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- /* Copyright (C) 2013 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 -----
-
-
- // ----- 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;
-
-
-
- // ----- Function Declarations -----
-
- void processKeyValue( uint8_t valueType );
- void removeKeyValue( uint8_t keyValue );
-
-
-
- // ----- Interrupt Functions -----
-
- // UART Receive Buffer Full Interrupt
- #if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_) // AVR
- ISR(USART1_RX_vect)
- #elif defined(_mk20dx128_) // ARM
- void uart0_status_isr(void)
- #endif
- {
- cli(); // Disable Interrupts
-
- // Read part of the scan code (3 8bit chunks) from USART
- #if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_) // AVR
- uint8_t tmp = UDR1;
- #elif defined(_mk20dx128_) // ARM
- // Exit out if nothing to do
- /*
- if ( !(UART0_S1 & UART_S1_RDRF ) )
- {
- sei();
- return;
- }
- */
-
- // Only doing single byte FIFO here
- uint8_t tmp = UART0_D;
- print("YAYA");
- #endif
-
- // Debug
- char tmpStr[6];
- hexToStr( tmp, tmpStr );
- dPrintStrsNL( tmpStr, " " ); // Debug
-
- // TODO
-
- sei(); // Re-enable Interrupts
- }
-
-
-
- // ----- Functions -----
-
- // Setup
- inline void scan_setup()
- #if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_) // AVR
- {
- // Setup the the USART interface for keyboard data input
-
- // Setup baud rate - 1205 Baud
- // 16 MHz / ( 16 * Baud ) = UBRR
- // Baud: 1205 -> 16 MHz / ( 16 * 1205 ) = 829.8755
- // Thus baud setting = 830
- uint16_t baud = 830; // Max setting of 4095
- UBRR1H = (uint8_t)(baud >> 8);
- UBRR1L = (uint8_t)baud;
-
- // Enable the receiver, transmitter, and RX Complete Interrupt
- // TODO - Only receiver, and rx interrupt
- UCSR1B = 0x98;
-
- // Set frame format: 8 data, 1 stop bit, odd parity
- // Asynchrounous USART mode
- // TODO - Even parity
- UCSR1C = 0x36;
-
- // Reset the keyboard before scanning, we might be in a wierd state
- scan_resetKeyboard();
- }
- #elif defined(_mk20dx128_) // ARM
- {
- // Setup the the UART interface for keyboard data input
- SIM_SCGC4 |= SIM_SCGC4_UART0; // Disable clock gating
-
- // Pin Setup for UART0
- PORTB_PCR16 = PORT_PCR_PE | PORT_PCR_PS | PORT_PCR_PFE | PORT_PCR_MUX(3); // RX Pin
- PORTB_PCR17 = PORT_PCR_DSE | PORT_PCR_SRE | PORT_PCR_MUX(3); // TX Pin
-
- // Setup baud rate - 1205 Baud
- // 48 MHz / ( 16 * Baud ) = BDH/L
- // Baud: 1205 -> 48 MHz / ( 16 * 1205 ) = 2489.6266
- // Thus baud setting = 2490
- // NOTE: If finer baud adjustment is needed see UARTx_C4 -> BRFA in the datasheet
- uint16_t baud = 2490; // Max setting of 8191
- UART0_BDH = (uint8_t)(baud >> 8);
- UART0_BDL = (uint8_t)baud;
-
- // 8 bit, Even Parity, Idle Character bit after stop
- UART0_C1 = ~UART_C1_M | UART_C1_PE | ~UART_C1_PT | UART_C1_ILT;
-
- // Number of bytes in FIFO before TX Interrupt
- UART0_TWFIFO = 1;
-
- // Number of bytes in FIFO before RX Interrupt
- UART0_RWFIFO = 1;
-
- // TX FIFO Disabled, TX FIFO Size 1 (Max 8 datawords), RX FIFO Enabled, RX FIFO Size 1 (Max 8 datawords)
- // TX/RX FIFO Size:
- // 0x0 - 1 dataword
- // 0x1 - 4 dataword
- // 0x2 - 8 dataword
- UART0_PFIFO = ~UART_PFIFO_TXFE | /*TXFIFOSIZE*/ (0x0 << 4) | ~UART_PFIFO_RXFE | /*RXFIFOSIZE*/ (0x0);
-
- // TX Disabled, RX Enabled, RX Interrupt Enabled
- UART0_C2 = UART_C2_TE | UART_C2_RE | UART_C2_RIE;
-
- // Reciever Inversion Disabled
- UART0_S2 = ~UART_S2_RXINV;
-
- // Transmit Inversion Disabled
- UART0_C3 = ~UART_S2_TXINV;
-
- // Add interrupt to the vector table
- NVIC_ENABLE_IRQ( IRQ_UART0_STATUS );
-
- // Reset the keyboard before scanning, we might be in a wierd state
- scan_resetKeyboard();
- }
- #endif
-
-
- // Main Detection Loop
- inline uint8_t scan_loop()
- {
- UART0_D = 0x56;
- _delay_ms( 100 );
- return 0;
- }
-
- void processKeyValue( uint8_t keyValue )
- {
- // TODO Process ASCII
-
- // 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;
- }
- }
-
- void removeKeyValue( uint8_t keyValue )
- {
- // 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 );
- }
- }
-
- // Send data
- // NOTE: Example only, MBC-55X cannot receive user data
- uint8_t scan_sendData( uint8_t dataPayload )
- {
- // Debug
- char tmpStr[6];
- hexToStr( dataPayload, tmpStr );
- info_dPrint( "Sending - ", tmpStr );
-
- #if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_) // AVR
- UDR1 = dataPayload;
- #elif defined(_mk20dx128_) // ARM
- UART0_D = dataPayload;
- #endif
-
- return 0;
- }
-
- // Signal KeyIndex_Buffer that it has been properly read
- void scan_finishedWithBuffer( uint8_t sentKeys )
- {
- }
-
- // Signal that the keys have been properly sent over USB
- void scan_finishedWithUSBBuffer( uint8_t sentKeys )
- {
- }
-
- // Reset/Hold keyboard
- // NOTE: Does nothing with the FACOM6684
- void scan_lockKeyboard( void )
- {
- }
-
- // NOTE: Does nothing with the FACOM6684
- void scan_unlockKeyboard( void )
- {
- }
-
- // Reset Keyboard
- void scan_resetKeyboard( void )
- {
- // Not a calculated valued...
- _delay_ms( 50 );
-
- KeyIndex_BufferUsed = 0;
- }
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