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AUDIO: Miles Audio MT32: calculate sysex address

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calculate sysex address properly
This commit is contained in:
Martin Kiewitz 2015-06-30 17:55:47 +02:00
parent 7c3574ed52
commit ff3218ac14
1 changed files with 38 additions and 20 deletions
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58
audio/miles_mt32.cpp
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@ -121,6 +121,8 @@ private:
void MT32SysEx(const uint32 targetAddress, const byte *dataPtr);
uint32 calculateSysExTargetAddress(uint32 baseAddress, uint32 index);
void writeRhythmSetup(byte note, byte customTimbreId);
void writePatchTimbre(byte patchId, byte timbreGroup, byte timbreId);
void writePatchByte(byte patchId, byte index, byte patchValue);
@ -301,22 +303,12 @@ void MidiDriver_Miles_MT32::MT32SysEx(const uint32 targetAddress, const byte *da
sysExMessage[5] = (targetAddress >> 8) & 0xFF;
sysExMessage[6] = targetAddress & 0xFF;
// Adjust address in case it's needed
if (sysExMessage[6] >= 0x80) {
sysExMessage[5]++;
sysExMessage[6] -= 0x80;
for (byte targetAddressByte = 4; targetAddressByte < 7; targetAddressByte++) {
assert(sysExMessage[targetAddressByte] < 0x80); // security check
sysExChecksum -= sysExMessage[targetAddressByte];
}
if (sysExMessage[5] >= 0x80) {
sysExMessage[4]++;
sysExMessage[5] -= 0x80;
}
assert(sysExMessage[4] < 0x80); // security check
sysExChecksum -= sysExMessage[4];
sysExChecksum -= sysExMessage[5];
sysExChecksum -= sysExMessage[6];
sysExPos = 7;
sysExPos = 7;
while (1) {
sysExByte = *dataPtr++;
if (sysExByte == MILES_MT32_SYSEX_TERMINATOR)
@ -728,11 +720,36 @@ int16 MidiDriver_Miles_MT32::installCustomTimbre(byte patchBank, byte patchId) {
return customTimbreId;
}
uint32 MidiDriver_Miles_MT32::calculateSysExTargetAddress(uint32 baseAddress, uint32 index) {
uint16 targetAddressLSB = baseAddress & 0xFF;
uint16 targetAddressKSB = (baseAddress >> 8) & 0xFF;
uint16 targetAddressMSB = (baseAddress >> 16) & 0xFF;
// add index to it, but use 7-bit of the index for each byte
targetAddressLSB += (index & 0x7F);
targetAddressKSB += ((index >> 7) & 0x7F);
targetAddressMSB += ((index >> 14) & 0x7F);
// adjust bytes, so that none of them is above or equal 0x80
while (targetAddressLSB >= 0x80) {
targetAddressLSB -= 0x80;
targetAddressKSB++;
}
while (targetAddressKSB >= 0x80) {
targetAddressKSB -= 0x80;
targetAddressMSB++;
}
assert(targetAddressMSB < 0x80);
// put everything together
return targetAddressLSB | (targetAddressKSB << 8) | (targetAddressMSB << 16);
}
void MidiDriver_Miles_MT32::writeRhythmSetup(byte note, byte customTimbreId) {
byte sysExData[2];
uint32 targetAddress = 0;
targetAddress = 0x030110 + ((note - 24) << 2);
targetAddress = calculateSysExTargetAddress(0x030110, ((note - 24) << 2));
sysExData[0] = customTimbreId;
sysExData[1] = MILES_MT32_SYSEX_TERMINATOR; // terminator
@ -744,10 +761,11 @@ void MidiDriver_Miles_MT32::writePatchTimbre(byte patchId, byte timbreGroup, byt
byte sysExData[3];
uint32 targetAddress = 0;
targetAddress = 0x050000 + (patchId << 3);
// write to patch memory (starts at 0x050000, each entry is 8 bytes)
targetAddress = calculateSysExTargetAddress(0x050000, patchId << 3);
sysExData[0] = timbreGroup;
sysExData[1] = timbreId;
sysExData[0] = timbreGroup; // 0 - group A, 1 - group B, 2 - memory, 3 - rhythm
sysExData[1] = timbreId; // timbre number (0-63)
sysExData[2] = MILES_MT32_SYSEX_TERMINATOR; // terminator
MT32SysEx(targetAddress, sysExData);
@ -757,7 +775,7 @@ void MidiDriver_Miles_MT32::writePatchByte(byte patchId, byte index, byte patchV
byte sysExData[2];
uint32 targetAddress = 0;
targetAddress = 0x050000 + ((patchId << 3) + index );
targetAddress = calculateSysExTargetAddress(0x050000, (patchId << 3) + index);
sysExData[0] = patchValue;
sysExData[1] = MILES_MT32_SYSEX_TERMINATOR; // terminator
@ -769,7 +787,7 @@ void MidiDriver_Miles_MT32::writeToSystemArea(byte index, byte value) {
byte sysExData[2];
uint32 targetAddress = 0;
targetAddress = 0x100000 | index;
targetAddress = calculateSysExTargetAddress(0x100000, index);
sysExData[0] = value;
sysExData[1] = MILES_MT32_SYSEX_TERMINATOR; // terminator