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71 lines
1.3 KiB
C
71 lines
1.3 KiB
C
#include <unistd.h>
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#include <strings.h>
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#include <stdio.h>
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#include <string.h>
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#include <inttypes.h>
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int hexfile_parse(char *line, unsigned int *type, unsigned int *addr, unsigned char *buffer)
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{
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unsigned int row_len = 0;
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unsigned int row_index = 7;
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unsigned int i;
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int tmp;
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uint8_t cksum = 0;
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int retval = 0;
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retval = sscanf(line, ":%2x%4x%2x", &row_len, addr, type);
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cksum += row_len;
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cksum += *addr >> 8;
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cksum += *addr & 0xFF;
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cksum += *type;
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i = 0;
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if (retval == 3)
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{
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while(i < row_len)
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{
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if (sscanf(&line[row_index], "%2x", &tmp) == 1)
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{
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cksum += tmp;
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buffer[i++] = (unsigned char) tmp;
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row_index += 2;
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}
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else return -1;
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}
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if (sscanf(&line[row_index], "%2x", &tmp) == 1)
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{
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if ((cksum + (uint8_t) tmp) == 0) return row_len;
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}
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}
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return -1;
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}
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int hexfile_out(char *line, unsigned int type, unsigned int address, unsigned char *data, unsigned int bytes)
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{
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uint8_t cksum = 0;
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uint8_t i = 0;
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char tmp[8];
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sprintf(line, ":%2.2X%4.4X%2.2X", bytes, address, type);
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cksum -= bytes;
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cksum -= address >> 8;
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cksum -= address & 0xFF;
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cksum -= type;
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for (i=0; i<bytes; i++)
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{
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sprintf(tmp, "%2.2X", data[i]);
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strcat(line, tmp);
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cksum -= data[i];
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}
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sprintf(tmp, "%2.2X\r\n", cksum);
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strcat(line, tmp);
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return strlen(line);
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}
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