Weblinux/drivers/spi/spi-loopback-test.c Go to file Cannot retrieve contributors at this time 1117 lines (1003 sloc) 26.8 KB Raw Blame // SPDX-License-Identifier: GPL-2.0-or-later /* * linux/drivers/spi/spi-loopback-test.c * * (c) … Webspi-max-frequency = <1000000>; reg = <0>;};}; For now I just to want to test a single SPI slave to verify if everything is working correctly. Later I'll need 4 SPI slaves connected to the same master and I know that I'll need a slave decoder but one step at a time. PetaLinux creates a /dev/spidev32765.0 interface. I've connected to my board a ...
adc - SPI slave randomly missing bits in response - Electrical ...
WebToggle navigation Patchwork Linux SPI core/device drivers discussion Patches Bundles About this project Login; Register; Mail settings; 11665665 diff mbox series [01/14] spi: spi-loopback-test: Fix formatting issues in function header blocks. Message ID: [email protected] (mailing list archive) State: Superseded: … WebMay 1, 2024 · The loopback test is only a preliminary test, to make sure that the SPI thing is more or less setup OK. However two important checkouts are missing: (a) CS0 and CS1 are not tested. You need a scope to see the CSn waveforms are more or less noise free, and not too distorted. I vaguely remember that you set SPI to 5MHz. smith electronics and appliances
How to use SPI from Linux userland with spidev - stm32mpu
WebOct 8, 2024 · The SPI pins on external connector J16 will be used used to run SPI loopback test. 2 Kernel configuration Verify that the i.MX LPSPI driver (CONFIG_SPI_FSL_LPSPI) is enabled in your kernel configuration: In menuconfig: Device Drivers -> SPI support -> <*> Freescale i.MX LPSPI controller WebAug 6, 2024 · The OP is using SPI speed 1.35MHz to do the testing. Now I am testing MCP3201 the accuracy of converting a voltage of 1.68V with the voltage reference also 1.68V (Vcc/2) without using any by pass capacitors at MCP3201 Vcc and voltage reference. I tested over a range of 10kHz to 10 MHz. I found that the readings at 1 MHz or over is … smith electric \u0026 signs