16550 uart

Today, nothing is boring, write two blog to kill time ... This blog first introduces the basic principles of the UART, and then post my code. The UART is a serial data transmission format that sends and receives only one signal line for each use. It is often used in low-rate signal transmission, but it is necessary to change the transmission mode at high-speed data transmission, such as using Mac ETHERNET.

Original: Win10 IoT C # development 4-uart serial CommunicationWindows IoT Core is one of Microsoft's key products for the internet of things, enabling both the development of UI and user interaction, as well as the ability to control interfaces such as Gpio, making the original embedded cumbersome development simple. The remote Debug function allows for breakpoint tracing and debugging. The C # language itself also has a good user base, believing tha

Experiences in using the lpc2000 UART serial portIn view of some problems of zgpswh in the use of serial ports, I summarized my understanding in the previous stage, which is relatively one-sided. If not, please correct them. 1. The serial port receiving module of the lpc2000 series chip includes the receiving buffer register and shift register. After the received data enters the shift register, the data is transferred to the buffer register in paralle

Knowledge about serial ports Three independent serial ports, each of which can use DMA And interrupt operation. Each contains two 64-byte FIFO, one connection and one sending. The non-FIFO mode is equivalent to a register buffer mode in the FIFO mode. Each UART has seven statuses: overrun error, verification error, frame error, breakpoint, and receiving buffer. The sending buffer is empty and the sending shift register is empty. When receiving da

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

Note that it is not as easy as writing a pen. To make it easier to view code and reuse code again, we will post the S3C2440 UART driver code here. Use the friendly mini2440 Development Board and the development environment is realview MDK 4.22. In this Code, the initialization of gpio is completed in S3C2440. s and configured in the HTML method provided by Keil. The source code structure is simple and clear. For the original project, click the open li

I use the Jetson TX1 Development Board is Linux system out of the serial port file may be different from the other is not different can be used.I'm installing QT5.Create a none QT C project, developed in C languageDuring debugging two days results or send and receive display is not the same because the rs22 voltage and the UART TTL voltage mismatch due to the Development Board is not with max232 so to add the adapter board (

.... Handlerirq HANDLER Handleirq........; Setup IRQ Handler//Create an interrupt tableLDR R0,=handleirq; This routine isneeded LDR R1,=ISRIRQ;ifthere isn t'Subs PC,LR, #4'At0x18,0x1cstr r1,[r0] ... .... .....^ _isr_startaddress;0x33ffff00Handlereset #4Handleundef #4HANDLESWI #4Handlepabort #4Handledabort #4handlereserved #4HANDLEIRQ #4Handlefiq #4;0x33ffff1c; intvectortable;@0x33ff_ff20handleeint0 #4;0x33ffff20HandleEINT1 #4HandleEINT2 #4.................................HandleUART1 # 4; 0x33fff

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 the control port can be short-connected. In th

, Bluetooth, USB, boot, etc.) boot information is also saved in the/var/log directory, the name is DMESG file. More/var/log/dmesgDevelopment Board connected USB to UART serial port not responding--error debugging1. First of all, to see the serial port conversion line There is no problem, connected to the USB,/dev should be able to see the ttyUSB02. When you open the putty, you can connect. If the keyboard cannot enter data, the serial port of the conv

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

Both VGA and DVI are video transmission lines. The former is the traditional analog transmission, the latter species is more, there is only the transmission of digital or analog or digital mode is transmitted, in short, the latter video signal transmission quality is higher than the former, and transmission speed faster. Many displays on the market now use the DVI interface (including HDMI, HDTV, and DisplayPort, etc.)Interfaces are very easy to differentiate: rs232 should be a protocol standa

, and 15 times is output. TC is the number of output records. Each output time, TC is reduced by 1, and the value is 0, one-service mode for stopping DMA and waiting for other DMA requests. If an interrupt is set, the MDA is interrupted. Therefore, TC is the cycle.Code Area Main. c # Define global_clk 1 # include "def. H "# include" option. H "# include" 2440addr. H "# include" 2440lib. H "// function declaration # include" 2440slib. H "# include" MMU. H "# include" profile. H "// extern void d

It is suitable for msp430g2553 MCU to use the HC-SR04 ultrasonic ranging module and communicates with PC using UART. Copy Code code as follows: #include The last time a long current_time;//was measured /*mypro*/ #define LED_1 BIT0 #define SW_2 BIT3 #define Ta1_1 BIT2//ta0.1 hc-sr04 Echo #define TRIG BIT4//hc-sr04 TRIG #define ACCU_GRD 7 Grade "xxx.x" + '//accuracy ' #define MIN_UNIT_TO1M 1000//1 m to 1 mm /*timer0*/#define SOUR

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

fetched): \kernel\out\vmlinuxOther Notes:[SD0] SET_CLK (52000kHz): SCLK (50000kHz) indicates that eMMC works in the preloader phase at 52MHZ!!!, MSDC0 setFor data CRC Error,time out in log, it is often necessary to reduce the EMMC's operating frequency, and the PL, LK, and kernel phase CLK settings are\mediatek\platform\mt6xxx\preloader\src\drivers\msdc.cvoid Msdc_config_clock (struct mmc_host *host, int DDR, u32 Hz)\mediatek\platform\mt6xxx\lk\msdc.cvoid Msdc_config_clock (struct mmc_host *hos