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| 1 | //********************************************************************************************** | |
| 2 | // | |
| 3 | // Title: GB to Video | |
| 4 | // Author: FriendofMegaman | |
| 5 | // | |
| 6 | // Cleaned a bit by Jazzmarazz | |
| 7 | // | |
| 8 | //********************************************************************************************** | |
| 9 | ||
| 10 | ||
| 11 | //********************************************************************************************** | |
| 12 | // | |
| 13 | // Designate Pins with Names | |
| 14 | // | |
| 15 | //********************************************************************************************** | |
| 16 | ||
| 17 | // Reassign according to your pinout | |
| 18 | const int pVsync = 2; | |
| 19 | const int pClock = 3; | |
| 20 | const int pData0 = 4; | |
| 21 | const int pData1 = 5; | |
| 22 | const int pHsync = 6; | |
| 23 | ||
| 24 | //********************************************************************************************** | |
| 25 | // | |
| 26 | // Create them Variables | |
| 27 | // | |
| 28 | //********************************************************************************************** | |
| 29 | ||
| 30 | int vsync = 0; | |
| 31 | int clock = 0; | |
| 32 | unsigned char data0 = 0; | |
| 33 | unsigned char data1 = 0; | |
| 34 | int hsync = 0; | |
| 35 | ||
| 36 | int vsync_prev = 0; | |
| 37 | int clock_prev = 0; | |
| 38 | - | // int hsync_read = 0; // Never got used it seems |
| 38 | + | |
| 39 | ||
| 40 | unsigned char pixel = 0; | |
| 41 | ||
| 42 | int line = 0; | |
| 43 | int offset = 0; | |
| 44 | ||
| 45 | int array_offset = 0; | |
| 46 | int byte_offset = 0; | |
| 47 | int bit_offset; | |
| 48 | ||
| 49 | unsigned char frame[5760]; | |
| 50 | ||
| 51 | void setup(){
| |
| 52 | - | Serial.begin(40000); |
| 52 | + | Serial.begin(1); |
| 53 | - | // Pins default to inputs. No need for PinMode |
| 53 | + | memset(frame,0,sizeof(frame)); |
| 54 | - | memset(frame,0,sizeof(frame)); // for (int i=0; i<5760; frame[i++]=0); |
| 54 | + | |
| 55 | ||
| 56 | //********************************************************************************************** | |
| 57 | // | |
| 58 | // Main Loop | |
| 59 | // | |
| 60 | //********************************************************************************************** | |
| 61 | ||
| 62 | void loop() {
| |
| 63 | vsync = digitalRead(pVsync), | |
| 64 | clock = digitalRead(pClock), | |
| 65 | data0 = digitalRead(pData0), | |
| 66 | data1 = digitalRead(pData1), | |
| 67 | hsync = digitalRead(pHsync); | |
| 68 | ||
| 69 | readClock(); | |
| 70 | readHsync(); | |
| 71 | readVsync(); | |
| 72 | ||
| 73 | clock_prev = clock; | |
| 74 | vsync_prev = vsync; | |
| 75 | hsync_prev = hsync; | |
| 76 | } | |
| 77 | ||
| 78 | //********************************************************************************************** | |
| 79 | // | |
| 80 | // Read hsync | |
| 81 | // | |
| 82 | //********************************************************************************************** | |
| 83 | ||
| 84 | void readHsync(){
| |
| 85 | // Read HSYNC (rising edge) | |
| 86 | if (hsync_prev == LOW && hsync == HIGH){
| |
| 87 | // Next line | |
| 88 | line++; | |
| 89 | offset = 0; | |
| 90 | } | |
| 91 | return; | |
| 92 | } | |
| 93 | ||
| 94 | //********************************************************************************************** | |
| 95 | // | |
| 96 | // Read vsync | |
| 97 | // | |
| 98 | //********************************************************************************************** | |
| 99 | ||
| 100 | void readVsync(){
| |
| 101 | if (vsync_prev==LOW && vsync==HIGH){
| |
| 102 | // Next frame | |
| 103 | ||
| 104 | // Frame divider 0x1E001E00 | |
| 105 | - | // Frame divider 0x1E00 |
| 105 | + | |
| 106 | Serial.write(0x00); | |
| 107 | Serial.write(0x1E); | |
| 108 | Serial.write(0x00); | |
| 109 | ||
| 110 | - | for (int i=0; i<5760; i++){
|
| 110 | + | |
| 111 | - | Serial.write(frame[i]); |
| 111 | + | Serial.write(frame, 5760); |
| 112 | - | frame[i] = 0; |
| 112 | + | memset(frame, 0, sizeof(frame)); |
| 113 | - | } |
| 113 | + | |
| 114 | line = 0; | |
| 115 | offset = 0; | |
| 116 | } | |
| 117 | return; | |
| 118 | } | |
| 119 | ||
| 120 | //********************************************************************************************** | |
| 121 | // | |
| 122 | // Read clock | |
| 123 | // | |
| 124 | //********************************************************************************************** | |
| 125 | ||
| 126 | void readClock(){
| |
| 127 | if (clock_prev == HIGH && clock == LOW){
| |
| 128 | // Read pixels | |
| 129 | if (offset<160 && line<144){
| |
| 130 | ||
| 131 | pixel = 2*data1+data0; | |
| 132 | ||
| 133 | // ************ IMPORTANT ************ | |
| 134 | // This part could be implemented as 2-dimensional array, I'm just saving RAM. I tried to make it 2D and the result | |
| 135 | // was the same. | |
| 136 | // **************************************** | |
| 137 | // Offset in the frame bit map | |
| 138 | bit_offset = (line*320)+offset*2; | |
| 139 | ||
| 140 | // The actual char in the frame array | |
| 141 | array_offset = bit_offset/8; | |
| 142 | ||
| 143 | // The offset within one byte | |
| 144 | byte_offset = bit_offset%8; | |
| 145 | ||
| 146 | // Put the pixel into frame | |
| 147 | frame[array_offset]+=(pixel<<byte_offset); | |
| 148 | } | |
| 149 | offset++; | |
| 150 | } | |
| 151 | return; | |
| 152 | } |