Arm-linux s5pv210 UART Driver (3)----serial core layer, key structure, interface relationshipAlthough a specific UART device driver can be designed with a TTY-driven design, which defines Tty_driver and implements Tty_operations member functions, Linux is already in the file Serial_ The universal TTY drive layer of the UART device, called the core layer of the se
This article mainly introduces the use of UART and PC communication to achieve msp430g2553 single chip ultrasonic Ranging example, need friends can refer to the next
It is suitable for msp430g2553 MCU to use the HC-SR04 ultrasonic ranging module and communicates with PC using UART.
The code is as follows:
#include
The last time a long current_time;//was measured
/*mypro*/
#define LED_1 BIT0
#define S
Recently too busy, there is no time to write about the ucos-ii transplant, first of all the work is easy to make a mistake in the knowledge points recorded, about the CTS and RTS.
In RS232 the CTS and RTS have a clear meaning, but since Hayes (HAYES) introduced smart Cat (SmartModem) is a bit confusing, but now this meaning for the mainstream, the main chip manufacturers of the UART controller flow control basic use HAYES Modem flow control interpreta
Last year, noridc developed a chip that integrates Bluetooth 4.0 and can communicate with 24l01. The film encapsulation can be very small, and the power consumption is very low. It is very suitable for wearable devices, so I recently had a set of second-hand ak ii and no becon board. I first played some basic peripherals, And now I started to develop ble.
Under the official SDK directory, we can find the project file Nordic \ nrf51822 \ board \ pca10001 \ ble \ experimental \ ble_app_uart, in ad
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
Serial communication: UART, SPI, i²c differential "reference"1, the UART is two lines, one sends a receive, can be full duplex communication, the number of lines is also relatively small. The data is transmitted asynchronously, the timing requirements of both sides are stricter, and the communication speed is not very fast. The most used on multi-machine communication.2, SPI interface and above the
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
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
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
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
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.
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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
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