// ----- Defines -----
-// Pinout Defines
-#define HOLD_PORT PORTD
-#define HOLD_DDR DDRD
-#define HOLD_PIN 3
-
// ----- Macros -----
// Buffer used to inform the macro processing module which keys have been detected as pressed
volatile uint8_t KeyIndex_Buffer[KEYBOARD_BUFFER];
volatile uint8_t KeyIndex_BufferUsed;
-volatile uint8_t KeyIndex_Add_InputSignal; // Used to pass the (click/input value) to the keyboard for the clicker
-
-// Buffer Signals
-volatile uint8_t BufferReadyToClear;
+static uint8_t KeyBuffer[3];
+static uint8_t KeyBufferCount = 0;
// ----- Function Declarations -----
-void processKeyValue( uint8_t keyValue );
+void processKeyValue( uint8_t valueType, uint8_t keyValue );
void removeKeyValue( uint8_t keyValue );
{
cli(); // Disable Interrupts
- uint8_t keyValue = 0x00;
- uint8_t keyState = 0x00;
-
- // Read the scancode packet from the USART (1st to 8th bits)
- keyValue = UDR1;
- // Read the release/press bit (9th bit) XXX Unnecessary, and wrong it seems, parity bit? or something else?
- keyState = UCSR1B & 0x02;
+ // Read part of the scan code (3 8bit chunks) from USART
+ KeyBuffer[KeyBufferCount] = UDR1;
- // High bit of keyValue, also represents press/release
- keyState = keyValue & 0x80 ? 0x00 : 0x02;
-
- // Debug
- char tmpStr[6];
- hexToStr( keyValue & 0x7F, tmpStr );
-
- // Process the scancode
- switch ( keyState )
+ if ( KeyBufferCount >= 2 )
{
- case 0x00: // Released
- dPrintStrs( tmpStr, "R " ); // Debug
-
- // Remove key from press buffer
- removeKeyValue( keyValue & 0x7F );
- break;
+ KeyBufferCount = 0;
- case 0x02: // Pressed
- dPrintStrs( tmpStr, "P " ); // Debug
+ // Debug
+ for ( uint8_t c = 0; c <= 2; c++ )
+ {
+ // Debug
+ char tmpStr[6];
+ hexToStr( KeyBuffer[c], tmpStr );
+ dPrintStrs( tmpStr, " " ); // Debug
+ }
+ print("\n");
- // New key to process
- processKeyValue( keyValue & 0x7F );
- break;
+ processKeyValue( KeyBuffer[1], KeyBuffer[2] );
+ }
+ else
+ {
+ KeyBufferCount++;
}
sei(); // Re-enable Interrupts
// Setup baud rate
// 16 MHz / ( 16 * Baud ) = UBRR
- // Baud <- 0.823284 ms per bit, thus 1000 / 0.823284 = 1214.65004 -> 823.2824
- // Thus baud setting = 823
- uint16_t baud = 823; // Max setting of 4095
+ // Baud: 4817 -> 16 MHz / ( 16 * 4817 ) = 207.5981
+ // Thus baud setting = 208
+ uint16_t baud = 208; // Max setting of 4095
UBRR1H = (uint8_t)(baud >> 8);
UBRR1L = (uint8_t)baud;
- // Enable the receiver, and RX Complete Interrupt as well as 9 bit data
- UCSR1B = 0x94;
+ // Enable the receiver, transmitter, and RX Complete Interrupt
+ UCSR1B = 0x98;
- // The transmitter is only to be enabled when needed
- // Set the pin to be pull-up otherwise (use the lowered voltage inverter in order to sink)
- HOLD_DDR &= ~(1 << HOLD_PIN);
- HOLD_PORT |= (1 << HOLD_PIN);
-
- // Set frame format: 9 data, 1 stop bit, no parity
+ // Set frame format: 8 data, 1 stop bit, odd parity
// Asynchrounous USART mode
- UCSR1C = 0x06;
-
- // Initially buffer doesn't need to be cleared (it's empty...)
- BufferReadyToClear = 0;
-
- // InputSignal is off by default
- KeyIndex_Add_InputSignal = 0x00;
+ UCSR1C = 0x36;
// Reset the keyboard before scanning, we might be in a wierd state
scan_resetKeyboard();
// Main Detection Loop
-// Not needed for the BETKB, this is just a busy loop
inline uint8_t scan_loop()
{
return 0;
}
-void processKeyValue( uint8_t keyValue )
+void processKeyValue( uint8_t valueType, uint8_t keyValue )
{
- // Interpret scan code
- switch ( keyValue )
+ switch ( valueType )
{
- case 0x00: // Break code from input?
+ // Single Key Press
+ case 0x00:
break;
- default:
- // Make sure the key isn't already in the buffer
- for ( uint8_t c = 0; c < KeyIndex_BufferUsed + 1; c++ )
+ // Repeated Key Press
+ case 0x01:
+ break;
+ // Modifier Key Release
+ case 0x02:
+ removeKeyValue( keyValue );
+ return;
+ }
+
+ // Make sure the key isn't already in the buffer
+ for ( uint8_t c = 0; c < KeyIndex_BufferUsed + 1; c++ )
+ {
+ // Key isn't in the buffer yet
+ if ( c == KeyIndex_BufferUsed )
{
- // Key isn't in the buffer yet
- if ( c == KeyIndex_BufferUsed )
- {
- bufferAdd( keyValue );
-
- // Only send data if enabled
- if ( KeyIndex_Add_InputSignal )
- scan_sendData( KeyIndex_Add_InputSignal );
- break;
- }
-
- // Key already in the buffer
- if ( KeyIndex_Buffer[c] == keyValue )
- break;
+ bufferAdd( keyValue );
+ break;
}
- break;
+
+ // Key already in the buffer
+ if ( KeyIndex_Buffer[c] == keyValue )
+ break;
}
}
// Send data
uint8_t scan_sendData( uint8_t dataPayload )
{
- // Enable the USART Transmitter
- UCSR1B |= (1 << 3);
-
// Debug
char tmpStr[6];
hexToStr( dataPayload, tmpStr );
UDR1 = dataPayload;
- // Wait for the payload
- _delay_us( 800 );
-
- // Disable the USART Transmitter
- UCSR1B &= ~(1 << 3);
-
return 0;
}
// Signal that the keys have been properly sent over USB
void scan_finishedWithUSBBuffer( void )
{
+ // Count for number of modifiers to maintain in the buffer
+ uint8_t filled = 0;
+ uint8_t latched = 0;
+ uint8_t latchBuffer[13]; // There are only 13 keys that can possibly be latched at the same time...
+ uint8_t normal = 0;
+
+ // Clean out all keys except "special" keys (designated modifiers)
+ for ( uint8_t c = 0; c < KeyIndex_BufferUsed; c++ )
+ {
+ switch ( KeyIndex_Buffer[c] )
+ {
+ // Dedicated Modifier Keys
+ // NOTE: Both shifts are represented as the same scan code
+ case 0x04:
+ case 0x05:
+ case 0x12:
+ KeyIndex_Buffer[filled++] = KeyIndex_Buffer[c];
+ break;
+ // Latched Keys, only released if a non-modifier is pressed along with it
+ // NOTE: This keys do not have a built in repeating
+ case 0x00:
+ case 0x01:
+ case 0x03:
+ case 0x0B:
+ case 0x22:
+ case 0x10:
+ case 0x11:
+ case 0x20:
+ case 0x21:
+ case 0x30:
+ case 0x31:
+ case 0x40:
+ case 0x41:
+ latchBuffer[latched++] = KeyIndex_Buffer[c];
+ break;
+ // Allow the scancode to be removed, normal keys
+ default:
+ normal++;
+ break;
+ }
+ }
+
+ // Reset the buffer counter
+ KeyIndex_BufferUsed = filled;
+
+ // Only "re-add" the latched keys if they weren't used
+ if ( latched > 0 && normal == 0 )
+ {
+ for ( uint8_t c = 0; c < latched; c++ )
+ {
+ bufferAdd( latchBuffer[c] );
+ }
+ }
}
// Reset/Hold keyboard
-// NOTE: Does nothing with the BETKB
+// NOTE: Does nothing with the FACOM6684
void scan_lockKeyboard( void )
{
}
-// NOTE: Does nothing with the BETKB
+// NOTE: Does nothing with the FACOM6684
void scan_unlockKeyboard( void )
{
}
{
// Not a calculated valued...
_delay_ms( 50 );
+
+ KeyBufferCount = 0;
+ KeyIndex_BufferUsed = 0;
}
projects / kiibohd-controller.git / blobdiff