misc.c

at51系列单片机编程源码

/* ----------------------------------------------------------------------------
 * misc.c
 * this module contains misc functions
 *
 * Copyright 2003/2004
 *
 * 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.
 * ----------------------------------------------------------------------------*/
#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
#include <signal.h>
#include <string.h>
#include <termios.h>
#include "isp-at89.h"

extern struct ProgrammingData pd;

/* Signal handler stuff */
void
signalhandler (int signum)
{
	printf("\n");
	setTerminal(&pd, 0);  /* restore terminal settings */
	exit(1);             /* exit the program */
}

int
installSighandler()
{
	struct sigaction sa = { {signalhandler}, {{0}}, SA_RESTART, 0 };
	if (sigaction (SIGINT, &sa, NULL)) {
		printf (_("-- ERROR: cannot install SIGINT handler\n"));
		return ERROR;
	}
	if (sigaction (SIGTERM, &sa, NULL)) {
		printf (_("-- ERROR: cannot install SIGTERM handler\n"));
		return ERROR;
	}
	return OK;
}

/* Set the Terminal to Non Canonical mode with echo off
 * or reset the terminal.
 * USAGE: set_terminal(1) for raw mode
 */
void
setTerminal(struct ProgrammingData *pdata, int raw)
{
	struct termios newcfg;

	if (raw){
		/* save original settings and set raw mode*/
		tcgetattr(fileno(stdin), &pdata->oldcfg);
		newcfg = pdata->oldcfg;
		newcfg.c_lflag &= ~ICANON;
		if (tcsetattr(fileno(stdin), TCSANOW, &newcfg) !=0)
			printf(_("-- WARNING: could not set terminal attributes on stdin\n"));
		else
			pdata->flags.rawterm = 1;
	} else if (pdata->flags.rawterm)
			tcsetattr(fileno(stdin), TCSANOW, &pdata->oldcfg); /* restore settings */
}

int
getFileStatus (char *file)
{
	struct stat stat_buf;

	if (file[0] == 0)     /* file is empty */
		return FST_NOARG;
	if(stat(file, &stat_buf)) {
		return FST_NOEXIST;
	} else {
		if (S_ISCHR(stat_buf.st_mode))
			return FST_CHARDEV;
		if (S_ISBLK(stat_buf.st_mode))
			return FST_BLKDEV;
		if (S_ISREG(stat_buf.st_mode))
			return FST_FILE;
	}
	return FST_UNKNOWN;
}

/* This function prints the current configuration to terminal.
 */
void
printFlags (struct ProgrammingData *pdata)
{
	printf(_("   Additional options: "));
	if (pdata->flags.erase == 1) {
		printf(_("preceding memory erase"));
		if (pdata->flags.verify == 1) {
			printf(",");
			printf(_(" verify"));
		}
	} else if (pdata->flags.verify == 1)
		printf(_(" verify"));
	else
		printf(_(" none"));
	printf(".\n");
}

/* This function decodes the given memory type and returns its name.
 * isp-at89.h defines which memory types are available.
 */
const char *
getMemoryName(int type)
{
	static const char *MemNames[] = {
		N_("internal flash memory"),
		N_("external flash memory"),
		N_("EEPROM")};

	return _(MemNames[type & 0x3]);
}

/* This function decodes the given memory type and returns its
 * size in bytes. isp-at89.h defines which memory types are available.
 */
int
getMemorySize(int type)
{
	switch (type) {
	case MEM_EXTERN:
		/* This value should be evaluated from the real existing
		 * external memory later
		 */
		return AT89S8252_MEMSIZE_EXTERN;
	case MEM_EEPROM:
		return AT89S8252_MEMSIZE_EEPROM;
	case MEM_INTERN:
	default:
		return AT89S8252_MEMSIZE_INTERN;
	}
}