Questions tagged [spi]
Serial Peripheral Interface. Allows full-duplex serial communication from a master device to one or more slave devices arranged on a bus. Sometimes referred to as a 4-wire bus.
508 questions
0 votes
1 answer
537 views
Set SPI Mode on Arduino Uno R4
I am switching a code from Arduino Uno R3 to Arduino Uno R4 Wifi due to the limitation of RAM spaces on R3. I use a thermocouple shield and SD Card read/write shield with the project, which requires ...
- 3
1 vote
0 answers
76 views
SB Components Micro RP2040 and ST7789 2.4 TFT LCD SPI display not working together using any library
I have a Micro RP2040 board from SB Components. Link to this product With this I also have a 2.4 inch SPI TFT LCD screen with an ST7789 controller Link to the screen, it's on that page just scroll ...
- 111
0 votes
1 answer
391 views
P10 LED Display Character Overlaying with DMD library
Hi, I am using p10 Led display and trying to make digital clock. it works fine but after 2 or more weeks later without any switch off there is a overlaying start on characters. why this happening I ...
- 297
-1 votes
1 answer
215 views
How do I fix display showing random pixels on ST7789V2 LCD Module?
Problem Description: I’m trying to interface a Waveshare 1.69-inch LCD module (ST7789V2 driver, 240x280 resolution) with an Arduino UNO board. I’ve connected all the necessary ports as per the ...
- 1
0 votes
1 answer
327 views
Change MKR Zero SD SPI Pins
I have been trying to learn more about using the ATSAMD21 MCU with Arduino. I designed and assembled a bare bones breakout board and have successfully flashed the MKR Zero bootloader and uploaded ...
- 101
2 votes
1 answer
162 views
L9780 and SPI communication
I'm working on a program to interface with a development board I spun for an L9780 - wideband oxygen controller IC. At this point, I'm trying to get a consistent "status" read back but ...
- 41
3 votes
1 answer
140 views
Connecting 3x 0.91Oleds (Using a TCA9548A 8-channel multiplex) and 1 1.51 Inch Transperant SPI OLED
As the title suggests, I have an Arduino Nano connected to a multiplex (which is connected to 3x 0.91 OLEDs) and an 1.51 inch OLED connected through an SPI. The problem is that they just refuse to ...
- 31
0 votes
0 answers
914 views
ESP-C3 Super mini MAX98357A and SD Card Reader together
After a lot of research and minimum results about pin mapping and particular specific configurations for SPI and I2S on ESP-C3, i about to give up on this. I have recently bought ESP32-C3 Supermini ...
0 votes
0 answers
140 views
How can I display an image on a Waveshare ILI9486?
I am using STM32 and 3.5 inch TFT display (Waveshare ILI9486) and I want to display an image and I have connected the SD card. How to do using the Arduino IDE? For now I am trying to fetch a word from ...
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0 votes
0 answers
141 views
Data constant and always zero from the ADXL345 accelerometer with ESP32 using SPI
I am trying to get data from an ADXL345 accelerometer using an ESP32 via SPI communication. I have configured my code following the ADXL345_WE library specifications and have verified the hardware ...
1 vote
0 answers
141 views
Deciphering AD7730 outputs
I am currently working with a AD7730 chip for analog-digital conversion. The chip is programmable, and I have been pulling code from GitHub as well as other links. I am unfamiliar with SPI (the ...
- 119
1 vote
0 answers
201 views
Issue with multiple RC522s connected to Arduino Uno
THIS IS NOT A DUPLICATE QUESTION. My main problem is that whenever I attach the third RC522, the whole system becomes unstable. When I attach the fourth, suddenly one or two of the modules stop ...
- 119
2 votes
2 answers
2k views
ESP32 SPI Mutual Communication
I have two ESP32 cards. I want to set one of these cards as Master and the other as Slave and communicate via SPI. I have done this before on Arduino Uno, but I cannot do this on ESP32. Below are my ...
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2 votes
2 answers
404 views
Can I use SPI-related pins as a Digital Output?
I am trying to use an esp32 (NodeMCU-32s) as a ringlight controller for my camera. All it should do is sense when an input pin goes low (the camera's output connects to ground when the shutter goes ...
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1 vote
0 answers
37 views
Sparkfun canbus shield with LSM6DS33 dual SPI problem
Hello fellow arduino users! I have a question regarding using the Sparkfun Canbus shield in conjunction with the LSM6DS33 sensor on a dual SPI configuration. I have managed to get theese two to ...