1 files changed, 87 insertions, 0 deletions
diff --git a/software/hhd70dongle.old/util.c b/software/hhd70dongle.old/util.c
new file mode 100644
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+++ b/software/hhd70dongle.old/util.c
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+/*
+ *
+ *  mur.sat
+ *
+ *  Somewhen in the year 20xx, 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 <avr/interrupt.h>
+#include <util/delay.h>
+#include "util.h"
+
+typedef void (*f_ptr_type)(void);
+f_ptr_type start_bootloader = (f_ptr_type)0x3800;
+
+void reset(void)
+{
+  cli();
+  // disable watchdog, if enabled
+  // disable all peripherals
+  UDCON = 1;
+  USBCON = (1<<FRZCLK);  // disable USB
+  UCSR1B = 0;
+  _delay_ms(5);
+  EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
+  TIMSK0 = 0; TIMSK1 = 0; TIMSK3 = 0; TIMSK4 = 0; UCSR1B = 0; TWCR = 0;
+  DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0; TWCR = 0;
+  PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
+  start_bootloader(); 
+}
+
+//not switchin off adc produces slightly besser results
+void adc_on(void)
+{
+    ADCSRA = (1<<ADEN) | 0b00000111;                // enable ADC, Prescaler 1:128
+}
+
+void adc_off(void)
+{
+    ADCSRA &= ~(1<<ADEN);                           // disable ADC -> save power
+}
+
+uint8_t adc_read(uint8_t mux)
+{
+    ADCSRB = (mux & 0x20);                          // select input 
+    ADMUX = 0b11100000 | (mux & 0x1F);              // select input cont'd
+                                                    // select internal 2.56V reference,
+                                                    // result is left justified
+    ADCSRA |= (1<<ADSC);                            // start the conversion
+    while (ADCSRA & (1<<ADSC)) ;                    // wait for result
+    return ADCH;
+}
+
+void debug_sprint_int16hex(char *buffer, int16_t num)
+{
+    int c,n;
+    for (c=0; c<4; c++)
+    {
+        n = (num >> (3-c)*4 ) & 15;
+        buffer[c] = n + ((n < 10) ? '0' : 'A' - 10);
+    }
+    buffer[4]=0;
+}