hello i am trying to establish SPI connection of IOIO with a PIC18f452
microcontroller but had failed to do so. i wanted to send a series of value
to the pic for processing for starter i try with a value to see my
understanding of the process and operation is correct.
This is the code of the IOIO side:
public void loop() throws ConnectionLostException {
spi = ioio_.openSpiMaster(12, 13, 14, 10, SpiMaster.Rate.RATE_1M);
byte0[0] = (byte) 127;
byte1[0] = (byte) 0x00;
button1_.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
try {
spi.writeRead(byte0, byte0.length, 1, byte1, byte1.length);
} catch (ConnectionLostException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
}
Toast.makeText(getApplicationContext(),String.valueOf(byte0[0]),
Toast.LENGTH_LONG).show();
}
});
}
And this is the code of the pic18f452 side:
void main(void)
{
TRISD = 0x00;
TRISA = 0xFF;
PORTD = 0x00;
TRISCbits.TRISC3 = 1; //SCK clock
TRISCbits.TRISC4 = 1; // DATA IN
TRISCbits.TRISC5 = 0; // DATA OUT
OpenSPI(SLV_SSON, MODE_10, SMPMID);
while(!DataRdySPI()); //check whether it is data at buffer bus is ready
resultant = SSPBUF;
Delay10KTCYx(500);
while(1)
{
PORTD = resultant;
Delay10KTCYx(500);
}
}
i use LED at portd to check whether it is producing the result that i
expected but it seems the PIC doesnt receive the data as the LED doesnt lit
at all, i wonder is it the Mode and phase setting of the PIC cause this ?
Please Help
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