![]() ![]() Only one problem: modern laptops (and even PCs) no longer have serial ports now that’s not an earth-shaking point, we know this. want to work on kernel code within a console device (so that, for example, all printk’s appear immediately like printf’s)Įssentially, to get a console, we require the old-style serial port and a simple RS-232 compatible ‘crossover’ cable – TxRx :: target board laptop serial port.kernel debug work (using KGDB or KDB, etc).require access to the bootloader monitor or command line.So, while the ssh login is fine for most purposes, there are circumstances where there is no alternative but to have a Linux console device available right from boot up. (My other pet grudge against the R Pi is the completely closed bootloader why can’t we just install and use U-Boot!? can we? EDIT: yes we can indeed! The Yocto Project makes it easy to do…).Īnother key point: for a long while I was using an inappropriate power supply and, for the lack of one, was destroying my (micro)SD cards! Using a proper “known to work” power supply for the R Pi is critical I now use a “Elementz Engineers Guild 5V 3A USB to MicroUSB Charger for Raspberry Pi 3 Model B/RPi 2 Model B/B+/A+ (White)” power supply ( purchased from Amazon India) and it works just great. The Raspberry Pi 3 Model B: notice the power cable (bottom-rt) and ethernet RJ45 cable (top rt) ![]() However, one of the thing that bugs me about it – by default, one can either hook it up to to a digital monitor or TV via HDMI (not ideal for developers, not for me at least!), or, much better, attach it to your local router via ethernet RJ45 cable and log in to it over ssh(1) from your laptop. The Raspberry Pi (I’m currently using the R Pi 3 Model B+) is a fantastic embedded Linux prototyping and development platform for hobbyists and tinkerers. ![]()
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