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/*
* (C) Copyright 2014 Leo C. <erbl259-lmu@yahoo.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include "common.h"
#include <string.h>
#include <avr/wdt.h>
#include "config.h"
#include "serial.h"
#include "background.h"
#include "con-utils.h"
uint_fast8_t tstc(void)
{
bg_shed();
return serial_tstc();
}
int my_getchar(uint_fast8_t waitforchar)
{
int c;
do {
bg_shed();
c = serial_getc();
} while ((c < 0) && waitforchar);
#ifdef CONFIG_SYS_FBOOTSIG
if (c < 0)
return c;
static const FLASH unsigned char bootsig[] = {CONFIG_SYS_FBOOTSIG};
static uint8_t pb;
unsigned char uc = c;
if (bootsig[pb] == 0) {
if (uc == 0xff) {
wdt_enable(WDTO_15MS);
for(;;)
;
} else
pb = 0;
} else {
if (bootsig[pb] == uc)
pb++;
else
pb = 0;
}
#endif
return c;
}
/* test if ctrl-c was pressed */
static uint_fast8_t ctrlc_disabled; /* see disable_ctrl() */
static uint_fast8_t ctrlc_was_pressed;
uint_fast8_t ctrlc(void)
{
bg_shed();
if (!ctrlc_disabled) {
switch (serial_getc()) {
case 0x03: /* ^C - Control C */
ctrlc_was_pressed = 1;
return 1;
default:
break;
}
}
return 0;
}
/* Reads user's confirmation.
Returns 1 if user's input is "y", "Y", "yes" or "YES"
*/
uint_fast8_t confirm_yesno(void)
{
unsigned int i;
char str_input[5];
/* Flush input */
while (serial_getc())
;
i = 0;
while (i < sizeof(str_input)) {
str_input[i] = my_getchar(1);
putchar(str_input[i]);
if (str_input[i] == '\r')
break;
i++;
}
putchar('\n');
if (strncmp(str_input, "y\r", 2) == 0 ||
strncmp(str_input, "Y\r", 2) == 0 ||
strncmp(str_input, "yes\r", 4) == 0 ||
strncmp(str_input, "YES\r", 4) == 0)
return 1;
return 0;
}
/* pass 1 to disable ctrlc() checking, 0 to enable.
* returns previous state
*/
uint_fast8_t disable_ctrlc(uint_fast8_t disable)
{
uint_fast8_t prev = ctrlc_disabled; /* save previous state */
ctrlc_disabled = disable;
return prev;
}
uint_fast8_t had_ctrlc (void)
{
return ctrlc_was_pressed;
}
void clear_ctrlc(void)
{
ctrlc_was_pressed = 0;
}
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