Query SMS:1 . Query all text messages with the same statusdirective: At+cmgl=nwhere n represents the number of 0-4. 0--unread text messages. Executes the command and then changes itself to read. 1--read SMS. 2--Draft. 3--SMS has been sent. 4--AllReturn (example):+cmgl:76,3,,200891683108200805f011620d91683194041338f50000ff0530972d8603--Serial number3--Status: Send--PDU string length2, query the specific serial number of SMSdirective: At+cmgr=n8where n represents the ordinalReturn (example):+cmgr:
* COM is displayed in the PC adapter that sets the pg/PC interface in Step 7. Indicates that the comport is replaced by another
ProgramOccupied. When kepserverex4.0 is used, when the Siemens S7 MPI device driver is used, the COM1 port is prompted
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# Include "SPCE061A. H "unsigned int tmp_data; void uart_init () {ASM (" int off "); // disable IRQ and FIQ interruption * p_iob_dir = 0x0400; * p_iob_attrib = 0x0480; * p_iob_data = 0x0000; *
In industrial control, there are two ways to read the status of the lower computer, one is the read port, for example, usingC LanguageInport () function. One is to use components, Microsoft's API-readfile (), and third-party controls. Reading the
I. RTS and CTS in the RS232 standardrts,cts------Request Send/clear send, for half-double hours of transceiver switching, belongs to the auxiliary flow control signal. Half-duplex means to say that when the hair is not received, when the collection is not sent. So how do you differentiate between sending and receiving? By default, the DCE sends data to the DTE, and when DTE decides to send data to
Transferred from: http://www.cnblogs.com/sunyubo/archive/2010/04/21/2282176.htmlI. RTS and CTS in the RS232 standardrts,cts------Request Send/clear send, for half-double hours of transceiver switching, belongs to the auxiliary flow control signal. Half-duplex means to say that when the hair is not received, when the collection is not sent. So how do you differentiate between sending and receiving? By default, the
data stream (STi ), sent to the handshake line switching matrix. DCE0 to dc4occupy 0th to 3rd time slots in the data frame sequentially, and the rest are idle. The process of receiving data streams is the opposite. A Data Stream (STo) in a fixed frame format is sent from the handshake line Switching Matrix to the CPLD. The first four digits of the 0th to 3rd time slots are extracted from the Syn of the synchronous signal and placed in the corresponding receiving register, then, it corresponds t
receive the Xon sent by the B device, the data is sent back to the B device. Similarly, b devices are similar, thus achieving speed matching between the receiving and transmitting parties.half-duplex direction switching : Using DTR(Date Terminal ready, Data terminal preparation) in RS232 to mainstream the DSR(data Set ready Similar to the aforementioned RTS and CTS. The DTE(Date Terminal equipment, Data terminal device) of the half-duplex communicati
device, the data is sent back to the B device. Similarly, b devices are similar, thus achieving speed matching between the receiving and transmitting parties.
Half-duplex directional switching: RS232 uses DTR (Date Terminal ready, Data terminal preparation) to mainstream control over the DSR (data Set ready, which is well-equipped), similar to the aforementioned RTS and CTS. The DTE (Date Terminal equipment, Data terminal device) of the half-duplex c
How to interconnect single-chip serial communication rxd with txd
Category:8051
2012-04-0711: 35
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Reprinted from: http://blog.csdn.net/sdwuyulunbi/article/details/6632382
I believe many people are confused about how to connect rxd and txd when the microcontroller communicates with a computer or chip. In some circuit diagrams, some are the direct connection method and some are the cross connection method, which makes people
Most users may not understand the router parameter settings, so I have studied the basic introduction and some configuration methods of the router parameter settings. I will share them with you here, I hope it will be useful to you. The types of interfaces supported by vro reflect the versatility of vro parameter settings.
Common interfaces include: common serial interfaces are converted to RS232 DTE/DCE in
technology of the current vro for data forwarding at line rate. Programmable ASIC integrates multiple functions on a single chip. It has the advantages of simple design, high reliability, and low power consumption, so that devices can achieve higher performance and lower costs.The use of ASIC chips can also increase the port density of devices. The port density of an ASIC chip is several times that of a General chip.The design of the programmable ASIC chip is the hardware guarantee implemented
Editor's note:This article will give you a detailed introduction to all aspects of the vro, including the vro type, vro configuration, route protocol support, multicast support, and vro performance.DirectoryRouter typeRouter configurationRoute Protocol SupportSupports the list protocol for multicast)Router performanceQoS capabilityGroup speech capability Router type This table mainly compares whether the vro is a modular structure. Vrouters with a modular structure are generally highly scalable
Interface Type
The types of interfaces supported by the vro reflect the versatility of the vro. Common interfaces include: common serial interfaces are converted to RS232 DTE/DCE interfaces, V.35 DTE/DCE interfaces, X.21 DTE/DCE interfaces, RS449 DTE/DCE interfaces, and EIA
With the development of China's routing industry, it also promotes the upgrade and upgrade of the router technology. Here we mainly introduce the router interfaces that are frequently used in the router technology, and the types of interfaces supported by the router, represents the versatility of routers.
Common interfaces include: common serial interfaces are converted to RS232 DTE/DCE interfaces, V.35 DTE
I have learned a little about vro configuration, so I have studied the performance indicators of vro configuration. I would like to share them with you here, hoping to help you. This table mainly compares whether the vro is a modular structure.
Vro configurations in a modular structure are generally highly scalable and support multiple port types, such as Ethernet interfaces, Fast Ethernet interfaces, and high-speed serial ports, the number of ports of various types is usually high. The fixed vr
http://blog.csdn.net/sdwuyulunbi/article/details/6632382Believe that a lot of people on the microcontroller and computer or chip communication, RXD and txd How to connect more confused. Because in some circuit diagram, there are some direct connection method, there are some cross-linking method, let a person a bit puzzled.The first thing to understand is the two concepts, DTE and DCE. DTE refers to data terminal equipment, the typical DTE is a compute
command allows more detailed service reports.Result code of at + CRC division. This command allows more detailed ringtone instructions when the call arrives.At + ilrr local DTE-DCE rate report.At + crlp radio communication line protocol parameters.At + dopt other radio communication line parameters.At % C data compression options.Whether at + DS allows v42 dual-degree data compression.Whether at + Dr reports v42 dual data compression.At/n data error
In our computer, interfaces and some bus functions and functions are standardized through some specific standards and protocols. Here we mainly introduce the RS-232C protocol for you. This Protocol has been applied not only in the computer field, but also in some electrical and mechanical fields with the development of this industry. Let's take a closer look at this special protocol.
RS-232-C
The RS-232C protocol is the EIA-RS-232C protocol, in which EIA (Electronic Industry Association) represe
In some electrical industries, we can involve RS-232C protocols. As the network expands, all walks of life will apply it to different places. So now the RS-232C Protocol holds some network applications.
RS-232-C
The RS-232C protocol is the EIA-RS-232C protocol, in which EIA (Electronic Industry Association) represents the American Association of electronics Industry, RS (recommeded standard) represents the Recommendation standard, 232 is the identification number, C Represents the latest version
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