Instruction/ maintenance manual of the product Parallel Port Input/Output Converter PPIO B&B Electronics
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. PPIO2899 Manual Cover Page B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 Parallel Port Input/Output Converter Model PPIO Document No. PPIO2899 B&B Electronics Mfg. Co.
PPIO2899 Manual Table of Contents i B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 TABLE OF CONTENTS INTRODUCTION ..........................................................
PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 1 I NTRODUCTION The PPIO allows you to connect your IBM PC (or clone) computer to the outside world using the computer’s parallel port.
2 PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 Packing List Examine the shipping carton and contents for physical damage. If there is damage, contact B&B Electronics immediately.
PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 3 PC P ARALLEL P ORT D ESCRIPTION To understand how the PPIO can be controlled you must first understand how the parallel port works inside the computer.
4 PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 used to read the status of the port.
PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 5 Table 1 Note 1: X means no connection to any DB - 25 pin. Note 2: Bit 4 of 37AH as an outpu t is used to control the interrupt IRQ7.
6 PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 There are three port addresses that are normally used on a PC for parallel ports: 3BCH, 378H, and 278H.
PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 7 PPIO D ESCRIPTION & C ONNECTION The PPIO makes use of the eight output pins (pins 2 through 9) at address 378H to drive its eight outputs.
8 PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 Figure 1.
PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 9 C ONTROLLING THE PPIO U SING GWBASIC Refer to the fragment of G WBASIC code in F igure 2 to see how to input the bits and make one 8 - bit word.
10 PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 Table 2 The big advantage of using the ANDing and ORing as shown in Table 2 is that it makes each PPIO pin independent.
PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 11 When you input the 8 - bit word using lines 300 - 460 of Fi gure 2, note that you also get the status of the outputs.
12 PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 C ONTROLLING THE PPIO U SING P ASCAL The PPIO disk includes two source code files as an example of using the PPIO with the Pascal programming language.
PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 13 PROCEDURE Set_IRQ_Off; BEGIN PORT[Control_Address] := $04;{Write 4 to di sable IRQ} END; {Set_IRQ_Off} The function, In_Byte, returns the value of the variable, Input_Byte.
14 PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 The parallel port’s status register stores the upper nibble (four bi ts) of the input line status.
PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 15 Notice that in the binary representation of the mask value, line zero’s mask has bit number zero set, and line one’s mask has bit number one set, etc.
16 PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 As with the function, In_Byte, the mask value is calculated by shifting 00000001b right the same number of times as the desired line number.
PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 17 For example: Output_Byte = 01010101b Line_Number = 3 St.
18 PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 C ONTROLLING THE PPIO U SING C The PPIO disk includes three source code files as an example of using the PPIO with the C programming language.
PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 19 The function, Set_IRQ_OFF(), tells the parallel port not to generate any interrupts. This sh ould be called immediately after Set_Start().
20 PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 The parallel port’s status register stores the upper nibble (four bits) of the i nput line status.
PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 21 Notice that in the binary representation of the mask value, line zero’s mask has bit number ze ro set, and line one’s mask has bit number one set, etc.
22 PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 Line_Number = 3 Output_Byte = 10101010b 00000001b shift - right 3 (Line_Number) = 00001000b AND 10101010b (Output_Byte) 00001000b The function, Set_Output_Bit(), sets the selected output line ON of OFF.
PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 23 For example: Output_Byte = 01010101b Line_Number = 3 St.
24 PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 The function, Is_PPIO(), tests whether or not the PPIO is connected to the parallel port and fun ctioning properly.
PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 25 Input_Byte = inp( Control_Address ) & 0x0F; if( (In.
PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 27 I NTER FACING TO THE PPIO Each output of the PPIO is capable of handling currents as high a 500 mA when the output is low.
28 PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 Figure 4.
PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 29 E XAMPLE U SE OF THE PPIO Figure 5 shows a simple use of the PPIO to create an automatic Heating and Air Conditioning system.
30 PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 Heat and the Air. See line 230. If IB is equal to two then the 72 degree thermostat is on and the 78 degree one is off.
PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 31 90 REM IB IS THE INPUT BYTE AND OB IS THE OUTPUT BYTE 1.
PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 33 A PPENDIX Hexadecimal Numbers Hexadecim al numbers are base - 16 numbers.
34 PPIO2899 Manual B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815 - 433 - 5100 - Fax 815 - 433 - 5104 Table 4 Binary Numbers Binary numbers are base - 2 numbers. They are written as a sequence of one's and zero's and end with a lower or upper case "B".
An important point after buying a device B&B Electronics Parallel Port Input/Output Converter PPIO (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
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If you already are a holder of B&B Electronics Parallel Port Input/Output Converter PPIO, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime B&B Electronics Parallel Port Input/Output Converter PPIO.
However, one of the most important roles played by the user manual is to help in solving problems with B&B Electronics Parallel Port Input/Output Converter PPIO. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device B&B Electronics Parallel Port Input/Output Converter PPIO along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
