|
|
| Line 11: |
Line 11: |
| | | | |
| | == Setup == | | == Setup == |
| − |
| |
| − |
| |
| − |
| |
| − | == Usage and Behavior ==
| |
| | | | |
| | ===Hardware Requirements=== | | ===Hardware Requirements=== |
| Line 20: |
Line 16: |
| | To use the '''io demo''' program you will need the following hardware. | | To use the '''io demo''' program you will need the following hardware. |
| | | | |
| − | * An EMAC [http://www.emacinc.com/som/som150es.htm SOM-150ES] carrier board with a compatible SoM <br /> | + | * An EMAC 150 series carrier board with a compatible SoM <br /> |
| | OR <br /> | | OR <br /> |
| − | *An EMC 200 carrier board with a compatible SoM <br /> | + | * An EMAC 200 series carrier board with a compatible SoM <br /> |
| | OR | | OR |
| | * an IPAC <br /> | | * an IPAC <br /> |
| − | ====Carrier Board====
| |
| | | | |
| − | [[File:know_your_som_150.jpg|frame|left|SOM-150ES carrier board with GPIO, LEDs and analog IO indicated.]]
| + | == Usage and Behavior == |
| − | <br clear=all>
| |
| − | | |
| − | This is a detail of the '''HDR1 PLD & BUFFERED GPIO''' header. Pin 49 is Vcc. The bottom pins: 2, 4, 6...46, 48, 50; are all ground. Port A is pins 1, 3, 5, 7, 9, 11, 13, 15. Port B is pins 17, 19, 21, 23, 25, 27, 29, 31. Port C is pins 33, 35, 37, 39, 41, 43, 45, 47.
| |
| − | | |
| − | [[File:gpio_header_detail.png]]
| |
| − | | |
| − | The output shows the stray charge on the inputs being read by the analog-to-digital converter on pins 11, 12, 13, 14. Press '''a''' a few times to watch the values change.
| |
| − | | |
| − | This is the HDR8 ANALOG IO header.
| |
| − | | |
| − | [[File:analog_io_header_detail.jpg]]
| |
| − | | |
| − | Let's do a couple of experiments on our analog in pins.
| |
| − | | |
| − | Connect pin 20 to pin 11 and hit '''a'''. Note that the first value is higher than the others. It should read approximately '''3FF'''. This means that the first analog-in pin has 2.5V on it.
| |
| − | | |
| − | Connect pin 1 to pin 11. Hit '''a'''. Note that the first value is lower than the others. It's the vicinity of 0. That means that the first analog-in pin is pulled down to ground.
| |
TODO: {{#todo:SEOKWREV (01.03.14-16:47->JG+);(01.03.14-17:35->MD+);(04.07.14-09:45->BS+);(04.09.14-16:15->BS+)|Jgreene|oe 4,oe 5,jg,md,SEOKWREV,ky,bs}}
This demo covers basic gpio usage for the IPAC single board computer, and 150 and 200 series carrier boards. This demo first cover gpio manipulation through the Linux terminal and then demonstrates gpio usage in a C program using an io example program.
Setup
Hardware Requirements
To use the io demo program you will need the following hardware.
- An EMAC 150 series carrier board with a compatible SoM
OR
- An EMAC 200 series carrier board with a compatible SoM
OR
Usage and Behavior
