CN102457268A - Implementation method for 32-bit capture register - Google Patents
Implementation method for 32-bit capture register Download PDFInfo
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- CN102457268A CN102457268A CN2010105157665A CN201010515766A CN102457268A CN 102457268 A CN102457268 A CN 102457268A CN 2010105157665 A CN2010105157665 A CN 2010105157665A CN 201010515766 A CN201010515766 A CN 201010515766A CN 102457268 A CN102457268 A CN 102457268A
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Abstract
The invention provides an implementation method for a 32-bit capture register. The method comprises the following steps of: selecting an I/O (Input/Output) port of a used microprocessor; defining the I/O port as a capture port; setting an interrupt trigger mode of the I/O port as raising edge or falling edge interrupt trigger, wherein the I/O port is used for detecting a square wave signal carrying with frequency information; selecting a 16-bit timer of the used microprocessor; and configuring a first timer/counter and a second timer/counter of the 16-bit timer as a 32-bit period counter by calling a TIMER_CONFIGURE function. By setting a power system frequency measuring program, a frequency capture function of the 32-bit capture register is realized. The implementation method is simple and can guarantee the accuracy of power system frequency measurement.
Description
Technical field
The present invention relates to the implementation method of microprocessor 32 bit registers, particularly be used for 32 implementation methods of catching register that power system frequency is measured.
Background technology
Need in the electric power system accurately to measure its electric frequency, portioned product has only 16 to catch register in the more microcontroller but use in the market, and these 16 are caught the register maximum count value is 65536; Timing is spaced apart 1.31072ms; And the power frequency period of general microprocessor is 20ms, in this case, and when utilizing 16 bit frequencies to catch to send device measuring electrical frequency; Need full 15 the maximum cycle values of counting just can reach a power frequency time interval; Even if can count full power frequency period at interval, the resolution of its frequency measurement also can be lower, can not guarantee the precision that electric frequency measurement is calculated.In this case, most protective devices adopt fixed sampling frequency to sample, and perhaps adopt slotting point mode to carry out compensation data, still, when above-mentioned sample mode causes frequency change when measuring system owing to fault, just can't guarantee the accuracy of sample frequency.
Summary of the invention
The object of the present invention is to provide a kind of 32 implementation methods of catching register, can overcome deficiency of the prior art, guaranteed the precision that power system frequency is measured.
For achieving the above object, technical scheme of the present invention is: 32 implementation methods of catching register of the present invention may further comprise the steps:
Step 1: an I/O mouth (input/output of selected used microprocessor; Input/output port); Described I/O mouth is defined as catches mouth; And the down trigger mode of described I/O mouth is set to rising edge or trailing edge down trigger, and this I/O mouth is used to detect the square-wave signal that has frequency information;
Step 2: one 16 bit timing devices (timer) of selected described microprocessor; Through calling the TIMER_CONFIGURE function one first Timer (timerA) and one second Timer (timerB) of described 16 bit timing devices is configured to 32 bit period counters, makes this 16 bit timing utensil that 32 bit count functions arranged.
Preferably, described I/O mouth has higher interrupt priority level, perhaps has capturing function.
Preferably, the interrupt priority level of described I/O mouth is set to 2.
Preferably, described first Timer and second Timer are 16.
Preferably, the loading value of described first Timer is as the initial value of 32 bit period counters, and the current count value of described second Timer is the currency of described 32 bit period counters.
Preferably; Under 32 bit patterns; When first Timer and second Timer are configured to complete 32 bit period counters, to the operations of first Timer and second Timer, as loading initial value, operation control, interruption controls etc.; All be with to the control of the operations of first Timer, and the operation of second Timer is not had any effect to generally 32 bit period counters as generally 32 bit period counters.
Catch the electric frequency that register is used to measure electric power system for 32 of the present invention, realize simply, and can guarantee the precision that power system frequency is measured.
Description of drawings
Fig. 1 is 32 overview flow charts of catching the implementation method of register of the present invention;
Fig. 2 catches the flow chart of an embodiment of the implementation method of register for 32 of the present invention.
Embodiment
For making the feature and advantage of the present invention can be more obviously understandable, the present invention be done further detailed explanation below in conjunction with accompanying drawing and specific embodiment.
See also Fig. 1,32 implementation methods of catching register of the present invention may further comprise the steps:
Step 1: an I/O mouth (input/output of selected used microprocessor; Input/output port); Described I/O mouth is defined as catches mouth; And the down trigger mode of described I/O mouth is set to rising edge or trailing edge down trigger, and this I/O mouth is used to detect the square-wave signal that has frequency information;
Step 2: one 16 bit timing devices (timer) of selected described microprocessor; Through calling the TIMER_CONFIGURE function one first Timer (timerA) and one second Timer (timerB) of described 16 bit timing devices is configured to 32 bit period counters, makes this 16 bit timing utensil that 32 bit count functions arranged.
Preferably, described I/O mouth has higher interrupt priority level, perhaps has capturing function.
Preferably, the interrupt priority level of described I/O mouth is set to 2.
Preferably, described first Timer and second Timer are 16.
Preferably, the loading value of described first Timer is as the initial value of 32 bit period counters, and the current count value of described second Timer is the currency of described 32 bit period counters.
Preferably; Said TIMER_CONFIGURE function comprises two parameter values; Be respectively timer parameter and figure place parameter, present embodiment is that the timer 2 of processor is set to 32 bit period counters, and the timer parameter in the TIMER_CONFIGURE function is set to timer 2; The figure place parameter is set to 32, then can first Timer and second Timer of timer 2 be configured to 32 bit period counters.
Preferably; Under 32 bit patterns; When first Timer and second Timer are configured to complete 32 bit period counters, to the operations of first Timer and second Timer, as loading initial value, operation control, interruption controls etc.; All be with to the control of the operations of first Timer, and the operation of second Timer is not had any effect to generally 32 bit period counters as generally 32 bit period counters.
See also Fig. 2, may further comprise the steps when the present invention implements:
S101: select an I/O mouth (input/output, input/output port) of the used microprocessor of electric frequency measuring system, this I/O mouth edge is set triggers interrupt mode, be used to detect the square-wave signal that has frequency information; And
Select the one 16 bit timing devices (present embodiment is selected the timer 2 of used microprocessor) of used microprocessor, it is used to realize 32 bit period counter function;
S102: the external interrupt of closing used microprocessor;
S103: close the peripheral module of used microprocessor, this peripheral module comprises I/O mouth module, timer module, A/D sampling module and watchdog module etc.;
S104: the measuring system clock is set; Promptly enable PLL (Phase Locked Loop; Phase-locked loop or phase-locked loop) and be connected to microprocessor as system clock; It is 200MHz that the PLL output frequency is set, and the frequency division value of measuring system output frequency divider is set to 4, and then to carry out the output frequency behind four frequency divisions be 50MHz in system;
S105: enable the I/O mouth and interrupt;
S106: initialization I/O mouth, selected I/O mouth is defined as catches mouth, this is caught and mouthful is set to input port, and this is set catches mouthful rising edge or trailing edge triggering mode;
S107: initialization first Timer and second Timer, second Timer is set to have the counter of capturing function;
S108: enable first Timer and second Timer;
S109: call the TIMER_CONFIGURE function first Timer and second Timer are configured to 32 bit period counters; In 32 singles triggerings and cycle timer pattern; First Timer and second Timer connect together and are configured to 32 down counters; And according to writing the GPTM first Timer pattern (GPTMTAMR; The value of the TAMR bit field general purpose timer first Timer pattern) can be confirmed it is chosen as cyclic pattern, need not write the GPTM second Timer pattern (GPTMTBMR, the general purpose timer second Timer pattern) this moment;
S110: the loading value a that first Timer is set is (in the present embodiment; Used operation frequency of microprocessor is 50MHz; It is 1999999 that a value then is set), as the initial value of 32 bit period counters, the current count value b of second Timer is set to the currency of 32 bit period counters;
S111: the output of forbidding first Timer and second Timer triggers function;
S112: the interruption of overflowing of first Timer and second Timer is set;
S113: enable first Timer and second Timer and begin counting.
During enforcement; Catch register and begin frequency measurement when work when these 32; At first, the frequency measurement program of electric power system gets into I/O mouth interrupt service routine, and this power system frequency process of measurement gets into to have no progeny in the I/O mouth at every turn and all takes out the currency b of 32 bit period counters immediately; And the initial value of 32 bit period counters is set to a (because after frequency measuring system powers on, the data message in 1 second will be dropped) immediately.After the frequency measurement program running 1 second; When this frequency measurement program gets into I/O mouth interrupt service routine once more; Take out the currency b of this 32 bit period counter, deduct currency b with its initial value a and obtain a difference, this difference promptly is the timing numerical value of a power frequency period; With the dtd of this difference is floating number (float type), and computing formula is following:
Wherein, f is the electric frequency values of required measurement, and the molecular moiety of this formula is the operating frequency of used microprocessor.
Result of the test shows: if adopt 16 to catch the electric frequency that register is measured electric power system, because 16 maximum count value of catching register are 0xffff, timing is spaced apart 1.31072ms; And a power frequency period is 20ms; So, in this case, catch for 16 and send device and need count full 15 maximum cycle values and just can reach a power frequency time interval; But program can't be handled this situation, also can't guarantee the power system frequency certainty of measurement; If adopt 32 of the present invention to catch the electric frequency that register is used to measure electric power system, realize simply, and can guarantee precision≤0.01Hz that power system frequency is measured.
Obviously, the foregoing description is merely the explanation of technical scheme of the present invention and unrestricted, and various changes that technical scheme of the present invention is carried out and be equal to replacement and do not break away from the spirit and scope of the present invention all should be encompassed within the claim scope of the present invention.
Claims (4)
1. 32 implementation methods of catching register is characterized in that, may further comprise the steps:
Step 1: an I/O mouth of selected used microprocessor, the down trigger mode of described I/O mouth is set to rising edge or trailing edge down trigger, and this I/O mouth is used to detect the square-wave signal that has frequency information;
Step 2: one 16 bit timing devices of selected described microprocessor are configured to 32 bit period counters through calling the TIMER_CONFIGURE function with one first Timer and one second Timer of described 16 bit timing devices.
2. 32 implementation methods of catching register according to claim 1 is characterized in that the interrupt priority level of described I/O mouth is set to 2.
3. 32 implementation methods of catching register according to claim 1 is characterized in that described first Timer and second Timer are 16 bit timings/counter.
4. 32 implementation methods of catching register according to claim 3; It is characterized in that; The loading value of described first Timer is set to the initial value of described 32 bit period counters, and the current count value of described second Timer is set to the currency of described 32 bit period counters.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102938197A (en) * | 2012-10-26 | 2013-02-20 | 合肥移瑞通信技术有限公司 | Method for decoding infrared remote control by means of input capture interrupt mode |
| CN105302226A (en) * | 2015-10-30 | 2016-02-03 | 北京时代民芯科技有限公司 | APB bus-based multi-function mode timer circuit |
| CN105807843A (en) * | 2016-03-17 | 2016-07-27 | 东莞华芯世纪微电子有限公司 | Method for achieving timer/counter and apparatus using method |
| CN112650119A (en) * | 2020-12-22 | 2021-04-13 | 深圳市禾望电气股份有限公司 | Method and device for expanding event occurrence time measurement range based on MCU |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1553336A (en) * | 2003-05-30 | 2004-12-08 | 中兴通讯股份有限公司 | Testing software timing method |
| US20090184742A1 (en) * | 2008-01-23 | 2009-07-23 | Microchip Technology Incorporated | Externally Synchronizing Multiphase Pulse Width Modulation Signals |
| CN101495959A (en) * | 2006-08-02 | 2009-07-29 | 高通股份有限公司 | Method and system to combine multiple register units within a microprocessor |
-
2010
- 2010-10-15 CN CN201010515766.5A patent/CN102457268B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1553336A (en) * | 2003-05-30 | 2004-12-08 | 中兴通讯股份有限公司 | Testing software timing method |
| CN101495959A (en) * | 2006-08-02 | 2009-07-29 | 高通股份有限公司 | Method and system to combine multiple register units within a microprocessor |
| US20090184742A1 (en) * | 2008-01-23 | 2009-07-23 | Microchip Technology Incorporated | Externally Synchronizing Multiphase Pulse Width Modulation Signals |
Non-Patent Citations (1)
| Title |
|---|
| 党力明等: "基于89C55WD单片机的32位高精度计时器", 《测绘科学技术学报》, vol. 24, no. 5, 31 October 2007 (2007-10-31) * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102938197A (en) * | 2012-10-26 | 2013-02-20 | 合肥移瑞通信技术有限公司 | Method for decoding infrared remote control by means of input capture interrupt mode |
| CN105302226A (en) * | 2015-10-30 | 2016-02-03 | 北京时代民芯科技有限公司 | APB bus-based multi-function mode timer circuit |
| CN105302226B (en) * | 2015-10-30 | 2018-01-16 | 北京时代民芯科技有限公司 | A kind of multifunctional mode timer circuit based on APB buses |
| CN105807843A (en) * | 2016-03-17 | 2016-07-27 | 东莞华芯世纪微电子有限公司 | Method for achieving timer/counter and apparatus using method |
| CN105807843B (en) * | 2016-03-17 | 2019-07-23 | 东莞华芯世纪微电子有限公司 | A kind of method that realizing Timer/Counter and device in this way |
| CN112650119A (en) * | 2020-12-22 | 2021-04-13 | 深圳市禾望电气股份有限公司 | Method and device for expanding event occurrence time measurement range based on MCU |
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Inventor after: Di Fuchang Inventor after: Gao Longji Inventor after: Chen Lei Inventor after: Zhao Changbing Inventor after: Li Huiyong Inventor after: Zhang Jian Inventor after: Li Zengli Inventor after: Wang Jingren Inventor after: Liu Guoying Inventor after: Ou Yangqiang Inventor after: Chang Hongqi Inventor before: Di Fuchang Inventor before: Zhao Changbing Inventor before: Xiao Yonghua Inventor before: Li Zengli Inventor before: Wang Jingren Inventor before: Liu Guoying Inventor before: Ou Yangqiang Inventor before: Chang Hongqi Inventor before: Chen Lei |
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Address after: 101300 1, 1 yuan 17, Juyuan Road, Mapo Town, Shunyi District, Beijing. Patentee after: Beijing DeWitt electric Polytron Technologies Inc Address before: 101318 Beijing Shunyi District Tianzhu Airport Industrial Area B area Anqing avenue a 9 Patentee before: Beijing Devote Relay Protection Technology Co., Ltd. |
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