37 lines
1.2 KiB
JavaScript
37 lines
1.2 KiB
JavaScript
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/** Parse Intel HEX text into a program Uint8Array (byte-addressed). */
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export function parseIntelHex(text) {
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const bytes = [];
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let highAddr = 0;
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for (const rawLine of text.split('\n')) {
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const line = rawLine.trim();
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if (!line.startsWith(':')) continue;
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const byteCount = parseInt(line.slice(1, 3), 16);
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const addr = parseInt(line.slice(3, 7), 16);
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const type = parseInt(line.slice(7, 9), 16);
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if (type === 0) {
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const fullAddr = (highAddr << 16) | addr;
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for (let i = 0; i < byteCount; i++) {
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const b = parseInt(line.slice(9 + i * 2, 11 + i * 2), 16);
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bytes[fullAddr + i] = b;
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}
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} else if (type === 1) {
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break;
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} else if (type === 4) {
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highAddr = parseInt(line.slice(9, 13), 16);
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}
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}
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const maxAddr = bytes.length;
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const out = new Uint8Array(maxAddr);
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for (let i = 0; i < maxAddr; i++) out[i] = bytes[i] ?? 0;
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return out;
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}
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/** Convert byte array into avr8js 16-bit word array (little-endian). */
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export function bytesToProgramWords(bytes, wordCount = 0x8000 / 2) {
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const prog = new Uint16Array(wordCount);
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for (let i = 0; i < bytes.length; i += 2) {
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prog[i >> 1] = (bytes[i] || 0) | ((bytes[i + 1] || 0) << 8);
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}
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return prog;
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}
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