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.
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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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Wrong documentation for Mega2560 SPI Pins?
This page https://store.arduino.cc/usa/mega-2560-r3 contains an image under the Documentation section which shows digital pins 10 to 13 with labels SS, MOSI, MISO, and SCK.
EDIT: The documentation ...
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SPI between Master arduino and Slave arduino
How can I send the string from Slave SPI to Master SPI?
I want to write code in Bare Metal.
The problem which I am facing is I can't make out what will be my blocking function in Master SPI code when ...
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Arduino SPI Mutual Communication [closed]
Below are my codes for transferring string data between two Arduinos from Master to Slave via SPI. Similarly, how can I transfer string data from Slave to Master?
Any suggestions?
Master Code:
#...
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I2C and SPI at the same time?
I would like to ask a question relating to the following communication setup:
STM32 -- Arduino Pro Mini -- ADNS3080 sensor
The interface between STM32 -- Arduino is I2C and the interface between ...
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Using Arduino to Record analog signals with SPI ADC + Sampling Rate Issue
I am using Arduino UNO to Read 8-channel, 24-bits resolution Analog signals using ADS1299 Analog-fornt-end. ADS1299 use SPI interface to talk with Arduino. Currently, I can record the analog signal ...
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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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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 ...
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SPI with DMA in a Arduino Due
I have a project where I need to store data (~16Mo) on a memory and be able to fetch the data fast (<36000bits/s) with DMA because I have other signals to take care of.
Currently I use a SD card ...
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FreeRTOS is not solving my problem to run tasks parallelly
I'm pretty new to esp32 and I'm trying to combine two codes in one, they are simple codes from projects that I found online, the first one uses PIR sensor to send message to telegram each time motion ...
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ESP32 TTGO T-Call connect to SX1276
I have an ESP32 TTGO T-Call and I want to add a LoRa SX1276. I am new to that and I am trying to write a simple program that, when it receives a packet from a LoRa sender, sends via gsm an HTTP ...
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How to connect two LED strips (APA102/SK9822) to Arduino UNO?
So what I am trying to do is to connect two SK9822 LED strips to Arduino UNO.
I am a bit confused about how to properly set this up so I can individualy control any led. So obviously 5V should go to ...
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Can Arduino UNO/MEGA master assert SPI SS LOW on multiple slaves at once if Full Duplex is unnecessary?
I have a computer talking serially to an UNO SPI Master and, beyond it, multiple MEGA Slaves. The slaves never talk back to the master.
I understand it is normal and correct to assert SS LOW to ...
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How to connect NRF24L01 to Wemos D1 R2
I have troubles to connect a NRF24L01 to a Wemos D1 R2 board. I succeeded on an Arduino Uno. Does anyone knows the pinout?
I used (same as with Uno):
D13 - SCK
D12 - MI
D11 - MO
D8 and D9 for CE and ...
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SCLK pulses not seen when using SPI on ESP32
I am using the following code in my esp32 using Arduino IDE for spi communication which is an example code -
#include <SPI.h>
static const int spiClk = 1000000; // 1 MHz
//...
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Arduino (Mega 2560) Ethernet Shield 2 (W5500) - Can't connect
I'm having issues connecting to my arduino mega via ethernet. Its a very basic start to the code just to get the network side up and running, them im going to add in what I actually want it to do. For ...
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Using SPI on Pi Pico, Arduino IDE
Beginner with the Pi Pico here, but I studied electronics engineering and am reasonably hardware literate. I've used mbed online for a project prior to covid.
I want to use SPI to connect to a display ...
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Arduino Bluepill STM32 spi doesn't work
Has anyone successfully use SPI1 of those pins?
SCLK -> PB3
SDIO -> PB5
SDO -> PB4
MISO CS -> PA15
I've tried to use another side of SPI1 pins on the other sides of the board (PA4, 5, ...
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SD Card Mount Failed with Waveshare ESP32 using Arduino IDE
I'm currently working on a project using an ESP32 (the Waveshare ESP32 Driver Board), and I am trying to read data from an SD card, but consistently getting a "SD Card Mount Failed" error. I ...
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Is it possible to synchronize two SPI busses to send data out in parallel on the same clock signal?
We're working with these very odd driver chips which are sort of like shift registers except rather than latch the data at the end, the latch needs to happen over the last 'n' clock cycles in parallel ...
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Slow I2C communication
To collect temperature and BPM, I connected a max30101 in my Heltec WiFi kit V3 with ESP32. The data collected are stored in arrays to extract statistical features from signals which an algorithm will ...
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Ability to connect 2 or more w5500 Modules and deal with them as objects
I wish to create a rudimentary ethernet in/out - switch/hub where I can (sort of) daisy chain my boards. (I don't wish to use a ethernet switch/router/hub)
One port would be acting as server
The ...
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COM disconnects and program fails when including code trying to initialize SD card (RP2040 Pi Pico W running Arduino)
I'm having an issue where anytime I run a program such as the SD card read write example (Below) the COM port disconnects. The only changes I have made to the example code is I am using SPI1 instead ...
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TFT display shows black stripes
I'm new to the field: I'm trying to drive a TFT ST7735S display (this is the model I'm currently using: https://www.amazon.it/dp/B078JBBPXK/ref=pe_24968671_487022601_TE_SCE_dp_1) with an Arduino Mega ...
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Programming barebones ATMega328 with external programmer and no bootloader
I have created a circuit with a barebones ATMega328.
I also have an external programmer (Sparkfun's Pocket AVR Programmer)...
Now I want to program a particular sketch... When uploading a sketch, do i ...
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Fast wired communication protocols
I have an esp32 connected to an FPGA about 2 cm on a PCB. I am trying to send a constant data stream to the FPGA at a throughput of around 1.5 MB/s.
This is too fast for UART, I've been considering ...
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Changing SPI ports on an Arduino
My end goal is to read information from an nRF24l01 module connected to my Arduino UNO R3, and generate an interrupt whenever a message is sent to the Arduino.
Now, I have read that for Hardware ...
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Remap SPI functions to default pins Arduino Zero via software?
I am looking at the documentation for the Arduino Zero, and I am a little confused.
It indicates that pins 13, 12, and 11 can be used for CIPO, COPI and SCK, but using SPI.begin() puts the signals on ...
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How to set OTA on ESP 32
I am currently using an evalkit Nina W106-00B board that incorporates an ESP32.
I am desperately trying to implement OTA (Over-The-Air) updates.
I started by modifying my partitions.csv file, which ...
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25Q128 flash and garbage data over SPI
I have a logic analyzer coming in the mail, but thought I might ask for help here first.
I soldered the 25Q128 flash onto an adapter and wired it up to an Arduino UNO clone as you can see in the ...
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How to create 2 individual daisy chains using the MAX7219 Module and Mega2560
I am using MAX7219 8 digit 7 segment displays with Arduino Mega2560. Now, I have to physically space out the displays far from each other. Hence, after a certain distance the displays on the far end ...
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How do you use SPI on an Arduino?
With reference to the Arduino Uno, Mega2560, Leonardo and similar boards:
How does SPI work?
How fast is SPI?
How do I connect between a master and a slave?
How do I make an SPI slave?
Please note: ...
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Correct usage of SPI with ISR
My Arduino needs to do:
Run ISR as many times as possible/ as fast as possible.
Occasionally receive data over I2C.
Output data over SPI in ISR.
My question is regarding SPI and ISR.
The ...
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Send data through SPI with DMA
I need to send data as fast as possible from an Arduino DUE to an extern DAC. To do so I use DMA & SPI and I want DMA to fetch data from the memory and send it to the SPI which will just relay it ...
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Raspberry pi pico (Arduino core) not initialising SPI correctly for NRF24l01
I'm working on a project where i have a Raspberry pi Pico connected to a NRF24l01+ to send some data.
However i'm not recieving any data on the reciever and i think that its because the SPI bus is not ...
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AD7768-1 library " Arduino "
I am working on a project and I need an AD7768-1 library to make this analog-digital-converter talk to my Arduino using SPI.
" The AD7768-1" doesn't exist in Arduino's library.
Thanks in ...
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How to save the current SPI settings with out have a global variable keeping track?
I am making a function for one of my devices, my device needs a particular SPI setting. I was hoping to save the current setting of the SPI class into some variable, load in the required setting, do a ...
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SD card breakout sometimes does not initialise (SPI connection - Teensy 3.2)
I have connected this Adafruit SD Breakout to a Teensy 3.2 over SPI. Because Teensy 3.2 is 3.3 V, I've connected the 3.3 V pin of the Teensy to the 3V pin of the SD breakout.
See sketch below. I'm ...
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Error with Mega2560 via SPI
I tried the following code to communicate via SPI with MPU9250 and Mega2560 But I got the following error:
Error initializing communication with IMU
Why I got this error?
/*
* Brian R Taylor
* brian....
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UART SERCOM on Pins 11-13 Arduino M0 (SAMD21)
I am a newb at coding. Does anyone have any code laying around or some time to write some to send data over UART SERCOM on pins 11/12/13 on a SAMD21 board like the Arduino M0? I am trying to send a ...
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SPI: problems communicating with sensor using Arduino
I have a sensor which I am trying to communicate with over SPI using an Arduino UNO. It is my first time using SPI and I'm experiencing some problems which I'm hoping are just due to some ...
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Are there any detail examples of Si4463
Recently, I bought two Si4463 chips, but I don't know how to use them. It seems complex. I'd like to know if there are any examples of an Si4463 used with an Arduino?
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Arduino Due as Triggered DMA SPI Slave is possible?
Is it possible for arduino Due to act as DMA-SPI-slave device which can exchange SPI data (uint16_t TX[10] and RX[10]) in triggered slave mode?
I have a setup in which time period is very short (~...
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ESP32DevkitC-V4 interfacing ADS8698 (18 bit ADC)
I am currently working on an SPI interface to measure the voltage of an amplified sensor bridge signal. I am using an ESP32 module to control the device. Since I am logging the data to an SD card, I ...
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ST7735s 1.8" SPI 128x160 TFT Module - White Screen
I am having an issue in my 1.8" TFT LCD module with SPI interface in Arduino Nano. I keep seeing the white screen on my tft.
I have made the following connections using Jumper cables:
RST --- ...
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Is it possible to program an AVR chip (atmega328p) via i2c?
Currently I am using avrdude and I'm programming my atmega328p chip via the spi pins by pulling the RESET pin low (spidev programmer).
In my project I'm using predominantly i2c and this the only place ...
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SPI - CS Intermittently Goes High on Arduino UNO
This question is similar to SPI - Apparently Random pulses on CS/SS line in that I have a single SPI peripheral (a Microchip 23LC512 Serial SRAM) that an Arduino UNO is communicating to.
Everything is ...
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I need help with creating a menu using u8g2 library
I want to make a project with a (Nokia 5110) display using u8g2 library.
Here I have the code for my program:
#include <Arduino.h>
#include <U8g2lib.h>
#include <TM1637Display.h>
#...
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ESP32 Multiple Master SPI Setup -> VSPI - NRF24 and HSPI - ST7735 Simultaneously
I have been trying to use dual SPI masters, I know it is possible and followed the explanation best I could, and the code below is what I got. The issue is that the code is running the radio but not ...
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Communicate with Sparkfun CAN Bus Shied [closed]
i have a Arduino Mega 2560 R3 and a Sparkfun CAN Bus Shied. Im using the SparkFun_CAN-Bus_Arduino_Library-master. I want to communicate over SPI (they have diffrent SPI pins), so i had to change it in ...
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