forked from Archive/PX4-Autopilot
316 lines
9.2 KiB
C
316 lines
9.2 KiB
C
/****************************************************************************
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* configs/pic32mx7mmb/tools/mkpichex.c
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*
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* Copyright (C) 2011-2012 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <errno.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define MAX_LINE 1024
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/* Line offsets */
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#define START_OFFSET 0
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#define LEN_OFFSET 1
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#define ADDR_OFFSET (LEN_OFFSET + 2)
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#define TYPE_OFFSET (ADDR_OFFSET + 4)
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#define PAYLOAD_OFFSET (TYPE_OFFSET + 2)
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#define CHKSUM_OFFSET(n) (PAYLOAD_OFFSET+2*(n))
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/* Record types:
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*
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* 00, data record, contains data and 16-bit address. The format described
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* above.
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* 01, End Of File record, a file termination record. No data. Has to be
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* the last line of the file, only one per file permitted. Usually
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* ':00000001FF'. Originally the End Of File record could contain a
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* start address for the program being loaded, e.g. :00AB2F0125
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* would make a jump to address AB2F. This was convenient when programs
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* were loaded from punched paper tape.
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* 02, Extended Segment Address Record, segment-base address. Used when 16
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* bits are not enough, identical to 80x86 real mode addressing. The
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* address specified by the 02 record is multiplied by 16 (shifted 4
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* bits left) and added to the subsequent 00 record addresses. This
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* allows addressing of up to a megabyte of address space. The address
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* field of this record has to be 0000, the byte count is 02 (the segment
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* is 16-bit). The least significant hex digit of the segment address is
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* always 0.
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* 03, Start Segment Address Record. For 80x86 processors, it specifies the
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* initial content of the CS:IP registers. The address field is 0000, the
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* byte count is 04, the first two bytes are the CS value, the latter two
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* are the IP value.
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* 04, Extended Linear Address Record, allowing for fully 32 bit addressing.
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* The address field is 0000, the byte count is 02. The two data bytes
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* represent the upper 16 bits of the 32 bit address, when combined with
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* the address of the 00 type record.
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* 05, Start Linear Address Record. The address field is 0000, the byte
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* count is 04. The 4 data bytes represent the 32-bit value loaded into
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* the EIP register of the 80386 and higher CPU.
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*/
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#define TYPE_DATA 0
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#define TYPE_EOF 1
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#define TYPE_EXTSEG 2
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#define TYPE_STARTSEG 3
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#define TYPE_EXTLIN 4
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#define TYPE_STARTLIN 5
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/****************************************************************************
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* Private Types
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****************************************************************************/
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struct hex_s
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{
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unsigned char len; /* Length of the data payload */
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unsigned char type; /* Record type */
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unsigned short addr; /* Lower 16-bit address */
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};
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static char line[MAX_LINE+1];
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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static inline char *getfilepath(const char *path, const char *name, const char *extension)
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{
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snprintf(line, MAX_LINE, "%s/%s.%s", path, name, extension);
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line[MAX_LINE] = '\0';
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return strdup(line);
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}
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static void show_usage(const char *progname)
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{
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fprintf(stderr, "USAGE: %s <abs path to nuttx.hex>\n", progname);
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exit(1);
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}
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static unsigned char get4(char hex)
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{
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if (hex >= '0' && hex <= '9')
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{
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return hex - '0';
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}
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else if (hex >= 'a' && hex <= 'f')
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{
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return hex - 'a' + 10;
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}
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else if (hex >= 'A' && hex <= 'F')
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{
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return hex - 'A' + 10;
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}
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fprintf(stderr, "Bad hex character code: %s\n", line);
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exit(2);
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}
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static unsigned char get8(const char *ptr)
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{
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return get4(ptr[0]) << 4 | get4(ptr[1]);
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}
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static unsigned short get16(const char *ptr)
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{
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return (unsigned short)get8(&ptr[0]) << 8 | (unsigned short)get8(&ptr[2]);
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}
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static int parse_line(struct hex_s *hexline)
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{
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/* :LLAAAATT... */
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if (line[START_OFFSET] != ':')
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{
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fprintf(stderr, "Bad start code: %s\n", line);
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return 1;
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}
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hexline->len = get8(&line[LEN_OFFSET]);
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hexline->addr = get16(&line[ADDR_OFFSET]);
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hexline->type = get8(&line[TYPE_OFFSET]);
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return 0;
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}
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#if 0
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static unsigned char checksum(chksum_ndx)
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{
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int chksum = 0;
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int ndx;
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for (ndx = 1; ndx < chksum_ndx; ndx += 2)
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{
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chksum += (int)get8(&line[ndx]);
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}
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return (unsigned char)((-chksum) & 0xff);
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}
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#endif
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static void adjust_extlin(struct hex_s *hexline)
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{
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unsigned short segment;
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int chksum;
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/* Make sure that the payload is exactly 2 bytes */
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if (hexline->len != 2)
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{
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fprintf(stderr, "Bad length on extended segment address record\n");
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fprintf(stderr, " %s", line);
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}
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/* And the address field is supposed to be zero */
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if (hexline->addr != 0)
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{
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fprintf(stderr, "Bad address on extended segment address record\n");
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fprintf(stderr, " %s", line);
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}
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/* Decode the 2 byte payload */
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segment = get16(&line[PAYLOAD_OFFSET]);
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/* Convert the address to a 29-bit physical address */
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segment &= 0x1fff;
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/* Recalculate the checksum and make sure that there is a null terminator
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* Since len=2, addr=0, type=4, the is a trivial calculation.
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*/
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chksum = (-(segment + (segment >> 8) + 6)) & 0xff;
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/* Then create the new output record */
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snprintf(line, MAX_LINE-PAYLOAD_OFFSET, ":02000004%04X%02X\n", segment, chksum);
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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int main(int argc, char **argv, char **envp)
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{
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struct hex_s hexline;
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char *srcfile;
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char *destfile;
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FILE *src;
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FILE *dest;
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if (argc != 2)
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{
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fprintf(stderr, "Unexpected number of arguments\n");
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show_usage(argv[0]);
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}
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srcfile = getfilepath(argv[1], "nuttx", "hex");
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if (!srcfile)
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{
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fprintf(stderr, "getfilepath failed\n");
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exit(2);
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}
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destfile = getfilepath(argv[1], "nuttx", "tmp");
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if (!destfile)
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{
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fprintf(stderr, "getfilepath failed\n");
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exit(2);
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}
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src = fopen(srcfile, "r");
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if (!src)
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{
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fprintf(stderr, "open %s failed: %s\n", srcfile, strerror(errno));
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exit(3);
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}
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dest = fopen(destfile, "w");
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if (!dest)
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{
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fprintf(stderr, "open %s failed: %s\n", destfile, strerror(errno));
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exit(3);
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}
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/* Read each line from the source file */
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while (fgets(line, MAX_LINE, src) != NULL)
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{
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if (parse_line(&hexline))
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{
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fprintf(stderr, "Failed to parse line\n");
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exit(1);
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}
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/* Adjust 'Extended Segment Address Records'. */
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if (hexline.type == TYPE_EXTLIN)
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{
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adjust_extlin(&hexline);
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}
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fputs(line, dest);
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}
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fclose(src);
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fclose(dest);
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/* Remove the original nuttx.hex file */
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if (remove(srcfile) != 0)
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{
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fprintf(stderr, "Failed to remove the old '%s'\n", srcfile);
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}
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/* Rename the new nuttx.tmp file to nuttx.hex */
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if (rename(destfile, srcfile) != 0)
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{
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fprintf(stderr, "Failed to rename '%s' to '%s'\n", destfile, srcfile);
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}
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return 0;
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}
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