294 lines
7.3 KiB
C
294 lines
7.3 KiB
C
/* Copyright (C) 2013 by Jacob Alexander
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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// ----- Includes -----
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// Compiler Includes
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#include <Lib/ScanLib.h>
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// Project Includes
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#include <led.h>
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#include <print.h>
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// Local Includes
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#include "scan_loop.h"
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// ----- Defines -----
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// ----- Macros -----
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// Make sure we haven't overflowed the buffer
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#define bufferAdd(byte) \
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if ( KeyIndex_BufferUsed < KEYBOARD_BUFFER ) \
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KeyIndex_Buffer[KeyIndex_BufferUsed++] = byte
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// ----- Variables -----
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// Buffer used to inform the macro processing module which keys have been detected as pressed
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volatile uint8_t KeyIndex_Buffer[KEYBOARD_BUFFER];
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volatile uint8_t KeyIndex_BufferUsed;
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// ----- Function Declarations -----
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void processKeyValue( uint8_t valueType );
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void removeKeyValue( uint8_t keyValue );
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// ----- Interrupt Functions -----
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// UART Receive Buffer Full Interrupt
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#if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_) // AVR
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ISR(USART1_RX_vect)
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#elif defined(_mk20dx128_) // ARM
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void uart0_status_isr(void)
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#endif
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{
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cli(); // Disable Interrupts
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// Variable for UART data read
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uint8_t tmp = 0x00;
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#if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_) // AVR
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tmp = UDR1;
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#elif defined(_mk20dx128_) // ARM
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// UART0_S1 must be read for the interrupt to be cleared
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if ( UART0_S1 & UART_S1_RDRF )
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{
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// Only doing single byte FIFO here
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tmp = UART0_D;
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}
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#endif
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// Debug
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char tmpStr[6];
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hexToStr( tmp, tmpStr );
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dPrintStrs( tmpStr, " " ); // Debug
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// TODO
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sei(); // Re-enable Interrupts
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}
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// ----- Functions -----
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// Setup
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inline void scan_setup()
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#if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_) // AVR
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{
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// Setup the the USART interface for keyboard data input
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// Setup baud rate - 1205 Baud
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// 16 MHz / ( 16 * Baud ) = UBRR
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// Baud: 1205 -> 16 MHz / ( 16 * 1205 ) = 829.8755
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// Thus baud setting = 830
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uint16_t baud = 830; // Max setting of 4095
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UBRR1H = (uint8_t)(baud >> 8);
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UBRR1L = (uint8_t)baud;
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// Enable the receiver, transmitter, and RX Complete Interrupt
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// TODO - Only receiver, and rx interrupt
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UCSR1B = 0x98;
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// Set frame format: 8 data, 1 stop bit, odd parity
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// Asynchrounous USART mode
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// TODO - Even parity
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UCSR1C = 0x36;
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// Reset the keyboard before scanning, we might be in a wierd state
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scan_resetKeyboard();
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}
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#elif defined(_mk20dx128_) // ARM
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{
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// Setup the the UART interface for keyboard data input
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SIM_SCGC4 |= SIM_SCGC4_UART0; // Disable clock gating
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// Pin Setup for UART0
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PORTB_PCR16 = PORT_PCR_PE | PORT_PCR_PS | PORT_PCR_PFE | PORT_PCR_MUX(3); // RX Pin
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PORTB_PCR17 = PORT_PCR_DSE | PORT_PCR_SRE | PORT_PCR_MUX(3); // TX Pin
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// Setup baud rate - 1205 Baud
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// 48 MHz / ( 16 * Baud ) = BDH/L
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// Baud: 1205 -> 48 MHz / ( 16 * 1205 ) = 2489.6266
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// Thus baud setting = 2490
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// NOTE: If finer baud adjustment is needed see UARTx_C4 -> BRFA in the datasheet
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uint16_t baud = 2490; // Max setting of 8191
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UART0_BDH = (uint8_t)(baud >> 8);
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UART0_BDL = (uint8_t)baud;
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// 8 bit, Even Parity, Idle Character bit after stop
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// NOTE: For 8 bit with Parity you must enable 9 bit transmission (pg. 1065)
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// You only need to use UART0_D for 8 bit reading/writing though
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// UART_C1_M UART_C1_PE UART_C1_PT UART_C1_ILT
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UART0_C1 = UART_C1_M | UART_C1_PE | UART_C1_ILT;
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// Number of bytes in FIFO before TX Interrupt
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UART0_TWFIFO = 1;
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// Number of bytes in FIFO before RX Interrupt
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UART0_RWFIFO = 1;
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// TX FIFO Disabled, TX FIFO Size 1 (Max 8 datawords), RX FIFO Enabled, RX FIFO Size 1 (Max 8 datawords)
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// TX/RX FIFO Size:
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// 0x0 - 1 dataword
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// 0x1 - 4 dataword
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// 0x2 - 8 dataword
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//UART0_PFIFO = UART_PFIFO_TXFE | /*TXFIFOSIZE*/ (0x0 << 4) | UART_PFIFO_RXFE | /*RXFIFOSIZE*/ (0x0);
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// Reciever Inversion Disabled, LSBF
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// UART_S2_RXINV UART_S2_MSBF
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UART0_S2 |= 0x00;
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// Transmit Inversion Disabled
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// UART_C3_TXINV
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UART0_C3 |= 0x00;
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// TX Disabled, RX Enabled, RX Interrupt Enabled
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// UART_C2_TE UART_C2_RE UART_C2_RIE
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UART0_C2 = UART_C2_TE | UART_C2_RE | UART_C2_RIE;
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// Add interrupt to the vector table
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NVIC_ENABLE_IRQ( IRQ_UART0_STATUS );
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// Reset the keyboard before scanning, we might be in a wierd state
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scan_resetKeyboard();
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}
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#endif
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// Main Detection Loop
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inline uint8_t scan_loop()
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{
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UART0_D = 0x56;
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_delay_ms( 10 );
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UART0_D = 0x1C;
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_delay_ms( 100 );
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return 0;
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}
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void processKeyValue( uint8_t keyValue )
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{
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// TODO Process ASCII
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// Make sure the key isn't already in the buffer
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for ( uint8_t c = 0; c < KeyIndex_BufferUsed + 1; c++ )
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{
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// Key isn't in the buffer yet
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if ( c == KeyIndex_BufferUsed )
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{
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bufferAdd( keyValue );
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break;
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}
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// Key already in the buffer
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if ( KeyIndex_Buffer[c] == keyValue )
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break;
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}
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}
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void removeKeyValue( uint8_t keyValue )
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{
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// Check for the released key, and shift the other keys lower on the buffer
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uint8_t c;
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for ( c = 0; c < KeyIndex_BufferUsed; c++ )
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{
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// Key to release found
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if ( KeyIndex_Buffer[c] == keyValue )
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{
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// Shift keys from c position
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for ( uint8_t k = c; k < KeyIndex_BufferUsed - 1; k++ )
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KeyIndex_Buffer[k] = KeyIndex_Buffer[k + 1];
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// Decrement Buffer
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KeyIndex_BufferUsed--;
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break;
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}
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}
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// Error case (no key to release)
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if ( c == KeyIndex_BufferUsed + 1 )
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{
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errorLED( 1 );
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char tmpStr[6];
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hexToStr( keyValue, tmpStr );
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erro_dPrint( "Could not find key to release: ", tmpStr );
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}
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}
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// Send data
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// NOTE: Example only, MBC-55X cannot receive user data
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uint8_t scan_sendData( uint8_t dataPayload )
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{
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// Debug
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char tmpStr[6];
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hexToStr( dataPayload, tmpStr );
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info_dPrint( "Sending - ", tmpStr );
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#if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_) // AVR
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UDR1 = dataPayload;
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#elif defined(_mk20dx128_) // ARM
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UART0_D = dataPayload;
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#endif
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return 0;
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}
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// Signal KeyIndex_Buffer that it has been properly read
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void scan_finishedWithBuffer( uint8_t sentKeys )
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{
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}
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// Signal that the keys have been properly sent over USB
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void scan_finishedWithUSBBuffer( uint8_t sentKeys )
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{
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}
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// Reset/Hold keyboard
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// NOTE: Does nothing with the FACOM6684
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void scan_lockKeyboard( void )
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{
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}
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// NOTE: Does nothing with the FACOM6684
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void scan_unlockKeyboard( void )
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{
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}
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// Reset Keyboard
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void scan_resetKeyboard( void )
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{
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// Not a calculated valued...
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_delay_ms( 50 );
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KeyIndex_BufferUsed = 0;
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}
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