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/*
*
* mur.sat
*
* Somewhen in the year 2012, mur.at will have a nano satellite launched
* into a low earth orbit (310 km above the surface of our planet). The
* satellite itself is a TubeSat personal satellite kit, developed and
* launched by interorbital systems. mur.sat is a joint venture of mur.at,
* ESC im Labor and realraum.
*
* Please visit the project hompage at sat.mur.at for further information.
*
*
* Copyright (C) 2013 Christian Pointner <equinox@mur.at>
*
* This file is part of mur.sat.
*
* mur.sat 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 3 of the License, or
* any later version.
*
* mur.sat 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 mur.sat. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <avr/io.h>
#include <avr/wdt.h>
#include <avr/interrupt.h>
#include <avr/power.h>
#include <stdio.h>
#include "led.h"
#include "util.h"
#include "usbio.h"
#include "rda1846.h"
#define DEFAULT_FREQ 145900
int32_t current_freq_kHz = DEFAULT_FREQ;
static int32_t print_actual_freq(void)
{
int32_t f = rda1846_get_freq_kHz();
if(f < 0)
printf("actual frequency: NaN MHz");
else
printf("actual frequency: %d.%03d MHz", (uint16_t)(f / 1000), (uint16_t)(f % 1000));
return f;
}
static void update_current_freq(void)
{
printf("setting frequency to %d.%03d MHz .. ", (uint16_t)(current_freq_kHz / 1000),
(uint16_t)(current_freq_kHz % 1000));
if(rda1846_set_freq_kHz(current_freq_kHz))
printf("error\r\n");
else
printf("ok\r\n");
current_freq_kHz = print_actual_freq();
if(current_freq_kHz < 0)
current_freq_kHz = DEFAULT_FREQ;
}
static void handle_cmd(uint8_t cmd)
{
switch(cmd) {
case '0': led_off(); printf("ok\r\n"); break;
case '1': led_on(); printf("ok\r\n"); break;
case 't': led_toggle(); printf("ok\r\n"); break;
case '!': reset2bootloader(); break;
case 'f': print_actual_freq(); break;
case '+': current_freq_kHz+=500; update_current_freq(); break;
case '-': current_freq_kHz-=500; update_current_freq(); break;
default: printf("ERROR: unknown command\r\n"); return;
}
}
int main(void)
{
MCUSR &= ~(1 << WDRF);
wdt_disable();
cpu_init();
led_init();
usbio_init();
sei();
rda1846_init();
rda1846_set_freq_kHz(current_freq_kHz);
for(;;) {
int16_t BytesReceived = usbio_bytes_received();
while(BytesReceived > 0) {
int ReceivedByte = fgetc(stdin);
if(ReceivedByte != EOF) {
handle_cmd(ReceivedByte);
}
BytesReceived--;
}
usbio_task();
}
}
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