Mercurial > louis > kiibohd-controller

annotate main.c @ 25:c2ef3daf39e1

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Cleaning up main.c - main.c is now mostly complete - Required fixes to matrix.c (some are temporary)
author Jacob Alexander <haata@users.sf.net>
date Fri, 30 Sep 2011 01:30:34 -0700
parents 2d65da455ef3
children c06a5ebb4fca
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1 /* Copyright (C) 2011 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 // AVR Includes
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25 #include <avr/io.h>
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26 #include <avr/interrupt.h>
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27
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28 // Project Includes
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29 #include <macro.h>
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30 #include <scan_loop.h>
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31 #include <usb_com.h>
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32
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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 #define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
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47
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48
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49
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50 // ----- Variables -----
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51
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52 // Timer Interrupt for flagging a send of the sampled key detection data to the USB host
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53 uint16_t sendKeypressCounter = 0;
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54
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55 // Flag generated by the timer interrupt
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56 volatile uint8_t sendKeypresses = 0;
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57
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58
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59
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60 // ----- Functions -----
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61
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62 // Initial Pin Setup, make sure they are sane
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63 inline void pinSetup(void)
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64 {
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65 // For each pin, 0=input, 1=output
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66 DDRA = 0x00;
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67 DDRB = 0x00;
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68 DDRC = 0x00;
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69 DDRD = 0x00;
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70 DDRE = 0x00;
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71 DDRF = 0x00;
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72
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73
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74 // Setting pins to either high or pull-up resistor
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75 PORTA = 0x00;
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76 PORTB = 0x00;
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77 PORTC = 0x00;
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78 PORTD = 0x00;
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79 PORTE = 0x00;
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80 PORTF = 0x00;
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81 }
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82
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83 int main(void)
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84 {
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85 // Setup with 16 MHz clock
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86 CPU_PRESCALE( 0 );
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87
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88 // Configuring Pins
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89 pinSetup();
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90 init_errorLED();
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91
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92 // Setup USB Module
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93 usb_setup();
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94
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95 // Setup ISR Timer for flagging a kepress send to USB
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96 // Set to 256 * 1024 (8 bit timer with Clock/1024 prescalar) timer
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97 TCCR0A = 0x00;
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98 TCCR0B = 0x03;
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99 TIMSK0 = (1 << TOIE0);
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100
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101 // Main Detection Loop
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102 uint8_t ledTimer = 15; // Enable LED for a short time
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103 while ( 1 )
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104 {
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105 while ( 1 )
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106 {
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107 // Acquire Key Indices
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108 scan_loop();
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109
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110 // Send keypresses over USB if the ISR has signalled that it's time
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111 if ( !sendKeypresses )
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112 continue;
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113
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114 // Run Macros over Key Indices and convert to USB Keys
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115 process_macros();
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116
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117 // Send USB Data
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118 usb_send();
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119
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120 // Clear sendKeypresses Flag
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121 sendKeypresses = 0;
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122
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123 // Indicate Error, if valid
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124 errorLED( ledTimer );
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125 }
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126
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127 // Loop should never get here (indicate error)
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128 ledTimer = 255;
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129
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130 // HID Debug Error message
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131 erro_print("Detection loop error, this is very bad...bug report!");
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132 }
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133 }
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134
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135 ISR( TIMER0_OVF_vect )
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136 {
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137 sendKeypressCounter++;
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138 if ( sendKeypressCounter > USB_TRANSFER_DIVIDER ) {
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139 sendKeypressCounter = 0;
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140 sendKeypresses = 1;
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141 }
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142 }
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