Serial Port Complete - Latest Microcontroller projects
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A serial port is a computer interface that transmits data one bit at a time. In common use, the term “s ...
Chapter 1 Device developers have many options for computer interfaces. Table 1-1 com- pares popular w ...
Options and Choices Table 1-1: Comparison of popular computer interfaces. Where a standard doesn’t specify a maximum, the table ...
Chapter 1 A USB device accessed as a COM port doesn’t have to have an asynchronous serial interface. The device can have a para ...
Options and Choices These are some examples of ports controlled by UARTs: Microcontroller serial ports. Many microcontrollers c ...
Chapter 1 and notebook PCs. Other computer types also have serial ports that are built in or available via converters or expansi ...
Options and Choices If the connection is to a serial network, each computer must ignore communi- cations intended for other comp ...
Chapter 1 Additional status and control lines can provide other information such as the presence of a carrier frequency or a rin ...
Options and Choices intervals, each secondary computer sends its collected data to the primary com- puter, which stores the data ...
Chapter 1 These are just a few examples. This book will guide you in choosing compo- nents and writing programs for whatever ser ...
2 This chapter introduces formats and protocols used in asynchronous serial communications including low-l ...
Chapter 2 computer must match within a few percent. A transmitted Start bit synchro- nizes the transmitter’s and receiver’s cloc ...
Formats and Protocols For receivers that require a little extra time to accept received data, some UARTs enable the transmitter ...
Chapter 2 sions used in this book’s examples, each data-transition period represents one data bit, and the bit rate and baud rat ...
Formats and Protocols Some knowledge of how serial data transmits is useful in selecting a protocol and interface f ...
Chapter 2 to read the final bits, the timing may be off by so much that the receiver will read the wrong bits and might not dete ...
Formats and Protocols 6 In many serial-port applications on PCs, the user interface provides a combo bo ...
Chapter 2 The PIC18F4520 contains an enhanced USART that can detect and match a received bit rate. The sending computer must sen ...
Formats and Protocols The bits in each byte are numbered 0 through 7, with each bit representing the bit’s value (0 or 1) multip ...
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