uart interface

==== 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

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 rou

1. System OverviewThis design uses NIOS2 32-bit processor, through the SPI interface to the SD/TF card in the JPEG image data read into memory, SD/TF card file system for the FAT32,NIOS2 software implementation of the JPEG image through the UART serial port sent to the host computer display, the system diagram is as follows:650) this.width=650; "src=" Https://s3.51cto.com/wyfs02/M00/8F/A9/wKiom1jnqIqQ3_fnAA

, smbus™ or spi™ interface simplifies i/o Port extension. When the microcontroller or chipset does not have enough i/o port, or when the system Need to use remote serial communication or control, gpio The product can provide additional control and monitoring capabilities. Each GPIO Port can be individually configured as input or output by software. Maxim 's gpio product line includes 8 -Port-to - Port Gpio with push-pull or open-d

connection method:Figure 2 UART Flow Control. Specifically, when the receiver (uart2) deems it acceptable to accept UART data, the RTS is set to a valid bit. The CTS pin of the sender (uart1) receives this signal before sending the data. Generally, when the UART data receiving cache is larger than two bytes free, you can set RTS to receive data effectively. Of c

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

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

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

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

This article was reproduced from: http://blog.csdn.net/xzongyuan/article/details/11593101Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.Using Putty for serial debugging is very simple. Only need to set the port (Serial line), Linux, the default interface after the serial port is ttyS0, or ttyUSB0 (corresponding to the USB to the serial port), if more than one, will show ttyS1 or Ttyusb1;windo

STM32 UART Single-line half-duplex mode (cube version) 1. IntroductionIn some cases, a three-wire serial communication is required (only one of the signal lines), which requires a single-line half-duplex mode for communication. In this case, in the process of data protocol transmission, the signal end needs to switch back and forth in the input and output mode. Alternatively, the transmit and interface of t

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.

; p[i-1]!=null; i++){P[i] = strtok (NULL, "");}for (i=0; p[i]!=null; i++){printf ("%s\n", P[i]);}return 0;Strtok Note that the size of P, will be more than one NULL, but this is only used to judge, P[i]=null, and there is no real assignment.Strtok will automatically add the split string to the rear28 because the Strtok,Add static, the last add-LC must note that this is the abbreviation of LIBC.A.$ (LD) $^ $ (ldflags)-T Map.lds-o $ (NAME). Elf#-static using static libraries#-L absolute Path, dire

. --------------------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------------------- ------------------- The DB9 UART definition male is 2-RX,3-TX,5-GND, the corresponding parent is 2-TX,3-RX,5-GND, thi

Cortex-M3 learning and debugging of stm32f10x UART In the process of learning the stm32f10x Development Board, the first learning routine is the UART Printing program. Due to the previous experience of single-chip microcomputer, UART programming is not unfamiliar, however, in order to lay a solid foundation for programming, the routine should be analyzed and intr

UART initialization. 1. We can see through the schematic diagram that the serial port rxd and txd are connected to ok6410 gpa0 and gpa1 respectively .. So first set the input and output status of gpio: 0010 = UART rxd [0] 0010 = UART txd [0] At the same time, set the corresponding up/down resistance relationship. rGPACON = (rGPACON ~(0xff rGPAPUD = (rGPAPUD ~(

We manufacture a new accessory for ipad/iphone which should transfer commands to the IPad. We Use the UART (through a certain apple-protocol called Lingo). My shows that I can only use USB (30PIN Connector) and custom protocols.Question: Is there any-to-use UART-to-connect to the IPad accessory from APP side? If the protocol is implemented in UART, w

/**************************************************************************** * I.MX6 Find occupied UART process * NOTE: * Because it is not clear which process occupies the specified UART port, then the front in the UART driver added the display * baud rate set code, this time by the dichotomy annotation init.rc, init.freescale.rc service * To determine if the p