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/*
* Wi-Fi Detector opensource firmware
* Utility functions
*
* Copyright (C) 2007 Michael Buesch <mb@bu3sch.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.
*/
#include "util.h"
#include "calibration.h"
#include "main.h"
#include "lcd.h"
#include <avr/io.h>
#include <avr/eeprom.h>
#include <avr/sleep.h>
void mdelay(uint16_t msecs)
{
uint8_t timer, i;
TCCR0B = DELAY_1MS_TIMERFREQ;
do {
/* Delay one millisecond */
for (i = DELAY_1MS_LOOP_TIMES; i; i--) {
TCNT0 = 0;
do {
timer = TCNT0;
} while (timer < DELAY_1MS_LOOP);
}
} while (--msecs);
TCCR0B = 0;
}
void udelay(uint16_t usecs)
{
uint8_t tmp;
__asm__ __volatile__(
"1: \n"
" ldi %1, %2 \n"
"2: \n"
" dec %1 \n"
" brne 2b \n"
" dec %A3 \n"
" brne 1b \n"
" cp %B3, __zero_reg__ \n"
" breq 3f \n"
" dec %B3 \n"
" ldi %A3, 0xFF \n"
" rjmp 1b \n"
"3: \n"
: "=d" (usecs),
"=d" (tmp)
: "M" (DELAY_1US_LOOP),
"0" (usecs)
);
}
uint8_t eeprom_read8(const eeprom_uint8_t *addr)
{
eeprom_busy_wait();
return eeprom_read_byte((const uint8_t *)addr);
}
uint16_t eeprom_read16(const eeprom_uint16_t *addr)
{
eeprom_busy_wait();
return eeprom_read_word((const uint16_t *)addr);
}
void eeprom_write8(eeprom_uint8_t *addr, uint8_t value)
{
eeprom_busy_wait();
eeprom_write_byte((uint8_t *)addr, value);
}
void eeprom_write16(eeprom_uint16_t *addr, uint16_t value)
{
eeprom_busy_wait();
eeprom_write_word((uint16_t *)addr, value);
}
uint8_t hexdigit_to_ascii(uint8_t digit)
{
/* Convert a hexadecimal digit (0-F) to an ASCII character */
if (digit >= 0xA)
digit += 0x41 - 0xA;
else
digit += 0x30;
return digit;
}
void num16_to_ascii(uint8_t *buf, uint16_t v)
{
uint16_t orig = v;
if (orig >= 10000) {
*buf++ = v / 10000 + '0';
v %= 10000;
}
if (orig >= 1000) {
*buf++ = v / 1000 + '0';
v %= 1000;
}
if (orig >= 100) {
*buf++ = v / 100 + '0';
v %= 100;
}
if (orig >= 10) {
*buf++ = v / 10 + '0';
v %= 10;
}
*buf++ = v + '0';
*buf = '\0';
}
void panic(const prog_char *msg)
{
emergency_shutdown();
lcd_clear_buffer();
print(PSTR("Whee! PANIC :("));
lcd_charcursor(1, 0);
print(msg);
lcd_commit();
infinite_sleep();
}
void infinite_sleep(void)
{
cli();
set_sleep_mode(SLEEP_MODE_PWR_DOWN);
while (1)
sleep_mode();
}
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