Lazarus and Pascal Tutorials. Object Pascal Tutorial; All tutorials on the wiki - Collection of tutorials with difficulty ranging from beginner to expert level.
Raspberry Pi - Wikipedia. For other uses, see RPI. The Raspberry Pi is a series of small single- board computers developed in the United Kingdom by the Raspberry Pi Foundation to promote the teaching of basic computer science in schools and in developing countries.
- General What is Lazarus? Lazarus is a cross-platform integrated development environment (IDE) that lets you create visual (GUI) and non-visual Object Pascal programs.
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Peripherals (including keyboards, mice and cases) are not included with the Raspberry Pi. Some accessories however have been included in several official and unofficial bundles. The first generation (Raspberry Pi 1 Model B) was released in February 2. It was followed by a simpler and inexpensive model Model A. Autocad 2010 ������� ������� ?� Windows 7 here. In 2. 01. 4, the foundation released a board with an improved design in Raspberry Pi 1 Model B+.
These boards are approximately credit- card sized and represent the standard mainline form- factor. Improved A+ and B+ models were released a year later. The Raspberry Pi 2 which added more RAM was released in February 2.
Raspberry Pi 3 Model B released in February 2. Wi. Fi, Bluetooth and USB boot capabilities. Raspberry Pi boards are priced between US$5–3.
As of 2. 8 February 2. Raspberry Pi Zero W was launched, which is identical to the Raspberry Pi Zero, but has the Wi- Fi and Bluetooth functionality of the Raspberry Pi 3 for US$1. CPU speed ranges from 7. MHz to 1. 2 GHz for the Pi 3 and on board memory range from 2.
MB to 1 GB RAM. Secure Digital (SD) cards are used to store the operating system and program memory in either the SDHC or Micro. SDHC sizes. Most boards have between one and four USB slots, HDMI and composite video output, and a 3. Lower level output is provided by a number of GPIO pins which support common protocols like I.
The B- models have an 8. P8. CEthernet port and the Pi 3 and Pi Zero W have on board Wi- Fi 8.
Bluetooth. The Foundation provides Raspbian, a Debian- based Linux distribution for download, as well as third- party Ubuntu, Windows 1. IOT Core, RISC OS, and specialised media center distributions. Model A, A+, and the Pi Zero lack the Ethernet and USB hub components. The Ethernet adapter is internally connected to an additional USB port. In Model A, A+, and the Pi Zero, the USB port is connected directly to the system on a chip (So. C). On the Pi 1 Model B+ and later models the USB/Ethernet chip contains a five- point USB hub, of which four ports are available, while the Pi 1 Model B only provides two. On the Pi Zero, the USB port is also connected directly to the So.
C, but it uses a micro USB (OTG) port. Processor. It has a level 1 (L1) cache of 1. KB and a level 2 (L2) cache of 1.
KB. The level 2 cache is used primarily by the GPU. The So. C is stacked underneath the RAM chip, so only its edge is visible.
The Raspberry Pi 2 uses a Broadcom BCM2. So. C with a 9. 00 MHz 3. ARM Cortex- A7 processor, with 2. KB shared L2 cache. Benchmarks showed the Raspberry Pi 3 to be approximately 8. Raspberry Pi 2 in parallelized tasks.
It is described as 4–6 times more powerful than its predecessor. The GPU is identical to the original. The GPU provides 1 Gpixel/s or 1. Gtexel/s of graphics processing or 2. GFLOPS of general purpose computing performance. The graphical capabilities of the Raspberry Pi are roughly equivalent to the performance of the Xbox of 2. The LINPACK single node compute benchmark results in a mean single precision performance of 0.
GFLOPS and a mean double precision performance of 0. GFLOPS for one Raspberry Pi Model- B board.
There are reports the Raspberry Pi 2 can be similarly overclocked, in extreme cases, even to 1. MHz (discarding all safety features and over- voltage limitations). In the Raspbian. Linux distro the overclocking options on boot can be done by a software command running . This is done by monitoring the core temperature of the chip, the CPU load, and dynamically adjusting clock speeds and the core voltage.
When the demand is low on the CPU or it is running too hot the performance is throttled, but if the CPU has much to do and the chip's temperature is acceptable, performance is temporarily increased with clock speeds of up to 1 GHz depending on the individual board and on which of the turbo settings is used. The seven overclock presets are: none; 7. MHz ARM, 2. 50 MHz core, 4. MHz SDRAM, 0 overvolt,modest; 8. MHz ARM, 2. 50 MHz core, 4. MHz SDRAM, 0 overvolt,medium; 9.
MHz ARM, 2. 50 MHz core, 4. MHz SDRAM, 2 overvolt,high; 9. MHz ARM, 2. 50 MHz core, 4.
MHz SDRAM, 6 overvolt,turbo; 1. MHz ARM, 5. 00 MHz core, 6. MHz SDRAM, 6 overvolt,Pi 2; 1. MHz ARM, 5. 00 MHz core, 5.
MHz SDRAM, 2 overvolt,Pi 3; 1. MHz ARM, 5. 50 MHz core, 5. MHz SDRAM, 6 overvolt. In system information CPU speed will appear as 1. MHz. When in idle speed lowers to 6. MHz. Simultaneously in high mode the core clock speed was lowered from 4. MHz, and in medium mode from 3.
MHz. The Raspberry Pi Zero runs at 1 GHz. On the older beta Model B boards, 1. MB was allocated by default to the GPU, leaving 1. MB for the CPU. The default split was 1. MB (RAM for CPU), which should be sufficient for standalone 1. D, but probably not for both together.
MB was for Linux only, with only a 1. D. 1. 28 MB was for heavy 3. D, possibly also with video decoding (e. But a week or so later the RPF released a new version of start. On the Model B and B+ the Ethernet port is provided by a built- in USB Ethernet adapter using the SMSC LAN9. As shipped (i. e., without custom overclocking) it can emit these: 6. The television signal standards supported are PAL- BGHID, PAL- M, PAL- N, NTSC and NTSC- J.
As a workaround, a program running on the Pi can retrieve the time from a network time server or from user input at boot time, thus knowing the time while powered on. To provide consistency of time for the file system, the Pi does automatically save the time it has on shutdown, and re- installs that time at boot.
A real- time hardware clock with battery backup, such as the DS1. I. Older boards had 2. MB (shared with GPU). P5 on the board and P6 on the schematics) of 8 pins offering access to an additional 4 GPIO connections. Models A+ and B+ provide GPIO access to the ACT status LED using GPIO 4. LED using GPIO 3. Accessories. In Raspbian, the user must enable the use of the camera board by running Raspi- config and selecting the camera option.
The cost of the camera module is . The dimensions are 2. It also includes an optional Arduino compatible controller to interface with the Pi. Each HAT board carries a small EEPROM (typically a CAT2. C3. 2WI- GT3). Other third party operating systems available via the official website include Ubuntu MATE, Snappy Ubuntu Core, Windows 1.
Io. T Core, RISC OS and specialised distributions for the Kodi media center and classroom management. It uses Raspbian repository, but it fits in a 1. MB SD card. Designed to run primarily in RAM.
IPFire – is a dedicated firewall/router distribution for the protection of a SOHOLAN; runs only on a Raspberry Pi 1; porting to the Raspberry Pi 2 is not planned for now. Application software use calls to closed source run- time libraries (Open. Max, Open. GL ES or Open. VG) which in turn calls an open source driver inside the Linux kernel, which then calls the closed source Video. Core IV GPU driver code. The API of the kernel driver is specific for these closed libraries.
Video applications use Open. MAX, 3. D applications use Open. GL ES and 2. D applications use Open. VG which both in turn use EGL. Open. MAX and EGL use the open source kernel driver in turn. There are Wolfram Language functions for accessing connected devices. Minecraft, camera preview and omxplayer) as well as non- X1.
Create 'actors' which live in 'worlds' to build games, simulations, and other graphical programs. Julia – an interactive and cross- platform programming language/environment, that runs on the Pi 1 and later. See also Pi- specific repository Julia. Berry. Lazarus – a Free Pascal RAD IDE resembling Delphi. Live. Code – educational RAD IDE descended from Hyper.
Card using English- like language to write event- handlers for WYSIWYG widgets runnable on desktop, mobile and Raspberry Pi platforms.