JPS6130286B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a data transmission terminal device equipped with a keyboard and a printer that can be connected to an external transmission line such as a communication line. For this type of device, it is desirable that the device itself be able to variably set transmission conditions. The transmission conditions here include transmission speed, parity format, and whether transmission and reception are simultaneous or alternative, that is, full-duplex or half-duplex transmission format. Conventionally, in order to set such transmission conditions, a setting switch corresponding to each transmission condition was provided, but later, in order to simplify the device, it was possible to set the transmission conditions by operating the character keys on the keyboard without providing the setting switch. A configurable device was proposed. The present invention provides a data transmission terminal device that allows transmission conditions to be set from a keyboard and that improves operability during the setting. The present invention will be explained in detail below with reference to Examples. FIG. 1 shows a data transmission terminal device according to an embodiment. Data input by key operations on the keyboard 1 is sent to the first microprocessor 2 and the first register 3.
and the printer 5 via the second microprocessor 4.
On the other hand, the signal is transmitted to the external output transmission line 7 via the first microprocessor 2 and the converter 6. The data input from external input transmission line 8 is
The data is transmitted to the printer 5 via the FIFO memory 9 and the second microprocessor 4. On the other hand, transmission condition data inputted by key operations on the keyboard 1 is set in the second register 10 via the first microprocessor 2, and the converter 6 is input/outputted under the transmission conditions set in the second register 10. Perform the action. The keyboard 1 includes multiple character keys such as numbers and alphabets, multiple function keys such as the space key and carriage return key, and one condition setting key that is operated prior to setting transmission conditions. It has an inherent normally open contact that closes when operated. The first microprocessor 2 assigns a unique address to each of the keys on the keyboard 1, and
The contacts of each key are sequentially scanned, and when a key contact in an operating state is reached, the first ROM 11, which is a read-only memory, is queried for the key contents corresponding to the key address. The first ROM 11 has a key code memory area, and a key code corresponding to the same address as the above address is stored in this area. Furthermore, such a key code conforms to, for example, a JIS 8-bit code. The first microprocessor 2 determines the key code answered from the first ROM 11, and if it belongs to the above-mentioned character key or function key, sends the key code to the first register 3 and the converter 6, and on the other hand, the above-mentioned transmission conditions If it belongs to the setting key, transmission condition setting processing is performed immediately. The first microprocessor 2 also performs transmission condition setting processing when power is turned on to one device. In this embodiment, the transmission conditions include three types: transmission speed, parity format, and transmission format, and four types of transmission speeds: 300 baud, 200 baud, 150 baud, and 110 baud, and parity formats of odd numbers, It is assumed that three types, even number and none, and two types of transmission format, full-duplex and half-duplex, have been determined. The second register 10 for setting transmission condition data has a capacity of at least 5 bits, the first and second bits of which correspond to the transmission speed, and the third and fourth bits of which correspond to the transmission speed.
The bit corresponds to the parity format, and the 5th bit corresponds to the transmission format, and the specific correspondence relationship is as follows.

[Table] and are assigned. That is, if the transmission conditions are set to, for example, 200 baud, odd parity, and full duplex, the first microprocessor 2
The second, third, fourth, and fifth bits of 0 are set to "1", and only the first bit is set to "0". The details of the transmission condition setting process by the first microprocessor 2 will be described later. The converter 6 transfers the data transmitted from the first microprocessor 2 to the external output transmission line 7, but since the data from the first microprocessor 2 is a parallel code, it is serialized in time, that is, in bits. Convert it to a serial code and send it out. On the other hand, the converter 6 converts the serial code input via the external input transmission line 8 into a parallel code and stores it in the FIFO memory 9.
send to. Such input/output operations in the converter 6 are carried out by the first to second registers 10 in which the transmission condition data is set.
This is done by referring to the contents of the fourth bit. In particular, the transmission speed is determined by the transmission clock frequency of the clock oscillator 15 which determines the conversion operation of the converter 6, and therefore the clock oscillator 15 decodes the contents of the first and second bits of the second register 10 to select its oscillation frequency. . Note that the fifth bit is referenced by the first microprocessor 2. As such a converter 6, an LSI manufactured by National Semiconductor, MM5303 is suitable. That is, in such a case, the output of the clock oscillator 15 is
It is input to the 17th pin and 40th pin of the LSI, and the second
The third and fourth bit outputs of the register 10 are input to the 39th and 35th pins of the LSI through inverters, respectively. The FIFO memory 9 can store a plurality of pieces of parallel code data coming from the converter 6 in the order of arrival, and can extract each piece of data in the order of arrival. The second microprocessor 4 determines the data read from the first register 3 or the FIFO memory 9, and instructs the printer 5 to print the character if the read data belongs to a character key on the keyboard 1. , and when it belongs to a function key, causes the corresponding function operation to be executed. The details of the processing operation of the second microprocessor 4 will be described later. In this embodiment, the printer 5 is of a serial printing type by moving the print head by digits, and the maximum number of digits that can be printed is 80 digits. The first ROM 11 and the second ROM 12 each have a program memory area, and the first and second microprocessors 2 and 4 perform all processing operations on the first and second microprocessors, respectively.
This is carried out according to the control program stored in the program memory areas of the second ROMs 11 and 12. At this time, the first microprocessor 2 sequentially memorizes the scan addresses when scanning the keys on the keyboard 1, and also determines whether uppercase or lowercase letters are currently valid on the keyboard 1, that is, the shift state. The first RAM 13, which is a random access memory, is also used to store data, and the second microprocessor 4 sequentially stores the number of digits that have been printed, and also stores other necessary control signals. A second RAM 14, which is also a random access memory, is also used for temporary storage. The first and second microprocessors 2 and 4 in this embodiment are preferably LSIs manufactured by National Semiconductor, ISP-8A/500D. The apparatus of this embodiment will be further explained below along with its operations, including the processing operations of the first and second microprocessors 2 and 4. 2 and 3 show the first and second control programs 15 and 16 stored in the first and second ROMs 11 and 12 for controlling the processing operations of the first and second microprocessors 2 and 4, respectively. Showing a flowchart. In the first control program 15, the program starts when the power is turned on, and after performing a predetermined initial clearing process such as clearing the first and second registers, the program enters step K0. At step K0, the first microprocessor 2
reads the contents from a specific memory area of the first ROM 11, that is, the preset pattern area, and transfers the read contents to the second register 10. The preset pattern area consists of 5 bits, the same as the bit capacity of the second register 10, and the first to fifth bits are the same as the bit capacity of the second register 10.
[11010] is stored in the bit, and in step K0, the contents of the first to fifth bits are written to the first to fifth bits of the second register 10, respectively. In other words, in such a case, the transmission conditions are 300 baud,
This means that even parity and half duplex are set. It is assumed that such transmission conditions are used most frequently. In the first control program 15, the program then moves to step K1, and if there is no input from the keyboard 1, the program stays at step K1. That is, in step K1, each key contact point is scanned as described above in order to detect the state of key operation on the keyboard 1. This scanning is performed by the program at step K1.
It will be repeated as long as it stays. The second control program 16 starts when the power is turned on, and cycles through steps P1, P3, and P4 if there is no change in the state of the device. In step P1, it is detected whether the paper feed switch provided in the printer 5 is operated or not.
If the printer has been operated, the process moves to step P2, where operation commands for returning the print head to the initial position, ie, carriage return, and line feed for the printing paper, ie, line feed, are transmitted to the printer 5. In step P3, it is detected whether data is stored in the FIFO memory 9 or not. If data is not stored, the process moves to step P4. In step P4, it is detected whether or not data is stored in the first register 3. If data is not stored, the process returns to step P1. Therefore, when the paper feed switch of the printer 5 is not operated and no data is stored in the FIFO memory 9 and the first register 3, that is, when no data is received from the outside and no keys are operated on the keyboard 1, The second control program 16 is P1, P3, P4
Each step will be cycled through. [1] When a character key or function key is operated on keyboard 1. At this time, the first control program 15 moves to step K2. In step K2, the code corresponding to the key being operated is read from the first ROM 11, and it is determined whether or not it is the transmission condition setting key. Since the transmission condition setting key is not currently pressed, the program moves to step K3. In step K3, the read data code is transmitted to the converter 6. The converter 6 transmits the input data to the outside as described above. At this time, if the transmission condition setting key has not been operated after the power is turned on to the device and before the above key operation, the converter 6 will operate under the transmission conditions set in step K10; If there is a setting key operation, after that operation, the second
The operation is performed under the transmission conditions set in the register 10. The first microprocessor 2 also refers to the contents of the fifth bit of the second register 10,
If it represents half-duplex, the input data code is transferred not only to the converter 6 but also to the first register 1. The program is step K3
After the execution is completed, the process returns to step K1. On the other hand, in the case of half-duplex, the second control program 16 performs the first
Since it is detected that data has entered the register 3, the process moves to step P9. At step P9, the data in the first register 3 is read into the second microprocessor 4, and the program then moves to step P10, where the read data is processed. In other words, when the data corresponds to a character key, the printing of the corresponding character in the printer 5 and subsequent digit advance operations of the print head are commanded; on the other hand, when the data corresponds to a function key, the printing of the corresponding character in the printer 5 is commanded. Action is commanded. After completing execution of step P10, the second control program 16 moves to step P11. Step P
In step 11, it is detected whether the current number of printed digits exceeds the maximum of 80 digits. If it does not, the process returns to step P1; if it does, the process returns to step P.
After step 12, the process returns to step P1. Step P1
In step 2, the carriage return and line feed operations in the printer 5 are commanded. [] When there is no key operation on the keyboard 1 and data is input from the outside via the converter 6. At this time, if the transmission condition setting key is not operated after the power is turned on to the device and before data is input from the outside, the converter 6 performs its input operation under the transmission conditions set in step K0, while the above-mentioned If the transmission condition setting key is operated, after the operation, the input operation is performed under the transmission conditions set in the second register 10 by the method described later. When data is input from the outside, the first control program 15 stays at step K1, and the second control program 16, which has been in the circulation process until then, detects that data has entered the FIFO memory 9 at step P3, so it moves to step P5. Move to. At step P5, the data in the FIFO memory 9 is read into the second microprocessor 4, and the program then moves to step P6, whereupon the same processing as the previously described steps P10, P11, and P12 is performed at steps P6, P7, and P8. Ru. If it is determined at step P7 that the number of digits to be printed does not exceed 80, and if the execution at step P8 is completed, the program then moves to step P4. [] When the transmission condition setting key is operated on keyboard 1. At this time, the first control program 15 moves to step K2. At step K2, the above-mentioned determination is made, and since the key currently being operated is the transmission condition setting key, the program moves to step K4. At step K4, the carriage return and line feed functions are sequentially read from the key code memory area of the first ROM 11, and are sequentially entered into the first register 3 as data. That is, first, the first microprocessor 2
1 Read the carriage return code from the ROM 11 and transfer it to the first register 3. Therefore, the second control program 16 detects that the carriage return code has entered the first register 3 at step P4 in the circulation process up to that point, so it moves to step P9. Thereafter, the program returns to step P1 via steps P9, P10, and P11 as described above, and in the process of step P10, a carriage return operation in the printer 5 is commanded. The first microprocessor 2 receives the completion report of the carriage return operation in the printer 5 from the second microprocessor 4, and then receives the report from the second microprocessor 4.
1 Read the line feed code from the ROM 11 and transfer it to the first register 3. Therefore, the second control program 16 similarly proceeds to steps P9 and P10, instructs the line feed operation in the printer 5 in step P10, and returns to step P1. The first microprocessor 2 receives the completion report of the line feed operation in the printer 5 from the second microprocessor 4, and moves the first control program 11 to step K5. At step K5, the character codes S, P, E, E, D, = are sequentially read out from the key code memory area of the first ROM 11, and are sequentially entered into the first register 3 as data. That is, first, the first microprocessor 2
1 Read the character code S from the ROM 11 and transfer it to the first register 3. Therefore, the second control program 16 detects that data has entered the first register 3 at step P4 in the circulation process up to that point, so it moves to step P9. Thereafter, the program returns to step P1 via steps P10 and P11, and in the process of step P10, the printer 5 is instructed to print the character S. Similarly, the characters P, E, E, D, and = are printed thereafter.
These printing conditions are as shown in Figure 4 on printing paper 1.
It appears in the first line of 7. The first control program 15 then proceeds to step K6.
Move to. At step K6, each key contact point is scanned to detect the state of key operation on the keyboard 1, similar to step K1. The operator of the apparatus sees "SPEED=" printed on the printing paper 17 and knows that it is time to input the transmission speed, and inputs the desired transmission speed using the numeric keys on the keyboard 1. When the first digit of the desired transmission rate is entered on the keyboard 1, the first control program 15 moves to step K7. In step K7, the code corresponding to the key being operated is read from the first ROM 11 and transferred to the first register 3. Therefore, the second control program 16 similarly executes steps P4, P9,
After passing through P10 and P11, the number is printed by the printer 5 in the process of step P10. After the printing is completed, the first control program 15 moves to step K8. At step K8, step K
It is determined whether the printing operation through steps K6 and K7 has been performed for three digits, and if the printing operation is less than three digits, the process returns to step K6. Note that this semi-determined standard of three digits is due to the fact that all predetermined transmission speeds are made up of three digit numbers. Therefore, when a number up to the third digit is input in the same manner, the first control program 15 moves from step K8 to step K9. In step K9, it is determined whether the input three-digit value is correct, that is, the four predetermined transmission speeds;
It is determined whether they match any one of 300, 200, 150, and 110, and if they do not match, the process moves to step K10. In step K10, the signal ? from the key code memory area of the first ROM 11? The code is read out and transferred to the first register 3. Therefore, the second control program 16 similarly executes steps P4, P9, P1.
0, P11, and in the process of step P10, the signal?
is printed on the printer 5. This printing condition is the 4th
It is shown in the first line of the printing paper 17 in the figure. After the execution in step K10 is completed, the program returns to step K4. Therefore, the carriage return and line feed are performed in the same manner at step K4.
"SPEED=" is printed at step K5, and desired numbers are input and printed at steps K6, K7, and K8. This printing state is shown in the second line of the printing paper 17 in FIG. If the above three-digit numerical value is determined to be correct at step K9, the program moves to step K11. In step K11, the input three-digit numerical value is set as the transmission speed condition in the second register 10 as described above. The first control program 15 then proceeds to step K1.
Move on to 2. At step K12, a carriage return and line feed are performed as in step K4, and the program then moves to step K13. Step K13 is similar to step K5, except that in this case "PARITY=" is printed, and the program then moves to step K14. The operator of the device should read the printed “PARITY=”
, and knows that it is the parity format input stage, and inputs the desired format using the character keys on the keyboard 1. In this case, the input characters are associated with "ODD" for odd parity, "EVE" for even parity, and "NON" for no parity. Therefore, step K1 of the first control program 15
4, K15, K16, steps K6, K
7 and K8, and three digit characters are printed. This printing state is shown in the third line of the printing paper 17 in FIG. In the following step K17, it is semi-determined whether the input characters are correct, that is, whether they match any of ODD, EVE, or NON. If they do not match, the process moves to step K18, where the same processing as step K10 is performed. After that, the program returns to step K12. If it is determined in step K17 that the input character is correct, the program returns to step K19. In step K19, the input three-digit character is set as a parity format condition in the second register 10 as described above. The first control program 15 then proceeds to step K2.
Move to 0. At step K20, a carriage return and line feed are performed as in step K4, and the program then moves to step K21.
Step K21 is similar to step K5, except that in this case "DUPLEX=" is printed and the program then moves to step K22. The equipment operator must read the printed “DUPLEX”
``='' and knows that it is time to input the transmission format, and inputs the desired format using the character keys on the keyboard 1. In this case, the input characters are associated with "FULL" for full duplex and "HALF" for half duplex, respectively. Therefore, step K of the first control program 15
22, K23, K24, steps K6, K
7, the same operation as K8 is performed. However, the number of digits determined in step K24 is 4 digits. This printing state is shown in the fourth line of the printing paper 17 in FIG. When the predetermined four-digit characters have been input, the program moves to step K25. In step K25, it is determined whether the input characters are correct, that is, whether they match either FULL or HALF. If they do not match, the process moves to step K26, where the same processing as step K10 is performed, and then the program continues. Return to step K20. If it is determined in step K25 that the input character is correct, the program moves to step K27. At step K27, the input four-digit characters are set in the second register 10 as transmission format conditions as described above. The first control program 15 then proceeds to step K1.
Return to Therefore, unless the transmission condition setting key is newly operated on keyboard 1, the second register 1 is already
Data transmission is performed under the transmission condition set to 0. In summary, the present invention provides a data transmission terminal device connected to an external transmission line, which comprises a keyboard, a printer, and allows the printer to print data input from the keyboard and/or the external transmission line, and from the keyboard. A control means for outputting input data to the external transmission line (in the above embodiment, all components involved in data transfer and control between the keyboard 1, printer 5, and external transmission lines 7 and 8, respectively) In a data transmission terminal device equipped with A rewritable variable storage unit that stores transmission conditions (in the above embodiment,
(corresponding to a second register 10), and controls transmission via the external transmission line based on the transmission conditions stored in the variable storage section, and the control means further controls the data input from the keyboard to match the transmission conditions. When the data is characterized as transmission line data by operating a predetermined key on the keyboard, the data is stored in the variable storage section, and when the device is powered on, the contents of the specific storage section are automatically stored in the variable storage section. This is a configuration that allows you to memorize it. Therefore, according to the present invention, in a data transmission terminal device equipped with a keyboard and a printer, transmission conditions can be set using keys on the keyboard without providing a dedicated setting switch for setting transmission conditions. However, since the keys are used for multiple purposes, the key operations become complicated.
In the present invention, specific transmission conditions are automatically set when the device is powered on, so if you set these specific transmission conditions as the ones that are used most often, you can set special transmission conditions when using the device. There is no need to set the transmission conditions by key operation on the keyboard every time the power is turned on to the device, unless the conditions are met, and automatic setting of the transmission conditions is done regardless of the previous transmission condition setting state of the device. Therefore, when the device is used under special transmission conditions, there is no need to perform key operations to switch the transmission conditions to the most frequent one for future use when the device is used. The method of operating the device is very simple. In this embodiment, if the first ROM 11 is made programmable, the contents of the automatic setting conditions can be determined as convenient for the user of the apparatus.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram of an embodiment of the present invention, FIGS. 2 and 3 are flowcharts, and FIG. 4 is a diagram showing an output printing state. 1... Keyboard, 2, 4... First and second microprocessors, 5... Printer.

Claims (1)

[Scope of Claims] 1. A data transmission terminal device connected to an external transmission line, comprising: a keyboard; specific storage means for storing specific transmission conditions; variable storage means for storing arbitrary transmission conditions; a first setting means for setting the contents of the specific storage means in the variable storage means when the device is powered on; and a first setting means for setting the contents of the specific storage means in the variable storage means, and determining whether or not a transmission condition setting key is operated for characterizing data input from the keyboard as a transmission condition. a determining means for determining, and when the determining means determines that there is a key operation of the transmission condition setting key, data input from the keyboard following the key operation is stored in the variable storage means as a transmission condition; a second setting means for setting; a transmission control means for controlling data transmission via the external transmission line based on the contents of the variable storage means;
A data transmission terminal device comprising: