CN102945599A - Self-adaptive multi-system infrared decoding method, module and control circuit applying module - Google Patents
Self-adaptive multi-system infrared decoding method, module and control circuit applying module Download PDFInfo
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Abstract
The invention relates to a technology for automatically identifying various coding systems of an infrared remote control receiving decoder, in particular to a self-adaptive multi-system infrared decoding method, a module and a control circuit applying the module. The infrared remote control code words of different systems are automatically identified and decoded by detecting the time difference of adjacent infrared remote control pulse edges. A principle for automatically judging different infrared (IR) systems is realized through the different guidance code length of various infrared remote control code words; and the principle of judging code values is realized based on the different expression methods of the infrared remote control code values. A method for measuring the time difference between all the adjacent edges of pulse is as follows: first the edge information is converted into edge pulse and then the time difference between two pulses is measured. According to the self-adaptive multi-system infrared decoding method, the module and the control circuit applying module, the infrared remote control code words of different systems are automatically identified and decoded through the same infrared remote control receiver, so as to provide convenience for various application occasions.
Description
Technical field
The present invention relates to the automatic identification Multi-encoding standard technology of infrared remote control Rcv decoder, particularly a kind of self-adaptation the multi-system infrared decoding method, module and with the control circuit of this module.
Background technology
Infrared remote control is used widely in fields such as household electrical appliance, but present standard is a lot, there is the independently standard of oneself in large company, cause the product between the different businessmans can not be general, affect for the popularization of electronic product, also brought very large inconvenience for consumers in general.For this situation, if there is a general infrared remote control Rcv decoder to can be applicable to various applied environments; Or a general infrared remote control receipt decoding IP kernel is arranged, and can be integrated in all kinds of chips, then the popularization of chip product is with convenient.
What infrared remote-controlled signal standard commonly used adopted pulse position coding (PPM code) has NEC, JVC, 9012, C5D6, an AEHA etc., adopts the SIRC standard that Sony Corporation is arranged of pulsewidth coding (PWM code); Adopt the RC-5 that Philip is arranged of Manchester coding (reversal phase coding mode) and the NRC17 standard of Nokia company, the expression mode of various standard signals is all different, and processing mode is also different:
The PPM code can be returned into a type with the PWM code and be processed, and the difference between the various code systems is that mainly preamble code represents that the width high-low level width different, presentation logic 0/1 of mode high-low level are different, and the figure place of coding is different.Shown in Fig. 1 a and Fig. 1 b, preamble code is the low level that the high level of a 9mS adds a 4.5mS such as the expression mode of NEC standard signal; Logical zero is comprised of the high level of 0.56ms and the low level of 0.560ms; Logical one is comprised of the high level of 0.56ms and the low level of 1.68ms; One frame information comprises that preamble code, systematic code, user code, numeric data code, numeric data code radix-minus-one complement form, totally 32 of codings; And be the low level that the high level of a 2.4mS adds a 0.6mS with Sony Corporation's Infrared remote controller code word preamble code of PWM code; Logical zero is comprised of the high level of 0.6ms and the low level of 0.6ms; Logical one is comprised of the high level of 1.2ms and the low level of 0.6ms; One frame information comprises that preamble code, command code, address code form, totally 12 of codings;
The expression mode of the RC-5 standard of Manchester coding is shown in Fig. 2 a and Fig. 2 b, and each width of its code system all is 1.8mS, and logical zero is comprised of the high level of 0.9ms and the low level of 0.9ms; Logical one is comprised of the low level of 0.9ms and the high level of 0.9ms; One frame information comprises that start bit S, position F, control bit C, 5 systematic codes, 6 order of the bit codes form totally 14 of codings.
Summary of the invention
The purpose of this invention is to provide a kind of solution with the same infrared remote control receiver different systems infrared remote control code word of automatically identifying, decode.
The present invention adopts following scheme to realize: a kind of self-adaptation the multi-system infrared decoding method, it is characterized in that: by measuring infrared remote control pulse IRin adjacent edge along the mistiming Th between rising edge pulse signal IRup and the negative edge pulse signal IRdown, the mistiming Tl between negative edge pulse signal IRdown and the rising edge pulse signal IRup; Then can be according to value and IRup and the standard of IRdown signal determining Infrared remote controller code word and the value of each information bit of this Th and Tl.
In an embodiment of the present invention, to the following condition of judgment basis of Infrared remote controller code word standard:
1), when equaling greatly 9mS-900uS and the little 9mS+900uS of equaling, Tl and equal greatly 4.5ms-450uS and the little 4.5mS+450uS of equaling such as Th, then IR is the NEC standard;
2), when equaling greatly 4.5ms-450uS and the little 4.5mS+450uS of equaling, Tl and equal greatly 4.5ms-450uS and the little 4.5mS+450uS of equaling such as Th, then IR is 9012 standards;
3), when equaling greatly 3.376ms-340uS and the little 3.376mS+340uS of equaling, Tl and equal greatly 3.376ms-340uS and the little 3.376mS+340uS of equaling such as Th, then IR is the C5D6 standard;
4), when equaling greatly 6.752ms-670uS and the little 6.752mS+670uS of equaling, Tl and equal greatly 3.376ms-340uS and the little 3.376mS+340uS of equaling such as Th, then IR is the AEHA standard;
5), when equaling greatly 2.4ms-240uS and the little 2.4mS+240uS of equaling, Tl and equal greatly 0.600ms-60uS and the little 0.600mS+60uS of equaling such as Th, then IR is the SIRC standard of Sony company;
6), when equaling greatly 8.4ms-840uS and the little 8.4mS+840uS of equaling, Tl and equal greatly 4.200ms-420uS and the little 4.200mS+420uS of equaling such as Th, then IR is the standard of JVC company;
7), when equaling greatly 900uS-90uS and the little 900uS+90uS of equaling, Tl and equal greatly 900uS-90uS and the little 900uS+90uS of equaling such as Th, then IR is the RC-5 standard of the Manchester coding of Philip;
8), when equaling greatly 500uS-50uS and the little 500uS+50uS of equaling, Tl and equal greatly 2500uS-250uS and the little 2500uS+250uS of equaling such as Th, then IR is the NRC17 standard of the Manchester coding of Nokia;
9), all be discontented with the upper condition that is enough to such as Th, Tl, then received code word or the wrong code word that to identify.
In an embodiment of the present invention, in the decision process to information bit, as when having occurred Th or Tl greater than 3mS, then the position receiving course is overtime, and DRP data reception process is made mistakes, and should withdraw from whole receiving course, and makes Th=0, Tl=0, remeasures.
Another object of the present invention is for realizing that said method provides a kind of self-adaptation the multi-system infrared decoding module.
This module adopts following scheme to realize: a kind of self-adaptation the multi-system infrared decoding module, and it is characterized in that: this module comprises synchronizer, timer, decision device and register;
Described synchronizer carries out synchronously with the infrared remote-controlled signal IRin signal of inner work clock to the outside input, and generates rising edge pulse signal IRup and the negative edge pulse signal IRdown of IRin;
Described timer detects IRup and the IRdown signal that described synchronizer produces, and measures the mistiming Th between IRup and the IRdown, the mistiming Tl between IRdown and the IRup;
Described decision device is that the IRup that produces of the Th, the Tl that produce according to described timer and described synchronizer, the beginning that the IRdown signal judges whether a frame, the standard of IR signal, the position information of receiving are 1 or are 0;
The whole frame information of IR that described register is received in order to storage supplies to read.
In an embodiment of the present invention, described decision device is to the following condition of judgment basis of infrared remote control code word standard:
When 1), equaling greatly 9mS-900uS and the little 9mS+900uS of equaling, Tl and equal greatly 4.5ms-450uS and the little 4.5mS+450uS of equaling such as Th, then IR is the NEC standard, makes high level pulse width Ts0h=560uS, low level pulse width Ts0l=560uS, the high level pulse width Ts1h=560uS of logical one of logical zero, the low level pulse width Ts1l=1690uS of logical one, error amount △ T=56uS, frame length counter CN=32, the PPM code mark Fppm=1 that the time allows of logical zero in the described register;
When 2), equaling greatly 4.5ms-450uS and the little 4.5mS+450uS of equaling, Tl and equal greatly 4.5ms-450uS and the little 4.5mS+450uS of equaling such as Th, then IR is 9012 standards, makes Ts0h=560uS, Ts0l=560uS in the described register, Ts1h=560uS, Ts1l=1690uS, △ T=56uS, CN=32, Fppm=1;
When 3), equaling greatly 3.376ms-340uS and the little 3.376mS+340uS of equaling, Tl and equal greatly 3.376ms-340uS and the little 3.376mS+340uS of equaling such as Th, then IR is the C5D6 standard, makes Ts0h=844uS, Ts0l=844uS in the described register, Ts1h=844uS, Ts1l=2532uS, △ T=84uS, CN=22, Fppm=1;
When 4), equaling greatly 6.752ms-670uS and the little 6.752mS+670uS of equaling, Tl and equal greatly 3.376ms-340uS and the little 3.376mS+340uS of equaling such as Th, then IR is the AEHA standard, makes Ts0h=422uS, Ts0l=422uS in the described register, Ts1h=422uS, Ts1l=1266uS, △ T=42uS, CN=48, Fppm=1;
When 5), equaling greatly 2.4ms-240uS and the little 2.4mS+240uS of equaling, Tl and equal greatly 0.600ms-60uS and the little 0.600mS+60uS of equaling such as Th, then IR is the SIRC standard of Sony company, makes Ts0h=600uS, Ts0l=600uS in the described register, Ts1h=1200uS, Ts1l=600uS, △ T=60uS, CN=16, Fppm=1;
When 6), equaling greatly 8.4ms-840uS and the little 8.4mS+840uS of equaling, Tl and equal greatly 4.200ms-420uS and the little 4.200mS+420uS of equaling such as Th, then IR is the standard of JVC company, makes Ts0h=525uS, Ts0l=525uS in the described register, Ts1h=525uS, Ts1l=1575uS, △ T=52uS, CN=12, Fppm=1;
When 7), equaling greatly 900uS-90uS and the little 900uS+90uS of equaling, Tl and equal greatly 900uS-90uS and the little 900uS+90uS of equaling such as Th, then IR is the RC-5 standard of the Manchester coding of Philip, makes Ts0h=1800uS, Ts0l=1800uS in the described register, Ts1h=900uS, Ts1l=900uS, CN=12, △ T=90uS, Fppm=0;
When 8), equaling greatly 500uS-50uS and the little 500uS+50uS of equaling, Tl and equal greatly 2500uS-250uS and the little 2500uS+250uS of equaling such as Th, then IR is the NRC17 standard of the Manchester coding of Nokia, makes Ts0h=1000uS, Ts0l=1000uS in the described register, Ts1h=500uS, Ts1l=500uS, △ T=50uS, CN=17, Fppm=0; But it should be noted that the code word of receiving is the radix-minus-one complement of NRC17 code word.
9), all be discontented with the upper condition that is enough to such as Th, Tl, then received code word or the wrong code word that to identify, should withdraw from the receiving course of frame information, and make Th=0, Tl=0, remeasured.
In an embodiment of the present invention, the deterministic process of described decision device contraposition information is as follows:
When 1), IRup is effective:
1., such as Fppm=1, then equal greatly Ts0h-△ T such as Th and the little Ts0h+ of equaling △ T, Tl equal greatly Ts0l-△ T and the little Ts0l+ of equaling △ T, the position information of then receiving is 0, makes Brec=0, Th=0, Tl=0; Equal greatly Ts1h-△ T and the little Ts1h+ of equaling △ T, Tl equal greatly Ts1l-△ T and the little Ts1l+ of equaling △ T such as Th, the position information of then receiving is 1, makes Brec=1, Th=0, Tl=0; Otherwise received invalid information, should withdraw from whole receiving course, and made Th=0, Tl=0, remeasured;
2., such as Fppm=0, then equal greatly Ts0l-△ T such as Tl and the little Ts0l+ of equaling △ T, Th equal 0, the position information of then receiving is 1, makes Brec=1, Th=0, Tl=0; Equal greatly Ts1h-△ T and the little Ts1h+ of equaling △ T, Tl equal greatly Ts1l-△ T and the little Ts1l+ of equaling △ T such as Th, the position information of then receiving is 1, makes Brec=1, Th=0, Tl=0; Equal greatly Ts1l-△ T and the little Ts1l+ of equaling △ T, Th equal 0 such as Tl, also half the information just of then receiving continues to wait for the arrival at next edge; Otherwise received invalid information, should withdraw from whole receiving course, and made Th=0, Tl=0, remeasured;
When 2), IRdown is effective:
1., such as Fppm=0, then equal greatly Ts0h-△ T such as Th and the little Ts0h+ of equaling △ T, Tl equal 0, the position information of then receiving is 0, makes Brec=0, Th=0, Tl=0; Equal greatly Ts1h-△ T and the little Ts1h+ of equaling △ T, Tl equal greatly Ts1l-△ T and the little Ts1l+ of equaling △ T such as Th, the position information of then receiving is 0, makes Brec=0, Th=0, Tl=0; Equal greatly Ts1h-△ T and the little Ts1h+ of equaling △ T, Tl equal 0 such as Th, also half the information just of then receiving continues to wait for the arrival at next edge; Otherwise received invalid information, should withdraw from whole receiving course, and made Th=0, Tl=0, remeasured;
2., such as Fppm=1, also half the information just of then receiving continues to wait for the arrival at next edge.
A further object of the present invention provides a kind of control circuit of using above-mentioned self-adaptation the multi-system infrared decoding module.
It adopts following scheme to realize: this control circuit is characterised in that: comprise described self-adaptation the multi-system infrared remote control decoding module, interface module, LED reading scan driver module, keyboard scan and debounce dynamic model piece and built-in RC oscillator and electrification reset module; Described built-in RC oscillator links to each other with debounce dynamic model piece, infrared remote control receipt decoding module with described interface module, LED reading scan driver module, keyboard scan with the electrification reset module; Described interface module links to each other with microprocessor to external application interface bus I2C or SPI, internally links to each other with debounce dynamic model piece, infrared remote control receipt decoding module with described LED reading scan driver module, keyboard scan; Described LED reading scan driver module is the turntable driving light-emitting diode display directly, and provides scanning impulse for described external connection keyboard; Described keyboard scan and debounce dynamic model piece receive the status information of external connection keyboard, and when having key to press, finish shake removal function and key recognition function, to the key of the pressing rear run-out key information of encoding.
In an embodiment of the present invention, this control circuit is to be integrated on the integrated chip.
The last purpose of the present invention is a kind of control circuit of using above-mentioned self-adaptation the multi-system infrared remote control decoding module.
This control circuit is characterised in that: comprise interface module, power management module, built-in RC oscillator and electrification reset module and described infrared remote control receipt decoding module; Described built-in RC oscillator is connected with described interface module, power management module, infrared remote control receipt decoding module with the electrification reset module; Described interface module links to each other with microprocessor to external application interface bus I2C or SPI, internally is connected with described power management module, infrared remote control receipt decoding module; Described infrared remote control receipt decoding module receives the signal IRin of infrared remote control Receiver output, and its code value of receiving send described power management module, and described power management module output signal PWRon is used for the switch of control power supply.
In an embodiment of the present invention, this control circuit is to be integrated on the integrated chip.
The present invention has the benefit of the following aspects:
1, self-adaptation is identified multiple infrared remote control standard, wide application, easy to use, flexible.
2, hardware decoding when the most systems of having avoided determining at present adopts software decode, takies the too many matter of time of CPU, has reduced the workload of CPU.
3, self-adaptation is identified multiple infrared remote control standard, simplifies the programing work amount of electronic product man-machine interface.
4, make chip after, the fault-tolerant ability of chip is strong, and the technique of chip is had no special requirements, and is applicable in the polytechnic chip.
Description of drawings
Fig. 1 a and Fig. 1 b are that the form of NEC infrared remote control code system one frame data and the expression mode of logical zero/1 concern schematic diagram.
Fig. 2 a and Fig. 2 b are that the form of RC-5 infrared remote control code system one frame data and the expression mode of logical zero/1 concern schematic diagram.
Fig. 3 is that self-adaptation the multi-system infrared decoding modular structure of the present invention concerns schematic diagram.
Fig. 4 is the workflow schematic diagram of self-adaptation the multi-system infrared decoding module of the present invention.
Fig. 5 is the example schematic that the infrared decoding module is combined with keyboard display module.
Fig. 6 is the example schematic that the infrared decoding module is combined with power management module.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples.
The present invention is by detecting the mistiming on infrared remote control pulsion phase adjacent side edge, realizing automatically identifying, decoding different systems infrared remote control code word.The principle of automatic discrimination different I R standard is that the preamble code length difference of the various Infrared remote controller code words of foundation realizes; The principle of judging every code value realizes according to various Infrared remote controller code value method for expressing differences.Each adjacent edge of ranging pulse along between the method for mistiming be first side information to be converted into the edge pulse, measure again that two mistimings between the pulse realize.Can automatically identify the Infrared remote controller signal of 8 kinds of different systems such as NRC17 standard of the RC-5 standard of Philip company of NEC, 9012, C5D6, AEHA, JVC, the SIRC of Sony company standard and Manchester coding of PPM coding and Nokia company with the infrared remote control Rcv decoder of the present invention design.
Concrete, method of the present invention is by measuring infrared remote control pulse IRin adjacent edge along the mistiming Th between rising edge pulse signal IRup and the negative edge pulse signal IRdown, the mistiming Tl between negative edge pulse signal IRdown and the rising edge pulse signal IRup; Then judge the standard of Infrared remote controller code word according to the value of this Th and Tl.Described decision device is to the following condition of judgment basis of Infrared remote controller code word standard:
1), when equaling greatly 9mS-900uS and the little 9mS+900uS of equaling, Tl and equal greatly 4.5ms-450uS and the little 4.5mS+450uS of equaling such as Th, then IR is the NEC standard;
2), when equaling greatly 4.5ms-450uS and the little 4.5mS+450uS of equaling, Tl and equal greatly 4.5ms-450uS and the little 4.5mS+450uS of equaling such as Th, then IR is 9012 standards;
3), when equaling greatly 3.376ms-340uS and the little 3.376mS+340uS of equaling, Tl and equal greatly 3.376ms-340uS and the little 3.376mS+340uS of equaling such as Th, then IR is the C5D6 standard;
4), when equaling greatly 6.752ms-670uS and the little 6.752mS+670uS of equaling, Tl and equal greatly 3.376ms-340uS and the little 3.376mS+340uS of equaling such as Th, then IR is the AEHA standard;
5), when equaling greatly 2.4ms-240uS and the little 2.4mS+240uS of equaling, Tl and equal greatly 0.600ms-60uS and the little 0.600mS+60uS of equaling such as Th, then IR is the SIRC standard of Sony company;
6), when equaling greatly 8.4ms-840uS and the little 8.4mS+840uS of equaling, Tl and equal greatly 4.200ms-420uS and the little 4.200mS+420uS of equaling such as Th, then IR is the standard of JVC company;
7), when equaling greatly 900uS-90uS and the little 900uS+90uS of equaling, Tl and equal greatly 900uS-90uS and the little 900uS+90uS of equaling such as Th, then IR is the RC-5 standard of the Manchester coding of Philip;
8), when equaling greatly 500uS-50uS and the little 500uS+50uS of equaling, Tl and equal greatly 2500uS-250uS and the little 2500uS+250uS of equaling such as Th, then IR is the NRC17 standard of the Manchester coding of Nokia;
9), all be discontented with the upper condition that is enough to such as Th, Tl, then received code word or the wrong code word that to identify.
In an embodiment of the present invention, in the decision process of described decision device to Infrared remote controller codeword information position, if any Th or Tl during greater than 3mS, then the position receiving course is overtime, and DRP data reception process is made mistakes, and should withdraw from whole receiving course, and make Th=0, Tl=0, remeasure.
Please refer to Fig. 3, Fig. 3 is that self-adaptation the multi-system infrared decoding modular structure concerns schematic diagram; This self-adaptation the multi-system infrared decoding module is comprised of 4 parts such as synchronizer, timer, decision device and registers, the infrared remote-controlled signal IRin of outside input is connected with described synchronizer, described synchronizer is connected with described timer, decision device, described timer is connected with described decision device, described decision device is connected with described register, and the system works clock signal clk is connected with described synchronizer, timer, decision device, register with reset signal RST.
Described synchronizer carries out synchronously with the IRin signal of inner work clock to input, and generates rising edge pulse signal IRup and the negative edge pulse signal IRdown of IRin.
The IRup that described timer produces described synchronizer the IRdown signal detect, measure the mistiming Th(high level pulse width between IRup and the IRdown), the mistiming Tl(low level pulse width between IRdown and the IRup).
Described decision device is that the IRup that produces of the Th, the Tl that produce according to described timer and described synchronizer, the beginning that the IRdown signal judges whether a frame, the standard of IR signal, the position information of receiving are 1 or are 0.Described decision device principle of work schematic diagram as shown in Figure 4, process prescription is as follows:
Be low level when A, IRin no signal, so when IRup was effective when rising edge appearred in IRin, clear Th, Tl started the receiving course of a frame information, and begin timing.
B, judge the standard of Infrared remote controller code word according to the value of Th and Tl, and determine each correlation parameter, process is as follows:
When 1), equaling greatly 9mS-900uS and the little 9mS+900uS of equaling, Tl and equal greatly 4.5ms-450uS and the little 4.5mS+450uS of equaling such as Th, then IR is the NEC standard, makes high level pulse width Ts0h=560uS, low level pulse width Ts0l=560uS, the high level pulse width Ts1h=560uS of logical one of logical zero, the low level pulse width Ts1l=1690uS of logical one, error amount △ T=56uS, frame length counter CN=32, the PPM code mark Fppm=1 that the time allows of logical zero in the described register;
When 2), equaling greatly 4.5ms-450uS and the little 4.5mS+450uS of equaling, Tl and equal greatly 4.5ms-450uS and the little 4.5mS+450uS of equaling such as Th, then IR is 9012 standards, makes Ts0h=560uS, Ts0l=560uS, Ts1h=560uS, Ts1l=1690uS, △ T=56uS, CN=32, Fppm=1;
When 3), equaling greatly 3.376ms-340uS and the little 3.376mS+340uS of equaling, Tl and equal greatly 3.376ms-340uS and the little 3.376mS+340uS of equaling such as Th, then IR is the C5D6 standard, makes Ts0h=844uS, Ts0l=844uS, Ts1h=844uS, Ts1l=2532uS, △ T=84uS, CN=22, Fppm=1;
When 4), equaling greatly 6.752ms-670uS and the little 6.752mS+670uS of equaling, Tl and equal greatly 3.376ms-340uS and the little 3.376mS+340uS of equaling such as Th, then IR is the AEHA standard, makes Ts0h=422uS, Ts0l=422uS, Ts1h=422uS, Ts1l=1266uS, △ T=42uS, CN=48, Fppm=1;
When 5), equaling greatly 2.4ms-240uS and the little 2.4mS+240uS of equaling, Tl and equal greatly 0.600ms-60uS and the little 0.600mS+60uS of equaling such as Th, then IR is the SIRC standard of Sony company, makes Ts0h=600uS, Ts0l=600uS, Ts1h=1200uS, Ts1l=600uS, △ T=60uS, CN=16, Fppm=1;
When 6), equaling greatly 8.4ms-840uS and the little 8.4mS+840uS of equaling, Tl and equal greatly 4.200ms-420uS and the little 4.200mS+420uS of equaling such as Th, then IR is the standard of JVC company, makes Ts0h=525uS, Ts0l=525uS, Ts1h=525uS, Ts1l=1575uS, △ T=52uS, CN=12, Fppm=1;
When 7), equaling greatly 900uS-90uS and the little 900uS+90uS of equaling, Tl and equal greatly 900uS-90uS and the little 900uS+90uS of equaling such as Th, then IR is the RC-5 standard of the Manchester coding of Philip, makes Ts0h=1800uS, Ts0l=1800uS, Ts1h=900uS, Ts1l=900uS, CN=12, △ T=90uS, Fppm=0;
When 8), equaling greatly 500uS-50uS and the little 500uS+50uS of equaling, Tl and equal greatly 2500uS-250uS and the little 2500uS+250uS of equaling such as Th, then IR is the NRC17 standard of the Manchester coding of Nokia, makes Ts0h=1000uS, Ts0l=1000uS, Ts1h=500uS, Ts1l=500uS, △ T=50uS, CN=17, Fppm=0; But it should be noted that the code word of receiving is the radix-minus-one complement of NRC17 code word.
9), all be discontented with the upper condition that is enough to such as Th, Tl, then receive code word or the wrong code word that to identify, should withdraw from the receiving course of frame information, and make Th=0, Tl=0, turned back to steps A.
In the deterministic process of C, position information, during greater than 3mS, then the position receiving course is overtime if any Th or Tl, and DRP data reception process is made mistakes, and should withdraw from whole receiving course, and makes Th=0, Tl=0, turns back to steps A.The deterministic process of position information is as follows:
When 1), IRup is effective:
1., such as Fppm=1, then equal greatly Ts0h-△ T such as Th and the little Ts0h+ of equaling △ T, Tl equal greatly Ts0l-△ T and the little Ts0l+ of equaling △ T, the information of then receiving is 0, makes Brec=0, Th=0, Tl=0; Equal greatly Ts1h-△ T and the little Ts1h+ of equaling △ T, Tl equal greatly Ts1l-△ T and the little Ts1l+ of equaling △ T such as Th, the information of then receiving is 1, makes Brec=1, Th=0, Tl=0; Otherwise received invalid information, should withdraw from whole receiving course, and made Th=0, Tl=0, turned back to steps A.
2., such as Fppm=0, then equal greatly Ts0l-△ T such as Tl and the little Ts0l+ of equaling △ T, Th equal 0, the information of then receiving is 1, makes Brec=1, Th=0, Tl=0; Equal greatly Ts1h-△ T and the little Ts1h+ of equaling △ T, Tl equal greatly Ts1l-△ T and the little Ts1l+ of equaling △ T such as Th, the information of then receiving is 1, makes Brec=1, Th=0, Tl=0; Equal greatly Ts1l-△ T and the little Ts1l+ of equaling △ T, Th equal 0 such as Tl, also half the information just of then receiving turns back to the arrival that step C waits for next edge; Otherwise received invalid information, should withdraw from whole receiving course, and made Th=0, Tl=0, turned back to steps A.
When 2), IRdown is effective:
1., such as Fppm=0, then equal greatly Ts0h-△ T such as Th and the little Ts0h+ of equaling △ T, Tl equal 0, the information of then receiving is 0, makes Brec=0, Th=0, Tl=0; Equal greatly Ts1h-△ T and the little Ts1h+ of equaling △ T, Tl equal greatly Ts1l-△ T and the little Ts1l+ of equaling △ T such as Th, the information of then receiving is 0, makes Brec=0, Th=0, Tl=0; Equal greatly Ts1h-△ T and the little Ts1h+ of equaling △ T, Tl equal 0 such as Th, also half the information just of then receiving turns back to the arrival that step C waits for next edge; Otherwise received invalid information, should withdraw from whole receiving course, and made Th=0, Tl=0, turned back to steps A.
2., such as Fppm=1, also half the information just of then receiving turns back to the arrival that step C waits for next edge.
D, the position information Brec that will receive do displacement and preserve, and CN is subtracted 1, and such as CN=0, then the frame information of IR finishes receiving, and the information that receives in the shift register is written in the described register, and described INT is put 1; Be not equal to 0 such as CN, then turn back to step C, continue above receiving course.
Here be noted that the time that all are used in this patent all is that the umber of pulse that is converted into the system works clock realizes when circuit is realized.
In addition, as shown in Figure 5, the schematic block circuit diagram that Fig. 5 is an infrared decoding module with the LED driver module/the keyboard scan module combines, this circuit also can be integrated on the integrated chip, form a personal-machine interface control integrated circuit (IC) chip, this chip can adopt I2C or SPI interface and microcontroller in succession.Described man-machine interface control integration circuit chip comprises interface module, LED reading scan driver module, keyboard scan and debounce dynamic model piece, built-in RC oscillator and electrification reset module, infrared remote control receipt decoding module.Described infrared remote control receipt decoding module is the module by the present invention's design.Described built-in RC oscillator and electrification reset module and described interface module, LED reading scan driver module, keyboard scan and debounce dynamic model piece, infrared remote control receipt decoding module links to each other, described interface module links to each other with microprocessor to external application interface bus I2C or SPI, internally with described LED reading scan driver module, keyboard scan and debounce dynamic model piece, infrared remote control receipt decoding module links to each other, described LED reading scan driver module is the turntable driving light-emitting diode display directly, and provide scanning impulse for keyboard, described keyboard scan and debounce dynamic model piece receive the status information of keyboard, and when having key to press, finish shake removal function and key recognition function, to the key of the pressing rear run-out key information of encoding.
Described man-machine interface control integration circuit chip can provide LED display driver, keyboard scan, the button debounce is moving, the infrared remote control standard is identified automatically, infrared remote control receipt decoding function, microcontroller can or read push button signalling or infrared remote control information by I2C or SPI interface writing display information, and the interface function of man-machine interface is provided for microcontroller.
As shown in Figure 6, Fig. 6 is that the infrared decoding module is combined the standby power managing chip that forms with power management module, can realize infrared remote control start, order shut-off function, and available I2C or SPI interface are connected with microprocessor.Described standby power managing chip comprises interface module, power management module, built-in RC oscillator and electrification reset module, infrared remote control receipt decoding module.Described built-in RC oscillator is connected with described interface module, power management module, infrared remote control receipt decoding module with the electrification reset module, described interface module links to each other with microprocessor to external application interface bus I2C or SPI, internally be connected with described power management module, infrared remote control receipt decoding module, described infrared remote control receipt decoding module receives the signal IRin of infrared remote control Receiver output, its code value of receiving send described power management module, and described power management module output signal PWRon can be used for controlling the switch of power supply.
Described standby power managing chip can be realized the power management of electronic product holding state, realizes the real low-power consumption standby of electronic product.Infrared remote controller key code value can be write by microprocessor by interface bus, can be suitable in the Infrared remote controller product of multiple types, and is flexible and convenient to use.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to the present patent application claim change and modify, and all should belong to covering scope of the present invention.
Claims (10)
1. self-adaptation the multi-system infrared decoding method, it is characterized in that: by measuring infrared remote control pulse IRin adjacent edge along the mistiming Th between rising edge pulse signal IRup and the negative edge pulse signal IRdown, the mistiming Tl between negative edge pulse signal IRdown and the rising edge pulse signal IRup; Then according to value and IRup and the standard of IRdown signal determining Infrared remote controller code word and the value of each information bit of this Th and Tl.
2. self-adaptation the multi-system infrared decoding method according to claim 1 is characterized in that: the standard process of judging the Infrared remote controller code word is according to following condition:
1), when equaling greatly 9mS-900uS and the little 9mS+900uS of equaling, Tl and equal greatly 4.5ms-450uS and the little 4.5mS+450uS of equaling such as Th, then IR is the NEC standard;
2), when equaling greatly 4.5ms-450uS and the little 4.5mS+450uS of equaling, Tl and equal greatly 4.5ms-450uS and the little 4.5mS+450uS of equaling such as Th, then IR is 9012 standards;
3), when equaling greatly 3.376ms-340uS and the little 3.376mS+340uS of equaling, Tl and equal greatly 3.376ms-340uS and the little 3.376mS+340uS of equaling such as Th, then IR is the C5D6 standard;
4), when equaling greatly 6.752ms-670uS and the little 6.752mS+670uS of equaling, Tl and equal greatly 3.376ms-340uS and the little 3.376mS+340uS of equaling such as Th, then IR is the AEHA standard;
5), when equaling greatly 2.4ms-240uS and the little 2.4mS+240uS of equaling, Tl and equal greatly 0.600ms-60uS and the little 0.600mS+60uS of equaling such as Th, then IR is the SIRC standard of Sony company;
6), when equaling greatly 8.4ms-840uS and the little 8.4mS+840uS of equaling, Tl and equal greatly 4.200ms-420uS and the little 4.200mS+420uS of equaling such as Th, then IR is the standard of JVC company;
7), when equaling greatly 900uS-90uS and the little 900uS+90uS of equaling, Tl and equal greatly 900uS-90uS and the little 900uS+90uS of equaling such as Th, then IR is the RC-5 standard of the Manchester coding of Philip;
8), when equaling greatly 500uS-50uS and the little 500uS+50uS of equaling, Tl and equal greatly 2500uS-250uS and the little 2500uS+250uS of equaling such as Th, then IR is the NRC17 standard of the Manchester coding of Nokia;
9), all be discontented with the upper condition that is enough to such as Th, Tl, then received code word or the wrong code word that to identify.
3. self-adaptation the multi-system infrared decoding method according to claim 1, it is characterized in that: in the decision process to information bit, as when having occurred Th or Tl greater than 3mS, then the position receiving course is overtime, DRP data reception process is made mistakes, the receiving course of these frame data be should withdraw from, and Th=0, Tl=0 made.
4. self-adaptation the multi-system infrared decoding module, it is characterized in that: this module comprises synchronizer, timer, decision device and register;
Described synchronizer carries out synchronously with the infrared remote-controlled signal IRin signal of inner work clock to the outside input, and generates rising edge pulse signal IRup and the negative edge pulse signal IRdown of IRin;
Described timer detects IRup and the IRdown signal that described synchronizer produces, and measures the mistiming Th between IRup and the IRdown, the mistiming Tl between IRdown and the IRup;
Described decision device is that the IRup that produces of the Th, the Tl that produce according to described timer and described synchronizer, the beginning that the IRdown signal judges whether a frame, the standard of IR signal, the position information of receiving are 1 or are 0;
The whole frame information of IR that described register is received in order to storage supplies to read.
5. self-adaptation the multi-system infrared decoding module according to claim 4 is characterized in that: described decision device to the decision process of Infrared remote controller code word standard according to following condition:
When 1), equaling greatly 9mS-900uS and the little 9mS+900uS of equaling, Tl and equal greatly 4.5ms-450uS and the little 4.5mS+450uS of equaling such as Th, then IR is the NEC standard, makes high level pulse width Ts0h=560uS, low level pulse width Ts0l=560uS, the high level pulse width Ts1h=560uS of logical one of logical zero, the low level pulse width Ts1l=1690uS of logical one, error amount △ T=56uS, frame length counter CN=32, the PPM code mark Fppm=1 that the time allows of logical zero in the described register;
When 2), equaling greatly 4.5ms-450uS and the little 4.5mS+450uS of equaling, Tl and equal greatly 4.5ms-450uS and the little 4.5mS+450uS of equaling such as Th, then IR is 9012 standards, makes Ts0h=560uS, Ts0l=560uS in the described register, Ts1h=560uS, Ts1l=1690uS, △ T=56uS, CN=32, Fppm=1;
When 3), equaling greatly 3.376ms-340uS and the little 3.376mS+340uS of equaling, Tl and equal greatly 3.376ms-340uS and the little 3.376mS+340uS of equaling such as Th, then IR is the C5D6 standard, makes Ts0h=844uS, Ts0l=844uS in the described register, Ts1h=844uS, Ts1l=2532uS, △ T=84uS, CN=22, Fppm=1;
When 4), equaling greatly 6.752ms-670uS and the little 6.752mS+670uS of equaling, Tl and equal greatly 3.376ms-340uS and the little 3.376mS+340uS of equaling such as Th, then IR is the AEHA standard, makes Ts0h=422uS, Ts0l=422uS in the described register, Ts1h=422uS, Ts1l=1266uS, △ T=42uS, CN=48, Fppm=1;
When 5), equaling greatly 2.4ms-240uS and the little 2.4mS+240uS of equaling, Tl and equal greatly 0.600ms-60uS and the little 0.600mS+60uS of equaling such as Th, then IR is the SIRC standard of Sony company, makes Ts0h=600uS, Ts0l=600uS in the described register, Ts1h=1200uS, Ts1l=600uS, △ T=60uS, CN=16, Fppm=1;
When 6), equaling greatly 8.4ms-840uS and the little 8.4mS+840uS of equaling, Tl and equal greatly 4.200ms-420uS and the little 4.200mS+420uS of equaling such as Th, then IR is the standard of JVC company, makes Ts0h=525uS, Ts0l=525uS in the described register, Ts1h=525uS, Ts1l=1575uS, △ T=52uS, CN=12, Fppm=1;
When 7), equaling greatly 900uS-90uS and the little 900uS+90uS of equaling, Tl and equal greatly 900uS-90uS and the little 900uS+90uS of equaling such as Th, then IR is the RC-5 standard of the Manchester coding of Philip, makes Ts0h=1800uS, Ts0l=1800uS in the described register, Ts1h=900uS, Ts1l=900uS, CN=12, △ T=90uS, Fppm=0;
When 8), equaling greatly 500uS-50uS and the little 500uS+50uS of equaling, Tl and equal greatly 2500uS-250uS and the little 2500uS+250uS of equaling such as Th, then IR is the NRC17 standard of the Manchester coding of Nokia, makes Ts0h=1000uS, Ts0l=1000uS in the described register, Ts1h=500uS, Ts1l=500uS, △ T=50uS, CN=17, Fppm=0; But it should be noted that the code word of receiving is the radix-minus-one complement of NRC17 code word;
9), all be discontented with the upper condition that is enough to such as Th, Tl, then received code word or the wrong code word that to identify, should withdraw from the receiving course of frame information, and make Th=0, Tl=0, remeasured.
6. self-adaptation the multi-system infrared decoding module according to claim 4, it is characterized in that: the deterministic process of described decision device contraposition information is as follows:
When 1), IRup is effective:
1., such as Fppm=1, then equal greatly Ts0h-△ T such as Th and the little Ts0h+ of equaling △ T, Tl equal greatly Ts0l-△ T and the little Ts0l+ of equaling △ T, the position information of then receiving is 0, makes Brec=0, Th=0, Tl=0; Equal greatly Ts1h-△ T and the little Ts1h+ of equaling △ T, Tl equal greatly Ts1l-△ T and the little Ts1l+ of equaling △ T such as Th, the position information of then receiving is 1, makes Brec=1, Th=0, Tl=0; Otherwise received invalid information, should withdraw from whole receiving course, and made Th=0, Tl=0, remeasured;
2., such as Fppm=0, then equal greatly Ts0l-△ T such as Tl and the little Ts0l+ of equaling △ T, Th equal 0, the position information of then receiving is 1, makes Brec=1, Th=0, Tl=0; Equal greatly Ts1h-△ T and the little Ts1h+ of equaling △ T, Tl equal greatly Ts1l-△ T and the little Ts1l+ of equaling △ T such as Th, the position information of then receiving is 1, makes Brec=1, Th=0, Tl=0; Equal greatly Ts1l-△ T and the little Ts1l+ of equaling △ T, Th equal 0 such as Tl, also half the information just of then receiving continues to wait for the arrival at next edge; Otherwise received invalid information, should withdraw from whole receiving course, and made Th=0, Tl=0, remeasured;
When 2), IRdown is effective:
1., such as Fppm=0, then equal greatly Ts0h-△ T such as Th and the little Ts0h+ of equaling △ T, Tl equal 0, the position information of then receiving is 0, makes Brec=0, Th=0, Tl=0; Equal greatly Ts1h-△ T and the little Ts1h+ of equaling △ T, Tl equal greatly Ts1l-△ T and the little Ts1l+ of equaling △ T such as Th, the position information of then receiving is 0, makes Brec=0, Th=0, Tl=0; Equal greatly Ts1h-△ T and the little Ts1h+ of equaling △ T, Tl equal 0 such as Th, also half the information just of then receiving continues to wait for the arrival at next edge; Otherwise received invalid information, should withdraw from whole receiving course, and made Th=0, Tl=0, remeasured;
2., such as Fppm=1, also half the information just of then receiving continues to wait for the arrival at next edge.
7. an application rights requires the control circuit of 4 described self-adaptation the multi-system infrared decoding modules, it is characterized in that: comprise described self-adaptation the multi-system infrared remote control decoding module, interface module, LED reading scan driver module, keyboard scan and debounce dynamic model piece and built-in RC oscillator and electrification reset module; Described built-in RC oscillator links to each other with debounce dynamic model piece, infrared remote control receipt decoding module with described interface module, LED reading scan driver module, keyboard scan with the electrification reset module; Described interface module links to each other with microprocessor to external application interface bus I2C or SPI, internally links to each other with debounce dynamic model piece, infrared remote control receipt decoding module with described LED reading scan driver module, keyboard scan; Described LED reading scan driver module is the turntable driving light-emitting diode display directly, and provides scanning impulse for described external connection keyboard; Described keyboard scan and debounce dynamic model piece receive the status information of external connection keyboard, and when having key to press, finish shake removal function and key recognition function, to the key of the pressing rear run-out key information of encoding.
8. control circuit according to claim 7, it is characterized in that: this control circuit is to be integrated on the integrated chip.
9. an application rights requires the control circuit of 4 described self-adaptation the multi-system infrared remote control decoding modules, it is characterized in that: comprise interface module, power management module, built-in RC oscillator and electrification reset module and described infrared remote control receipt decoding module; Described built-in RC oscillator is connected with described interface module, power management module, infrared remote control receipt decoding module with the electrification reset module; Described interface module links to each other with microprocessor to external application interface bus I2C or SPI, internally is connected with described power management module, infrared remote control receipt decoding module; Described infrared remote control receipt decoding module receives the signal IRin of infrared remote control Receiver output, and its code value of receiving send described power management module, and described power management module output signal PWRon is used for the switch of control power supply.
10. control circuit according to claim 9, it is characterized in that: this control circuit is to be integrated on the integrated chip.
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Granted publication date: 20140326 Termination date: 20171117 |