parallel slave port read waveforms

... ;‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐    #define  READ   PORTE,0    #define  WRITE  PORTE,1    #define  CS    PORTE,2      #define  READBUTTON  PORTA,0    #define  WRITEBUTTON  PORTA,1  ;‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐  ... ;‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐  #define  READ   PORTE,0  #define  WRITE  PORTE,1  #define  CS    PORTE,2    #define  LEDPORT  PORTB  ;========================================================================== ... 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 ...

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 ... PORTE FUNCTIONS Name Bit# Buffer Type Function RE0/RD/AN5 bit0 ST/TTL(1) Input/output port pin or read control input in parallel slave port mode or analog input: RD = Not a read operation = Read ... data ready in output queue ;* OUTDATA - Output data queue ;* PIR1 - Interrupt flag register ;* TRISE - Parallel slave port flag register ;* PORTD - Input data from slave port ;* ;* Outputs: ;* PORTD...

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 ... requested port To read a port, you specify a port register and where to store the data read, and instruct the CPU to read the data into the requested location You can use direct port reads and ... 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 ... See Bi-directional Ports for more detail Interfacing the Standard Parallel Port Page Interfacing the Standard Parallel Port Base + Status Port http://www.senet.com.au/~cpeacock Read Only Bit Bit ... 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

... requested port To read a port, you specify a port register and where to store the data read, and instruct the CPU to read the data into the requested location You can use direct port reads and ... watermark Accessing Ports Accessing Ports Windows, DOS, and Visual Basic provide several ways to read and write to parallel ports The most direct way is reading and writing to the port registers Most ... 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...

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 ... hardware and software support Some of the newer parallel- port controllers support the shortened cycles CPU Speed Because all applications more than just read and write to ports, the CPU (microprocessor)...

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 ... Write to Status port bit '2 Write to Status port, bit '3 Read the Status port again Dim StatusPortAddress% StatusPortAddress = BaseAddress + ReadEppTimeoutBit = BitRead(StatusPortRead(BaseAddress),...

Ngày tải lên: 24/12/2013, 19:15

... Data port Dim DataPortData As Integer DataPortData = DataPortRead(BaseAddress) BitToggle DataPortData, Index DataPortWrite BaseAddress, DataPortData ReadPorts (BaseAddress) End Sub Sub cmdReadAll ... the Control port Dim ControlPortData As Integer ControlPortData = ControlPortRead(BaseAddress) BitToggle ControlPortData, Index ControlPortWrite BaseAddress, ControlPortData ReadPorts (BaseAddress) ... 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

... connectors without problems For example, if you're using the parallel port' s inputs to read manual switches and using the outputs to Parallel Port Complete 11 Please purchase PDF Split-Merge on www.verypdf.com ... 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...

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

... `The Control port selects a bit number to read `The Status port holds the data to be read For BitNumber = To ControlPortWrite BaseAddress, BitNumber DataIn(BitNumber) = StatusPortRead(BaseAddress) ... `Latch the data ControlPortWrite BaseAddress, Clock ControlPortWrite BaseAddress, `Read the nibbles at bits 4-7 LowNibble = StatusPortRead(BaseAddress) \ &H10 ControlPortWrite BaseAddress, SelectHighNibble ... Start DataPortWrite BaseAddress, ChannelNumber `Wait for EOC Do DoEvents LowNibble = StatusPortRead(BaseAddress) EOC = BitRead(LowNibble, 6) Loop Until EOC = `Read the byte in nibbles DataPortWrite...

Ngày tải lên: 24/12/2013, 19:15

... Clock ControlPortWrite BaseAddress, `Read the nibbles at bits 4-7 LowNibble = StatusPortRead(BaseAddress) \ &H10 ControlPortWrite BaseAddress, SelectHighNibble HighNibble = StatusPortRead(BaseAddress) ... = StatusPortRead(BaseAddress) EOC = BitRead(LowNibble, 6) Loop Until EOC = `Read the byte in nibbles DataPortWrite BaseAddress, ChannelNumber + HighNibbleSelect HighNibble = StatusPortRead(BaseAddress) ... clock Parallel Port Complete 157 Chapter Dim DataIn~(0 To 7) Dim DataByte~(0 To 4) Sub cmdReadBytes Click () Dim BitNumber~ `The Control port selects a bit number to read `The Status port holds...

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

... the main idea and major supporting ideas c the main idea, major supporting ideas, and minor supporting details d minor supporting details only PRE-TEST Before you read, you should: a Do nothing ... athlete and a sports fan: the athlete actively participates in the sport while the fan remains on the sidelines A good reader is always actively engaged in the reading task Frustrated readers, on ... minutes to “stretch” before they read Here are three pre-reading strategies that will dramatically improve your chances of reading success: breaking up the reading task reading the pre-text skimming...

Ngày tải lên: 05/10/2012, 09:48

... 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

... and virtually everyone knows the importance of vaccination, for themselves but especially for their children Here were already two things people might want to read about We were given the assignment ... no one would want to read anything about the company, I and my colleagues (it was a brainstorming) asked ourselves: What things does this company that people might want to read about? Its basic ... attractive to potential readers However, it didn’t stop there If all this exciting information were jumbled together with company propaganda, people probably still wouldn't want to read the brochure,...

Ngày tải lên: 18/10/2012, 14:47