Sgonzo: Created page with "==GPIOs== ===Mapping=== In the following sheet you can find the GPIOs and their linux-number File:GPIOs.jpg ===Control=== How to control a GPIO: :{| class="wikitable"..."

2015-05-28T05:50:01Z

Created page with "==GPIOs== ===Mapping=== In the following sheet you can find the GPIOs and their linux-number File:GPIOs.jpg ===Control=== How to control a GPIO: :{| class="wikitable"..."

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==GPIOs==

===Mapping===
In the following sheet you can find the GPIOs and their linux-number
[[File:GPIOs.jpg]]

===Control===

How to control a GPIO:

:{| class="wikitable"
|1. <code>''cd /sys/class/gpio''</code>
|-
|2. create new directory: <code>''echo 44 >export ''</code>
|-
|3. go into this directory: <code>''cd gpio44''</code>
|-
|4. show if GPIO is used as an input or an output: <code>''cat direction''</code>
|-
|5. change output to '1'=high: <code>''echo 1 >value''</code>
|-
|6. change GPIO to input: <code>''echo in >direction''</code>
|-
|7. show input value: <code>''cat value''</code>
|}

==PLD==

===Development Software===
To write your own VDHL-code you can use the ispLEVER Classic Software from Lattice
([http://www.latticesemi.com/products/designsoftware/ispleverclassic/index.cfm?source=sidebar]

You also need a programmer (e.g. HW-USBN-2A from Lattice) to deploy the VHDL-Code on your PLD.

After installing the software and the drivers for your programmer you can start a new project.
===Programming example===
You can find a demo-project here:[[media:PLD-demo.zip]]

You have to download the *.jed-File with the programmer to your PLD.

In the constraint editor of ispLEVER you can define, which input X_VAR1 is.
In this example GPIO E is defined as X_VAR1. If you define GPIO E as an
output and set GPIO E high, the PLD LED should flash red.
[[File:VHDL-Code.jpg]]

Software 428-200 - Revision history

Sgonzo: Created page with "==GPIOs== ===Mapping=== In the following sheet you can find the GPIOs and their linux-number File:GPIOs.jpg ===Control=== How to control a GPIO: :{| class="wikitable"..."