arduino s analog to digital converter adc

... SSPBUF to adc_ result movlw banksel movwf banksel btfss goto banksel bsf movf banksel movwf 0x81 SSPBUF SSPBUF SSPSTAT SSPSTAT,BF spi_busy2 PORTA CS SSPBUF,w adc_ result adc_ result ; ; ; ; ; ; ... spi_busy1 btfss SSPSTAT,BF goto spi_busy1 banksel SSPBUF movf SSPBUF,w banksel adc_ result DS00719A-page 12  1999 Microchip Technology Inc AN719 spi_busy2 movwf adc_ result+1 ; write SSPBUF to adc_ result ... linker to select SFR bank read SSPBUF and place into W linker to select GPR bank ; Read MCP3201 ADC for bytes Read _Adc banksel PORTA bcf CS movlw 0x01 banksel SSPBUF movwf SSPBUF banksel SSPSTAT spi_busy1...

Ngày tải lên: 11/01/2016, 11:34

... variety of settings Such signals share the common characteristic that information is delivered in bursts rather in a constant stream, that is, the sEMG signals used in this simulation A 4-bit flash-type ... using as little samples as possible, LC is often advantageous SUMMARY In this paper, we addressed the essential issue of level placement in an LC ADC, and showed the feasibility of a sequential ... necessary sampling bandwidth to obtain good-quality samples is relatively low as well SIMULATION RESULTS In this section, we test the sequential algorithms introduced in Section on a set of surface...

Ngày tải lên: 22/06/2014, 01:20

... Unadjusted Error is the same as absolute error Again, sometimes it is reported as the sum of offset, full-scale and integral non-linearity errors No Missing Code No missing code implies that as the ... WR TRIS CK Q N Q VSS If possible, avoid any digital output next to analog inputs Avoid digital inputs that switch frequently (e.g., clocks) next to analog inputs If VREF is used, then ensure that ... register as a normal register: The A/D only writes to the ADRES register at the end of a conversion Therefore, it is possible to use the ADRES register as a normal file register between conversions and...

Ngày tải lên: 11/01/2016, 11:50

... reader to review the entire book to solve a specific problem Support by Analog Devices The Second Edition of this book includes two new chapters on Digital Signal Processors, microprocessors specifically ... Processor 509 Fixed versus Floating Point 514 C versus Assembly 520 How Fast are DSPs? 526 The Digital Signal Processor Market 531 Chapter 29 Getting Started with DSPs 535 The ADSP-2106x ... mind Many everyday DSP applications are discussed: digital filters, neural networks, data compression, audio and image processing, etc As much as possible, these chapters stand on their own,...

Ngày tải lên: 13/09/2012, 10:21

... Register A - ADCSRA ADEN ADSC ADATE ADIF ADIE ADPS2 ADPS1 ADPS0 ADC Data Register - ADCH and ADCL (ADLAR = 0) 15 ADC7 - - - - - ADC6 ADC5 ADC4 ADC3 ADC2 ADC9 ADC8 ADCH ADC1 ADC0 ADCL ADC ... Register - ADCH and ADCL (ADLAR = 1) ADC9 ADC8 ADC7 15 ADC1 ADC6 ADC5 ADC4 ADC3 ADC2 ADCH ADC0 FIGURE 3.10: ADC registers - - - - - ADCL ANALOG- TO- DIGITAL CONVERSION The REFS[1:0] bits of ... in digital systems Now that we understand the sampling process, let us move on to the second process of the ADC, quantization Each digital system has a number of bits, which it uses as the basic...

Ngày tải lên: 29/09/2013, 20:20

... an analog signal as its output, whereas a speech recognition system may pass the digital output of the DSP system to a computer system for further processing This section will describe basic converter ... technology, an increasing portion of signal processing tasks have been shifted from the usual analog domain to digital domain For digital systems to interact with analog signal sources, such as voice, data, ... desired accuracy, bandwidth that is required, and the cost of the system Figure 5.1 shows the basic elements of a digital signal processing system The analog signal is first converted to a discrete...

Ngày tải lên: 27/01/2014, 03:20

... areas in computer science by the unique type of data it uses: signals In most cases, these signals originate as sensory data from the real world: seismic vibrations, visual images, sound waves, ... will also need to study Digital Signal Processing Communication Theory Numerical Analysis Probability and Statistics Analog Signal Processing Analog Electronics Digital Electronics Decision Theory ... T-carrier system can simultaneously transmit 24 voice signals Each voice signal is sampled 8000 times per second using an bit companded (logarithmic compressed) analog- to- digital conversion This results...

Ngày tải lên: 31/03/2014, 22:20

... parallel system using lowpass modulators is designed The signal is assumed to be in the frequency band −π/4 < ωT < π/4, and the ADC is thus an oversampled system and is described according to Section ... modulation sequence errors are irrelevant in this case, as the signal is not modulated The FBDM ADC is thus highly resistant to mismatches Its obvious drawback, however, is the need to use bandpass modulators ... It is seen that S0 and S1 are circulant matrices Also, S2 +S3 is circulant Further, the remaining matrices sum to a circulant matrix S4 + S5 + S6 + S7 , whereas no smaller subset does Thus, in...

Ngày tải lên: 22/06/2014, 19:20

... and are thus interested in maximizing SQNR, the feedback signal used was always a square wave pulse In the simulations, the pulse was always as short as possible (its length was equal to the temporal ... inconsistencies in pulse sizes, and so forth In fact, the system actually requires some randomness to operate, which is why in some simulations, we have set the gain to a distribution of values ... first stage to prevent signal degradation Since spikes are such short-time events, the gain is necessary for the output signal to affect the next stage For these simulations, if two neurons spiked...

Ngày tải lên: 23/06/2014, 01:20

... areas in computer science by the unique type of data it uses: signals In most cases, these signals originate as sensory data from the real world: seismic vibrations, visual images, sound waves, ... will also need to study Digital Signal Processing Communication Theory Numerical Analysis Probability and Statistics Analog Signal Processing Analog Electronics Digital Electronics Decision Theory ... T-carrier system can simultaneously transmit 24 voice signals Each voice signal is sampled 8000 times per second using an bit companded (logarithmic compressed) analog- to- digital conversion This results...

Ngày tải lên: 28/06/2014, 06:20

... input to the MOTOROLA 6-5 modulator is close to a plus full scale, the output is positive during most clock cycles A similar statement holds for the case when the sinusoid is close to minus full scale ... order Σ−∆ modulators are shown in Figure 6-8 Since these cascaded structures use a noise feed-forward scheme, the system is always stable and the analysis is simpler compared to the second-order ... Motorola Digital Signal Processors Principles of Sigma-Delta Modulation for Analog- toDigital Converters by Sangil Park, Ph D Strategic Applications Digital Signal Processor Operation MOTOROLA...

Ngày tải lên: 04/07/2014, 07:24

... conversion process itself Some of this noise is repeated or correlated noise, i.e distortion created by the converter itself With delta-sigma analog- to- digital converters, there is a subset of this ... side (line side), and this also supplies the ground for the system This is necessary as the shunt is connected directly to the channel input pins of the MCP3901 To reduce sensitivity to external ... Command SetPRESCALE(1); SetOSR(32); Possible Settings Description 1, 2, 4, Sets the prescaler to 1/N where N is the setting 32, 64, 128, 255 (Note 1) Sets the devices over-sampling ratio(OSR) 1, 2,...

Ngày tải lên: 11/01/2016, 16:55

... Hình 7.6a) S đồ mach ADC song song 3bit b) Bảng thật Nếu VA1v, có ngõ mạch so s nh xuống ... 0,2 V S so s nh thứ với 1/4 có đáp s No Vậy b2 = so s nh thứ với 1/4 có lời đáp No.Vậy b1 = So s nh thứ ba, Yes.Vậy b0 = Do đó, mã nhị phân cho 0,2V 001 * Với 0,8V So s nh thứ với1/2Yes => b2= ... tương tự s adc (analog- digital converter) Một mạch A/D to n tín hiệu mẫu cần 4.000 s đếm Tín hiệu tích phân cho 1/4 chu kỳ này, tức 1.000 s đếm Một tích phân thứ hai autozero cần giữ 3.000 s đếm...

Ngày tải lên: 31/12/2015, 16:37

... delay_ms(300); } } void main() { set_tris_a(0xff); set_tris_b(0xff); set_tris_c(0x00); ext_int_edge(h _to_ l); enable_interrupts(int_ext); enable_interrupts(global); setup _adc_ ports(ALL _ANALOG) ; setup _adc( ADC_CLOCK_INTERNAL); ... s hóa” (digitalize) liệu analog thành liệu digital Quá trình s hóa” thường thực thiết bị gọi “bộ chuyển đổi tương tự - s hay đơn giản ADC (Analog to Digital Converter) Phùng Tấn Đức MSSV ... dich_led_nhay_led() { set_tris_a(0xff); set_tris_b(0xff); set_tris_c(0x00); while (1) { { b=0xFF; for(a=1;a

Ngày tải lên: 23/04/2014, 23:57

... chosen to minimize the leakage errors across the resistors versus the RDSON error of the output pin, RA3 The capacitor has a value of 100nF RDSON Error This error comes from the drain-source resistance ... integration result is taken at a regular time interval If it is assumed that the time interval of a conversion is 20 s, the conversion time versus bits can easily be calculated This relationship is shown ... at RA0 causes a voltage drop across the parallel combination of R1 and R2 With these two resistors equaling 47kΩ, the error caused by this leakage current is ~11mV This is also close to a 0.2%...

Ngày tải lên: 11/01/2016, 11:33

... DW start start start start start start start start start start start start start start start ; VECTORS ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; SCI Serial System - RIE, TIE, TCIE, ILIE SPI Serial Transfer ... BCLR RESULT_MSB RESULT_LSB RESULT_MSB,$F0 ; Move bit into carry ; Rotate MSB bit0 into LSB bit7 ; Mask out upper bits of MSB JSR JSR hex _to_ ascii hex _to_ decimal ; Convert to ASCII for display ... bytes? No, so some more Else yes so restore X Return from subroutine ROUTINE FOR CONVERTING TO DECIMAL *************** hex _to_ decimal ck_thous LDD CLR CLR CLR CLR RESULT_MSB THOUS HUNDS TENS ONES...

Ngày tải lên: 11/01/2016, 11:33

... becomes unnecessary  Access Exemptions A security-minded administrator generally doesn’t want users to access the central temporary directory, since it can store sessions To prevent access to /tmp, ... portals, insecure code can have very serious consequences for a site, the site s owners, and the site s users This book has two goals: to explain the common types of security shortcomings that ... htaccess to specify configuration directives, so strive to write code that is register globals-safe The $_REQUEST Trojan Horse When superglobals were added to PHP, a special superglobal was added specifically...

Ngày tải lên: 14/08/2012, 10:14

... industry Chapter is devoted to discrete-time signals It describes some applications of digital signal processing and defines and, suggests several ways of describing discrete-time signals Examples ... 402 403 Signal Processing Toolbox 9.2.1 List of Functions in Signal Processing Toolbox 405 406 References Index 414 415 PREFACE This preface is addressed to instructors as well as students at the ... discrete-time signals are described A brief history of analog and digital filter design is given Then the advantages of digital signal processing over continuous-time (analog) signal processing is discussed...

Ngày tải lên: 13/09/2012, 10:21

... Uses Characteristics Formal Business letters, resumes, cover letters, serious speeches, newspaper articles, scholarship Standard verbs, adverbs with -ly endings, standard vocabulary, standard punctuation ... important English skills you need, from parts of speech to phrases, clauses, and sentences You'll learn how to craft the documents you need, including business letters, resumes, personal letters, and ... prepositional phrases, appositives and appositive phrases, verbal phrases, gerund phrases, and infinitive phrases This part also covers sentence structure and function, fragments and run-ons, and...

Ngày tải lên: 05/10/2012, 09:59