Toggle digital line using counter

[sgrover]

I have a 68 pin PCI 6221. I have an input signal with pulses (~1 us long, around 10 ms apart).

I would like to convert this pulse train to a 'square wave' by toggling a digital line at the rising edge of the pulse. Is this possible?

Alternatively, can I get this square wave on the analog out port?

Can I somehow use the counter -0 rising edge as a clock source for counter-1 and use pulse generation based on ticks on counter-1?

[Kevin_Price]

Yes, you can do pulse generation based on ticks.  You need a minimum of 2 ticks each for high time and low time, so you'll end up dividing the incoming frequency by at least 4.   This will only require the use of 1 counter, I'm not sure I follow your question about combining 2 counters.

There are 2 other approaches I can only briefly outline:

1. Use a DI task set for "change detection" sampling, sensitive to the incoming rising edge.  Also set up a continuous DO task whose buffer is filled with alternating Trues and Falses.  Run DO sampling off the DI task's "change detect event".   Then every incoming rising edge causes a new DO sample to be generated, and your DO buffer defines those samples to alternately toggle the output state.   The output will be at 1/2 the frequency of the input.

2. Use a counter set for retriggerable single pulse generation.  Set pulse parameters with both low time and initial delay very minimal.  Set high time to be half the known incoming interval (i.e. 5 msec, half of 10).  This method depends on knowledge of the incoming frequency and its steadiness.  It will produce an output that's approximately square-ish but not exactly.  The output will be at the same frequency as the input.

-Kevin P