void CInstrumentEditDlg::OnPaint()
{
CPaintDC dc(this); // device context for painting
// Do not call CDialog::OnPaint() for painting messages
const int WHITE_KEY_W = 10;
const int BLACK_KEY_W = 8;
CBitmap Bmp, WhiteKeyBmp, BlackKeyBmp, WhiteKeyMarkBmp, BlackKeyMarkBmp;
Bmp.CreateCompatibleBitmap(&dc, 800, 800);
WhiteKeyBmp.LoadBitmap(IDB_KEY_WHITE);
BlackKeyBmp.LoadBitmap(IDB_KEY_BLACK);
WhiteKeyMarkBmp.LoadBitmap(IDB_KEY_WHITE_MARK);
BlackKeyMarkBmp.LoadBitmap(IDB_KEY_BLACK_MARK);
CDC BackDC;
BackDC.CreateCompatibleDC(&dc);
CDCObjectContext c {BackDC, &Bmp}; // // //
CDC WhiteKey;
WhiteKey.CreateCompatibleDC(&dc);
CDCObjectContext c2 {WhiteKey, &WhiteKeyBmp}; // // //
CDC BlackKey;
BlackKey.CreateCompatibleDC(&dc);
CDCObjectContext c3 {BlackKey, &BlackKeyBmp}; // // //
const int WHITE[] = {NOTE_C, NOTE_D, NOTE_E, NOTE_F, NOTE_G, NOTE_A, NOTE_B};
const int BLACK_1[] = {NOTE_Cs, NOTE_Ds};
const int BLACK_2[] = {NOTE_Fs, NOTE_Gs, NOTE_As};
int Note = GET_NOTE(m_iActiveKey); // // //
int Octave = GET_OCTAVE(m_iActiveKey);
for (int j = 0; j < 8; j++) {
int Pos = (WHITE_KEY_W * 7) * j;
for (int i = 0; i < 7; i++) {
bool Selected = (Note == WHITE[i]) && (Octave == j) && m_iActiveKey != -1;
WhiteKey.SelectObject(Selected ? WhiteKeyMarkBmp : WhiteKeyBmp);
int Offset = i * WHITE_KEY_W;
BackDC.BitBlt(Pos + Offset, 0, 100, 100, &WhiteKey, 0, 0, SRCCOPY);
}
for (int i = 0; i < 2; i++) {
bool Selected = (Note == BLACK_1[i]) && (Octave == j) && m_iActiveKey != -1;
BlackKey.SelectObject(Selected ? BlackKeyMarkBmp : BlackKeyBmp);
int Offset = i * WHITE_KEY_W + WHITE_KEY_W / 2 + 1;
BackDC.BitBlt(Pos + Offset, 0, 100, 100, &BlackKey, 0, 0, SRCCOPY);
}
for (int i = 0; i < 3; i++) {
bool Selected = (Note == BLACK_2[i]) && (Octave == j) && m_iActiveKey != -1;
BlackKey.SelectObject(Selected ? BlackKeyMarkBmp : BlackKeyBmp);
int Offset = (i + 3) * WHITE_KEY_W + WHITE_KEY_W / 2 + 1;
BackDC.BitBlt(Pos + Offset, 0, 100, 100, &BlackKey, 0, 0, SRCCOPY);
}
}
dc.BitBlt(m_KeyboardRect.left, m_KeyboardRect.top, KEYBOARD_WIDTH, KEYBOARD_HEIGHT, &BackDC, 0, 0, SRCCOPY); // // //
}
int main() {
uint8_t i, id;
uint8_t timing[19]; // This controller control 18 keys
uint8_t cnt[19]; // This controller control 18 keys
uint32_t status[19]; // This controller control 18 keys
// program setup
discharge_ports();
SREG = 0; // No interrupts
DDRD |= _BV(PIND0); // NOTE: Only output pin is number 0
PORTD0_SBI;
for (i = 0; i < 19; i++) {
timing[i] = 0;
cnt[i] = 0;
status[i] = 0;
}
// main loop
while(1) {
// first step: check wether a key was pressed or not
for (i = 0; i < 19; i++) {
id = i + 1;
if (check_port(id)) {
if (!(status[i] & 0x80000000L)) // wasting a 0
cnt[i]++; // added one 1
// else // wasting 1, cnt does not change
status[i] <<= 1; // shift
status[i] |= 1; // last added is 1
if (cnt[i] > THRESHOLD) {
if (timing[i]) // key was already pressed
timing[i] = SUST;
else
timing[i] = SUST + 1;
}
} else {
if (status[i] & 0x80000000L) // wasting a 1
cnt[i]--; // removed one 1
// else // wasting 1, cnt does not change
status[i] <<= 1; // shift, last byte is already 1
if (timing[i])
timing[i]--;
}
}
discharge_ports(); // after reading discharges ports for the next reading
// second step: if some messages are true then send data to the synth
for (i = 0; i < 19; i++)
if (timing[i] == SUST + 1) {
send_message(0x80 | GET_NOTE(i));
} else if (timing[i] == 1) {
send_message(0x00 | GET_NOTE(i));
}
//_delay_us(100); // wait some time
}
return 0;
}
