/* Copyright (C) 2012,2014,2016 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 #include #include #include // Local Includes #include "scan_loop.h" // ----- Defines ----- // Pinout Defines #define HOLD_PORT PORTD #define HOLD_DDR DDRD #define HOLD_PIN 3 // ----- Macros ----- // ----- Enums ----- // Keypress States typedef enum KeyPosition { KeyState_Off = 0, KeyState_Press = 1, KeyState_Hold = 2, KeyState_Release = 3, KeyState_Invalid, } KeyPosition; // ----- 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; volatile uint8_t KeyIndex_Add_InputSignal; // Used to pass the (click/input value) to the keyboard for the clicker // Buffer Signals volatile uint8_t BufferReadyToClear; // ----- Function Declarations ----- void processKeyValue( uint8_t keyValue ); void removeKeyValue( uint8_t keyValue ); // ----- Interrupt Functions ----- // USART Receive Buffer Full Interrupt #if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_) // AVR ISR(USART1_RX_vect) #elif defined(_mk20dx128_) || defined(_mk20dx256_) // ARM void uart0_status_isr() #endif { cli(); // Disable Interrupts uint8_t keyValue = 0x00; uint8_t keyState = 0x00; #if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_) // AVR // Read the scancode packet from the USART (1st to 8th bits) keyValue = UDR1; // Read the release/press bit (9th bit) XXX Unnecessary, and wrong it seems, parity bit? or something else? keyState = UCSR1B & 0x02; #elif defined(_mk20dx128_) || defined(_mk20dx256_) // ARM // UART0_S1 must be read for the interrupt to be cleared if ( UART0_S1 & UART_S1_RDRF ) { // Only doing single byte FIFO here keyValue = UART0_D; } #endif // High bit of keyValue, also represents press/release keyState = keyValue & 0x80 ? 0x00 : 0x02; // Debug char tmpStr[6]; hexToStr( keyValue & 0x7F, tmpStr ); // Process the scancode switch ( keyState ) { case 0x00: // Released dPrintStrs( tmpStr, "R " ); // Debug break; case 0x02: // Pressed dPrintStrs( tmpStr, "P " ); // Debug break; } // Add key event to macro key buffer TriggerGuide guide = { .type = 0x00, .state = keyState == 0x02 ? 0x01 : 0x03, .scanCode = keyValue & 0x7F, }; Macro_pressReleaseAdd( &guide ); 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 // NOTE: The input data signal needs to be inverted for the Teensy USART to properly work // Setup baud rate // 16 MHz / ( 16 * Baud ) = UBRR // Baud <- 0.823284 ms per bit, thus 1000 / 0.823284 = 1214.65004 -> 823.2824 // Thus baud setting = 823 uint16_t baud = 823; // Max setting of 4095 UBRR1H = (uint8_t)(baud >> 8); UBRR1L = (uint8_t)baud; // Enable the receiver, and RX Complete Interrupt as well as 9 bit data UCSR1B = 0x94; // The transmitter is only to be enabled when needed // Set the pin to be pull-up otherwise (use the lowered voltage inverter in order to sink) HOLD_DDR &= ~(1 << HOLD_PIN); HOLD_PORT |= (1 << HOLD_PIN); // Set frame format: 9 data, 1 stop bit, no parity // Asynchrounous USART mode UCSR1C = 0x06; // Initially buffer doesn't need to be cleared (it's empty...) BufferReadyToClear = 0; // InputSignal is off by default KeyIndex_Add_InputSignal = 0x00; // Reset the keyboard before scanning, we might be in a wierd state scan_resetKeyboard(); } #elif defined(_mk20dx128_) || defined(_mk20dx256_) // 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: 1215 -> 48 MHz / ( 16 * 1215 ) = 2469.1358 // Thus baud setting = 2469 // NOTE: If finer baud adjustment is needed see UARTx_C4 -> BRFA in the datasheet uint16_t baud = 2469; // Max setting of 8191 UART0_BDH = (uint8_t)(baud >> 8); UART0_BDL = (uint8_t)baud; // 8 bit, Even Parity, Idle Character bit after stop // NOTE: For 8 bit with Parity you must enable 9 bit transmission (pg. 1065) // You only need to use UART0_D for 8 bit reading/writing though // UART_C1_M UART_C1_PE UART_C1_PT UART_C1_ILT UART0_C1 = UART_C1_M | UART_C1_PE | 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); // Reciever Inversion Disabled, LSBF // UART_S2_RXINV UART_S2_MSBF UART0_S2 |= 0x00; // Transmit Inversion Disabled // UART_C3_TXINV UART0_C3 |= 0x00; // TX Disabled, RX Enabled, RX Interrupt Enabled // UART_C2_TE UART_C2_RE UART_C2_RIE UART0_C2 = UART_C2_RE | UART_C2_RIE | UART_C2_TE; // 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 // Not needed for the BETKB, this is just a busy loop inline uint8_t Scan_loop() { return 0; } // Send data uint8_t scan_sendData( uint8_t dataPayload ) { #if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_) // AVR // Enable the USART Transmitter UCSR1B |= (1 << 3); #elif defined(_mk20dx128_) || defined(_mk20dx256_) // ARM #endif // 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_) || defined(_mk20dx256_) // ARM UART0_D = dataPayload; #endif // Wait for the payload _delay_us( 800 ); #if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_) // AVR // Disable the USART Transmitter UCSR1B &= ~(1 << 3); #elif defined(_mk20dx128_) || defined(_mk20dx256_) // ARM #endif return 0; } // Signal KeyIndex_Buffer that it has been properly read void Scan_finishedWithMacro( uint8_t sentKeys ) { } // Signal that the keys have been properly sent over USB void Scan_finishedWithOutput( uint8_t sentKeys ) { } // Reset/Hold keyboard // NOTE: Does nothing with the BETKB void Scan_lockKeyboard() { } // NOTE: Does nothing with the BETKB void Scan_unlockKeyboard() { } // Reset Keyboard void Scan_resetKeyboard() { // Not a calculated valued... _delay_ms( 50 ); } // NOTE: Does nothing with the BETKB void Scan_currentChange( unsigned int current ) { }