ok, a PIC is connected to the IOIO through SPI, i create a button on the Eclipse side to call the writeRead() and print the value of response when clicked and the pic would capture the data from the spi and display on the 8 led, i assign 2 different value,15 and 40 to the request array and the pic will capture the 2 value, store it in a variable and toggle the led for a second between the 15 and 40, this is what i expected to see. instead the pic only take the 1st value for both of the variable and the led did not toggle, they stay constant to represent the value 15, when i clicked the button second time the value printed out are 15 so i am thinking the second byte did not pass through, and the value of first byte stay in the PIC buffer are sent back as response
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