parallel slave port requirements

... khác  của  master  để  điều  khiển PSP slave (dùng Port B và Port A chẳng hạn) mà không nhất thiết phải là port D và  port E.  Ngoài ra, ta chỉ sử dụng một PSP slave nên việc điều khiển chân CS* (Chip Select) là  ... ;‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐  #define  READ   PORTE,0  #define  WRITE  PORTE,1  #define  CS    PORTE,2    #define  LEDPORT  PORTB  ;========================================================================== ... ;‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐    #define  READ   PORTE,0    #define  WRITE  PORTE,1    #define  CS    PORTE,2      #define  READBUTTON  PORTA,0    #define  WRITEBUTTON  PORTA,1  ;‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ ...

Ngày tải lên: 03/07/2014, 20:20

... OUTDATA,W PORTD b'11000000' ;Set output Data in PORTD Start ;Select register Bank1 ;Set RD, WR, and CS as ; inputs, Enable Parallel Slave port ;Set Port_ B to all outputs ; ;Enable Parallel Slave Port ... - Interrupt flag register ;* TRISE - Parallel slave port flag register ;* PORTD - Input data from slave port ;* ;* Outputs: ;* PORTD - Output data to slave port ;* INDATA - Input data queue ;* ... (must be cleared in software) = No overflow occurred bit 4: PSPMODE: Parallel Slave Port Mode Select bit = Parallel slave port mode = General purpose I/O mode bit 3: Unimplemented: Read as '0'...

Ngày tải lên: 11/01/2016, 11:52

... ("Status port = %Xh\n",StatusPort); return 0; Pascal Pascal programmers can use the port function to access parallel ports To write AAh to a Data port at 378h: port[ 378h]:=AAh To read a Status port ... early PCs, the parallel port had a base address of 3BCh On newer systems, the parallel port is most often at 378h But all three addresses are reserved for parallel ports, and if the port' s hardware ... the market for a new parallel port or peripheral, it's worth trying to find out if the peripheral supports using EPP or ECP mode with your port Port Hardware The parallel port' s hardware includes...

Ngày tải lên: 22/01/2014, 11:20

... the parallel port Any port that provides parallel output (as opposed to ports that provide data serially) is a parallel port, but in PC jargon, the term parallel port refers to ports conforming ... Chapter The Parallel Printer Adapter 25 Anatomy of the Parallel Printer Port 26 The DATA Port 29 The CONTROL Port 31 The STATUS Port 33 Printing with the Parallel Adapter 36 Using the Parallel Printer ... to the PC through the parallel printer adapter (i.e., the parallel port) Parallel ports are universally available on all PCs and compatibles Another benefit of the parallel port is that the IEEE...

Ngày tải lên: 04/11/2013, 18:15

... */ outportb(picaddr+1,inportb(picaddr+1) & (0xFF - picmask)); /* Un-Mask Pic */ outportb(CONTROL, inportb(CONTROL) | 0x10); /* Enable Parallel Port IRQ's */ clrscr(); printf( "Parallel Port Interrupt ... Standard Parallel Port Page 11 Interfacing the Standard Parallel Port http://www.senet.com.au/~cpeacock outportb(CONTROL, inportb(CONTROL) & 0xFE); /* Select High Nibble (B)*/ a = a |(inportb(STATUS) ... Occurred \nCheck IRQ Number, Port Address ” “and Wiring."); } outportb(CONTROL, inportb(CONTROL) & 0xEF); /* Disable Parallel Port IRQ's */ outportb(picaddr+1,inportb(picaddr+1) | picmask); /*...

Ngày tải lên: 12/12/2013, 04:15

... (SPP) The parallel port in the original IBM PC, and any port that emulates the original port' s design, is sometimes called the SPP, for standard parallel port, even though the original port had ... early PCs, the parallel port had a base address of 3BCh On newer systems, the parallel port is most often at 378h But all three addresses are reserved for parallel ports, and if the port' s hardware ... the market for a new parallel port or peripheral, it's worth trying to find out if the peripheral supports using EPP or ECP mode with your port Port Hardware The parallel port' s hardware includes...

Ngày tải lên: 15/12/2013, 13:15

... current, and if your parallel port has weak outputs, you may have problems in using other devices on the same port as the key Alternatives to the Parallel Port The parallel port is just one of ... for a few ports where this bit performs the direction-setting function normally done by C5 Bidirectional Ports On the original parallel port, the Data port was designed as an output-only port The ... fourth port Windows 95 doesn't depend on the BIOS table for storing port addresses, and does allow a fourth LPT port Many programs that access the parallel port use this table to get a port' s...

Ngày tải lên: 15/12/2013, 13:15

... EPP and ECP Support A port that supports EPP or ECP modes of data transfer has the best chance for fast parallel- port transfers An SPP requires four port writes to read the Status port, write a ... to the parallel port BytesWritten = VbRealModeIntX(&H21, InRegs, OutRegs) Listing 2-5: Using DOS Interrupt 21 h, Function 40h, to write a block of data to the parallel port 38 Parallel Port Complete ... the Data port Parallel Port Complete 31 Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark Chapter These methods won't write to the Data port if the Status port' s Busy...

Ngày tải lên: 15/12/2013, 13:15

... DataPortRead% (BaseAddress%) 'Reads a parallel port' s Data port DataPortRead = Inp(BaseAddress) End Function Sub DataPortWrite (BaseAddress%, ByteToWrite%) 'Writes a byte to a parallel port' s ... ControlPortRead% (BaseAddress%) 'Reads a parallel port' s Control port 'Calculates the Control -port address from the port' s 'base address, and inverts bits 0, 1, & of the byte read 'The Control -port ... port' s Data port Out BaseAddress, ByteToWrite End Sub Function StatusPortRead% (BaseAddress%) 'Reads a parallel port' s Status port 'Calculates the Status -port address from the port' s 'base...

Ngày tải lên: 24/12/2013, 19:15

... El e TestPort = True Port( PortIndex) Enabled = True Port( PortIndex) PortType = PortType Port( PortIndex) Enabled = True If EcpExists Then Port( PortIndex) EcpModeValue = EcpModeValue Port( PortIndex) ... End If Else PortType End If End if End if If PortType = "" Then False frmSelectPort optPortName(Portlndex) Enabled Port( PortIndex) PortType = "" Port( PortIndex) Address False Port( PortIndex) Enabled ... Tools [lptdata] PortOAddress=888 PortlAddress=632 Port2 Address=0 Port3 Address=256 PortOType=ECP PortlType=SPP Port2 Type= Port3 Type=SPP PortOEnabled=-1 PortlEnabled=-1 Port2 Enabled=0 Port3 Enabled=-1...

Ngày tải lên: 24/12/2013, 19:15

... the Control port Dim ControlPortData As Integer ControlPortData = ControlPortRead(BaseAddress) BitToggle ControlPortData, Index ControlPortWrite BaseAddress, ControlPortData ReadPorts (BaseAddress) ... `toggle a bit at the Data port Dim DataPortData As Integer DataPortData = DataPortRead(BaseAddress) BitToggle DataPortData, Index DataPortWrite BaseAddress, DataPortData ReadPorts (BaseAddress) End ... the parallel port, and on choosing cables to connect the circuits There's also a section on how and when you can use the parallel port as a power source for low-power devices Many parallel ports...

Ngày tải lên: 24/12/2013, 19:15

... typical parallel cable From this, you might think that a parallel cable isn't a transmission line because the parallel port' s maximum rate of transmitting is much less than Mhz But what's important ... to a regulated +SV The parallel port' s inputs require TTL logic levels, so any logic-high outputs that connect to the parallel- port inputs should be at least 2.4V (Status -port inputs may have pullups ... (CENTRONICS) RECEPTACLE IEEE PLUG 1284-C Figure 6-2 : Parallel- port devices and cables may use any of these connector types Cable Choices Parallel- port cables may vary in connector type, shielding,...

Ngày tải lên: 24/12/2013, 19:15

... chapter shows examples of these, plus a port- expansion circuit that increases the number of outputs that the port controls Output Expansion The parallel port has twelve outputs, including the ... each value at CBA corresponding to Parallel Port Complete 129 Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark w O PC PARALLEL PORT 25-P1N UI D-CONNECTOR 74LS244 BUFFER ... to drive a high-current load directly from a parallel- port output Use buffers between the cable and your circuits Because the original parallel port had no published specification, it's hard...

Ngày tải lên: 24/12/2013, 19:15

... using the Status and Control ports 152 Parallel Port Complete Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark Input Applications PC PARALLEL PORT 2S-PIN D-CONNECTOR STATUS ... the parallel port for input The examples include latched digital inputs, an expanded input port of 40 bits, and an interface to an analog-to-digital converter Reading a Byte On the original parallel ... `Latch the data ControlPortWrite BaseAddress, Clock ControlPortWrite BaseAddress, `Read the nibbles at bits 4-7 LowNibble = StatusPortRead(BaseAddress) \ &H10 ControlPortWrite BaseAddress, SelectHighNibble...

Ngày tải lên: 24/12/2013, 19:15

... can use the port' s Data and Control outputs to control other types of displays if the need arises 14g Parallel Port Complete Input Applications Input Applications Because the parallel port' s most ... Figure 8-2 : Eight latched input bits, using the Status and Control ports 152 Parallel Port Complete Input Applications PC PARALLEL PORT 2S-PIN D-CONNECTOR STATUS CONTROL 74HCT244 BUFFER S3 S4 SS ... expanded input port of 40 bits, and an interface to an analog-to-digital converter Reading a Byte On the original parallel port, there is no way to read eight bits from a single port register...

Ngày tải lên: 24/12/2013, 19:15

... PARALLEL PORT Ngoài số trường hợp Masking ta sử dụng phép Or PARALLEL PORT PARALLEL PORT PARALLEL PORT PARALLEL PORT PARALLEL PORT PARALLEL PORT PARALLEL PORT PARALLEL PORT PARALLEL PORT PARALLEL PORT ... PARALLEL PORT PARALLEL PORT PARALLEL PORT PARALLEL PORT PARALLEL PORT PARALLEL PORT PARALLEL PORT PARALLEL PORT PARALLEL PORT PARALLEL PORT PARALLEL PORT ... PARALLEL PORT PARALLEL PORT Kỹ thuật mặt nạ - Masking: Kỹ thuật Masking kỹ thuật “che” “hiện” số Bit mong muốn nhiều ghi Công cụ để thực kỹ thuật Masking phép toán Logic như: And,Or, Xor… PARALLEL...

Ngày tải lên: 29/06/2014, 15:20

... implementation requirements, etc External requirements • Requirements which arise from factors which are external to the system and its development process e.g interoperability requirements, legislative requirements, ...  Product requirements •  Organisational requirements •  Requirements which specify that the delivered product must behave in a particular way e.g execution speed, reliability, etc Requirements ... for writing requirements     Invent a standard format and use it for all requirements Use language in a consistent way Use shall for mandatory requirements, should for desirable requirements...

Ngày tải lên: 14/09/2012, 11:26

... User requirements specification Business requirements specification System requirements elicitation User requirements elicitation Feasibility study Prototyping Requirements elicitation Reviews Requirements ... processes • • • • Requirements elicitation; Requirements analysis; Requirements validation; Requirements management ©Ian Sommerville 2004 Software Engineering, 7th edition Chapter Slide The requirements ... Chapter Slide 10 The requirements spiral Requirements classification and organisation Requirements discovery ©Ian Sommerville 2004 Requirements prioritization and negotiation Requirements documentation...

Ngày tải lên: 14/09/2012, 11:26

... Do nhu cầu thực tế, Parallel Robot phát triển theo nhiều hớng khác nh: - Theo bậc tự Parallel Robot có 3, 4, bậc tự - Theo vận tốc dịch chuyển có loại ... tất loại Parallel Robot có u điểm nh: khả chịu tải cao, gia tốc lớn, độ cứng vững khí cao, khối lợng động thấp, tần số riêng cao, kết cấu đơn giản cấu chấp hành định vị Với u điểm trên, Parallel ... thực việc điều khiển cho Parallel Robot, cần có điều khiển cho đảm bảo đợc tính đồng thời, khả nhớ quản lý khâu động học độc lập đây, giới thiệu điều khiển dùng cho Parallel Robot có bậc tự (hình...

Ngày tải lên: 15/10/2012, 14:28