interrupt word read from 32 bit buffered port

[stefanharjes]

Hi there,

I use the simple loop:

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while(1) {
		start_clock(ltc.blk);
		//read value from 'in buffered port:32'
		ltc.miso :> wert;
		//stop clocking
		stop_clock(ltc.blk);
}

to read a adc @50MHz using spi. However, I only need the first 18bits from the device. Is it possible to interrupt the read and simply read out the fifo after a certain time? I saw the

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{twidth_t, counter_t} getHead(FIFO f)

function in the IO specification. Anyone used that and would care to share a usage example?

Best regards
Stefan

[Ross]

Is the input port a 1-bit port?

You can use the partin() function (see xs1.h)