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SPACEDOS

Physical dimensions

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Electrical interface

Signal	Description
PC7	Universal IO pin
PC3	Universal IO pin
RX0	RS232 Receive (3.3 V)
TX0	RS232 Transmit (3.3 V)
RST#	Reset (trough capacitor)
GND	Ground
3V3	Power supply +3.3 V
5V	Internally connected to +3.3 V

Communication protocol

Sample of output data

#Cvak...
#Hmmm...
$DPSD,0000000e,660b,0000,0000,0000,0000,0000,0000,0000,0000,0102
$HKSD,0,14,36049,256,0,3363,26123,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
$DPSD,0000001e,67f7,0000,0001,0000,0000,0000,0000,0000,0000,0102
$HKSD,1,30,35924,256,0,2995,26615,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

SPACEDOS sends $DPSD a $HKSD messages each cca 15 seconds. Communication speed is 2400 baud.

Power On

#Cvak…

Initiation complete

#Hmmm...

Initiation is completed up to one second.

SpaceDos Data Payload

$DPSD, uptime, noise channel, 0.1 MeV, 0.14 MeV, 0.21 MeV, 0.33 MeV, 0.66 MeV, 1.68 MeV, 4.72 MeV, >=9 MeV, DC offset

Value	Length	Type	Note
$DPSD	5 B	Char	Header
uptime	4 B	Hex	Time from power on
noise channel	2 B	Hex	this channel containing noise
0.1 MeV	2 B	Hex	number of particles with absorbed energy above 0.1 MeV
...	...	...
'>=9' MeV	2 B	Hex	Overrange particles
DC offset	2 B	Hex	Offset of ADC

SpaceDos HouseKeeping

$HKSD, measurement No. , uptime, filter suppressions, position of the 1-st channel, 1-st ch., 2-nd ch., 3-rd ch.,...

Value	Range	type	Note
$HKSD	fix	Char	Header
measurement No.	0..65535	Dec
uptime	0..4294967295	Dec
filter suppressions	0..65535	Dec	Number of ussage of digital filter for double peak suppression
position of the 1-st channel	0..511	Dec
1-st ch.	0..65535	Dec	Number of events in 1-st ch.
2-nd ch.	0..65535	Dec	Number of events in 2-nd ch.
...	...