By Warren Gay

You possibly already understand that the Raspberry Pi is a wonderful instructing device. so that you can train Linux fundamentals or Python programming or easy electronics, it’s an excellent spot to begin. yet what while you're an electronics engineer or a Linux platforms administrator or a really skilled maker? you must comprehend all the info and internal operating of the Raspberry Pi — how you can (figuratively or perhaps even actually) make it wake up and dance with out wading via fundamentals and introductory fabric.

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0 Pi. Overclocking Raspbian Linux for the Raspberry Pi is conservatively configured for reliability by default. Those with the need for speed can reconfigure it for increased performance but at the risk of less-reliable operation. 11 provides a raspi-config menu of five CPU profiles. The profile None is the default: Profile ARM CPU Core SDRAM Overvolt None 700 MHz 250 MHz 400 MHz 0 Modest 800 MHz 250 MHz 400 MHz 0 Medium 900 MHz 250 MHz 450 MHz 2 High 950 MHz 250 MHz 450 MHz 6 Turbo 1 GHz 500 MHz 600 MHz 6 The raspi-config requires root privileges and is started as follows: $ sudo raspi-config The initial menu screen provides an overclock selection with the description Configure overclocking.

Now, however, there is little reason to. Every attempt was made to keep the project programs in this book simple. This usually meant also avoiding threads. Yet, a few projects would have been more complicated without them. In the example using ØMQ, threads would have been present behind the scenes, even if we didn’t see them in our application code. With that introduction, let’s take a crash course on the pthread API as it applies to Raspbian Linux. h> When linking programs compiled to use pthreads, add the linker option: -lpthread: Link with the pthread library.

Table 5-1. 0 as 10M: 10/100 Mbit link OK or ACT LED This green LED indicates SD card I/O activity. c in arm/mach-bcm2708). PWR LED This red LED simply indicates that the Raspberry Pi has power. 3 V regulator. 29 Chapter 5 ■ Header Strips, LEDs, and Reset Figure 5-1. Power LED The power LED indicator is not necessarily an indication that the power is good. It simply indicates that power is present. The LED can be lit and still not have sufficient voltage present for the CPU to operate correctly.

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Mastering the Raspberry Pi by Warren Gay

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