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/*
* Copyright (c) 2005 Chris Kuethe <chris.kuethe@gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifdef _SRECORD_
#include "cskprog.h"
/*
* http://www.amelek.gda.pl/avr/uisp/srecord.htm
* S0: Comments
* S3: Memory Loadable Data, 4byte address
* S5: Count of S1, S2 and S3 Records
* S7: starting execution address intrepreted as a 4byte address
*/
/*
* bin2srec: turn a chunk of binary into an srecord file
* offset: used to specify load address
* num: up to 16 bytes can be encoded at one time
* bytes are read from bbuf and a ready-to-go srecord is placed in sbuf
*/
int
bin2srec(int offset, int num, unsigned char *bbuf, unsigned char *sbuf){
unsigned char abuf[34], sum;
int len;
if ((num < 1) || (num > 16))
return -1;
len = 4 + num + 1;
bzero(abuf, 34);
bzero(sbuf, 64);
hexdump(num, bbuf, abuf);
sum = sr_sum(len, offset, bbuf);
snprintf((char *)sbuf, 49, "S3%02X%08X%s%02X\r\n", len, offset, abuf, sum);
return 0;
}
int
srec_hdr(unsigned char *sbuf){
/* dlgsp2.bin looks for this header */
unsigned char hdr[] = "S00600004844521B\r\n";
bzero(sbuf, 64);
snprintf((char *)sbuf, 19, "%s", hdr);
return 0;
}
int
srec_fin(int num, unsigned char *sbuf){
unsigned char bbuf[4], sum;
bzero(bbuf, 4);
bzero(sbuf, 64);
bbuf[0] = (unsigned char)(num & 0xff);
bbuf[1] = (unsigned char)((num >> 8) & 0xff);
sum = sr_sum(3, 0, bbuf);
snprintf((char *)sbuf, 13, "S503%04X%02X\r\n", num, sum);
return 0;
}
void
hexdump(int j, unsigned char *bbuf, unsigned char *abuf){
int i;
bzero(abuf, 34);
if (j > 32)
j = 32;
for(i = 0; i < j; i++){
abuf[i*2] = hc((bbuf[i] &0xf0) >> 4);
abuf[i*2+1] = hc(bbuf[i] &0x0f);
}
}
char
hc(char x){
switch(x){
case 15:
case 14:
case 13:
case 12:
case 11:
case 10:
return ('A' + x - 10);
break;
case 9:
case 8:
case 7:
case 6:
case 5:
case 4:
case 3:
case 2:
case 1:
case 0:
return ('0' + x);
break;
default:
return '0';
break;
}
}
unsigned char
sr_sum(int count, int addr, unsigned char *bbuf){
int i, j;
unsigned char k, sum = 0;
sum = (count & 0xff);
sum += ((addr & 0x000000ff));
sum += ((addr & 0x0000ff00) >> 8);
sum += ((addr & 0x00ff0000) >> 16);
sum += ((addr & 0xff000000) >> 24);
j = count - 5;
for(i = 0; i < j; i++){
k = bbuf[i];
sum += k;
}
return ~sum;
}
#else
extern int errno;
#endif
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