| | 1 | = ウォッチドック基板のファームウェア = |
| | 2 | |
| | 3 | ウォッチドッグ基板上のATTiny85のソースファイルです。 |
| | 4 | |
| | 5 | - WDtimer.c |
| | 6 | {{{ |
| | 7 | /************************************* |
| | 8 | ** main.c ** |
| | 9 | ** ** |
| | 10 | ** Created : 2014/12/18 14:43:39 ** |
| | 11 | ** Author : O.aoki ** |
| | 12 | *************************************/ |
| | 13 | |
| | 14 | #include <avr/io.h> |
| | 15 | #include <avr/interrupt.h> |
| | 16 | #include <stdlib.h> |
| | 17 | |
| | 18 | #include "WDtimer.h" |
| | 19 | |
| | 20 | //#define F_CPU 8000000UL // 8 MHz |
| | 21 | //#include <util/delay.h> |
| | 22 | |
| | 23 | /*--------------------------------------------------- |
| | 24 | Global variable |
| | 25 | */ |
| | 26 | volatile unsigned char IntFlag; |
| | 27 | volatile unsigned char LowCounter; |
| | 28 | volatile unsigned char HighCounter; |
| | 29 | volatile unsigned long GlobalCounter; |
| | 30 | volatile unsigned long WDCounter; |
| | 31 | |
| | 32 | /*--------------------------------------------------- |
| | 33 | Timer |
| | 34 | */ |
| | 35 | void Timer_Init() { // base CK = 8MHz |
| | 36 | OCR1C = 10; // 0.0102 sec |
| | 37 | BitSet(TIFR, TOV1); // clear overflow flag |
| | 38 | BitSet(TIMSK, TOIE1); // Parmit overflow interrupt |
| | 39 | TCCR1 = 0b11001110; // Clear timer, PWM Mode, No Output, timer-prescaler 1/8192 |
| | 40 | } |
| | 41 | |
| | 42 | /*--------------------------------------------------- |
| | 43 | In-port driver |
| | 44 | */ |
| | 45 | /* ---- Watch dog pulse ---- */ |
| | 46 | void WD_Port_Read() { |
| | 47 | if ((~PINB) & (1<<WDpulse)) { |
| | 48 | HighCounter = 0; |
| | 49 | if (LowCounter < 250) LowCounter++; |
| | 50 | } else { |
| | 51 | if (HighCounter < 250) HighCounter++; |
| | 52 | LowCounter = 0; |
| | 53 | } |
| | 54 | } |
| | 55 | |
| | 56 | unsigned char WD_Port_Rise_Edge() { |
| | 57 | if (HighCounter == 9) return (0xFF); |
| | 58 | return (0); |
| | 59 | } |
| | 60 | |
| | 61 | unsigned char WD_Port_Fall_Edge() { |
| | 62 | if (LowCounter == 9) return (0xFF); |
| | 63 | return (0); |
| | 64 | } |
| | 65 | |
| | 66 | unsigned char WD_Port_Double_Edge() { |
| | 67 | if (HighCounter == 9) return (0xFF); |
| | 68 | if (LowCounter == 9) return (0xFF); |
| | 69 | return (0); |
| | 70 | } |
| | 71 | |
| | 72 | /* ---- Jumper switch port for LED ---- */ |
| | 73 | unsigned char JSW_Port() { |
| | 74 | if ((~PINB) & (1<<LEDsw)) return (0xFF); |
| | 75 | return (0); |
| | 76 | } |
| | 77 | |
| | 78 | /*--------------------------------------------------- |
| | 79 | Main Routine |
| | 80 | */ |
| | 81 | int main( void ) { |
| | 82 | unsigned char WDstat; |
| | 83 | unsigned char preCounter; |
| | 84 | unsigned char LEDflag; |
| | 85 | |
| | 86 | /* ******* 初期化開始 ******* */ |
| | 87 | cli(); // 初期処理中は割り込み禁止 |
| | 88 | |
| | 89 | // ---- 変数初期化 |
| | 90 | GlobalCounter = 0; |
| | 91 | WDstat = WD_default; |
| | 92 | WDCounter = 0; |
| | 93 | preCounter = 0; |
| | 94 | // ---- ポートＢ初期化 |
| | 95 | BitSet(MCUCR, PUD); |
| | 96 | DDRB = OutPortMask; // Set to `PB4` `PB1` ouput |
| | 97 | PORTB = OutPortMask; // Output default pattern |
| | 98 | RstLED; |
| | 99 | // ---- タイマー初期設定 |
| | 100 | Timer_Init(); |
| | 101 | |
| | 102 | sei(); // 割込み許可 |
| | 103 | |
| | 104 | /* ******* 初期化終了 ******* */ |
| | 105 | |
| | 106 | while (1) { // main loop |
| | 107 | LEDflag = 0; |
| | 108 | switch (WDstat) { |
| | 109 | case WD_ReBoot : |
| | 110 | if ((GlobalCounter & 0x00000003) == 0) LEDflag = 0xFF; |
| | 111 | OffFET; |
| | 112 | if (WDCounter >= WD_RecoveryTime) { |
| | 113 | WDstat = WD_default; |
| | 114 | WDCounter = 0; |
| | 115 | } |
| | 116 | preCounter = 0; |
| | 117 | break; |
| | 118 | case WD_default : |
| | 119 | if ((GlobalCounter & 0x0000007F) == 0) LEDflag = 0xFF; |
| | 120 | OnFET; |
| | 121 | WDCounter = 0; |
| | 122 | if (WD_Port_Fall_Edge()) { |
| | 123 | preCounter++; |
| | 124 | if (preCounter > WD_StartPulseNumber) WDstat = WD_active; |
| | 125 | } |
| | 126 | break; |
| | 127 | case WD_active : |
| | 128 | if ((GlobalCounter & 0x0000000F) == 0) LEDflag = 0xFF; |
| | 129 | OnFET; |
| | 130 | if (WD_Port_Fall_Edge()) WDCounter = 0; |
| | 131 | if (WDCounter >= WD_TimeOut) { |
| | 132 | WDstat = WD_ReBoot; |
| | 133 | WDCounter = 0; |
| | 134 | } |
| | 135 | break; |
| | 136 | default: |
| | 137 | WDstat = WD_ReBoot; |
| | 138 | WDCounter = 0; |
| | 139 | break; |
| | 140 | } |
| | 141 | if (!JSW_Port()) |
| | 142 | RstLED; |
| | 143 | else |
| | 144 | if (LEDflag) TglLED; |
| | 145 | IntFlag = 1; |
| | 146 | while (IntFlag == 1); |
| | 147 | } |
| | 148 | } |
| | 149 | |
| | 150 | /*------------------------------------------------------ |
| | 151 | Timer Interrupt Sub Routines |
| | 152 | */ |
| | 153 | /* -=-=-=-= Timer Overflow ISR =-=-=-=- */ |
| | 154 | ISR(SIG_OVERFLOW1) { |
| | 155 | WD_Port_Read(); |
| | 156 | GlobalCounter++; |
| | 157 | WDCounter++; |
| | 158 | IntFlag = 0; |
| | 159 | } |
| | 160 | }}} |
| | 161 | |
| | 162 | - WDtimer.h |
| | 163 | {{{ |
| | 164 | /************************************* |
| | 165 | ** main.c ** |
| | 166 | ** ** |
| | 167 | ** Created : 2014/12/18 14:43:39 ** |
| | 168 | ** Author : O.aoki ** |
| | 169 | **************************************/ |
| | 170 | |
| | 171 | #define __ATtiny85__ 1 // チップ環境を"ATtiny85"としてコンパイルする |
| | 172 | |
| | 173 | /* ---- 定数 ---- */ |
| | 174 | #define OutPortMask (1 << FET) + (1 << LED) // ポート出力レジスタのマスクパターン |
| | 175 | #define WD_TimeOut 5*100 // ウォッチドッグのタイムアウト[*10mS] |
| | 176 | #define WD_RecoveryTime 10*100 // Raspberry Piのリブート（電源off）時間[*10mS] |
| | 177 | #define WD_StartPulseNumber 5 // ウォッチドッグ開始シグナルのエッジ検出数 |
| | 178 | |
| | 179 | /* ---- ウォッチドッグステータス ---- */ |
| | 180 | #define WD_ReBoot 0 |
| | 181 | #define WD_default 1 |
| | 182 | #define WD_active 2 |
| | 183 | |
| | 184 | /* -=-=-= Inport =-=-=- */ |
| | 185 | /* ---- Watch dog pulse ---- */ |
| | 186 | #define WDpulse PINB0 // Global : Watch dog pulse port |
| | 187 | /* ---- Jumper switch port for LED ---- */ |
| | 188 | #define LEDsw PINB3 // Global : jumper sw port |
| | 189 | |
| | 190 | /* -=-=-= Outport =-=-=- */ |
| | 191 | /* ---- ビット操作 ---- */ |
| | 192 | #define BitRst(addr, bit) addr &= ~(1<<bit) // Global : addrのbit番目をLowに |
| | 193 | #define BitSet(addr, bit) addr |= (1<<bit) // Global : addrのbit番目をHighに |
| | 194 | #define BitTgl(addr, bit) addr ^= (1<<bit) // Global : addrのbit番目を反転 |
| | 195 | |
| | 196 | /* ---- FET操作 ---- */ |
| | 197 | #define FET PB4 |
| | 198 | #define OnFET BitRst(PORTB, FET) // Global : FETを繋げる |
| | 199 | #define OffFET BitSet(PORTB, FET) // Global : FETを切る |
| | 200 | |
| | 201 | /* ---- LED操作 ---- */ |
| | 202 | #define LED PB1 |
| | 203 | #define SetLED BitRst(PORTB, LED) // Global : LEDを点ける |
| | 204 | #define RstLED BitSet(PORTB, LED) // Global : LEDを消す |
| | 205 | #define TglLED BitTgl(PORTB, LED) // Global : LEDを反転 |
| | 206 | |
| | 207 | /* -=-=-= Debug用 =-=-=- */ |
| | 208 | /* ---- Debug用LED ---- */ |
| | 209 | #define LED1 1 |
| | 210 | #define SetLED1 BitRst(PORTB, LED1) // Global : LED1を点ける |
| | 211 | #define RstLED1 BitSet(PORTB, LED1) // Global : LED1を消す |
| | 212 | #define TglLED1 BitTgl(PORTB, LED1) // Global : LED1を反転 |
| | 213 | |
| | 214 | }}} |
