Mercurial > louis > kiibohd-controller

annotate Scan/MicroSwitch8304/scan_loop.c @ 308:ab4515606277

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Fix whitespace Use a consistent standard - Tabs in front for indenting, spaces after for anything else. This way everything stays nice and lined up while also letting users change there prefered indent level. Most of the new files from Haata where already in this format.
author Rowan Decker <Smasher816@gmail.com>
date Sun, 08 Mar 2015 18:40:01 -0700
parents 8dab4014c398
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /* Copyright (C) 2011,2014 by Jacob Alexander
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2 *
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3 * Permission is hereby granted, free of charge, to any person obtaining a copy
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4 * of this software and associated documentation files (the "Software"), to deal
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5 * in the Software without restriction, including without limitation the rights
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6 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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7 * copies of the Software, and to permit persons to whom the Software is
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8 * furnished to do so, subject to the following conditions:
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9 *
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10 * The above copyright notice and this permission notice shall be included in
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11 * all copies or substantial portions of the Software.
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12 *
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13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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18 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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19 * THE SOFTWARE.
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20 */
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21
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22 // ----- Includes -----
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23
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24 // Compiler Includes
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25 #include <Lib/ScanLib.h>
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26
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27 // Project Includes
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28 #include <led.h>
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29 #include <print.h>
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30
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31 // Local Includes
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32 #include "scan_loop.h"
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36 // ----- Defines -----
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37
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38 // Pinout Defines
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39 #define RESET_PORT PORTB
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40 #define RESET_DDR DDRD
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41 #define RESET_PIN 0
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43
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44 // ----- Macros -----
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45
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46 #define UNSET_RESET() RESET_DDR &= ~(1 << RESET_PIN)
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47 #define SET_RESET() RESET_DDR |= (1 << RESET_PIN)
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51 // ----- Variables -----
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52
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53 // Buffer used to inform the macro processing module which keys have been detected as pressed
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54 volatile uint8_t KeyIndex_Buffer[KEYBOARD_BUFFER];
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55 volatile uint8_t KeyIndex_BufferUsed;
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58 // Buffer Signals
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59 volatile uint8_t BufferReadyToClear;
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63 // ----- Functions -----
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64
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65 // Setup
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66 inline void Scan_setup()
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67 {
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68 // Setup the the USART interface for keyboard data input
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69 // NOTE: The input data signal needs to be inverted for the Teensy USART to properly work
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70
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71 // Setup baud rate
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72 // 16 MHz / ( 16 * Baud ) = UBRR
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73 // Baud <- 0.82020 ms per bit, thus 1000 / 0.82020 = 1219.2
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74 // Thus baud setting = 820
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75 uint16_t baud = 820; // Max setting of 4095
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76 UBRR1H = (uint8_t)(baud >> 8);
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77 UBRR1L = (uint8_t)baud;
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78
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79 // Enable the receiver, transitter, and RX Complete Interrupt
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80 UCSR1B = 0x98;
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81
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82 // Set frame format: 8 data, no stop bits or parity
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83 // Asynchrounous USART mode
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84 // 8304 sends encoded scancodes (for example Alphanumeric 0-9 follows their keypad encoding scheme)
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85 // Separate line is for reset
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86 UCSR1C = 0x06;
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87
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88 // Initially buffer doesn't need to be cleared (it's empty...)
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89 BufferReadyToClear = 0;
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90
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91 // Reset the keyboard before scanning, we might be in a wierd state
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92 // Note: This should be run asap, but we need the USART setup to run this command on the 8304
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93 scan_resetKeyboard();
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94 }
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96
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97 // Main Detection Loop
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98 // Not needed for the Micro Switch 8304, this is just a busy loop
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99 inline uint8_t Scan_loop()
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100 {
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101 return 0;
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102 }
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103
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104 void processKeyValue( uint8_t keyValue )
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105 {
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106 // Finalize output buffer
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107 // Mask 8th bit
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108 keyValue &= 0x7F;
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109
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110 // Interpret scan code
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111 switch ( keyValue )
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112 {
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113 case 0x40: // Clear buffer command
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114 info_print("CLEAR!");
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115
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116 BufferReadyToClear = 1;
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117 break;
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118 case 0x7F:
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119 scan_lockKeyboard();
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120 _delay_ms(3000);
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121 scan_unlockKeyboard();
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122
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123 default:
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124 // Make sure the key isn't already in the buffer
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125 for ( uint8_t c = 0; c < KeyIndex_BufferUsed + 1; c++ )
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126 {
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127 // Key isn't in the buffer yet
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128 if ( c == KeyIndex_BufferUsed )
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129 {
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130 Macro_bufferAdd( keyValue );
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131 break;
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132 }
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133
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134 // Key already in the buffer
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135 if ( KeyIndex_Buffer[c] == keyValue )
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136 break;
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137 }
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138 break;
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139 }
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140 }
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141
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142 // USART Receive Buffer Full Interrupt
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143 ISR(USART1_RX_vect)
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144 {
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145 cli(); // Disable Interrupts
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146
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147 uint8_t keyValue = 0x00;
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148
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149 // The interrupt is always for the first item of the packet set, reset the buffer
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150 KeyIndex_BufferUsed = 0;
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151
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152 // Only the first 7 bits have scancode data
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153 // The last packet of the packet set has the 8th bit high, all the others are low
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154 //
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155 // Interrupts are too slow for the rest of the packet set, poll for the rest
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156 while ( 1 )
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157 {
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158 // Read the raw packet from the USART
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159 keyValue = UDR1;
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160
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161 // Debug
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162 char tmpStr[6];
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163 hexToStr( keyValue, tmpStr );
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164 dPrintStrs( tmpStr, " " );
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165
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166 // Process the scancode
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167 processKeyValue( keyValue );
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168
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169 // Last packet of the set
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170 if ( keyValue & 0x80 )
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171 {
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172 dPrintStrs( "**" );
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173 break;
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174 }
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175
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176 // Delay enough so we don't run into the same packet (or the previous buffered packet)
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177 _delay_us(10000);
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178 }
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179
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180 sei(); // Re-enable Interrupts
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181 }
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182
308
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183 // Send data
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184 //
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185 // Keyboard Input Guide for Micro Switch 8304
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186 // 0xBX is for LED F1,F2,Over Type,Lock
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187 // 0xAX is for LED F3,F8,F9,F10
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188 // 0x92 resets keyboard (LED off, echo scancode mode off)
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189 // 0x9E sets echo scancode mode from (0x81 to 0xFF; translates to 0x01 to 0x7F)
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190 // Other echos: 0x15~0x19 send 0x15~0x19, 0x40 sends 0x40 (as well as 0x44,0x45, 0x80)
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191 // 0x8C Acks the keyboard and gets 0x70 sent back (delayed)
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192 uint8_t Scan_sendData( uint8_t dataPayload )
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193 {
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194 UDR1 = dataPayload;
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195 return 0;
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196 }
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197
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198 // Signal KeyIndex_Buffer that it has been properly read
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199 // In the case of the Micro Switch 8304, we leave the buffer alone until more scancode data comes in
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200 void Scan_finishedWithBuffer( uint8_t sentKeys )
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201 {
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202 // We received a Clear code from the 8304, clear the buffer now that we've used it
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203 if ( BufferReadyToClear )
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204 {
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205 KeyIndex_BufferUsed = 0;
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206 BufferReadyToClear = 0;
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207 }
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208 }
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209
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210 // Signal that the keys have been properly sent over USB
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211 void Scan_finishedWithUSBBuffer( uint8_t sentKeys )
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212 {
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213 }
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214
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215 // Reset/Hold keyboard
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216 // Warning! This will cause the keyboard to not send any data, so you can't disable with a keypress
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217 // The Micro Switch 8304 has a dedicated reset line
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218 void Scan_lockKeyboard( void )
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219 {
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220 UNSET_RESET();
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221 }
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222
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223 void Scan_unlockKeyboard( void )
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224 {
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225 SET_RESET();
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226 }
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227
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228 // Reset Keyboard
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229 void Scan_resetKeyboard( void )
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230 {
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231 // Reset command for the 8304
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232 scan_sendData( 0x92 );
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233 }
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234