xbee uart

S5PV210 Hardware StructureThis chapter describes the hardware structure of the s5pv210, including the s5pv210 microprocessor, GPIO interface, PWM timer, DMA controller, UART serial interface, SPI interface, IIC bus interface and ADC and touch screen interface. The application examples and drivers of the interface are introduced.The s5pv210 is a 32-bit microprocessor with low power features that provide high-performance microprocessor solutions for mob

transfer large-capacity files, especially the need to eliminate the "hidden terminal" phenomenon occurs. IEEE802.11 offers the following solutions. In the parameter configuration, if the Rts/cts protocol is used, and the maximum number of bytes is set at the same time----the Rts/cts handshake protocol is initiated once the data to be transmitted is greater than this upper limit: First, a sends an RTS signal to B, indicating that a sends some data to B, and B receives the RTS, A CTS signal to al

The ft232h is the single channel version, the ft2232h is the Dual-channel, and there are also anft4232h Quad channel part.While these is all logically the same, with different numbers of UART channels, there is some performance and functional Differences between them. The ft232h has merely 1 KB of ring buffer, which can is overwhelmed if running at a high baud rate, and with a slow offtak E by the host device. The FT2232H has a 4 kB ring buff

following article is detailed.Then the related properties of the configuration peripherals, depending on the specific device, if the device needs to use the interrupt mode, must be able to enable the corresponding device interrupt, and then need to enable the relevant equipment.Finally, if the device uses the interrupt function, it also needs to fill in the corresponding interrupt service program, in the service program to do the corresponding operation.2, the

secbulk.c secbulk.ko.unsigned SECBULK.MOD.O[Email protected] secbulk]# insmod./sec[Email protected] secbulk]# Dmesgbulk.koUSB 2-2.2:new Full Speed USB device using UHCI_HCD and address 8USB 2-2.2:new USB device found, idvendor=1a86, idproduct=7523USB 2-2.2:new USB Device strings:mfr=0, product=2, serialnumber=0USB 2-2.2:product:usb2.0-ser!USB 2-2.2:configuration #1 chosen from 1 choicech341 2-2.2:1.0:ch341-uart Converter DetectedUSB 2-2.2:ch341-

SECBULK.OModules.order secbulk.c secbulk.ko.unsigned SECBULK.MOD.O[Email protected] secbulk]# insmod./sec[Email protected] secbulk]# Dmesgbulk.koUSB 2-2.2:new Full Speed USB device using UHCI_HCD and address 8USB 2-2.2:new USB device found, idvendor=1a86, idproduct=7523USB 2-2.2:new USB Device strings:mfr=0, product=2, serialnumber=0USB 2-2.2:product:usb2.0-ser!USB 2-2.2:configuration #1 chosen from 1 choicech341 2-2.2:1.0:ch341-uart Converter Detect

come to the urgent write to memory, when the DMA to the peripheral to write data supplied by the processor, DMA will get data directly from the DDR, moving to the peripheral, and this data is not intended to carry the data, in this case to call the cache writeback function, before the DMA data transfer to write the cache data into the DDR, to ensure the consistency of the DDR and cache data. 4:EDMA control of data handling between DDR and serial port Due to the EDMA of 64 events and peripherals

,#endifgenericapp_processevent//self-defined task handler function};Initialize the task:void Osalinittasks (void)//Add a task ID for each process to use as a lookup task{Uint8 TaskID = 0;Tasksevents = (UInt16 *) osal_mem_alloc (sizeof (uint16) * taskscnt);Osal_memset (tasksevents, 0, (sizeof (uint16) * taskscnt));Mactaskinit (taskid++); task ID number for//MAC layerNwk_init (taskid++);//Network ID AssignmentHal_init (taskid++);//Hardware ID Assignment#if defined (mt_task)Mt_taskinit (taskid++);#

(1) Dma_1: memory to periheral Read_master: Address of the array in SDRAM Write_master: UART txdtxddata address (2) uart ip Customization (3) Dma ip Customization According to the DMA ds, at least two times the read_master depth is required. Otherwise, an error will occur (1024 is prepared here, so an increase of 11: bit is generated) The number of times is the length of the

are placed in the xdata area. If you want to save data space, you must use the large mode to place the variables of the undefined memory location in the data area (it is of course best to specify the memory type for all variables). But when you use pointers, you specify the pointer to the type. In C51, a generic pointer that defines a memory type occupies 3 bytes, two pointers to the data area occupy only 1 bytes, and a pointer to the XData area occupies 2 bytes (for example, p points to data a

because the data block delivery begins to be indicated by the synchronous character, and the synchronization between the sending and receiving ends is required by the clock, the hardware is more complicated. Direction of communicationIn serial communication, the one-way transmission that can only be sent or received by the communication interface is called a single-work transmission , and the two-way transmission of data is called Duplex transmission . Half-duplex transmission between the two m

for initializing the page table. Check carefully and find that it is because DRAM is not initialized. After DRAM Initialization is added, first put the flashlight program behind DRAM initialization and you can find it. At this time, unfortunately, when I moved the flashlight program, I only copied half of the Code. Of course, I did not check the code carefully, I suspect that the MMU initialization code is 2440 can not be used for 6410 (lazy, guilty), so find the arm11jzf-s manual, a few hundre

..16s3c6410:initialising architecturebio:create Slab Lt;bio-0> at 0usbcore:registered new Interface driver usbfsusbcore:registered new interface driver Hubusbcore:regist Ered new device driver Usbromfs MTD (C) Red Hat, Inc.io Scheduler NoOp Registeredio Scheduler deadline Registeredio s Cheduler CFQ registered (default) Start plist testend plist tests3c-fb s3c-fb:window 0:fbserial:8250/16550 driver, 4 por TS, IRQ sharing disableds3c6400-uart.0:ttysac

CC2430 data sheet. Data Reception on the UART is Initiatedwhen a 1 are written to the uxcsr.re bit The UART would then search for a valid start bit on the RXDX input pin and set the uxcsr.active bit High. When a validstart bit had been detected the received byte is shifted into the receive register. The Uxcsr.rx_byte bit is set and a receive interrupt are generated when the operation have completed. The re

ZZ from:http://blog.csdn.net/ly601579033/article/details/48318239 ============================================================= The general flowchart is as follows: After power-on, the Reset,arm core starts executing the Boot ROM, with the following actions: (code is cured in ROM) 1. Initialize the built-in SRAM stack 2, initialize the NAND/EMMC (mobile phone built-in storage) 3. Import the pre-loader stored in NAND into the SRAM 4. Jump to SRAM to execute Pre-loader Perform Pre-loader operati

This feature has been raised on the Qualcomm platform and Samsung platforms, based on Android 6.0, which uses the Bluetooth feature on the phone as a Bluetooth headset. Bluetooth phone and Bluetooth music between them, the difference between the high-real-time Bluetooth phone calls, and its A2DP use of the physical path is not consistent, Bluetooth phone to take the PCM physical path, while Bluetooth music to go the UART path. Key Words hfpclient BT S

I haven't updated my blog for a long time. Don't think I'm too lazy because I started school, but my study in the New Tang Dynasty is not over. I haven't written a blog for such a long time because I encountered a tangle problem during my learning process. This problem has been nearly three weeks since January 1, September 1, that is, RS485 communication, I would like to write down my own mistakes to avoid detours when I see the article. If you want to use the 485 communication function, you wil

language) to implement the quasi-Communication Letter Number _ p and _ outp.---- Although the number of API functions in Windows is widely used, the complexity is fixed by the complexity, the programming process is divided into the initial string port, configuration string port, ultra-time control system, data transmission, and closed string port.---- Connect through VC ++---- 1. initialize the communication interface---- Before passing through the serial port of the computing machine to send a

Read the printk code We usually use printk when writing kernel code. here we can see how printk is associated with UART. I will not introduce hardware related to UART, so easy. Here we just read the printk code to see the association with the UART driver. Printk --- the function is implemented in the kernel/printk. c file. Many of the following functions are in t

. Under the shift pulse of the main device, the data is transmitted by bit, with the highest position in front and the lowest position in the back, full Duplex Communication.If you use a general IO port to simulate the SPI bus, you must have an output port (SDO), one input port (SDI), and the other port depends on the type of the implemented device, if you want to implement a Master/Slave Device, You need to input the output port. If you want to implement only the master device, you need to outp