I want to define a SPI device with usermode access, as explained for example in http://linux-sunxi.org/SPIdev Following these examples, I added in the devicetree this : &ecspi1 { .... other ...

I tried to use the hardware NSS signal with the HAL library, but I can't find any function to make the NSS pin have a low or high level. I also tried to find the answer in the HAL documentation, bu...

With lucene-core-5.5.2 i am facing problem a in weblogic server. standalone search application works but when i deploy as WEB APP it is failing with below error Exception type is 'java.lang.Except...

I am experimenting with SPI on JDK 9. Entire example works on JDK 9 without "module-info.java". After adding "module-info.java" ServiceLocator is not finding implementing class....

I am using a STM32L476RG board and HAL SPI functions: HAL_SPI_Transmit(&hspi2, &ReadAddr, 1, HAL_MAX_DELAY); HAL_SPI_Receive(&hspi2, pBuffer, 4, HAL_MAX_DELAY); I need to receive dat...

I am examining a way to connect two microcontrollers. On the level of serialization I am thinking of using Nano protobuffers (http://code.google.com/p/nanopb/). This way I can encode/decode message...

A typical x86 systems has firmware (aka BIOS or UEFI) stored in a SPI based Flash chip. When the power-on happens, the processor starts executing at Reset Vector which is pointing to memory-mapped ...

What is the difference between SPI and serial? In reading an article talking about inter-processor communications, it states that serial interfaces are being replaced with SPI for better/faster com...

I'm using a STM32F4 and its SPI to talk to a 74HC595 like in this tutorial. Difference is for starters I'm using the non-DMA version for simplicity. I used STMCubeMX to configure SPI and GPIO Issu...

An ESP32 app using ESP-IDF (ESP32 SDK) communicates with two SPI slaves on the same SPI bus (ILI9341 TFT driver, NRF24L01+ RF transceiver). Overall, it works great. However, some of the data receiv...

I am working on bringing up SPI on Kontron's Atom-based SMARC-sXBTi board under Linux. Kontron provided Yocto BSP but it does not include SPI driver. I rebuilt Linux with SPI support. I can see t...

Can SPI hardware on the Arduino Nano be used? On the Nano page it says: SPI: 10 (SS), 11 (MOSI), 12 (MISO), 13 (SCK). These pins support SPI communication, which, although provided by the unde...

I'm maintaining some userspace code that talks to a FPGA via SPI. Right now it's polling to see if there's data to act on, which I'm not thrilled about. The (heavily-simplified) structure of the co...

I hope to find some help even if this issue might be more hardware than software related (we'll see). I'm working on a custom board based on Freescales P1021 processor (ppc, e500v2 core). A externa...

I have come to understand that bit banging is horrible practice when it comes to SPI/I2C over GPIO. Why so?

I use STM32F407VTG6 controller and try to receive data from SPI using DMA. Then I want to process data on DMA Complete Transfer Interrupt. But when Complete Transfer Interrupt is occurred I see tha...

I've had a look at Stack Overflow question Initialization of a microSD card using an SPI interface and didn't see any answers that matched my issue (that is, things I haven't already tried). I ha...

Explanation for MODULE_ALIAS in the code says /* work with hotplug and coldplug */ MODULE_ALIAS("platform:omap2_mcspi"); But, what exactly is MODULE_ALIAS? Is there a significance for : (colon)...

I am trying to understand this driver code of mcspi for omap2 panda board. I don't understand who calls the probe function and what is the call chain in this driver code? How does the driver is ...

I know the basic of I2C and SPI communication. As both are synchronous protocol. I wanted to know that what makes SPI faster than I2C. If I am not wrong using I2C we can go used 400kbps while...

I have a 32 GB Kingston SDHC microSD card which has to communicate to MSP430F2618 via SPI. I was not able to initialize it by using CMD55 + ACMD41 (with bit30 set to 1), as it is described in ...

I use kernel 3.12.rc4 on an embedded linux device (olimex imx233 micro). My aim is to use /dev/spidev to be able to communicate with another spi device. I edit arch/arm/boot/dts/imx23-olinuxino.d...

I'm working on an interrupt handler with a hardware design group and we're trying to figure out where a bug is. I'm reading a chip over the SPI bus at 5khz. The chip loads 4 bytes and triggers a da...

I'm trying to design an efficient communication protocol between a micro-controller on one side and an ARM processor on a multi-core TI chip on the other side through SPI. The requirements for the...

It's a FT2232D chip, and the LED is connected to BDBUS6. The library is less documented than I might like (better than FTDI's own library though, which doesn't even work on modern kernels), the o...