uart application

In the low-end router using DISP interface to view the corresponding serial port status information, including DCD, DTR, DSR, RTS and CTS, such as five status indicators respectively mean? DCD (Data Carrier Detect-carrier detection) DTR (data Terminal ready, terminal prepared) DSR (data Set Ready), RTS (Request to send) CT S (Clear to send clean send) in these five control signals, DTR and RTS are DTE devices (data terminal equipment, which is the router in the actual

==== This article is the original site. You are welcome to reprint it! Reprinted please indicate the source: http://blog.csdn.net/yyplc==== This article is original in itspy. If you copy or repost it, please indicate the original source at http://blog.csdn.net/yyplc/article/details/7196290. thank you! Software (linux-2.6.30.4 ): The serial port driver of Linux is the same as that of general character devices. It adopts a hierarchical architecture and is regarded as a serial system. (1) underlyin

Differences: SPI: high-speed synchronous serial port. 3 ~ 4-line interface, independent and synchronous sending and receiving UART: Universal asynchronous serial port. Bidirectional communication based on the standard baud rate is slow I2C: A three-line serial transmission mode. The communication protocol and usage can be found on the Internet. Bidirectional data transmission with three linesSerial peripheral interfaceUART: Universal asynchronous tra

Turn from: Sina @walkantPart Four serial interface UART and consoleDetailed reference: http://dev.ardupilot.com/wiki/learning-ardupilot-uarts-and-the-console/UART is very important for debugging output, digital transmission, GPS module and so on.1, 5 UARTA total of 5 UART are defined, and their uses are: The uarta– serial terminal, usually a micro USB in

Although the driver of a specific UART device can completely follow 14.2 ~ The 14.5 method is designed to define tty_driver and implement the member functions. However, Linux has implemented the universal tty driver layer (called the serial port core layer) of the UART device in the file serial_core.c ), in this way, the main task of UART driver is transformed in

Make sure that the initialize of the object has been initialized by using uboot. // Serial register // Uart0 # Defineulcon0 * (vu32 *) 0x7f005000) // UART channel 0-row control register # Defineucon0 * (vu32 *) 0x7f005004) // UART channel 0 control register # Defineufcon0 * (vu32 *) 0x7f005008) // UART channel 0 FIFO control register # Defineumcon0 * (vu32 *) 0x

Uart:university asynchronous receiver and transmitter UART//Universal asynchronous receiver and transmitterWhy should have the serial port: Because many embedded device does not have the display, cannot obtain the real data information of the device, so can connect through UART serial port and HyperTerminal, print the output information of the embedded device. can also be traced and debugged via serial port

UART is a chip used to control computers and serial devices. One thing to note is that it provides an interface to the data terminal device so that the computer can communicate with the modem or other serial devices that use the RS-232C interface. As part of the interface, UART also provides the following functions: Converts parallel data transmitted from within the computer to the output serial dat

The problem is: I defined the UART interface of BF533 as the DMA mode to receive data, but the received data is always zero. I don't know if there is a problem with my configuration.Please give me some advice. Thank you. The configuration is as follows:Void init_dma (void){* Pdma6_peripheral_map = 0x6000;* Pdma6_config = wdsize_8 | di_en; (transmitted in bytes | interrupted upon completion of reception)* Pdma6_x_count = 0xa; (buffer of 10 bytes)* Pdma

What are the differences between VGA, DVI, RS232, UART, SCSI, SATA, and other interfaces?Both VGA and DVI are video transmission lines. The former is a traditional analog transmission, and the latter has many types, which only transmits numbers or analog or digital models. In short, the latter's video signal transmission quality is higher than the former, and the transmission speed is faster. At present, many monitors on the market use DVI interfaces

To do embedded development, UART is almost essential, debugging serial port, GPS, GPRS, Bluetooth and many other modules are used UART interface. Nowadays the hot IoT also has the UART figure, the serial port ble, WIFI, Zigbee, Lora and so on module, a bunch of piles. The NUC972 mentioned in the previous article even built up 11

This source is based on the linux3.3.0 version of the kernel in the Dvsdk_omapl138-evm_04_03_00_06_setuplinux package. Implementation of EDMA support UART features mainly modify DMA and 8250 of the source code. First, the DMA channel resource is allocated for OMAPL138 arm and DSP, which has three uart,uart1 occupying edma0cc0 Channel8 (Rx), Channel9 (TX) channel and SLOT8 (RX) and Slot9 (TX); The UART2 occu

about UARTUniversal Asynchronous Transceiver (Universal asynchronous Receiver/transmitter), commonly referred to as a UART. UART communication is quite common in the work, and the project needs to generate a UART signal, which is recorded in the blog. The UART is asynchronous communication because it has only one line

The previous "UART explained" introduced the basic information of the UART, focusing on the signal of the UART. The article excerpt from this article focuses on the baud rate (Baud rates) related content, the higher the baud rate, the faster the transmission speed, but the actual use of the baud rate is higher the better, how much appropriate? The answer is given

Http://blog.chinaaet.com/detail/25424.html Continue to learn the serial communication of ADSP-BF533 today, UART (Universal Asynchronous Receiver ER/transmitter (UART) Port) interface, is a full duplex universal serial interface, composed of RX and TX two lines, the extended RS232 chip can communicate directly with computer serial ports, which is usually used as the command and data communication interface

Did not study carefully, the use of the next, summed up the point, also searched a bit of information. --------------------------------------------------------------------------------------------------------------- ------------- Simple to speak: (UART and COM) Embedded inside said serial port, generally refers to the UART port, but we often do not know it and COM port differences, as well as RS232, TTL and

Reprinted please indicate from: http://blog.csdn.net/icyfox_bupt/article/details/6766830 Baidu Encyclopedia: UART: Universal asynchronous transmitter/transmitter, a general asynchronous receiving/sending device. UART is a parallel input into a Serial Output chip, usually integrated on the motherboard, most of which are 16550afn chips. Lm3s series single-chip microcomputer generally have

Uartn_br: UART baud rate registerUartn_br []: The content is regularly loaded by the timer's register.Uartn_cr.run = 0 can be loaded until uartn_cr.run = 1 write is invalidUartn_txbufr: UART Transfer RegisterUartn_txbufr [8]: the eighth or even parity bits for data transmission, wake-up bits, or undefined bits are determined by the corresponding operation mode.1. In 001 mode, this bit is written to 0.2. If

First blog, the first record of the one weeks of learning content.The first of the UART learning path is the introduction of the basic concept of the UART. Follow-up will use stm32f407 serial port and PC communication. Finally, Verilog HDL is used to write the serial transmitting module and receiving module, complete the simulation and complete the communication on the Zedboard board.First clarify what is

Why does UART need FIFO? Modern CPUs run faster and faster. UART usually has a baud rate of less than 10 M. In the absence of FIFO, CPU time is consumed for each data filling to or from UART, this is a great waste. Therefore, the UART is configured with FIFO as the buffer for data sending and receiving on the hardware.