            TONE_A = ~(1 << 0), TONE_B = ~(1 << 1), TONE_C = ~(1 << 2),
+            NOISE_A = ~(1 << 3), NOISE_B = ~(1 << 4), NOISE_C = ~(1 << 5)
+           };
+
+class YMZ294 {
+public:
+    YMZ294(PinName dataPin0, PinName dataPin1, PinName dataPin2, PinName dataPin3,
+           PinName dataPin4, PinName dataPin5, PinName dataPin6, PinName dataPin7,
+           PinName csPin, PinName wrPin, PinName a0Pin);
+    void setTone(Channel channel, float freq);
+    void setVolume(Channel channel, int volume);
+    void setNoise(int freq);
+    void setEnvelope(int freq, int shape);
+    void setMixer(Mixer m0, Mixer m1 = NONE, Mixer m2 = NONE, Mixer m3 = NONE, Mixer m4 = NONE, Mixer m5 = NONE);
+private:
+    void write(char data, bool dataWrite = false);
+    void writeData(char address, int data, int nBytes = 1);
+
+    BusOut dataPins;
+    DigitalOut csPin;
+    DigitalOut wrPin;
+    DigitalOut a0Pin;
+    char volumes[3];
+    float freqs[3];
+    float noiseFreq;
+};
+#endif
\ No newline at end of file