Hi i am building a measurment system based on SparkFun logomatic V2 board
https://www.sparkfun.com/products/12772
I want the system to be controlled from a screen ,for that i have an arduino mega thats connected to the display
what i need now is to connect the two boards togther i want :
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to be able to start and stop a measurment from the arduino
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to be able to acces the sd card on the logomatic from the arduino and see what files are there
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to be able to costumize the configuration file on the sd card on the logomatic
on the board i see that there are pin holes labled stop,reset,usb and also pins for SPI comunication
but i can not find any documintaion thats explained the functionality of those I\Os
on the simplest level of course i can turn the power of the logomatic on and off and by that i make new fies , but i want more control than that.