473e3359f4
- I won't do any more, as I can't make the converter fully functional on a modern computer - Basic typing support is working - Some of the function modes move around the ASCII values, and this takes a while to decipher and figure out the pattern; it's not hard to do, and I don't really feel like doing it - The hard part is already done :P
386 lines
9.3 KiB
C
386 lines
9.3 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 keyValue = 0x00;
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#if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_) // AVR
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keyValue = 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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keyValue = 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( keyValue, tmpStr );
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dPrintStrs( tmpStr, " " ); // Debug
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// Decipher scan value
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processKeyValue( keyValue );
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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, and RX Complete Interrupt
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UCSR1B = 0x90;
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// Set frame format: 8 data, 1 stop bit, even parity
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// Asynchrounous USART mode
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UCSR1C = 0x26;
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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_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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return 0;
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}
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void processKeyValue( uint8_t keyValue )
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{
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// XXX NOTE: The key processing is not complete for this keyboard
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// Mostly due to laziness, and that the keyboard can't really be useful on a modern computer
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// Basic typing will work, but some of the keys and the Graph mode changes things around
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// Add key(s) to processing buffer
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// First split out Shift and Ctrl
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// Reserved Codes:
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// Shift - 0xF5
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// Ctrl - 0xF6
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switch ( keyValue )
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{
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// - Ctrl Keys -
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// Exception keys
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case 0x08: // ^H
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case 0x09: // ^I
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case 0x0D: // ^M
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case 0x1B: // ^[
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bufferAdd( keyValue );
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break;
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// 0x40 Offset Keys
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// Add Ctrl key and offset to the lower alphabet
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case 0x00: // ^@
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case 0x1C: // "^\"
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case 0x1D: // ^]
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case 0x1E: // ^^
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case 0x1F: // ^_
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bufferAdd( 0xF6 );
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bufferAdd( keyValue + 0x40 );
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break;
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// - Add Shift key and offset to non-shifted key -
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// 0x10 Offset Keys
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case 0x21: // !
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case 0x23: // #
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case 0x24: // $
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case 0x25: // %
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bufferAdd( 0xF5 );
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bufferAdd( keyValue + 0x10 );
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break;
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// 0x11 Offset Keys
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case 0x26: // &
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case 0x28: // (
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bufferAdd( 0xF5 );
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bufferAdd( keyValue + 0x11 );
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break;
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// 0x07 Offset Keys
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case 0x29: // )
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bufferAdd( 0xF5 );
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bufferAdd( keyValue + 0x07 );
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break;
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// -0x0E Offset Keys
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case 0x40: // @
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bufferAdd( 0xF5 );
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bufferAdd( keyValue - 0x0E );
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break;
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// 0x0E Offset Keys
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case 0x2A: // *
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bufferAdd( 0xF5 );
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bufferAdd( keyValue + 0x0E );
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break;
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// 0x12 Offset Keys
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case 0x2B: // +
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bufferAdd( 0xF5 );
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bufferAdd( keyValue + 0x12 );
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break;
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// 0x05 Offset Keys
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case 0x22: // "
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bufferAdd( 0xF5 );
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bufferAdd( keyValue + 0x05 );
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break;
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// 0x01 Offset Keys
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case 0x3A: // :
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bufferAdd( 0xF5 );
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bufferAdd( keyValue + 0x01 );
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break;
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// -0x10 Offset Keys
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case 0x3C: // <
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case 0x3E: // >
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case 0x3F: // ?
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bufferAdd( 0xF5 );
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bufferAdd( keyValue - 0x10 );
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break;
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// -0x28 Offset Keys
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case 0x5E: // ^
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bufferAdd( 0xF5 );
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bufferAdd( keyValue - 0x28 );
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break;
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// -0x32 Offset Keys
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case 0x5F: // _
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bufferAdd( 0xF5 );
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bufferAdd( keyValue - 0x32 );
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break;
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// -0x20 Offset Keys
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case 0x7B: // {
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case 0x7C: // |
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case 0x7D: // }
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bufferAdd( 0xF5 );
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bufferAdd( keyValue - 0x20 );
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break;
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// -0x1E Offset Keys
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case 0x7E: // ~
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bufferAdd( 0xF5 );
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bufferAdd( keyValue - 0x1E );
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break;
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// All other keys
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default:
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// Ctrl Characters are from 0x00 to 0x1F, excluding:
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// 0x08 - Backspace
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// 0x09 - [Horizontal] Tab
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// 0x0D - [Carriage] Return
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// 0x1B - Escape
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// 0x7F - Delete (^?) (Doesn't need to be split out)
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// 0x60 Offset Keys
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// Add Ctrl key and offset to the lower alphabet
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if ( keyValue >= 0x00 && keyValue <= 0x1F )
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{
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bufferAdd( 0xF6 );
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bufferAdd( keyValue + 0x60 );
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}
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// Shift Characters are from 0x41 to 0x59
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// No exceptions here :D
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// Add Shift key and offset to the lower alphabet
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else if ( keyValue >= 0x41 && keyValue <= 0x5A )
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{
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bufferAdd( 0xF5 );
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bufferAdd( keyValue + 0x20 );
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}
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// Everything else
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else
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{
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bufferAdd( keyValue );
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}
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break;
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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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cli(); // Disable Interrupts
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// Reset the buffer counter
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KeyIndex_BufferUsed = 0;
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sei(); // Re-enable Interrupts
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}
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// Reset/Hold keyboard
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// NOTE: Does nothing with the MBC-55x
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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 MBC-55x
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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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