Software 428-200: Difference between revisions
From Wiki-DB
Jump to navigationJump to search
(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"...") |
(No difference)
|
Latest revision as of 05:50, 28 May 2015
GPIOs
Mapping
In the following sheet you can find the GPIOs and their linux-number
Control
How to control a GPIO:
1. cd /sys/class/gpio
2. create new directory: echo 44 >export
3. go into this directory: cd gpio44
4. show if GPIO is used as an input or an output: cat direction
5. change output to '1'=high: echo 1 >value
6. change GPIO to input: echo in >direction
7. show input value: cat value
PLD
Development Software
To write your own VDHL-code you can use the ispLEVER Classic Software from Lattice ([1]
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.