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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) 2012 Bernhard Tittelbach <xro@realraum.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 "util/delay.h"
#include "led.h"
#include "spi.h"
#include "usb_rawhid.h"
#define ADCMUX_INTERNALTEMP 0b100111
#define ADCMUX_ADC12 0b100100
#define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
#define ADC_PRESCALER 0
uint8_t read_buffer[64]; // buffer for reading usb signals
uint8_t write_buffer[64]; // buffer for writing usb signals
//TODOs:
// * make as much use of sleep modes as possible
// * use adc noise canceler (i.e. automatic sampling during cpu sleep)
// * define and listen for an usb_hid reset command -> jump to bootload address
// * read atmega temp
// * safely save state in eeprom (2 memory regions, only use the one with the "written successfully bit" which is written last)
int16_t adc_read(uint8_t mux)
{
uint8_t low;
char aref = 0b11000000;
ADCSRA = (1<<ADEN) | ADC_PRESCALER; // enable ADC
ADCSRB = (1<<ADHSM) | (mux & 0x20); // high speed mode
ADMUX = aref | (mux & 0x1F); // configure mux input
ADCSRA = (1<<ADEN) | ADC_PRESCALER | (1<<ADSC); // start the conversion
while (ADCSRA & (1<<ADSC)) ; // wait for result
low = ADCL; // must read LSB first
ADCSRA &= ~(1<<ADEN); // disable ADC
return (ADCH << 8) | low; // must read MSB only once!
}
int main(void)
{
CPU_PRESCALE(0);
led_init();
spi_init();
usb_init();
// set PB5/ADC12 to INPUT (c1101 temp sensor)
DDRB &= ~(1<<DDB5);
while (!usb_configured()) /* wait */ ;
//int8_t r = usb_rawhid_recv(read_buffer, 0);
//usb_rawhid_send(write_buffer, 23);
usb_rawhid_send("hhd70dongle ready",17);
int16_t c1101_temp = adc_read(ADCMUX_ADC12);
int16_t internal_temp = adc_read(ADCMUX_INTERNALTEMP);
for(;;)
{
_delay_ms(250);
led_toggle();
c1101_temp = adc_read(ADCMUX_ADC12);
internal_temp = adc_read(ADCMUX_INTERNALTEMP);
usb_rawhid_send("temp c1101: ",12);
write_buffer[0] = '0' + c1101_temp/26;
write_buffer[1] = 0;
usb_rawhid_send(write_buffer,1);
usb_rawhid_send("temp atmega: ",13);
write_buffer[0] = '0' + internal_temp/26;
usb_rawhid_send(write_buffer,1);
char buf[10];
unsigned int len;
spi_read(sizeof(buf),buf,&len);
}
}
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