Unanswered Questions
221 questions with no upvoted or accepted answers
6
votes
1
answer
191
views
Adafruit_LEDBackpack library interfering with analog input reading
I'm trying to do something I think would be simple. I'd like to read the input of a electret microphone board and update the Adafruit 24-segment LED Bar Graph. I got each individual item working ...
CommunityBot
- 1
4
votes
1
answer
306
views
MacBook + BLE Microcontroller Incompatibility?
I've programmed an Adafruit Feather nRF52840 board to send MIDI signals to my computer via BLE. I can confirm that the board pairs successfully with an Android phone and a Windows PC, but my laptop (...
CommunityBot
- 1
4
votes
0
answers
718
views
ArduinoDue - Matlab: SerialUSB.write() sends ASCII?
I'm trying to get some binary data from an Arduino Due to Matlab.
Basically this is the setup:
Due:
byte usbMsg[33]= {0};
// filled with dummy as example
usbMsg[1] = '00000001';// in[3];
usbMsg[2] =...
- 2,522
3
votes
0
answers
204
views
Black screen when using higher SPI-speed for RA8857 LCD-controller
I'm using an Arduino Due that talks via SPI to an LCD (800x480) with the RA8875 controller chip.
The most recent datasheet I could find is: RA8875 datasheet.
Everything works as expected when using ...
- 155
3
votes
0
answers
713
views
Getting atsam3x8e (Arduino Due) to work
I decided to make a pcb based on the atsam3x8e (microcontroller used in Arduino Due). For the design I copied most of the layout that I found on this site and looked at the official Arduino Due ...
3
votes
1
answer
2k
views
Creating a sine wave with a DAC and feeding it back
I want to produce a digital sine wave, send it to DAC0, and then receive it back as input on A0 and plot the graph. I am using an Arduino Due. I wrote the following code:
#define maxSamplesNum 120
#...
CommunityBot
- 1
3
votes
0
answers
378
views
Connecting Arduino Due's DAC output to pc sound card with protection
I would like to connect the DAC outputs of my arduino board to my pc sound card input so that I can use my sounds card as an osciloscope.
I have two questions:
1- if I don't use an amplifier, how ...
- 241
3
votes
0
answers
129
views
Reading Reveive Hold Register from USART in SPI Mode on Arduino Due
Sending with this function here works fine:
uint16_t usart0spiTransfer16(uint16_t spiMessage16) {
uint16_t sdo = 0;
byte firstByte = spiMessage16;
byte secondByte = (spiMessage16 >> ...
- 2,522
3
votes
0
answers
1k
views
Using Johnny-five API with RFID Controller Shield
Is it possible to use the Adafruit PN532 NFC/RFID Controller Shield with the Johnny Five API? I've searched the depths of google and I'm unable to find anything so far. If it is possible, how can I go ...
- 131
3
votes
0
answers
323
views
Arduino Due upload firmware issue
I have Arduino Due on SAM3x8e. I'm on Ubuntu 14.04. Before today I uploaded firmware via terminal using those commands:
$ stty -F /dev/ttyACM0 speed 1200 cs8 -cstopb -parenb
$ /home/q/apps/devel/...
- 151
3
votes
0
answers
883
views
Arduino Due native programming port
Arduino does not recommend to program the Due board via Native port as it is not reliable:
If the MCU crashed for some reason it is likely that the soft erase procedure won't work as this procedure ...
- 111
3
votes
0
answers
1k
views
Interfacing WM8731 code to Arduino Due
WM8731 codec was successfully interfaced with Atmega328 like variants in Arduino. It was first done successfully by Open music labs who are the makers of the breakout board for WM8731. Taking this ...
- 2,522
3
votes
0
answers
794
views
Why won't Wifi Shield detect any networks? Even really close
I just purchased an Adafruit Wifi Shield CC3300 and strapped it onto my Arduino Uno board.
I'm running this basic sketch that I found to test the functionality of the Wifi Shield: http://arduino.cc/...
- 93
3
votes
1
answer
785
views
ov2640 with 18 pin and no arducam shield
I bought this ov2640 camera module with 18 pins and I don't have shield to insert it to. I am looking for a library or working code on this my camera sensor but all I kept getting was arducam examples ...
- 31
2
votes
0
answers
161
views
TFT Screen with Arduino UNO does not display as expected
I have a 3.5" TFT LCD communicating in parallel connected to Arduino UNO.
I expect it draws a white circle on a black background but all it does is to show a white screen.
How to fix this?
main.c
...
- 173