/* Copyright (C) 2011 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 ----- // AVR Includes #include #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 ----- volatile uint8_t KeyIndex_Buffer[KEYBOARD_BUFFER]; volatile uint8_t KeyIndex_BufferUsed; // Known signals static uint8_t cmd_clickOFF = 0x0A; // Short beep, turns off clicker static uint8_t cmd_clickON = 0x04; // Long beep, turns on clicker static uint8_t cmd_ACK_AA = 0x10; // Keyboard will send ack (0xAA) back to PC // Other known signals // 0x02 turns on clicker but with short beep // ----- Functions ----- // Setup inline void scan_setup() { // Setup the the USART interface for keyboard data input // Setup baud rate // 16 MHz / ( 16 * Baud ) = UBRR // Baud <- 3.358 ms per bit, thus 1000 / 3.358 = 297.80 // Thus baud = 3357 uint16_t baud = 3357; // Max setting of 4095 UBRR1H = (uint8_t)(baud >> 8); UBRR1L = (uint8_t)baud; // Enable the receiver, transitter, and RX Complete Interrupt UCSR1B = 0x98; // Set frame format: 8 data, no stop bits or parity // Asynchrounous USART mode // Kaypro sends ASCII codes (mostly standard) with 1 start bit and 8 data bits, with no trailing stop or parity bits UCSR1C = 0x06; } // Main Detection Loop // Nothing is needed here for the Kaypro, but the function is available as part of the api to be called in a polling fashion // TODO // - Add songs :D inline uint8_t scan_loop() { // We *could* do extra offline processing here, but, it's not really needed for the Kaypro 1 keyboard return 0; } // USART Receive Buffer Full Interrupt ISR(USART1_RX_vect) { cli(); // Disable Interrupts // Get key from USART uint8_t keyValue = UDR1; //#ifdef MAX_DEBUG // Debug print key char tmpStr1[6]; hexToStr( keyValue, tmpStr1 ); dPrintStrs( tmpStr1, " " ); //#endif // Add key(s) to processing buffer // First split out Shift and Ctrl // Reserved Codes: // Shift - 0xF5 // Ctrl - 0xF6 switch ( keyValue ) { // - Ctrl Keys - // Exception keys case 0x08: // ^H case 0x09: // ^I case 0x0D: // ^M case 0x1B: // ^[ bufferAdd( keyValue ); break; // 0x40 Offset Keys // Add Ctrl key and offset to the lower alphabet case 0x00: // ^@ case 0x1C: // "^\" case 0x1D: // ^] case 0x1E: // ^^ case 0x1F: // ^_ bufferAdd( 0xF6 ); bufferAdd( keyValue + 0x40 ); break; // - Add Shift key and offset to non-shifted key - // 0x10 Offset Keys case 0x21: // ! case 0x23: // # case 0x24: // $ case 0x25: // % bufferAdd( 0xF5 ); bufferAdd( keyValue + 0x10 ); break; // 0x11 Offset Keys case 0x26: // & case 0x28: // ( bufferAdd( 0xF5 ); bufferAdd( keyValue + 0x11 ); break; // 0x07 Offset Keys case 0x29: // ) bufferAdd( 0xF5 ); bufferAdd( keyValue + 0x07 ); break; // -0x0E Offset Keys case 0x40: // @ bufferAdd( 0xF5 ); bufferAdd( keyValue - 0x0E ); break; // 0x0E Offset Keys case 0x2A: // * bufferAdd( 0xF5 ); bufferAdd( keyValue + 0x0E ); break; // 0x12 Offset Keys case 0x2B: // + bufferAdd( 0xF5 ); bufferAdd( keyValue + 0x12 ); break; // 0x05 Offset Keys case 0x22: // " bufferAdd( 0xF5 ); bufferAdd( keyValue + 0x05 ); break; // 0x01 Offset Keys case 0x3A: // : bufferAdd( 0xF5 ); bufferAdd( keyValue + 0x01 ); break; // -0x10 Offset Keys case 0x3C: // < case 0x3E: // > case 0x3F: // ? bufferAdd( 0xF5 ); bufferAdd( keyValue - 0x10 ); break; // -0x28 Offset Keys case 0x5E: // ^ bufferAdd( 0xF5 ); bufferAdd( keyValue - 0x28 ); break; // -0x32 Offset Keys case 0x5F: // _ bufferAdd( 0xF5 ); bufferAdd( keyValue - 0x32 ); break; // -0x20 Offset Keys case 0x7B: // { case 0x7C: // | case 0x7D: // } bufferAdd( 0xF5 ); bufferAdd( keyValue - 0x20 ); break; // -0x1E Offset Keys case 0x7E: // ~ bufferAdd( 0xF5 ); bufferAdd( keyValue - 0x1E ); break; // All other keys default: // Ctrl Characters are from 0x00 to 0x1F, excluding: // 0x08 - Backspace // 0x09 - [Horizontal] Tab // 0x0D - [Carriage] Return // 0x1B - Escape // 0x7F - Delete (^?) (Doesn't need to be split out) // 0x60 Offset Keys // Add Ctrl key and offset to the lower alphabet if ( keyValue >= 0x00 && keyValue <= 0x1F ) { bufferAdd( 0xF6 ); bufferAdd( keyValue + 0x60 ); } // Shift Characters are from 0x41 to 0x59 // No exceptions here :D // Add Shift key and offset to the lower alphabet else if ( keyValue >= 0x41 && keyValue <= 0x5A ) { bufferAdd( 0xF5 ); bufferAdd( keyValue + 0x20 ); } // Everything else else { bufferAdd( keyValue ); } break; } // Special keys - For communication to the keyboard // TODO Try to push this functionality into the macros...somehow switch ( keyValue ) { case 0xC3: // Keypad Enter print("\n"); info_print("BEEEEP! - Clicker on"); UDR1 = cmd_clickON; break; case 0xB2: // Keypad Decimal print("\n"); info_print("BEEP! - Clicker off"); UDR1 = cmd_clickOFF; break; case 0x0A: // Line Feed print("\n"); info_print("ACK!!"); UDR1 = cmd_ACK_AA; break; } sei(); // Re-enable Interrupts }