Raspberry pi as second display for mac install#
Install minicom ( brew install minicom) so you can emulate a terminal connected over serial.
Raspberry pi as second display for mac serial#
There are a number of ways to interact with the serial console on a Mac (and most are the same as on Linux, with sometimes minor usage differences), but the two I've used in the past are minicom and screen. That's the device you'll connect to on your Mac. Note the tty.usbserial- and cu.usbserial- numbers in there.Open a terminal window on your Mac, and run ls /dev | grep usb Plug the USB to serial adapter into the pins as pictured below on the Pi (Black to GND, White to GPIO 14/pin 8 (UART TX), and Green to GPIO 15/pin 10 (UART RX)): Save that change, eject the microSD card, and stick the card back into the Pi.Pop the Pi's microSD card into another computer, edit the config.txt file inside the boot volume, and add the following line at the bottom: enable_uart=1.I bought the Adafruit 954 USB-to-TTL Serial Cable. If you want to access the Pi's serial console, here's what you need to do: Simply Embedded has a great overview of UART if you want to learn more. Many devices-including things like storage controller cards, which in a sense run their own internal operating system on an SoC-have a 'UART header', which is typically three or four pins that can connect over the RS-232 standard (though many do not operate at 12v like a traditional serial port! Use a USB-to-TTL adapter like the one I mention below). The Raspberry Pi can output information over a 'serial console', technically known as a UART (Universal Asynchronous Receiver/Transmitter). Or maybe you're like me, and someone 'accidentally' cut your Raspberry Pi in half, and you want to see what it's doing since it won't boot anymore. Or you don't have an HDMI display, and you can't log into your Pi via SSH. Or it'll boot, but it'll do weird things.
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