A brief guide to the topics about web site design and procurements

This document is a brief guide to the tribulations we encountered on the discussions with internal departments, external partners and local groups, website design and procurement.

A website that cannot be seen by someone due to ignorance and laziness by the web developer, no matter how pretty the web design is reflected in its organization and the information you are trying to convey.

If the web designer you are considering has no idea that most of these questions, or disagree with the sources attached, without providing an equivalent material certified, then maybe you should take your website and your money someone who cares for your information most of their design.

If you want that is also relevant to existing websites, such as laws and guidelines referred to be still valid. You can use a “. Org.uk” display name that you are a nonprofit organization. This must be registered with the Secretariat of the organization, or other person responsible for the organization. Continue reading

USB SPI Adapter

The Serial Peripheral Interface (abbreviated to SPI) is a device , which with the help of USB GPIO/SPI/I2C Bus provides communication between a USB SPI master and a USB SPI slave. There are many USB SPI/I2C/GPIO slaves can be connected to a single USB SPI master, which has already been set up. Differ to USB-I2C Adapter, where a master (according to the protocol) can be any of connected devices.

The USB-SPI master can send data to several USB SPI slaves at the same time, as the USB SPI master has a separate line for sending data (MOSI line) and for receiving data (MISO line). Each USB SPI slave has its MOSI (Master Out Slave In) and MISO (Master In Slave Out) lines.

A USB SPI slave device is selected when the USB-SPI master sends NSS (Slave Select) signal. If there are two or more slaves, the USB SPI master device generates a separate slave select (SS) signal for each slave.

Except of MOSI and MISO lines, the USB SPI master has another pair of control lines:

  • Serial Clock line (SPCK).This line controls the flow of data.
  • Slave Select (NSS). This line helps hardware to connect and disconnect slaves from the master device.

As I have already told you, the master can transmits data to several slaves, but only one slave can answer to the master at any given time. Than in a logical order.