mirror of
https://github.com/usetrmnl/bb_epaper.git
synced 2026-04-29 13:43:26 -07:00
Laurence Bank
69 lines
2.2 KiB
C++
69 lines
2.2 KiB
C++
//
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// Convert binary data to C hex statements
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//
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#include <Arduino.h>
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//
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// Convert from bin to hex using the same buffer
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//
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int bin2c(char *leafname, uint8_t *pSrc, int iSrcSize, int w, int h)
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{
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int i, j, k, iCount, iSize = 0;
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char szTemp[128];
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uint8_t *p, *pTemp;
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const uint8_t u8Hex[16] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
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pTemp = (uint8_t *)malloc(iSrcSize);
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if (!pTemp) return 0; // something went wrong
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memcpy(pTemp, pSrc, iSrcSize); // keep original binary data here
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sprintf(szTemp, "//\n// %d x %d 1-bpp G5 compressed image\n", w, h);
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i = strlen(szTemp);
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memcpy(&pSrc[iSize], szTemp, i);
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iSize += i;
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sprintf(szTemp, "// data size = %d bytes\n//\n", iSrcSize);
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i = strlen(szTemp);
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memcpy(&pSrc[iSize], szTemp, i);
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iSize += i;
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sprintf(szTemp, "// for non-Arduino builds...\n#ifndef PROGMEM\n#define PROGMEM\n#endif\nconst uint8_t %s[] PROGMEM = {\n", leafname); // start of data array
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i = strlen(szTemp);
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memcpy(&pSrc[iSize], szTemp, i);
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iSize += i;
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// convert the data
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iCount = 0;
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p = pTemp;
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for (i=0; i<iSrcSize>>4; i++) { // do lines of 16 bytes
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pSrc[iSize++] = '\t';
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for (j=0; j<16; j++) {
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pSrc[iSize++] = '0';
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pSrc[iSize++] = 'x';
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pSrc[iSize++] = u8Hex[p[(i*16)+j]>>4];
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pSrc[iSize++] = u8Hex[p[(i*16)+j] & 0xf];
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if (iCount != iSrcSize-1) { // add a comma
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pSrc[iSize++] = ',';
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}
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iCount++;
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}
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pSrc[iSize++] = '\n';
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} // for each data byte
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p += (iSrcSize & 0xfff0); // point to last section
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if (iSrcSize & 0xf) // any remaining characters?
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{
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pSrc[iSize++] = '\t';
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for (j=0; j<(iSrcSize & 0xf); j++) {
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pSrc[iSize++] = '0';
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pSrc[iSize++] = 'x';
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pSrc[iSize++] = u8Hex[p[(i*16)+j]>>4];
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pSrc[iSize++] = u8Hex[p[(i*16)+j] & 0xf];
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if (iCount != iSrcSize-1) { // add a comma
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pSrc[iSize++] = ',';
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}
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iCount++;
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}
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}
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// finalize
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pSrc[iSize++] = '}';
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pSrc[iSize++] = ';';
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pSrc[iSize++] = '\n'; // final closing brace
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return iSize;
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} /* bin2c() */
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