Tool/software:
Hi all,
How we can get discrete signals with EMIF module. We want to read 8 Discrete signal from this module might be in the future we will use many of this module. Than I guess we will use multiplexer architecture.
If you have a example code do not hesitate to share with us.
Best Regards,
Furkan
Hi Furkan,
I created one example for EMIF pins as GIO inputs.
In this example i am reading the GIO status from EMIF data lines for every one second i am displaying corresponding values on UART terminal.
Here is the output on terminal:
As you can see when i connected GND to some terminal the corresponding value becomes zero.
On my launch pad EMIF pins were terminated to very small connector very i can't be able to distinguish pins, that is the reason i can't able to change the status of specific pins you can try at your end.
Also regarding GIO output, we can do it in similar way, just need to change the code to write into the memory. But my only concern here is that the instantaneous output of GIO may not be hold until next write
It might be hold for few clocks only like as shown below:
Just try to test it on your end and it is not possible to do this test on my setup. If output is not holding until for next write, then we might need place some latch in between EMIF data lines and other end device for output GIO lines.
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Thanks & regards,
Jagadish.
Hi Furkan,
How we can configure EMIF Address pins?
We did not see any reference about EMIF Address pins.
As per my knowledge, we cannot use address pins as GIO, because they are not bidirectional pins, and they are only outputs as shown in below:
Whereas data pins are bi-directional pins so we can use them as GIO's
And to operate data pins as GIO inputs, we no need to configure the address pins because we can just read the any address range with in EMIF to get the GIO status on data lines, so we can just ignore their configuration here.
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Thanks & regards,
Jagadish.
