I have a BeagleBone Black and Reed switch. Linux 14.04 is running on BeagleBone Black.
I want to interface this reed-switch with BeagleBone Black means How I can interface Reed-switch with Beaglebone black so that I can read it's status Using C program. I'm a new bee to hardware and don't know how to interface it. Any one have idea/suggestion ?
Basically, Using this I want to detect door is closed or open. :)
Configure a GPIO pin as input.
You will need a hardware interface circuit between the GPIO pin and the reed switch
Poll the GPIO pin for High or Low
Perform the intended action based on reed switch output.
HTH
Related
I am trying to Blink external LED using STM32CubeIDE and Proteus
while (1)
{
HAL_GPIO_TogglePin(LED_GPIO_Port, LED_Pin);
HAL_Delay(100);
}
[)2
The LED doesn't blink
I am assuming that you have configured the pin to be output correctly with no pull up or pull down resistor. Hence you will need to terminate the LED into the ground instead of 3.3V.
In the event there is no pull up or pull down resistor, the pin is neither high or low, the pin is in a "z-state" hence when you toggle the LED from low to high there is no potential difference between the pin and the LED so no current flows, and when the pin goes from High to low, the diode property (only allows current flow in one direction) of the LED doesn't let current flow into towards the board.
The Problem Solved.
First the polarity of the LED.
Second the library of the blue pill on proteus doesn't support STM32FC103C8 that I selected on STM32CubeIDE. STM32FC103C6 should be selected instead.
I am developing an app for tvOS and I want when the user shakes the remote, or moves it in a downward slash, that an event gets triggerred. But apple's documentation mostly focuses on registering button presses and the focus engine.
Can anyone help me with how I can access the accelometer?
Thank you for your help
To use the motion sensing aspects of the Siri Remote, you need to treat it as a game controller. See Working with Game Controllers in App Programming Guide for tvOS and the GCMotion class.
While it's fairly easy to port an ios game to tvos, note the following limitation that did slow me down as originaly I was using the rotation feature and expected to be the same on the remote, I had overlooked it in the doc but it says "Although the remote supports motion data (and the GCMotion profile), the remote cannot determine the attitude or rotation of the remote. The corresponding properties always return constant values."
And the constant values as per the tvOS header GCMotion.h are:
#note Remotes can not determine a stable rotation rate so the values will be (0,0,0) at all times.
#note Remotes can not determine a stable attitude so the values will be (0,0,0,1) at all times.
i am trying to interface a cheap LCD panel to BBB
so basically i am making my own LCD7 cape but without the EPROM & I2C stuff
and till now i have succesfully wrote a device tree overlay , loaded it, and fried a LCD panel well ...without any smoke.
the problem is after checking the LCD7 made by circuitco i noted this IC between the beagle and the LCD :
74AVC32T245
i dont really understand why its there
here is the opensource design of LCD7 cape the transducer is at page 21
http://www.openhacks.com/uploadsproductos/beaglebone-lcd7-reva2-srm.pdf
any help regarding out to interface LCD panels is very appresiated
on page 20 of that document, section 5.2.2: Non-Inverting Bus Transceiver explains everything. The chip is meant for voltage level translation, just in case the LCD and the MCU operate at different levels. But in the BeagleBone LCD7 Cape, no translation is required. So its just a buffer, I don't think it should matter in the code implementation. It does say "its two power rails are both 3.3V" So you should observe that.
Does anyone know of a way to change the brightness of an external display connected to a mac through Objective-C? (Like an Apple Thunderbolt Display or LED Cinema Display?) I have seen answers for adjusting the primary screen's brightness, but not a secondary screen.
Thanks.
I am working on a live augmented reality application. So far I have worked on many AR-Applications for mobile devices.
Now I have to get the video signal from a Panasonic P2. The camera is an European version. I catch the signal with a AJA io HD Box, witch is connected by firewire to a MacPro. So far everything works great - just not in Unity.
When I start the preview in Unity the framebuffer of the AJA ControlPanel jumps to a frame-rate of 59.94 fps. I guess because of a preference on unity. Because of the European version of the camera I can not switch to 59,94fps or 29,47fps.
I checked all settings in Unity, but couldn't find anything...
Is there any possibility to change the frame-rate unity captures from an external camera?
If you're polling the camera from Unity's Update() function then you will be under the influence of Vsync, which limits frame processing to 60 FPS.
You can switch off Vsync by going to Edit > Project Settings > Quality and then setting the option Vsync Count to "don't sync".