![]() ![]() To restart your board, plug the power cable back into the board. Then, unplug the power cable from the board. ![]() Best Practices and RestrictionsĪfter executing the command, wait until the operating system shuts down all LEDs on the board except for PWR LED. The maximum permitted current draw from the 3.3 volt pins is 50 mA. You can power external components using 3.3 volt and 5 volt power pins on the expansion headers. There are 1.8 kOhm pull-up resistors on the board for these pins. The pins marked as SDA0 and SCL0 are preset to be used as an I2C interface. For example, if you do not need to use SPI interface, you can use SPI pins as general purpose digital I/O. You can use some of the pins available on the Raspberry Pi hardware for multiple purposes. A CSI (camera serial interface) is available so that you can connect an available Camera Board. There is no over-voltage protection on the CPU chip. The GPIO pins use 3.3 volt logic levels and are not 5 volt tolerant. Raspberry Pi Model B+ board has more I/O pins exposed than Raspberry Pi Model B board. The raspi object determines the version number of your Raspberry Pi hardware and displays the correct pin diagram for your version of the board. The showPins() method displays a MATLAB figure showing a diagram of pins available. Note: If you encounter errors after running the above command, try using additional arguments (as listed in raspi) or refer to Troubleshoot Connecting Issues to Raspberry Pi Hardware. This example is intended to familiarize you with low level interfaces of the Raspberry Pi hardware, establish sound practices for wiring and connections when working with external electrical components and use MATLAB command-line interface for Raspberry Pi hardware to control simple devices like LEDs, push buttons, and relays. If you mis-wire a GPIO pin, for example, you risk losing a GPIO pin, and, in some cases, your Raspberry Pi hardware. To use these low-level interfaces, you must have a sound understanding of basic electrical concepts. ![]() Most of the low-level interfaces of Raspberry Pi hardware are not plug-and-play. You can, for example, turn a LED connected to one of the GPIO pins on or off or sense the position of a push button from the MATLAB command prompt. The Raspberry Pi support package includes MATLAB® command-line interfaces to communicate with external devices connected to Raspberry Pi hardware. You can take advantage of these low-level interfaces to develop meaningful real-world applications. Raspberry Pi hardware has low-level interfaces intended to connect directly with external devices such as A/D converters, sensors, motor drivers, etc. Raspberry Pi is a single board, credit-card size computer that can run Linux®. ![]()
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