avrdude/src/stk500generic.c

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/*
* avrdude - A Downloader/Uploader for AVR device programmers
* Copyright (C) 2006 Joerg Wunsch <j@uriah.heep.sax.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* $Id$ */
/*
* avrdude interface for Atmel STK500 programmer
*
* This is a wrapper around the STK500[v1] and STK500v2 programmers.
* Try to select the programmer type that actually responds, and
* divert to the actual programmer implementation if successful.
*/
#include "ac_cfg.h"
#include <stdio.h>
#include <string.h>
#include "avrdude.h"
#include "libavrdude.h"
#include "stk500generic.h"
#include "stk500.h"
#include "stk500v2.h"
Use const in PROGRAMMER function arguments where appropriate In order to get meaningful const properties for the PROGRAMMER, AVRPART and AVRMEM arguments, some code needed to be moved around, otherwise a network of "tainted" assignments risked rendering nothing const: - Change void (*enable)(PROGRAMMER *pgm) to void (*enable)(PROGRAMMER *pgm, const AVRPART *p); this allows changes in the PROGRAMMER structure after the part is known. For example, use TPI, UPDI, PDI functions in that programmer appropriate to the part. This used to be done later in the process, eg, in the initialize() function, which "taints" all other programmer functions wrt const and sometimes requires other finessing with flags etc. Much clearer with the modified enable() interface. - Move TPI initpgm-type code from initialize() to enable() --- note that initpgm() does not have the info at the time when it is called whether or not TPI is required - buspirate.c: move pgm->flag to PDATA(pgm)->flag (so legitimate modification of the flag does not change PROGRAMMER structure) - Move AVRPART_INIT_SMC and AVRPART_WRITE bits from the flags field in AVRPART to jtagmkII.c's private data flags32 fiels as FLAGS32_INIT_SMC and FLAGS32_WRITE bits - Move the xbeeResetPin component to private data in stk500.c as this is needed by xbee when it saddles on the stk500 code (previously, the flags component of the part was re-dedicated to this) - Change the way the "chained" private data are used in jtag3.c whilst keeping the PROGRAMMER structure read-only otherwise - In stk500v2.c move the STK600 pgm update from stk500v2_initialize() to stk500v2_enable() so the former keeps the PROGRAMMER structure read-only (for const assertion). - In usbasp change the code from changing PROGRAMMER functions late to dispatching to TPI or regular SPI protocol functions at runtime; reason being the decision whether to use TPI protocol is done at run-time depending on the capability of the attached programmer Also fixes Issue #1071, the treatment of default eecr value.
2022-08-17 15:05:28 +00:00
static int stk500generic_open(PROGRAMMER *pgm, const char *port) {
stk500_initpgm(pgm);
if (pgm->open(pgm, port) >= 0)
{
avrdude_message(MSG_INFO, "%s: successfully opened stk500v1 device -- please use -c stk500v1\n",
progname);
return 0;
}
pgm->close(pgm);
stk500v2_initpgm(pgm);
if (pgm->open(pgm, port) >= 0)
{
avrdude_message(MSG_INFO, "%s: successfully opened stk500v2 device -- please use -c stk500v2\n",
progname);
return 0;
}
avrdude_message(MSG_INFO, "%s: cannot open either stk500v1 or stk500v2 programmer\n",
progname);
return -1;
}
static void stk500generic_setup(PROGRAMMER * pgm)
{
/*
* Only STK500v2 needs setup/teardown.
*/
stk500v2_initpgm(pgm);
pgm->setup(pgm);
}
static void stk500generic_teardown(PROGRAMMER * pgm)
{
stk500v2_initpgm(pgm);
pgm->teardown(pgm);
}
const char stk500generic_desc[] = "Atmel STK500, autodetect firmware version";
Use const in PROGRAMMER function arguments where appropriate In order to get meaningful const properties for the PROGRAMMER, AVRPART and AVRMEM arguments, some code needed to be moved around, otherwise a network of "tainted" assignments risked rendering nothing const: - Change void (*enable)(PROGRAMMER *pgm) to void (*enable)(PROGRAMMER *pgm, const AVRPART *p); this allows changes in the PROGRAMMER structure after the part is known. For example, use TPI, UPDI, PDI functions in that programmer appropriate to the part. This used to be done later in the process, eg, in the initialize() function, which "taints" all other programmer functions wrt const and sometimes requires other finessing with flags etc. Much clearer with the modified enable() interface. - Move TPI initpgm-type code from initialize() to enable() --- note that initpgm() does not have the info at the time when it is called whether or not TPI is required - buspirate.c: move pgm->flag to PDATA(pgm)->flag (so legitimate modification of the flag does not change PROGRAMMER structure) - Move AVRPART_INIT_SMC and AVRPART_WRITE bits from the flags field in AVRPART to jtagmkII.c's private data flags32 fiels as FLAGS32_INIT_SMC and FLAGS32_WRITE bits - Move the xbeeResetPin component to private data in stk500.c as this is needed by xbee when it saddles on the stk500 code (previously, the flags component of the part was re-dedicated to this) - Change the way the "chained" private data are used in jtag3.c whilst keeping the PROGRAMMER structure read-only otherwise - In stk500v2.c move the STK600 pgm update from stk500v2_initialize() to stk500v2_enable() so the former keeps the PROGRAMMER structure read-only (for const assertion). - In usbasp change the code from changing PROGRAMMER functions late to dispatching to TPI or regular SPI protocol functions at runtime; reason being the decision whether to use TPI protocol is done at run-time depending on the capability of the attached programmer Also fixes Issue #1071, the treatment of default eecr value.
2022-08-17 15:05:28 +00:00
void stk500generic_initpgm(PROGRAMMER *pgm) {
strcpy(pgm->type, "STK500GENERIC");
pgm->open = stk500generic_open;
pgm->setup = stk500generic_setup;
pgm->teardown = stk500generic_teardown;
}