CN104332125B - Nixie tube panel and key control circuit and control method thereof - Google Patents
Nixie tube panel and key control circuit and control method thereof Download PDFInfo
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- CN104332125B CN104332125B CN201410642917.1A CN201410642917A CN104332125B CN 104332125 B CN104332125 B CN 104332125B CN 201410642917 A CN201410642917 A CN 201410642917A CN 104332125 B CN104332125 B CN 104332125B
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Abstract
The invention discloses a nixie tube panel and key control circuit and a control method thereof. The nixie tube panel and key control circuit comprises a 74CH138 chip, a 74HC164 chip, a current-limiting resistor, a five-bit common-cathode nixie tube, a function indication LED, functional touch keys and a data communication port, wherein the 74HC164 chip is connected with the current-limiting resistor, the 74HC138 chip is connected with the five-bit common-cathode nixie tube, the public end of the function indication LED and the functional touch keys, and the current-limiting resistor is connected with the segment code of the five-bit common-cathode nixie tube and the function indication LED; the control circuit is featured with more reasonable pin resource distribution and more compact module component position. By means of the control method, the key press and display scanning can be performed without delay, and the CPU use ratio is higher.
Description
Technical field
The present invention relates to a kind of panel and key control circuit, more specifically, more particularly to a kind of digital tube face plate and
Key control circuit；The invention further relates to the control method of the control circuit.
Background technology
Conventional digital tube face plate and key control circuit more options are by 74HC138 and 74HC164 chips respectively as keyboard
Signal input and signal output to digital tube face plate driving chip, and traditional 74HC138,74HC164 chip and number
The connection circuit mode constituted by tube face plate and button, needs to wait time delay when scanning in button and display circuit, shared
Microcontroller pin it is more, sweep time is longer, particularly high speed processor, low so as to there is cpu busy percentage, pin resource
Not enough and module extends the difficult shortcoming of lead.Therefore, provided that the utilization rate of CPU, discharges pin resource and make module
The position of part is compacter to become digital tube face plate and key control circuit problem demanding prompt solution.
The content of the invention
The previous purpose of the present invention is to provide a kind of digital tube face plate and key control circuit, and the control circuit has draws
Foot resource allocation more reasonable, the overall compact feature in position of modular unit.
Another object of the present invention is to provide the control method of above-mentioned digital tube face plate and key control circuit, utilizing should
Control method is planted, without waiting for time delay, the utilization rate of CPU is higher for button and display scanning.
The previous technical scheme of the present invention is as follows：
A kind of digital tube face plate and key control circuit, including 74HC138 chips, 74HC164 chips, current-limiting resistance, five
Position common cathode charactron, function indication LED, function touch key and data connector, wherein, the data cube computation mouth with
The common port of 74HC138 chips, 74HC164 chips and function touch key is connected, and the 74HC164 chips are electric with current limliting
Resistance is connected, and the 74HC138 chips are connected with five common cathode charactrons, the common port of function indication LED, function touch key
Connect, the current-limiting resistance is connected with the segment encode and function indication LED of five common cathode charactrons.
Further, described data cube computation mouth is the double pricking with needle of 10 pins, and described function touch key includes that function is light
Touch of key-press K1, function touch key K2, function touch key K3, function touch key K4, function touch key K5, function are touched
Button K6, function touch key K7, function touch key K8；5 feet of the described double pricking with needle of 10 pins and the 8 of 74HC164 chips
Foot is connected, and described 7 feet of the double pricking with needle of 10 pins are connected with 1,2 feet of 74HC164 chips, the described double pricking with needle of 10 pins
9 feet and function touch key K1, function touch key K2, function touch key K3, function touch key K4, function touch by
Key K5, function touch key K6, function touch key K7, one end of function touch key K8 are connected, 10 described pin double-rows
6 feet of pin are connected with 1 foot of 74HC138 chips, and described 8 feet of the double pricking with needle of 10 pins are connected with 2 feet of 74HC138 chips
Connect, described 10 feet of the double pricking with needle of 10 pins are connected with 3 feet of 74HC138 chips.
Further, the current-limiting resistance includes 4 exclusion R1 and 4 exclusion R2；3 feet and 4 exclusions of the 74HC164 chips
8 feet of R1 are connected, and 4 feet of 74HC164 chips are connected with 7 feet of 4 exclusion R1,5 feet of 74HC164 chips and 4 exclusion R1
6 feet be connected, 6 feet of 74HC164 chips are connected with 5 feet of 4 exclusion R1,10 feet of 74HC164 chips and 4 exclusion R2's
8 feet are connected, and 11 feet of 74HC164 chips are connected with 7 feet of 4 exclusion R2, and the 6 of 12 feet of 74HC164 chips and 4 exclusion R2
Foot is connected, and 13 feet of 74HC164 chips are connected with 5 feet of 4 exclusion R2.
Further, the function indication LED include light emitting diode L1, light emitting diode L2, light emitting diode L3, send out
Optical diode L4, light emitting diode L5, light emitting diode L6, light emitting diode L7, light emitting diode L8, five common cathode numbers
Code pipe includes 1 common cathode charactron and 4 one common cathode charactrons；The segment encode phase of the current-limiting resistance and five common cathode charactrons
It is connected as 7 feet of 1 foot and 1 common cathode charactron of 4 exclusion R1,11 feet of 4 one common cathode charactrons, light emitting diode L1
Anode is connected, 6 feet of 2 feet and 1 common cathode charactron of 4 exclusion R1,7 feet of 4 one common cathode charactrons, light emitting diode
The anode of L2 is connected, 4 feet of 3 feet and 1 common cathode charactron of 4 exclusion R1,4 feet of 4 one common cathode charactrons, luminous two
The anode of pole pipe L3 is connected, and 2 feet of 4 feet and 1 common cathode charactron of 4 exclusion R1,2 feet of 4 one common cathode charactrons, sends out
The anode of optical diode L4 is connected, 1 foot of 1 foot and 1 common cathode charactron of 4 exclusion R2, the 1 of 4 one common cathode charactrons
Foot, the anode of light emitting diode L5 are connected, and 9 feet of 2 feet and 1 common cathode charactron of 4 exclusion R2,4 one common cathodes are digital
10 feet of pipe, the anode of light emitting diode L6 are connected, and 10 feet of 3 feet and 1 common cathode charactron of 4 exclusion R2,4 one are altogether
5 feet of cloudy charactron, the anode of light emitting diode L7 are connected, 5 feet of 4 feet and 1 common cathode charactron of 4 exclusion R2,4
3 feet of body common cathode charactron, the anode of light emitting diode L8 are connected.
Further, 15 feet of the 74HC138 chips are connected with 3,8 feet of 1 common cathode charactron, 74HC138 cores
14 feet of piece are connected with 12 feet of 4 one common cathode charactrons, and the 9 of 13 feet of 74HC138 chips and 4 one common cathode charactrons
Foot connects, and 12 feet of 74HC138 chips are connected with 8 feet of 4 one common cathode charactrons, 11 feet of 74HC138 chips and 4 one
The 6 feet connection of body common cathode charactron, 10 feet and light emitting diode L1, light emitting diode L2, the light emitting diode of 74HC138 chips
L3, light emitting diode L4, light emitting diode L5, light emitting diode L6, light emitting diode L7, each negative electrode of light emitting diode L8
It is connected.
The latter technique scheme of the present invention is as follows：
The control method of a kind of digital tube face plate and key control circuit, comprising the following steps is carried out：
A () sets Interruption parameter in mastery routine, initialize Key=0, n=0.
B () enters Interruption, CPU reads key-press status.If n-th button is pressed when interrupting, key assignments is preserved
Key=n+1；If n-th button is not pressed when interrupting, skip.
C whether () judges n equal to 7, if then performing next step；Otherwise, n=n+1, jumps to (f) step.
D () judges whether the Key of this wheel is equal with last round of KeyPre values, if equal, Key is effective key assignments,
Key assignments process is carried out, otherwise button is skipped for interference signal.
E () preserves current key assignments and uses KeyPre=Key to interrupting next time, n resets.
F () selects the aobvious of 74HC138 chip pins, control five common cathode charactrons of closing and function indication LED is not used
Show.
G () CPU sends next n-th LED segment code to be shown or function indication signal gives 74HC164 chips,
74HC164 chips give five common cathode charactrons or function indication LED signal again.
H () CPU control 74HC138 chips select n-th for showing.
(i) end interrupt.
J () is interrupted from (b) step next time and is continued executing with.
Further, in step (a), the general break period is set to 5ms.
Compared with prior art, the device have the advantages that being：
1. a kind of digital tube face plate and key control circuit of the present invention, the control circuit effectively reduce CPU connection keyboards
With the pin number of display control circuit, make the position of pin resource allocation more reasonable, modular unit compacter.
2. a kind of digital tube face plate and the control method of key control circuit of the present invention, by CPU scan control electricity one by one
Whether the 5 common cathode charactrons, function indication LED and 8 function touch keys in road are pressed, and often interruption completes 1 wheel for 8 times and shows
Show and keyboard scan, if this wheel scan has a signal that button is pressed, then judge with front 1 wheel key scan to push button signalling carry out
Relatively, the interference of signal can be accurately removed, CPU needs to show the content of setting according to user, using the digital tube face plate and is pressed
Key control circuit combination controlling method, eliminate the wait delay time of numeral method and keyboard scan, make the computing of CPU
It is in hgher efficiency.
Description of the drawings
Fig. 1 is the circuit diagram of the present invention；
Fig. 2 is the control flow schematic diagram of the present invention.
Specific embodiment
With reference to specific embodiment, technical scheme is described in further detail, but do not constitute it is right
Any restriction of the present invention.
Refering to shown in Fig. 1, a kind of digital tube face plate and key control circuit of the present invention, including 74HC138 chips 1,
74HC164 chips 2, current-limiting resistance 3, five common cathode charactrons 4, function indication LED 5, function touch key 6 and data connectors
7, wherein, the common port phase of the data cube computation mouth 7 and 74HC138 chips 1,74HC164 chips 2 and function touch key 6
Connection, the 74HC164 chips 2 are connected with current-limiting resistance 3, the 74HC138 chips 1 and five common cathode charactrons 4, function
The common port of indication LED 5, function touch key 6 are connected, the segment encode and work(of the current-limiting resistance 3 and five common cathode charactrons 4
Energy indication LED 5 is connected.The control circuit effectively reduces the pin number of CPU connection keyboards and display control circuit, makes pin
The position of resource allocation more reasonable, modular unit is compacter.
Described data cube computation mouth 7 is the double pricking with needle of 10 pins, and described function touch key 6 includes function touch key
K1, function touch key K2, function touch key K3, function touch key K4, function touch key K5, function touch key
K6, function touch key K7, function touch key K8；5 feet of the described double pricking with needle of 10 pins and 8 foot phases of 74HC164 chips 2
Connection, described 7 feet of the double pricking with needle of 10 pins are connected with 1,2 feet of 74HC164 chips 2, and the 9 of the described double pricking with needle of 10 pins
Foot and function touch key K1, function touch key K2, function touch key K3, function touch key K4, function touch key
K5, function touch key K6, function touch key K7, one end of function touch key K8 are connected, the described double pricking with needle of 10 pins
6 feet be connected with 1 foot of 74HC138 chips 1, described 8 feet of the double pricking with needle of 10 pins are connected with 2 feet of 74HC138 chips 1
Connect, described 10 feet of the double pricking with needle of 10 pins are connected with 3 feet of 74HC138 chips 1.
The current-limiting resistance 3 includes 4 exclusion R1 and 4 exclusion R2；8 feet of 3 feet of the 74HC164 chips 2 and 4 exclusion R1
It is connected, 4 feet of 74HC164 chips 2 are connected with 7 feet of 4 exclusion R1,6 feet of 5 feet of 74HC164 chips 2 and 4 exclusion R1
It is connected, 6 feet of 74HC164 chips 2 are connected with 5 feet of 4 exclusion R1,8 feet of 10 feet of 74HC164 chips 2 and 4 exclusion R2
It is connected, 11 feet of 74HC164 chips 2 are connected with 7 feet of 4 exclusion R2, the 6 of 12 feet of 74HC164 chips 2 and 4 exclusion R2
Foot is connected, and 13 feet of 74HC164 chips 2 are connected with 5 feet of 4 exclusion R2.
The function indication LED 5 includes light emitting diode L1, light emitting diode L2, light emitting diode L3, light emitting diode
L4, light emitting diode L5, light emitting diode L6, light emitting diode L7, light emitting diode L8, five common cathode charactrons 4 are wrapped
Include 1 common cathode charactron and 4 one common cathode charactrons；The current-limiting resistance 3 is connected with the segment encode of five common cathode charactrons 4
For 7 feet of 1 foot and 1 common cathode charactron of 4 exclusion R1,11 feet of 4 one common cathode charactrons, light emitting diode L1 anode
It is connected, 6 feet of 2 feet and 1 common cathode charactron of 4 exclusion R1,7 feet of 4 one common cathode charactrons, light emitting diode L2
Anode is connected, 4 feet of 3 feet and 1 common cathode charactron of 4 exclusion R1,4 feet of 4 one common cathode charactrons, light emitting diode
The anode of L3 is connected, 2 feet of 4 feet and 1 common cathode charactron of 4 exclusion R1,2 feet of 4 one common cathode charactrons, luminous two
The anode of pole pipe L4 is connected, and 1 foot of 1 foot and 1 common cathode charactron of 4 exclusion R2,1 foot of 4 one common cathode charactrons, sends out
The anode of optical diode L5 is connected, 9 feet of 2 feet and 1 common cathode charactron of 4 exclusion R2, the 10 of 4 one common cathode charactrons
Foot, the anode of light emitting diode L6 are connected, and 10 feet of 3 feet and 1 common cathode charactron of 4 exclusion R2,4 one common cathodes are digital
5 feet of pipe, the anode of light emitting diode L7 are connected, 5 feet of 4 feet and 1 common cathode charactron of 4 exclusion R2,4 one common cathodes
3 feet of charactron, the anode of light emitting diode L8 are connected.
15 feet of the 74HC138 chips 1 are connected with 3,8 feet of 1 common cathode charactron, 14 feet of 74HC138 chips 1
It is connected with 12 feet of 4 one common cathode charactrons, 13 feet of 74HC138 chips 1 are connected with 9 feet of 4 one common cathode charactrons,
12 feet of 74HC138 chips 1 are connected with 8 feet of 4 one common cathode charactrons, and 11 feet of 74HC138 chips 1 and 4 one are altogether
The 6 feet connection of cloudy charactron, 10 feet of 74HC138 chips 1 and light emitting diode L1, light emitting diode L2, light emitting diode L3,
Light emitting diode L4, light emitting diode L5, light emitting diode L6, light emitting diode L7, each negative electrode phase of light emitting diode L8
Connection.
Refering to shown in Fig. 2, the control method of a kind of digital tube face plate and key control circuit, comprising the following steps is carried out：
A () sets Interruption parameter in mastery routine, the general break period is set to 5ms, and this time interval makes CPU's
Utilization rate is more reasonable, initializes Key=0, n=0.
B () enters Interruption, CPU reads key-press status.If n-th button is pressed when interrupting, 10 pins are double
9 feet of pricking with needle are low level, preserve key value Key=n+1；If n-th button is not pressed when interrupting, skip.
C whether () judges n equal to 7, if then performing next step；Otherwise, n=n+1, jumps to (f) step.
D () judges whether the Key of this wheel is equal with last round of KeyPre values, if equal, Key is effective key assignments,
Key assignments process is carried out, otherwise button is skipped for interference signal.
E () preserves current key assignments and uses KeyPre=Key to interrupting next time, n resets.
F () selects 1 pin of 74HC138 chips, control five common cathode charactrons 4 of closing and function indication LED 5 is not used
Show.
G () CPU sends next n-th LED segment code to be shown or function indication signal to 74HC164 chips 2,
74HC164 chips 2 give five common cathode charactrons 4 or function indication LED 5 signal again.
H () CPU control 74HC138 chips 1 select n-th for showing.
(i) end interrupt.
J () is interrupted from (b) step next time and is continued executing with.
By 5 common cathode charactrons 4 in CPU one by one scan control circuit, function indication LED 5 and 8 function touch keys
Whether button 6 is pressed, and often interruption completes 1 wheel 8 times and shows and keyboard scan, if this wheel scan has the signal that button is pressed, then
Judge with front 1 wheel key scan to push button signalling be compared, can accurately remove the interference of signal；CPU is according to user's needs
The content of setting is shown, using the digital tube face plate and key control circuit and combination controlling method, numeral method is eliminated
With the wait delay time of keyboard scan, make the operation efficiency of CPU higher.The usage amount of CPU pins, section are effectively reduced simultaneously
Part pin resource is saved.
It is in the better embodiment that the foregoing is only the present invention, all to be made in the range of the spirit and principles in the present invention
Any modification, equivalent and improvement etc., should be included within the scope of the present invention.
Claims (6)
1. the control method of a kind of digital tube face plate and key control circuit, described digital tube face plate and key control circuit bag
Include 74HC138 chips (1), 74HC164 chips (2), current-limiting resistance (3), five common cathode charactrons (4), function indication LED (5),
Function touch key (6) and data connector (7), it is characterised in that the data cube computation mouth (7) and 74HC138 chips (1),
The common port of 74HC164 chips (2) and function touch key (6) is connected, the 74HC164 chips (2) and current-limiting resistance
(3) it is connected, the 74HC138 chips (1) are light with five common cathode charactrons (4), the common port of function indication LED (5), function
Touch of key-press (6) is connected, and the current-limiting resistance (3) is connected with the segment encode and function indication LED (5) of five common cathode charactrons (4)
Connect；
Described control method is comprised the following steps to be carried out：
A () sets Interruption parameter in mastery routine, initialize Key=0, n=0；
B () enters Interruption, CPU reads key-press status；If n-th button is pressed when interrupting, preservation key value Key=
n+1；If n-th button is not pressed when interrupting, skip；
C whether () judges n equal to 7, if then performing next step；Otherwise, n=n+1, jumps to (f) step；
D () judges whether the Key of this wheel is equal with last round of KeyPre values, if equal, Key is effective key assignments, is carried out
Key assignments process, otherwise button is skipped for interference signal；
E () preserves current key assignments and uses KeyPre=Key to interrupting next time, n resets；
F () selects 74HC138 chip (1) pins are not used, five common cathode charactrons (4) and function indication LED (5) are closed in control
Display；
G () CPU sends next n-th LED segment code to be shown or function indication signal gives 74HC164 chips (2),
74HC164 chips (2) give five common cathode charactrons (4) or function indication LED (5) signal again；
H () CPU controls 74HC138 chips (1) selects n-th for showing；
(i) end interrupt；
J () is interrupted from (b) step next time and is continued executing with.
2. the control method of a kind of digital tube face plate according to claim 1 and key control circuit, it is characterised in that institute
The data cube computation mouth (7) stated is the double pricking with needle of 10 pins, and described function touch key (6) is including function touch key K1, function
Touch key K2, function touch key K3, function touch key K4, function touch key K5, function touch key K6, function are light
Touch of key-press K7, function touch key K8；5 feet of the described double pricking with needle of 10 pins are connected with 8 feet of 74HC164 chips (2), institute
7 feet of the double pricking with needle of 10 pins stated are connected with 1,2 feet of 74HC164 chips (2), 9 feet of the described double pricking with needle of 10 pins with
Function touch key K1, function touch key K2, function touch key K3, function touch key K4, function touch key K5, work(
Can touch key K6, function touch key K7, one end of function touch key K8 be connected, 6 feet of the described double pricking with needle of 10 pins
It is connected with 1 foot of 74HC138 chips (1), 8 feet of the described double pricking with needle of 10 pins are connected with 2 feet of 74HC138 chips (1)
Connect, 10 feet of the described double pricking with needle of 10 pins are connected with 3 feet of 74HC138 chips (1).
3. the control method of a kind of digital tube face plate according to claim 1 and key control circuit, it is characterised in that institute
Current-limiting resistance (3) is stated including 4 exclusion R1 and 4 exclusion R2；3 feet of the 74HC164 chips (2) are connected with 8 feet of 4 exclusion R1
Connect, 4 feet of 74HC164 chips (2) are connected with 7 feet of 4 exclusion R1,6 feet of 5 feet of 74HC164 chips (2) and 4 exclusion R1
It is connected, 6 feet of 74HC164 chips (2) are connected with 5 feet of 4 exclusion R1,10 feet of 74HC164 chips (2) and 4 exclusion R2
8 feet be connected, 11 feet of 74HC164 chips (2) are connected with 7 feet of 4 exclusion R2,12 feet and 4 of 74HC164 chips (2)
6 feet of exclusion R2 are connected, and 13 feet of 74HC164 chips (2) are connected with 5 feet of 4 exclusion R2.
4. the control method of a kind of digital tube face plate according to claim 3 and key control circuit, it is characterised in that institute
Function indication LED (5) is stated including light emitting diode L1, light emitting diode L2, light emitting diode L3, light emitting diode L4, luminous
Diode L5, light emitting diode L6, light emitting diode L7, light emitting diode L8, five common cathode charactrons (4) are including 1
Common cathode charactron and 4 one common cathode charactrons；The current-limiting resistance (3) is connected with the segment encode of five common cathode charactrons (4)
For 7 feet of 1 foot and 1 common cathode charactron of 4 exclusion R1,11 feet of 4 one common cathode charactrons, light emitting diode L1 anode
It is connected, 6 feet of 2 feet and 1 common cathode charactron of 4 exclusion R1,7 feet of 4 one common cathode charactrons, light emitting diode L2
Anode is connected, 4 feet of 3 feet and 1 common cathode charactron of 4 exclusion R1,4 feet of 4 one common cathode charactrons, light emitting diode
The anode of L3 is connected, 2 feet of 4 feet and 1 common cathode charactron of 4 exclusion R1,2 feet of 4 one common cathode charactrons, luminous two
The anode of pole pipe L4 is connected, and 1 foot of 1 foot and 1 common cathode charactron of 4 exclusion R2,1 foot of 4 one common cathode charactrons, sends out
The anode of optical diode L5 is connected, 9 feet of 2 feet and 1 common cathode charactron of 4 exclusion R2, the 10 of 4 one common cathode charactrons
Foot, the anode of light emitting diode L6 are connected, and 10 feet of 3 feet and 1 common cathode charactron of 4 exclusion R2,4 one common cathodes are digital
5 feet of pipe, the anode of light emitting diode L7 are connected, 5 feet of 4 feet and 1 common cathode charactron of 4 exclusion R2,4 one common cathodes
3 feet of charactron, the anode of light emitting diode L8 are connected.
5. the control method of a kind of digital tube face plate according to claim 4 and key control circuit, it is characterised in that institute
State 15 feet of 74HC138 chips (1) to be connected with 3,8 feet of 1 common cathode charactron, 14 feet of 74HC138 chips (1) and 4
The 12 feet connection of one common cathode charactron, 13 feet of 74HC138 chips (1) are connected with 9 feet of 4 one common cathode charactrons,
12 feet of 74HC138 chips (1) are connected with 8 feet of 4 one common cathode charactrons, 11 feet of 74HC138 chips (1) and 4 one
The 6 feet connection of body common cathode charactron, 10 feet of 74HC138 chips (1) and light emitting diode L1, light emitting diode L2, luminous two
Pole pipe L3, light emitting diode L4, light emitting diode L5, light emitting diode L6, light emitting diode L7, light emitting diode L8 each
Negative electrode is connected.
6. the control method of a kind of digital tube face plate according to claim 1 and key control circuit, it is characterised in that step
Suddenly, in (a), the general break period is set to 5ms.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410642917.1A CN104332125B (en) | 2014-11-13 | 2014-11-13 | Nixie tube panel and key control circuit and control method thereof |
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| CN201410642917.1A CN104332125B (en) | 2014-11-13 | 2014-11-13 | Nixie tube panel and key control circuit and control method thereof |
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| CN104332125B true CN104332125B (en) | 2017-04-12 |
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|---|---|---|---|---|
| CN107369403B (en) * | 2017-09-07 | 2020-09-25 | 广东美的暖通设备有限公司 | Key display method and nixie tube |
| CN110148370A (en) * | 2019-05-23 | 2019-08-20 | 福建船政交通职业学院 | A kind of novel scanning circuit |
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| CN104332125A (en) | 2015-02-04 |
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