--- /dev/null
+/* 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 -----
+
+// AVR Includes
+#include <avr/interrupt.h>
+#include <avr/io.h>
+#include <util/delay.h>
+
+// Project Includes
+#include <led.h>
+#include <print.h>
+
+// Local Includes
+#include "scan_loop.h"
+
+
+
+// ----- Defines -----
+
+// Pinout Defines
+#define RESET_PORT PORTB
+#define RESET_DDR DDRD
+#define RESET_PIN 0
+
+
+// ----- Macros -----
+
+// Make sure we haven't overflowed the buffer
+#define bufferAdd(byte) \
+ if ( KeyIndex_BufferUsed < KEYBOARD_BUFFER ) \
+ KeyIndex_Buffer[KeyIndex_BufferUsed++] = byte
+
+#define UNSET_RESET() RESET_DDR &= ~(1 << RESET_PIN)
+#define SET_RESET() RESET_DDR |= (1 << RESET_PIN)
+
+
+
+// ----- 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;
+
+ // 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 Repeat Rate
+ 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
+ processKeyValue( keyValue );
+
+ sei(); // Re-enable Interrupts
+}
+
+// Send data TODO
+//
+// Keyboard Input Guide for Micro Switch 8304
+// 0xBX is for LED F1,F2,Over Type,Lock
+// 0xAX is for LED F3,F8,F9,F10
+// 0x92 resets keyboard (LED off, echo scancode mode off)
+// 0x9E sets echo scancode mode from (0x81 to 0xFF; translates to 0x01 to 0x7F)
+// Other echos: 0x15~0x19 send 0x15~0x19, 0x40 sends 0x40 (as well as 0x44,0x45, 0x80)
+// 0x8C Acks the keyboard and gets 0x70 sent back (delayed)
+uint8_t scan_sendData( uint8_t dataPayload )
+{
+ 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( void )
+{
+ return;
+}
+
+// Reset/Hold keyboard TODO
+// Warning! This will cause the keyboard to not send any data, so you can't disable with a keypress
+// The Micro Switch 8304 has a dedicated reset line
+void scan_lockKeyboard( void )
+{
+ //UNSET_RESET();
+}
+
+void scan_unlockKeyboard( void )
+{
+ //SET_RESET();
+}
+
+// Reset Keyboard TODO
+void scan_resetKeyboard( void )
+{
+ // Reset command for the 8304
+ //scan_sendData( 0x92 );
+
+ // Empty buffer, now that keyboard has been reset
+ KeyIndex_BufferUsed = 0;
+}
+
projects / kiibohd-controller.git / blobdiff