It didn't take long for Raspberry Pi 4 owners to realize something wasn't right with the new micro-computer's Type-C port.
E-marking is a technique which gives a cable a digital signature based on what the cable is going to do.
If you're facing an issue with the type-C port of your Raspberry Pi 4, you can use a basic or non-e-marked cable to power it.
The bad news is that there's not a lot the team can do about this until the next hardware revision - the quirk is built into the hardware. Pi co-creator Eben Upton told Tech Republic that he expects "this will be fixed in a future board revision", and a Pi spokesperson confirmed to Ars Technica that a board revision with a compliant USB-C charging port should roll out in the "next few months". "It's surprising this didn't show up in our (quite extensive) field testing program". This makes the implementation a non-compliant design and tampers with compatibility.Читайте также: Boeing’s 6-Month Deliveries Plunge by More Than a Third
"Instead of trying to come up with some clever circuit, hardware designers should simply copy the figure from the USB-C Spec exactly". Starting at $35, the Raspberry Pi 4 has a more powerful Broadcom BCM2711 chip with four ARM Cortex A72 CPU cores at 1.5GHz.That chip can decode 4K videos at 60fps using HEVC/H.265, render OpenGL ES 3.0 graphics, and output 4K video to a monitor via micro HDMI.
As detailed by Tyler Ward, the Raspberry Pi 4 has a non-compliant USB-C charging port and doesn't work with as many chargers as it should.
The Pi 4 is not the first high-profile device to get the USB-C spec wrong. The system doesn't power up. The second mistake is that they didn't actually test their Pi 4 design with advanced cables. When connected to an electronically marked USB-C cable, the SBC detects the cable as an audio accessory and doesn't power the device. Incidentally, many users have strongly claimed that all USB Type C cables that have the ability to deliver power as well as transmit data should have worked with the new Raspberry Pi 4 Model B if the Raspberry Pi Foundation had simply followed the USB-C specification correctly and thoroughly. Every single Apple MacBook since 2016 has shipped with a cable with an e-marker chip. As a result, the cable doesn't supply power, and your Raspberry Pi won't start up.При любом использовании материалов сайта и дочерних проектов, гиперссылка на обязательна.
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