Rev 1063 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | SVN | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1011 | runge | 1 | |
| 1020 | arune | 2 | const MAX_SIZE = 524288; |
| 3 | |||
| 1065 | arune | 4 | /* Call constructor with the contents of an Intel Hex file (rows as arrays) |
| 5 | http://en.wikipedia.org/wiki/.hex |
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| 6 | */ |
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| 1013 | arune | 7 | function IntelHex(hexLines) |
| 1011 | runge | 8 | { |
| 1013 | arune | 9 | this.myValid = false; |
| 10 | this.myAddrLower = 0x7FFFFFFF; |
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| 11 | this.myAddrUpper = 0; |
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| 1020 | arune | 12 | this.myHexData = new Array(MAX_SIZE); |
| 13 | for (var i = 0; i < MAX_SIZE; i++) this.myHexData[i] = 0xFF; |
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| 1013 | arune | 14 | |
| 15 | var lineDataCount = 0; |
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| 16 | var lineAddrHigh = 0; |
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| 17 | var lineAddr = 0; |
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| 18 | var lineCode = 0; |
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| 19 | var fullAddr = 0; |
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| 1065 | arune | 20 | |
| 21 | /* Parse hexfile to binary (array of bytes) */ |
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| 1013 | arune | 22 | for (var n = 0; n < hexLines.length; n++) |
| 23 | { |
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| 24 | if (hexLines[n].length>=11 && hexLines[n].substr(0,1)==":") { |
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| 1065 | arune | 25 | lineDataCount = hex2uint(hexLines[n].substr(1,2)); /* Byte count */ |
| 26 | lineAddr = hex2uint(hexLines[n].substr(3,4)) & 65535; /* Address */ |
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| 27 | lineCode = hex2uint(hexLines[n].substr(7,2)); /* Record type */ |
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| 1013 | arune | 28 | fullAddr = (lineAddrHigh * 65536) + lineAddr; |
| 29 | |||
| 1065 | arune | 30 | switch(lineCode) |
| 1013 | arune | 31 | { |
| 1065 | arune | 32 | case 0: /* If Data record */ |
| 1013 | arune | 33 | if ((fullAddr + lineDataCount - 1) > this.myAddrUpper) this.myAddrUpper = fullAddr + lineDataCount - 1; |
| 34 | if (lineCode == 0 && fullAddr < this.myAddrLower) this.myAddrLower = fullAddr; |
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| 35 | for (var j = 0; j < lineDataCount; j++) { |
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| 36 | this.myHexData[fullAddr] = hex2uint(hexLines[n].substr(j * 2 + 9, 2)); |
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| 37 | fullAddr++; |
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| 38 | } |
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| 39 | break; |
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| 1065 | arune | 40 | case 4: /* If Extended Linear Address Record */ |
| 1063 | arune | 41 | lineAddrHigh = hex2uint(hexLines[n].substr(9, 4)) & 65535; |
| 1013 | arune | 42 | break; |
| 1065 | arune | 43 | case 1: /* If End Of File record */ |
| 1013 | arune | 44 | this.myValid = true; |
| 45 | break; |
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| 46 | |||
| 47 | } |
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| 48 | } |
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| 49 | } |
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| 1011 | runge | 50 | } |
| 51 | |||
| 52 | IntelHex.prototype.myHexData = null; |
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| 1013 | arune | 53 | IntelHex.prototype.myAddrLower = null; |
| 54 | IntelHex.prototype.myAddrUpper = null; |
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| 55 | IntelHex.prototype.myValid = null; |
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| 1011 | runge | 56 | |
| 1065 | arune | 57 | /* Get the CRC of data, includes "holes" in the middle */ |
| 1020 | arune | 58 | IntelHex.prototype.getCRC16 = function() |
| 59 | { |
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| 60 | var crc=0; |
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| 1063 | arune | 61 | for (var i = this.myAddrLower; i <= this.myAddrUpper; i++) |
| 1020 | arune | 62 | { |
| 63 | crc = this.crc16_update(crc, this.myHexData[i]); |
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| 64 | } |
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| 65 | return crc&0xffff; |
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| 66 | } |
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| 67 | |||
| 68 | IntelHex.prototype.crc16_update = function(crc, byte) |
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| 69 | { |
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| 70 | crc ^= byte; |
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| 71 | for (var i = 0; i<8; ++i) |
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| 72 | { |
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| 73 | if ((crc & 1) != 0) |
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| 74 | { |
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| 75 | crc = (crc >> 1) ^ 0xA001; |
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| 76 | } |
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| 77 | else |
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| 78 | { |
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| 79 | crc = (crc >> 1); |
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| 80 | } |
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| 81 | } |
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| 82 | return crc; |
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| 83 | } |
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| 84 | |||
| 1065 | arune | 85 | /* Get the length of the data */ |
| 1013 | arune | 86 | IntelHex.prototype.getLength = function() |
| 1011 | runge | 87 | { |
| 1063 | arune | 88 | if (this.myAddrUpper+1>this.myAddrLower) |
| 89 | { |
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| 90 | return (this.myAddrUpper - this.myAddrLower + 1); |
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| 91 | } |
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| 92 | else |
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| 93 | { |
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| 94 | return 0; |
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| 95 | } |
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| 1011 | runge | 96 | } |
| 97 | |||
| 1065 | arune | 98 | /* Get the validity of the data (check if end of file record was found) */ |
| 1013 | arune | 99 | IntelHex.prototype.isValid = function() |
| 100 | { |
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| 101 | return this.myValid; |
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| 102 | } |
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| 103 | |||
| 1065 | arune | 104 | /* Get the lowest address of the data */ |
| 1013 | arune | 105 | IntelHex.prototype.getAddrLower = function() |
| 106 | { |
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| 107 | return this.myAddrLower; |
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| 108 | } |
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| 109 | |||
| 1065 | arune | 110 | /* Get the highest address of the data */ |
| 1020 | arune | 111 | IntelHex.prototype.getAddrUpper = function() |
| 112 | { |
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| 113 | return this.myAddrUpper; |
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| 114 | } |
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| 115 | |||
| 1065 | arune | 116 | /* Get a byte at a certain address */ |
| 1011 | runge | 117 | IntelHex.prototype.getByte = function(address) |
| 118 | { |
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| 1013 | arune | 119 | var byte = 0xff; |
| 1020 | arune | 120 | if (address < MAX_SIZE && this.myValid) { |
| 1013 | arune | 121 | byte = this.myHexData[address]; |
| 122 | } |
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| 1011 | runge | 123 | |
| 124 | return byte; |
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| 125 | } |