/* 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 // Project Includes #include #include // 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; }