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/*
* avrdude - A Downloader/Uploader for AVR device programmers
* Copyright (C) 2011 Brett Hagman
*
* 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 Wiring bootloaders
*
* http://wiring.org.co/
*
* The Wiring bootloader uses a near-complete STK500v2 protocol.
* (Only ISP specific programming commands are not implemented
* e.g. chip erase).
* DTR and RTS signals are diddled to set the board into programming mode.
*
* Also includes an extended parameter to introduce a delay after opening
* to accommodate multi-layered programmers/bootloaders. If the extended
* parameter 'snooze' > 0, then no DTR/RTS toggle takes place, and
* AVRDUDE will wait that amount of time in milliseconds before syncing.
*
* Unfortunately, there is no way to easily chain private programmer data
* when we "inherit" programmer types as we have (stk500v2). Sooooo, a
* *cringe* global variable is used to store the snooze time.
*/
#include "ac_cfg.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include "avrdude.h"
#include "libavrdude.h"
#include "stk500v2_private.h"
#include "stk500v2.h"
#include "wiring.h"
/*
* Private data for this programmer.
*/
struct wiringpdata
{
/*
* We just have the single snooze integer to carry around for now.
*/
int snoozetime;
};
/* wiringpdata is our private data */
/* pdata is stk500v2's private data (inherited) */
#define WIRINGPDATA(x) ((struct wiringpdata *)(x))
#define STK500V2PDATA(pgm) ((struct pdata *)(pgm->cookie))
static void wiring_setup(PROGRAMMER * pgm)
{
void *mycookie;
/*
* First, have STK500v2 backend allocate its own private data.
*/
stk500v2_setup(pgm);
/*
* Now prepare our data
*/
if ((mycookie = malloc(sizeof(struct wiringpdata))) == 0) {
// avrdude_message(MSG_INFO, "%s: wiring_setup(): Out of memory allocating private data\n",
// progname);
// exit(1);
avrdude_oom("wiring_setup(): Out of memory allocating private data\n");
}
memset(mycookie, 0, sizeof(struct wiringpdata));
WIRINGPDATA(mycookie)->snoozetime = 0;
/*
* Store our own cookie in a safe place for the time being.
*/
STK500V2PDATA(pgm)->chained_pdata = mycookie;
}
static void wiring_teardown(PROGRAMMER * pgm)
{
void *mycookie;
mycookie = STK500V2PDATA(pgm)->chained_pdata;
free(mycookie);
stk500v2_teardown(pgm);
}
static int wiring_parseextparms(PROGRAMMER * pgm, LISTID extparms)
{
LNODEID ln;
const char *extended_param;
int rv = 0;
void *mycookie = STK500V2PDATA(pgm)->chained_pdata;
for (ln = lfirst(extparms); ln; ln = lnext(ln)) {
extended_param = ldata(ln);
if (strncmp(extended_param, "snooze=", strlen("snooze=")) == 0) {
int newsnooze;
if (sscanf(extended_param, "snooze=%i", &newsnooze) != 1 ||
newsnooze < 0) {
avrdude_message(MSG_INFO, "%s: wiring_parseextparms(): invalid snooze time '%s'\n",
progname, extended_param);
rv = -1;
continue;
}
avrdude_message(MSG_NOTICE2, "%s: wiring_parseextparms(): snooze time set to %d ms\n",
progname, newsnooze);
WIRINGPDATA(mycookie)->snoozetime = newsnooze;
continue;
}
avrdude_message(MSG_INFO, "%s: wiring_parseextparms(): invalid extended parameter '%s'\n",
progname, extended_param);
rv = -1;
}
return rv;
}
static int wiring_open(PROGRAMMER * pgm, char * port)
{
int timetosnooze;
void *mycookie = STK500V2PDATA(pgm)->chained_pdata;
union pinfo pinfo;
strcpy(pgm->port, port);
pinfo.baud = pgm->baudrate ? pgm->baudrate: 115200;
if (serial_open(port, pinfo, &pgm->fd) < 0) {
return -1;
}
/* If we have a snoozetime, then we wait and do NOT toggle DTR/RTS */
if (WIRINGPDATA(mycookie)->snoozetime > 0) {
timetosnooze = WIRINGPDATA(mycookie)->snoozetime;
avrdude_message(MSG_NOTICE2, "%s: wiring_open(): snoozing for %d ms\n",
progname, timetosnooze);
while (timetosnooze--)
usleep(1000);
avrdude_message(MSG_NOTICE2, "%s: wiring_open(): done snoozing\n",
progname);
} else {
/* Perform Wiring programming mode RESET. */
/* This effectively *releases* both DTR and RTS. */
/* i.e. both DTR and RTS rise to a HIGH logic level */
/* since they are active LOW signals. */
avrdude_message(MSG_NOTICE2, "%s: wiring_open(): releasing DTR/RTS\n",
progname);
serial_set_dtr_rts(&pgm->fd, 0);
usleep(50*1000);
/* After releasing for 50 milliseconds, DTR and RTS */
/* are asserted (i.e. logic LOW) again. */
avrdude_message(MSG_NOTICE2, "%s: wiring_open(): asserting DTR/RTS\n",
progname);
serial_set_dtr_rts(&pgm->fd, 1);
usleep(50*1000);
}
/* drain any extraneous input */
stk500v2_drain(pgm, 0);
if (stk500v2_getsync(pgm) < 0)
return -1;
return 0;
}
static void wiring_close(PROGRAMMER * pgm)
{
serial_set_dtr_rts(&pgm->fd, 0);
serial_close(&pgm->fd);
pgm->fd.ifd = -1;
}
const char wiring_desc[] = "http://wiring.org.co/, Basically STK500v2 protocol, with some glue to trigger the bootloader.";
void wiring_initpgm(PROGRAMMER * pgm)
{
/* The Wiring bootloader uses a near-complete STK500v2 protocol. */
stk500v2_initpgm(pgm);
strcpy(pgm->type, "Wiring");
pgm->open = wiring_open;
pgm->close = wiring_close;
pgm->setup = wiring_setup;
pgm->teardown = wiring_teardown;
pgm->parseextparams = wiring_parseextparms;
}
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