uart interface

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

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

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

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

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

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

Objective: to control UART serial port transmitting and receiving data in user space by reading and writing UART device files.Setting the UART baud rate, parity enable, and so on in user space is done through the Termios structure and the Termios library function , which requires the termios.h header file to be included in the application.I. Definition of Termios

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

uart_parityoddbit 5# Define uart_stopbits 3 // Stop bits Definition# Define uart_05stopbits 0x00# Define uart_1stopbit (0x01 # Define uart_15stopbits (0x02 # Define uart_2stopbits (0x03 // Modes Definition# Define uart_8bitsdata 0x01 // mode data cr [2: 0] 001# Define uart_7bitsdata 0x03 // mode data cr [2: 0] 011# Define uart_9bitsdata 0x04 // mode data cr [2: 0] 100# Define uart_8bitsdatawakeup 0x05 // mode data cr [2: 0] 101# Define uart_8bitsdataparity 0x07 // mode data cr [2: 0] 111 // --

AR9344 support two uart, the usual debugging serial port is UART0, the driver is using 8250, today because the project needs to enable UART1, the configuration process needs to pay attention to several points1.9344 Gpio Port is multiplexed, can flexibly configure most of the supported features, need to find two Gpio, configured as UART1_TD and UART1_RD function (if using hardware flow control, need to find two Gpio configured as CTS and RTS)2. The dri

Introduction: USART integrates SPI and UART, so only the SPI demo is not enough. Therefore, the simplest UART running routine is available. Send in a loop. Interrupt reception is used for receiving. Hardware preparation: tg stk. Connect the 4-pin and 6-pin ports of the 20 PIN expansion port. 4th feet are PD0, Tx, 6th feet are PD1, Rx. Software Process: After the UART