Mercurial > louis > kiibohd-controller

annotate main.c @ 72:4c2712f25157

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Main USB timer now working, basic Teensy 3 support working. - No scan modules are functional yet, but all of the API code is now "hardware support" complete
author Jacob Alexander <triplehaata@gmail.com>
date Wed, 30 Jan 2013 19:20:42 -0500
parents 23600aaa5e15
children 3764d78996a8
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1 /* Copyright (C) 2011-2013 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/MainLib.h>
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26
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27 // Project Includes
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28 #include <macro.h>
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29 #include <scan_loop.h>
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30 #include <usb_com.h>
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31
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32 #include <led.h>
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33 #include <print.h>
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36
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37 // ----- Defines -----
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39 // Verified Keypress Defines
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40 #define USB_TRANSFER_DIVIDER 10 // 1024 == 1 Send of keypresses per second, 1 == 1 Send of keypresses per ~1 millisecond
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44 // ----- Macros -----
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45 #if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_)
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46 #define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
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47 #endif
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50
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51 // ----- Variables -----
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52
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53 // Timer Interrupt for flagging a send of the sampled key detection data to the USB host
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54 uint16_t sendKeypressCounter = 0;
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55
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56 // Flag generated by the timer interrupt
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57 volatile uint8_t sendKeypresses = 0;
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61 // ----- Functions -----
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62
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63 // Initial Pin Setup, make sure they are sane
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64 inline void pinSetup(void)
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65 {
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67 // AVR
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68 #if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_)
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69
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70 // For each pin, 0=input, 1=output
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71 #if defined(__AVR_AT90USB1286__)
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72 DDRA = 0x00;
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73 #endif
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74 DDRB = 0x00;
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75 DDRC = 0x00;
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76 DDRD = 0x00;
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77 DDRE = 0x00;
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78 DDRF = 0x00;
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80
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81 // Setting pins to either high or pull-up resistor
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82 #if defined(__AVR_AT90USB1286__)
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83 PORTA = 0x00;
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84 #endif
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85 PORTB = 0x00;
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86 PORTC = 0x00;
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87 PORTD = 0x00;
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88 PORTE = 0x00;
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89 PORTF = 0x00;
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90
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91 // ARM
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92 #elif defined(_mk20dx128_)
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93 // TODO - Should be cleared, but not that necessary due to the pin layout
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94 #endif
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95 }
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96
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98 inline void usbTimerSetup(void)
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99 {
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100 // AVR
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101 #if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_)
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102
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103 // Setup with 16 MHz clock
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104 CPU_PRESCALE( 0 );
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105
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106 // Setup ISR Timer for flagging a kepress send to USB
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107 // Set to 256 * 1024 (8 bit timer with Clock/1024 prescalar) timer
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108 TCCR0A = 0x00;
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109 TCCR0B = 0x03;
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110 TIMSK0 = (1 << TOIE0);
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111
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112 // ARM
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113 #elif defined(_mk20dx128_)
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114 // 48 MHz clock by default
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115
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116 // System Clock Gating Register Disable
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117 SIM_SCGC6 |= SIM_SCGC6_PIT;
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118
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119 // Enable Timers
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120 PIT_MCR = 0x00;
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121
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122 // Setup ISR Timer for flagging a kepress send to USB
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123 // 1 ms / (1 / 48 MHz) - 1 = 47999 cycles -> 0xBB7F
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124 PIT_LDVAL0 = 0x0000BB7F;
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125 PIT_TCTRL0 = 0x3; // Enable Timer 0 interrupts, and Enable Timer 0
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126
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127 // Insert the required vector for Timer 0
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128 NVIC_ENABLE_IRQ( IRQ_PIT_CH0 );
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129 #endif
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130 }
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131
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132
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133 int main(void)
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134 {
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135 // Configuring Pins
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136 pinSetup();
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137 init_errorLED();
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138
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139 // Setup USB Module
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140 usb_setup();
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141
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142 // Setup ISR Timer for flagging a kepress send to USB
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143 usbTimerSetup();
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144
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145 // Main Detection Loop
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146 uint8_t ledTimer = F_CPU / 1000000; // Enable LED for a short time
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147 while ( 1 )
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148 {
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149 // Setup the scanning module
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150 scan_setup();
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151
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152 while ( 1 )
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153 {
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154 // Acquire Key Indices
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155 // Loop continuously until scan_loop returns 0
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156 cli();
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157 while ( scan_loop() );
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158 sei();
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159
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160 // Run Macros over Key Indices and convert to USB Keys
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161 process_macros();
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162
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163 // Send keypresses over USB if the ISR has signalled that it's time
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164 if ( !sendKeypresses )
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165 continue;
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166
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167 // Send USB Data
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168 usb_send();
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169
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170 // Clear sendKeypresses Flag
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171 sendKeypresses = 0;
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172
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173 // Indicate Error, if valid
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174 errorLED( ledTimer );
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175
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176 if ( ledTimer > 0 )
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177 ledTimer--;
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178 }
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179
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180 // Loop should never get here (indicate error)
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181 ledTimer = 255;
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182
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183 // HID Debug Error message
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184 erro_print("Detection loop error, this is very bad...bug report!");
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185 }
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186 }
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187
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188
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189 // ----- Interrupts -----
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190
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191 // USB Keyboard Data Send Counter Interrupt
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192 #if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_) // AVR
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193 ISR( TIMER0_OVF_vect )
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194 #elif defined(_mk20dx128_) // ARM
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195 void pit0_isr(void)
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196 #endif
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197 {
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198 sendKeypressCounter++;
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199 if ( sendKeypressCounter > USB_TRANSFER_DIVIDER ) {
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200 sendKeypressCounter = 0;
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201 sendKeypresses = 1;
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202 }
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203
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204 #if defined(_mk20dx128_) // ARM
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205 // Clear the interrupt flag
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206 PIT_TFLG0 = 1;
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207 #endif
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208 }
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209