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2 wrz 2022 · Usually, complex SPI-connected devices do have an "identification" or "who-am-I" register, which returns a fixed value, thus allowing some basic functionality testing. Use an oscilloscope/LA to observe waveforms on the signals, and compare them to those given in the connected device's datasheet.
Komunikacja przez SPI. Mikrokontroler STM32F103RB posiada dwa interfejsy SPI, każdy o prędkości transmisji do 18 Mbit/s. Do przykładów wykorzystamy pierwszy interfejs, czyli SPI1. Na początek musimy odszukać w dokumentacji, na których pinach dostępne są wyprowadzenia interfejsu: SPI1_SCK - PA5; SPI1_MISO - PA6; SPI1_MOSI - PA7
Funkcja HAL_SPI_Transmit wysyła bufor danych przez interfejs SPI. Jej parametry to kolejno: wskaźnik do struktury opisującej interfejs (czyli zmiennej hspi2 utworzonej przez CubeMX), wskaźnik na dane do wysłania, liczba bajtów i czas, jaki maksymalnie możemy czekać na ich wysyłanie (tzw. timeout).
12 kwi 2024 · This article explains what SPI is and uses examples to demonstrate how to use it. Contents ↑. 1 What is Serial Peripheral Interface (SPI)? 1.1 STM32 SPI modes. 1.2 STM32 SPI parameters. 1.3 Main SPI HAL functions. 2 Configure the SPI to communicate between two boards. 2.1 Objective. 2.2 Master board project.
25 mar 2015 · The easiest way to see if your SPI code is working is to connect your controller to external shift registers and find out. You could use one or more serial-in parallel-out shift registers driving LEDs to test the SPI output: 74hc595 driving LEDs with 1k series resistors on each LED work well.
11 kwi 2020 · When SPI1 is initialized its SCLK pin immediately goes high, clock is high at idle, but when SPI2 is initialized its SCLK pin never goes high. I have tried initializing PB13 as an individual port and it works fine, goes high when set high and low when set low. So, it appears the hardware is OK.
26 wrz 2015 · SPI protocols usually expect the master to request data on one transmission, and get a response on a subsequent one. Using the SPI library on the Arduino, doing a single transfer looks like this in code: byte outgoing = 0xAB; byte incoming = SPI.transfer (outgoing);
