debugging test attempts

git-svn-id: https://svn.spreadspace.org/mur.sat@418 7de4ea59-55d0-425e-a1af-a3118ea81d4c

10 files changed, 353 insertions, 161 deletions

diff --git a/software/hhd70dongle/Makefile b/software/hhd70dongle/Makefile
index 80c92b8..c12e4c6 100644
--- a/software/hhd70dongle/Makefile
+++ b/software/hhd70dongle/Makefile
@@ -1,28 +1,36 @@
-##

-##  spreadspace teensy utils

-##

-##

-##  Copyright (C) 2011 Christian Pointner <equinox@spreadspace.org>

-##                         

-##  This file is part of spreadspace teensy utils.

-##

-##  spreadspace teensy utils 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.

-##

-##  spreadspace teensy utils 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 spreadspace teensy utils. If not, see <http://www.gnu.org/licenses/>.

-##

-

-NAME := hhd70dongle

-OBJ := hhd70dongle.o led.o spi.o usb_rawhid.o c1101lib.o

-BOARD_TYPE := teensy2

-

-include ../teensy.include.mk

-CFLAGS += -std=gnu99

+##
+##  spreadspace teensy utils
+##
+##
+##  Copyright (C) 2011 Christian Pointner <equinox@spreadspace.org>
+##                         
+##  This file is part of spreadspace teensy utils.
+##
+##  spreadspace teensy utils 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.
+##
+##  spreadspace teensy utils 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 spreadspace teensy utils. If not, see <http://www.gnu.org/licenses/>.
+##
+
+NAME := hhd70dongle
+OBJ := hhd70dongle.o led.o spi.o usb_rawhid.o c1101lib.o util.o
+BOARD_TYPE := teensy2
+
+include ../teensy.include.mk
+CFLAGS += -std=gnu99
+
+DFU_PRO_TARGET := atmega32u4
+
+.phony: flash
+flash: $(NAME).hex
+	sudo dfu-programmer $(DFU_PRO_TARGET) erase
+	sudo dfu-programmer $(DFU_PRO_TARGET) flash $<
+	sudo dfu-programmer $(DFU_PRO_TARGET) start
diff --git a/software/hhd70dongle/c1101lib.c b/software/hhd70dongle/c1101lib.c
index 26d5fb9..8f9f5a7 100644
--- a/software/hhd70dongle/c1101lib.c
+++ b/software/hhd70dongle/c1101lib.c
@@ -29,25 +29,43 @@
  *  along with mur.sat. If not, see <http://www.gnu.org/licenses/>.
  *
  */
-#include "avr/io.h"
-#include "util/delay.h"
+#include <avr/io.h>
+#include <util/delay.h>
 
 #include "c1101lib.h"
 #include "spi.h"
-//#include "usb_rawhid.h"
+#include "usb_rawhid.h"
+#include "util.h"
 
 /**** Helper Functions ****/
 
+#define SPIC1101_MAX_WAIT 1024
+unsigned int attempts = 0;
 char spi_c1101_exchange(char *data, int len)
 {
+    char sb;
+    uint8_t debug_sb[6];
     char rbyte;
     spi_cs_enable();
-    while (len--)
+    attempts = 0;
+    while (len-- > 0)
     {
-        while ( ! (SPIC1101_SB_CHIPRDY(spi_read_byte())));
+        //~ while ( ! (SPIC1101_SB_CHIPRDY(spi_read_byte())));
         spi_write_byte(*(data++));
+        usb_rawhid_send((uint8_t*)"spi byte written",255);        
+        do
+        {
+            usb_rawhid_send((uint8_t*)"wait chipready",255);
+            sb = spi_read_byte();
+            debug_sprint_int16hex(debug_sb, sb);
+            usb_rawhid_send(debug_sb,255);
+            if (attempts++ > SPIC1101_MAX_WAIT)
+                return -1;
+        } while ( ! (SPIC1101_SB_CHIPRDY(sb)));
+        usb_rawhid_send((uint8_t*)"spi chipready",255);
     }
     rbyte = spi_read_byte();
+    usb_rawhid_send((uint8_t*)"spi byte read",255);
     spi_cs_disable();
     return rbyte;
 }
@@ -133,8 +151,19 @@ int spi_c1101_write_txfifo(char *buffer, int len)
 /**** External Functions ****/
 
 
+char c1101_getVersion(void)
+{
+    return spi_c1101_read_register(SPIC1101_ADDR_VERSION);
+}
+
+char c1101_getPartNum(void)
+{
+    return spi_c1101_read_register(SPIC1101_ADDR_PARTNUM);
+}
+
+
 //max len: 64 bytes
-void writeTXFifo(char *buffer, unsigned int len)
+void c1101_writeTXFifo(char *buffer, unsigned int len)
 {
     //check TXBYTES.NUM_TXBYTES
     // never write more bytes than avaiblabe or doom ensues
@@ -143,7 +172,7 @@ void writeTXFifo(char *buffer, unsigned int len)
 }
 
 //max returned: 64 bytes
-int readRXFifo(char *buffer)
+int c1101_readRXFifo(char *buffer)
 {
     //check RXBYTES.NUM_RXBYTES
     // never read more bytes than avaiblabe or we will read garbage
diff --git a/software/hhd70dongle/c1101lib.h b/software/hhd70dongle/c1101lib.h
index 7224a61..64cf876 100644
--- a/software/hhd70dongle/c1101lib.h
+++ b/software/hhd70dongle/c1101lib.h
@@ -114,31 +114,33 @@
 #define SPIC1101_ADDR_RCCTRL1_STATUS (0x3C | 0xC0)
 #define SPIC1101_ADDR_RCCTRL0_STATUS (0x3D | 0xC0)
 
-
 #define SPIC1101_ADDR_FIFO_READ (0x3F | 0x80)
 #define SPIC1101_ADDR_FIFO_READ_BURST (0x3F | 0x80 | 0xC0)
 #define SPIC1101_ADDR_FIFO_WRITE 0x3F
 #define SPIC1101_ADDR_FIFO_WRITE_BURST (0x3F | 0x40)
 
-#define SPIC1101_SB_CHIPRDY(x) x & 0b1000000
-#define SPIC1101_SB_IDLE(x) (x & 0b0111000) == 0b000000
-#define SPIC1101_SB_RXMODE(x) (x & 0b0111000) == 0b001000
-#define SPIC1101_SB_TXMODE(x) (x & 0b0111000) == 0b010000
-#define SPIC1101_SB_FSTXON(x) (x & 0b0111000) == 0b011000
-#define SPIC1101_SB_CALIBRATE(x) (x & 0b0111000) == 0b100000
-#define SPIC1101_SB_SETTLING(x) (x & 0b0111000) == 0b101000
-#define SPIC1101_SB_RXFIFO_OVERFLOW(x) (x & 0b0111000b) == 0b110000
-#define SPIC1101_SB_TXFIFO_OVERFLOW(x) (x & 0b0111000b) == 0b111000
-#define SPIC1101_SB_FIFO_BYTES_AVAILABLE(x) (x & 0b0000111)
+#define SPIC1101_SB_CHIPRDY(x) x & 0b10000000
+#define SPIC1101_SB_IDLE(x) (x & 0b01110000) == 0
+#define SPIC1101_SB_RXMODE(x) (x & 0b01110000) == 0b0010000
+#define SPIC1101_SB_TXMODE(x) (x & 0b01110000) == 0b0100000
+#define SPIC1101_SB_FSTXON(x) (x & 0b01110000) == 0b0110000
+#define SPIC1101_SB_CALIBRATE(x) (x & 0b01110000) == 0b1000000
+#define SPIC1101_SB_SETTLING(x) (x & 0b01110000) == 0b1010000
+#define SPIC1101_SB_RXFIFO_OVERFLOW(x) (x & 0b01110000) == 0b1100000
+#define SPIC1101_SB_TXFIFO_OVERFLOW(x) (x & 0b01110000) == 0b1110000
+#define SPIC1101_SB_FIFO_BYTES_AVAILABLE(x) (x & 0b00001111)
+
 
+char c1101_getVersion(void);
+char c1101_getPartNum(void);
 
 //max len: 64 bytes
-void writeTXFifo(char *buffer, unsigned int len);
+void c1101_writeTXFifo(char *buffer, unsigned int len);
 
 //max returned: 64 bytes
-int readRXFifo(char *buffer);
+int c1101_readRXFifo(char *buffer);
 
 //set WakeOnRadio to enabled (true) or disabled(false)
-void setWOR(int enable);
+void c1101_setWOR(int enable);
 
 #endif
diff --git a/software/hhd70dongle/hhd70dongle.c b/software/hhd70dongle/hhd70dongle.c
index 7e11d45..3d7fa95 100644
--- a/software/hhd70dongle/hhd70dongle.c
+++ b/software/hhd70dongle/hhd70dongle.c
@@ -1,104 +1,97 @@
-/*

- *

- *  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);

-    }

-}

+/*
+ *
+ *  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 <avr/stdio.h>
+
+#include "led.h"
+#include "util.h"
+#include "spi.h"
+#include "c1101lib.h"
+#include "usb_rawhid.h"
+
+#define ADCMUX_INTERNALTEMP 0b100111
+#define ADCMUX_ADC12 0b100100
+
+#define CPU_PRESCALE(n)	(CLKPR = 0x80, CLKPR = (n))
+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)
+
+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((uint8_t*)"hhd70dongle ready",17);
+     
+    for(;;) 
+    {
+        _delay_ms(250);
+        led_toggle();
+        usb_rawhid_recv(read_buffer,20);
+        if (read_buffer[0] == 'r')
+            reset();
+        usb_rawhid_send((uint8_t*)"temp c1101:",255);
+        debug_sprint_int16hex(write_buffer, adc_read(ADCMUX_ADC12));
+        usb_rawhid_send(write_buffer,255);
+        _delay_ms(250);
+        usb_rawhid_send((uint8_t*)"temp atmega:",255);
+        debug_sprint_int16hex(write_buffer, adc_read(ADCMUX_INTERNALTEMP));
+        usb_rawhid_send(write_buffer,255);
+        _delay_ms(250);
+        usb_rawhid_send((uint8_t*)"c1101 partnum:",255);
+        debug_sprint_int16hex(write_buffer, c1101_getPartNum());
+        usb_rawhid_send(write_buffer,255);
+        _delay_ms(250);
+        usb_rawhid_send((uint8_t*)"c1101 version:",255);
+        debug_sprint_int16hex(write_buffer, c1101_getVersion());
+        usb_rawhid_send(write_buffer,255);
+        //~ char buf[10];
+        //~ unsigned int len;
+        //~ spi_read(sizeof(buf),buf,&len);
+    }
+}
diff --git a/software/hhd70dongle/pcusbhid/Makefile b/software/hhd70dongle/pcusbhid/Makefile
index c6689ed..cd0f018 100644
--- a/software/hhd70dongle/pcusbhid/Makefile
+++ b/software/hhd70dongle/pcusbhid/Makefile
@@ -35,8 +35,7 @@ endif
 
 OBJS = $(PROG).o hid.o
 
-
-all: $(TARGET)
+all: $(TARGET) reset
 
 $(PROG): $(OBJS)
 	$(CC) -o $(PROG) $(OBJS) $(LIBS)
@@ -53,6 +52,10 @@ $(PROG).dmg: $(PROG)
 hid.o: hid_$(OS).c hid.h
 	$(CC) $(CFLAGS) -c -o $@ $<
 
+reset: reset.o hid.o
+	$(CC) -o $@ $+ $(LIBS)
+	$(STRIP) $@
+
 reset.o: reset.c
 	$(CC) $(CFLAGS) -c -o $@ $<
 
diff --git a/software/hhd70dongle/pcusbhid/rawhid_testinterface.c b/software/hhd70dongle/pcusbhid/rawhid_testinterface.c
index 8f19c4f..1d47daa 100644
--- a/software/hhd70dongle/pcusbhid/rawhid_testinterface.c
+++ b/software/hhd70dongle/pcusbhid/rawhid_testinterface.c
@@ -59,18 +59,17 @@ int main (int argc, char *argv[])
     
     while (1)
     {
-        num = rawhid_recv(0, buf, BUF_LEN, 220);
+        num = rawhid_recv(0, buf, BUF_LEN, 250);
         if (num < 0)
         {
             printf("\nerror reading, device went offline\n");
             rawhid_close(0);
             return 0;
         }
-        else if (num == 0)
+        if (num > 0)
         {
-            sleep(1.0);
+            buf[num]='\0';
+            printf("%s\n",buf);
         }
-        buf[num]='\0';
-        printf("%s\n",buf);
     }
 }
diff --git a/software/hhd70dongle/pcusbhid/reset.c b/software/hhd70dongle/pcusbhid/reset.c
new file mode 100644
index 0000000..7955b1b
--- /dev/null
+++ b/software/hhd70dongle/pcusbhid/reset.c
@@ -0,0 +1,22 @@
+#include <stdio.h>
+#include <string.h>
+
+#include "hid.h"
+
+
+void sendstr(char * tosend)
+{
+    rawhid_send(0, tosend, strlen(tosend),1000);
+}
+
+int main (int argc, char *argv[])
+{
+    // C-based example is 16C0:0480:FFAB:0200
+    int r = rawhid_open(1, 0x16C0, 0x0481, 0xFFAB, 0x0200);
+    if (r <= 0) {
+        printf("no rawhid device found\n");
+        return -1;
+    }
+    sendstr("r"); // clear the buffer  
+    return 0;
+}
diff --git a/software/hhd70dongle/spi.c b/software/hhd70dongle/spi.c
index c7172ce..e676fbf 100644
--- a/software/hhd70dongle/spi.c
+++ b/software/hhd70dongle/spi.c
@@ -70,7 +70,6 @@ void spi_cs_disable(void)
 }
 
 //synchronous
-//MSB first
 void spi_write_byte(char byte)
 {
     SPDR = byte;					//Load byte to Data register
diff --git a/software/hhd70dongle/util.c b/software/hhd70dongle/util.c
new file mode 100644
index 0000000..b1f7e85
--- /dev/null
+++ b/software/hhd70dongle/util.c
@@ -0,0 +1,96 @@
+/*
+ *
+ *  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 <avr/interrupt.h>
+#include <util/delay.h>
+#include "util.h"
+
+void reset(void)
+{
+  cli();
+  // disable watchdog, if enabled
+  // disable all peripherals
+  UDCON = 1;
+  USBCON = (1<<FRZCLK);  // disable USB
+  UCSR1B = 0;
+  _delay_ms(5);
+  #if defined(__AVR_AT90USB162__)                // Teensy 1.0
+      EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0;
+      TIMSK0 = 0; TIMSK1 = 0; UCSR1B = 0;
+      DDRB = 0; DDRC = 0; DDRD = 0;
+      PORTB = 0; PORTC = 0; PORTD = 0;
+      asm volatile("jmp 0x3E00");
+  #elif defined(__AVR_ATmega32U4__)              // Teensy 2.0
+      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;
+      asm volatile("jmp 0x7E00");
+  #elif defined(__AVR_AT90USB646__)              // Teensy++ 1.0
+      EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
+      TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; UCSR1B = 0; TWCR = 0;
+      DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0;
+      PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
+      asm volatile("jmp 0xFC00");
+  #elif defined(__AVR_AT90USB1286__)             // Teensy++ 2.0
+      EIMSK = 0; PCICR = 0; SPCR = 0; ACSR = 0; EECR = 0; ADCSRA = 0;
+      TIMSK0 = 0; TIMSK1 = 0; TIMSK2 = 0; TIMSK3 = 0; UCSR1B = 0; TWCR = 0;
+      DDRA = 0; DDRB = 0; DDRC = 0; DDRD = 0; DDRE = 0; DDRF = 0;
+      PORTA = 0; PORTB = 0; PORTC = 0; PORTD = 0; PORTE = 0; PORTF = 0;
+      asm volatile("jmp 0x1FC00");
+  #endif 
+}
+
+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!
+}
+
+void debug_sprint_int16hex(uint8_t *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;
+}
\ No newline at end of file
diff --git a/software/hhd70dongle/util.h b/software/hhd70dongle/util.h
new file mode 100644
index 0000000..870cf3f
--- /dev/null
+++ b/software/hhd70dongle/util.h
@@ -0,0 +1,41 @@
+/*
+ *
+ *  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/>.
+ *
+ */
+
+#ifndef MURSAT_util_h_INCLUDED
+#define MURSAT_util_h_INCLUDED
+#define ADC_PRESCALER 0
+
+void reset(void);
+int16_t adc_read(uint8_t mux);
+void debug_sprint_int16hex(uint8_t *buffer, int16_t num);
+
+#endif