| 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 | }}} |