uart application

The first difference is of course the name:SPI (serial peripheral interface: serial peripheral interface );I2C (Inter IC Bus)UART (Universal Asynchronous Receiver Transmitter: Universal asynchronous transceiver)Second, the difference lies in the electrical signal line:The SPI bus consists of three signal lines: sclk, SDO, and SDI ). The SPI bus allows multiple SPI devices to connect to each other. The SPI device that provides the SPI serial clock is t

Step 1: Initialize the baud rate, line control register-query line Status Register-read data-Handle error status -Send data Step 1 UART initialization procedure 1. Set u0lcr bit bit7 to 1 so that u0dlm u0dll registers can be written. 2. Set the baud rate register value to fpclk/(16 * baud) High 8-bit write u0dlm low 8-bit write u0dll 3. Set u0lcr to 0. Disable u0dlm u0dll to write the remaining u0rbr bits. 4. Set u0lcr,

1 Take the program, note that the incoming is Norflash, at this time the button should be in the Norflash.2 when it comes to success, start running the program, you should push the button back to Nandflash, because the program is launched in Nandflash, he put norflash content into the Nandflash run, the CPU curing program to do.3 because the serial port is used at a speed of 9600, so your vim. KERMRC should also be changed to 9600.4 Lsusb Detect U-turn string device Lsmod detection driver exists

The serial communication interface is one of the most common methods for data communication between a processor and other devices. MyProgramThe library is for the msp430f14 series and msp430f16 series. I usually use the single-chip microcomputer: msp430f149 and msp430f169. Both single-chip microcomputer have two Enhanced serial communication interfaces, both of which can be synchronous or asynchronous communication. Even the 169 module usart0 can perform I2C communication. Here, we will only dis

/**************************************************************************** * 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

Reference: http://programmingadvent.blogspot.hk/2012/12/raspberry-pi-uart-with-pyserial.htmlRaspberry Pi UART with pyserial os:occidentalis v0.2Hardware:raspberry Pi Revision B with CobblerSetup:serial Loopback (Connect RX and TX pins on GPIO pins)Linux attempts to treat all devices as file system like devices, the UART that's available on the GPIO pins are locat

UART and Usart are single-chip serial communication, the difference between them is as follows: First look at the name: Uart:universal asynchronous receiver and transmitter universal asynchronous receiver/SenderUsart:universal synchronous asynchronous receiver and transmitter universal synchronous/Asynchronous Receiver/Sender As can be seen from the name, Usart on the basis of the UART added synchronizati

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

Serial communication is often used to the function, in the STM32 UART has the DMA function, and send and receive can use DMA, the use of DMA sent basically you will not encounter any problem, because when sent will tell the DMA to send the data length, DMA according to send the length of the direct send is OK, However, the use of DMA receive time is different, because sometimes the data receive is not every time is fixed length, but DMA only receive d

: Usart_gpio_init//function: UART GPIO initialization//Ingress parameters: none//Export parameters: none//Note://***************************************void usart_gpio_init ( void) {Gpio_inittypedef gpio_initstructure; Rcc_ahbperiphclockcmd (Rcc_ahbperiph_gpiob, ENABLE);//-----PB6 TX------------------PB7 RX-------------Gpio_ Initstructure.gpio_pin = gpio_pin_6| gpio_pin_7; Gpio_initstructure.gpio_mode = GPIO_MODE_AF; Gpio_initstructure

Misleading of UART instance demo in lpcxpresso Misleading of UART instance demo in lpcxpressoImport the UART project in example project. In the UART. c file, initialize the serial port processing function to assign the initial value of uartcount to 0.In the main function, after initialization, The uartcount value is u

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

Transferred from: http://blog.csdn.net/zeroboundary/article/details/8966586In 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 interpretation.In RS232, the RTS and CTS are used to switch direction in half-duplex mode, this paper does not expl

Code base (only two files were added on the base of HACKRF original code base, one file was changed):Https://github.com/JiaoXianjun/hackrf-UART-1602LCDThe goal is primarily to help people who want to change the debug HACKRF firmware. Because there is no debugging means to change the firmware basic two eyes a dark, groping in the darkness is difficult. The previous days to collect the aircraft firmware has been in the dark good grasp debugging means, s

UART (Universal asynchronous transmitter ER/transmitter)General asynchronous transceiverUART is a chip used to control computers and serial devices. One thing to note is that it provides an interface to the RS-232C 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 functi

One, Usart data transmission1, Usart Introduction1) in cc2530, there are two serial ports,UART0 corresponding external device IO pin relationship is: p0_2------RX, p0_3------TXUART1 corresponding external device IO pin relationship is: p0_5------RX, p0_4------TX2) modeUART mode and SPI mode2. UART Configuration1) clkconcmd=~0x40; Select the system clock source for external 32MHzcrystaloscillator.2) while (clkconsta0x40); Wait for crystal stability3) c

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_fnAAAVKUViYLs255.png "title=" Uart_ Arch.png "alt

Document PurposeShared memory is the sharing of memories, and the sharing of information between different processes through a small segment of memory, enabling interprocess communication. This article mainly introduces the transmission of information between Qualcomm Aboot (LK) and the kernel (kernel). In the traditional lk-"kernel information is used cmdline, but this method is only suitable for passing short information, for a large segment of information (such as all the