Smartpins and edge events

ozpropdev

Chip
Currently we check the INx bit of the relevant smartpin to evaluate the status of the pin.
This can be done simply with TESTB and also can be captured by the streamer.
We also have the SETEDG instruction which is very nice but appears to not work with smartpins.
It would be useful to setup a smartpin as a async receiver and generate an interrupt when data is available.

Was connecting the edge detector logic to smartpins too costly in logic and/or too complex?
Just curious.

cgracey

It works! You just need to be sure that IN is lowered via PINACK before it can go high again and trigger an edge event. The whole idea was to allow interrupts. I'm thinking that I'll add one more edge event/interrupt, so that we can be responsive to more than one smart pin.

ozpropdev

Doh! <:(
Forgot PINACK
Thanks Chip.

con
	sys_clk = 80_000_000
	baudrate = 115_200
	nco_baud = round(float($1_0000) / (float(sys_clk) / float(baudrate)))
	rx_pin = 63

dat		org

		or	dirb,#$ff

		pinsetm	#%0_11111_0,#rx_pin
		pinsetx	##$8000_0000 | nco_baud << 16 | %1_00000 | 7,#rx_pin
		setb	dira+rx_pin>>5,#rx_pin

		mov	ijmp1,#rx_isr
		setedg	#%01_000000 | rx_pin
		setint1	#5 'edge event
here		jmp	#here

rx_isr		pingetz	adra,#rx_pin
		pinack	#rx_pin
		setbyte	outb,adra,#0
		reti1