Mercurial > louis > kiibohd-controller

annotate main.c @ 174:848e1ef8966c

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McHCK now working with UART. - Lots of code cleanup for the intialization of all arm chips - Added more gcc flags to help with debugging linker and memory map - Fixed UART initialization for the smaller MCHCK mk20dx128 (different pin mux)
author Jacob Alexander <haata@kiibohd.com>
date Mon, 30 Jun 2014 23:52:24 -0700
parents 7962a42dbda0
children b250056298df
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1 /* Copyright (C) 2011-2014 by Jacob Alexander
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2 *
0
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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 *
0
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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 *
0
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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 <output_com.h>
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32 #include <cli.h>
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33 #include <led.h>
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34 #include <print.h>
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37
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38 // ----- Defines -----
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39
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40 // Verified Keypress Defines
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41 #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
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45 // ----- Macros -----
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46 #if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_)
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47 #define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
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48 #endif
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51
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52 // ----- Function Declarations -----
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53
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55
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56 // ----- Variables -----
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57
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58 // Timer Interrupt for flagging a send of the sampled key detection data to the USB host
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59 uint16_t sendKeypressCounter = 0;
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60
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61 // Flag generated by the timer interrupt
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62 volatile uint8_t sendKeypresses = 0;
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63
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65
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66 // ----- Functions -----
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67
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68 // Initial Pin Setup, make sure they are sane
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69 inline void pinSetup()
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70 {
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71
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72 // AVR
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73 #if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_)
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75 // For each pin, 0=input, 1=output
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76 #if defined(__AVR_AT90USB1286__)
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77 DDRA = 0x00;
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78 #endif
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79 DDRB = 0x00;
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80 DDRC = 0x00;
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81 DDRD = 0x00;
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82 DDRE = 0x00;
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83 DDRF = 0x00;
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85
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86 // Setting pins to either high or pull-up resistor
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87 #if defined(__AVR_AT90USB1286__)
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88 PORTA = 0x00;
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89 #endif
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90 PORTB = 0x00;
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91 PORTC = 0x00;
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92 PORTD = 0x00;
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93 PORTE = 0x00;
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94 PORTF = 0x00;
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95
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96 // ARM
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97 #elif defined(_mk20dx128_) || defined(_mk20dx128vlf5_) || defined(_mk20dx256_) // ARM
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98 // TODO - Should be cleared, but not that necessary due to the pin layout
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99 #endif
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100 }
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101
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102
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103 inline void usbTimerSetup()
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104 {
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105 // AVR
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106 #if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_)
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107
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108 // Setup with 16 MHz clock
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109 CPU_PRESCALE( 0 );
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110
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111 // Setup ISR Timer for flagging a kepress send to USB
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112 // Set to 256 * 1024 (8 bit timer with Clock/1024 prescalar) timer
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113 TCCR0A = 0x00;
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114 TCCR0B = 0x03;
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115 TIMSK0 = (1 << TOIE0);
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116
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117 // ARM
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118 #elif defined(_mk20dx128_) || defined(_mk20dx128vlf5_) || defined(_mk20dx256_) // ARM
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119 // 48 MHz clock by default
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120
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121 // System Clock Gating Register Disable
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122 SIM_SCGC6 |= SIM_SCGC6_PIT;
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123
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124 // Enable Timers
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125 PIT_MCR = 0x00;
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126
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127 // Setup ISR Timer for flagging a kepress send to USB
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128 // 1 ms / (1 / 48 MHz) - 1 = 47999 cycles -> 0xBB7F
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129 PIT_LDVAL0 = 0x0000BB7F;
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130 PIT_TCTRL0 = 0x3; // Enable Timer 0 interrupts, and Enable Timer 0
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131
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132 // Insert the required vector for Timer 0
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133 NVIC_ENABLE_IRQ( IRQ_PIT_CH0 );
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134 #endif
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135 }
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136
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137 int main()
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138 {
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139 // Configuring Pins
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140 pinSetup();
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142 // Enable CLI
125
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143 CLI_init();
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144
125
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145 // Setup Modules
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146 Output_setup();
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147 Macro_setup();
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148 Scan_setup();
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149
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150 // Setup ISR Timer for flagging a kepress send to USB
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151 usbTimerSetup();
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152
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153 // Main Detection Loop
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154 while ( 1 )
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155 {
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156 // Process CLI
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157 CLI_process();
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158
123
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159 // Acquire Key Indices
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160 // Loop continuously until scan_loop returns 0
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161 cli();
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162 while ( Scan_loop() );
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163 sei();
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164
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165 // Run Macros over Key Indices and convert to USB Keys
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166 Macro_process();
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167
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168 // Send keypresses over USB if the ISR has signalled that it's time
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169 if ( !sendKeypresses )
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170 continue;
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171
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172 // Send USB Data
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173 Output_send();
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174
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175 // Clear sendKeypresses Flag
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176 sendKeypresses = 0;
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177 }
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178 }
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179
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180
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181 // ----- Interrupts -----
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182
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183 // USB Keyboard Data Send Counter Interrupt
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184 #if defined(_at90usb162_) || defined(_atmega32u4_) || defined(_at90usb646_) || defined(_at90usb1286_) // AVR
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185 ISR( TIMER0_OVF_vect )
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186 #elif defined(_mk20dx128_) || defined(_mk20dx128vlf5_) || defined(_mk20dx256_) // ARM
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187 void pit0_isr()
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188 #endif
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189 {
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190 sendKeypressCounter++;
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191 if ( sendKeypressCounter > USB_TRANSFER_DIVIDER ) {
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192 sendKeypressCounter = 0;
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193 sendKeypresses = 1;
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194 }
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195
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196 #if defined(_mk20dx128_) || defined(_mk20dx128vlf5_) || defined(_mk20dx256_) // ARM
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197 // Clear the interrupt flag
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198 PIT_TFLG0 = 1;
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199 #endif
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200 }
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201
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202
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203 // ----- CLI Command Functions -----
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204
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205