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- /* Copyright (C) 2011 by Jacob Alexander
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
- // ----- Includes -----
-
- // Compiler Includes
- #include <Lib/ScanLib.h>
-
- // Project Includes
- #include <led.h>
- #include <print.h>
-
- // Local Includes
- #include "scan_loop.h"
-
-
-
- // ----- Defines -----
-
- // Pinout Defines
- #define SPKR_PORT PORTD
- #define SPKR_DDR DDRD
- #define SPKR_POS 1
-
- #define POWR_PORT PORTC
- #define POWR_DDR DDRC
- #define POWR_POS 7
-
-
-
- // ----- Macros -----
-
- // Make sure we haven't overflowed the buffer
- #define bufferAdd(byte) \
- if ( KeyIndex_BufferUsed < KEYBOARD_BUFFER ) \
- KeyIndex_Buffer[KeyIndex_BufferUsed++] = byte
-
-
-
- // ----- Variables -----
-
- // 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;
-
-
-
- // ----- Functions -----
-
- // Setup
- inline void scan_setup()
- {
- // Setup the the USART interface for keyboard data input
-
- // Setup baud rate
- // 16 MHz / ( 16 * Baud ) = UBRR
- // Baud <- 0.10450 ms per bit, thus 1000 / 0.10450 = 9569.4
- // Thus UBRR = 104.50
- // To deal with the 0.5, setting to double speed, which means UBRR = 209
- uint16_t baud = 209; // Max setting of 4095
- UBRR1H = (uint8_t)(baud >> 8);
- UBRR1L = (uint8_t)baud;
-
- // Enable Double Read Speed
- UCSR1A = 0x02;
-
- // Enable the receiver, transitter, and RX Complete Interrupt
- UCSR1B = 0x98;
-
- // Set frame format: 8 data, no stop bits or parity
- // Asynchrounous USART mode
- UCSR1C = 0x06;
-
- // Set Speaker Pin to Pull-Up gives a low-volume click (XXX no other setting does, why?)
- SPKR_DDR &= ~(1 << SPKR_POS);
- SPKR_PORT |= (1 << SPKR_POS);
-
- // Set Power Pin (I've traced this back to the "Power On" Switch, but I don't really know what it's for)
- // Configured as a Pull-up Input - This pin "can" be read as well, it will go to GND when the "Power On" switch is pressed, and will read ~5V otherwise
- // XXX Currently not used by the controller
- POWR_DDR &= ~(1 << POWR_POS);
- POWR_PORT |= (1 << POWR_POS);
-
- // Reset the keyboard before scanning, we might be in a wierd state
- scan_resetKeyboard();
- }
-
- // Main Detection Loop
- // Not needed for the Sony NEWS, this is just a busy loop
- inline uint8_t scan_loop()
- {
- return 0;
- }
-
- void processKeyValue( uint8_t keyValue )
- {
- // Detect release condition
- uint8_t release = keyValue & 0x80;
-
- // Finalize output buffer
- // Mask 8th bit
- keyValue &= 0x7F;
-
- // Key Release
- if ( release )
- {
- // Check for the released key, and shift the other keys lower on the buffer
- uint8_t c;
- for ( c = 0; c < KeyIndex_BufferUsed; c++ )
- {
- // Key to release found
- if ( KeyIndex_Buffer[c] == keyValue )
- {
- // Shift keys from c position
- for ( uint8_t k = c; k < KeyIndex_BufferUsed - 1; k++ )
- KeyIndex_Buffer[k] = KeyIndex_Buffer[k + 1];
-
- // Decrement Buffer
- KeyIndex_BufferUsed--;
-
- break;
- }
- }
-
- // Error case (no key to release)
- if ( c == KeyIndex_BufferUsed + 1 )
- {
- errorLED( 1 );
- char tmpStr[6];
- hexToStr( keyValue, tmpStr );
- erro_dPrint( "Could not find key to release: ", tmpStr );
- }
- }
- // Press or Repeated Key
- else
- {
- // 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 )
- {
- bufferAdd( keyValue );
- break;
- }
-
- // Key already in the buffer
- if ( KeyIndex_Buffer[c] == keyValue )
- break;
- }
- }
- }
-
- // USART Receive Buffer Full Interrupt
- ISR(USART1_RX_vect)
- {
- cli(); // Disable Interrupts
-
- uint8_t keyValue = 0x00;
-
- // One scancode at a time (fastest interval ~3.95 ms - recorded, should still be ok for interrupt polling)
- // Read the raw packet from the USART
- keyValue = UDR1;
-
- // Debug
- char tmpStr[6];
- hexToStr( keyValue, tmpStr );
- dPrintStrs( tmpStr, " " );
-
- // Process the scancode
- if ( keyValue != 0x00 )
- processKeyValue( keyValue );
-
- sei(); // Re-enable Interrupts
- }
-
- // Send data to keyboard
- uint8_t scan_sendData( uint8_t dataPayload )
- {
- // Debug
- char tmpStr[6];
- hexToStr( dataPayload, tmpStr );
- info_dPrint( tmpStr, " " );
-
- UDR1 = dataPayload;
- return 0;
- }
-
- // Signal KeyIndex_Buffer that it has been properly read
- // Not needed as a signal is sent to remove key-presses
- void scan_finishedWithBuffer( uint8_t sentKeys )
- {
- return;
- }
-
- // Reset/Hold keyboard TODO
- // Warning! This will cause the keyboard to not send any data, so you can't disable with a keypress
- void scan_lockKeyboard( void )
- {
- }
-
- void scan_unlockKeyboard( void )
- {
- }
-
- // Reset Keyboard
- void scan_resetKeyboard( void )
- {
- // Empty buffer, now that keyboard has been reset
- KeyIndex_BufferUsed = 0;
- }
-
- void scan_finishedWithUSBBuffer( uint8_t sentKeys )
- {
- return;
- }
-
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