OBC and PayloadGr. 732•OBC

•I2C-bus

•Com-bus

•Boot sequence

•Payload–Camera

–Lens

01gr732@control.auc.dk

http://www.control.auc.dk/~01gr732/

On Board Computer• Project assignment• OBC Interfaces

– I2C hardware– I2C Software

– Char WriteI2C(Destination, module, DataLength, *DataPointer)– Char ReadI2C( )– Boolean BufferI2C( )

– ComBus Hardware– ComBus Software

– Int StatusCom( )– Boolean BufferCom( )– Char ReadCom( )– Char WriteCom(Data)

On Board Computer• Bootsequence

– PSU as an intelligent external boot master– Boot from PROM or EEPROM– Boot timeout– PSU as watchdog

On Board Computer• Redundancy and robustness

– I2C-Bus• CRC checksum

• Header/Stop condition

– OBC• Oscillator watchdog

• Software watchdog

• Hamming code

• Boot Software Copy

Payload• Devitech

• Kodak kac-1310

• 1.3 million pixel

• 10 bit colour

• Lens:– Considerations

The Next Step• Problems

– Get a Pal unit which is OTP– Get a lens

• What we will do now– Try to get the parts we need

The End

KISSASS

Keep It Super Simple And So Stupid