PROGRAMMING 8BIT PIC MICROCONTROLLERS IN C

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only needs to be synchronised over 10 or 11 cycles at the receiver (start ϩ 8/9data ϩ stop bit). It can be seen from these tables that the error can be up to10%, and the system should still work.Serial Communication203Else_IPM-BATES_ch009.qxd 6/29/2006 11:40 AM Page 203Test SystemThe U[r]

package, with high reliability and switching speed. Triac InterfaceA relay can be used to control a DC or an AC load, as it operates as a me-chanical switch. However, it has significant disadvantages, as outlined above.A solid-state switch, such as a transistor, is inherently more reliable, since it[r]

more reliable. An LED and phototransistor are connected in separate circuits,with the transistor operating as a light-activated switch. The opto-isolator in-cludes both in a single package, providing electrical isolation between con-trol and load circuits, which may operate at h[r]

highly susceptible to interference. The amplifier should be placed as near aspossible to the gauges, and connected with screened leads, and plenty of signaldecoupling. The output must then be scaled to suit the MCU ADC input.Pressure can be measured using an array of strain gauges attached to a di-a[r]

quired to drive the PDAC is relatively simple.Serial DACMany transducers are now provided with signal input and output using astandard serial data transfer protocol, such as SPI and I2C. The serial con-verter (SDAC) used here uses the SPI interface, which allows 12-bit outputto be transferred[r]

BSF STATUS,C ; rotate 1 into LSB and rot1 RLF ADhi ; shift high byte leftBCF STATUS,C ; rotate 0 into LSBRLF ADlo ; rotate low byte left againBTFSS STATUS,C ; carry out?GOTO rot2 ; no, leave carry clearBSF STATUS,C ; rotate 1 into LSB and rot2 RLF ADhi ; shift high byte l[r]

indicate that the conversion is complete. ADC CLOCKThe speed of the conversion is selected by bits ADSC1 and ADSC0. The ADCoperates by successive approximation; this means that the input voltage is fedto a comparator, and if the voltage is higher than 50% of the range, the MSBof the result is set hi[r]

At its most basic level, programming a computer simply means telling it what to do, and thisvapid-sounding definition is not even a joke. There are no other truly fundamental aspects ofcomputer programming; everything else we talk about will simply be the details of a particular,usuall[r]

response such as that in Figure 7.9 (b) is obtained. The output rises slowly,following an exponential curve, and may not reach the final value before theinput is reversed. This shows why DC switching frequencies are limited in allactive digital and analogue circuits – the outputs may n[r]

Page 6 [at_nightfall_09] - Mạch đo nhiệt độ điều khiển động cơ, hiển thị LCD. 6 read_adc(ADC_START_ONLY); sleep(); value=read_adc(ADC_READ_ONLY); ADC_done():Trả về 1 nếu bộ chuyển đổi đã hòan thành việc chuyển đổi của nó - Tiền xử lý có liên quan: #DEVICE ADC=xx : Định hình thể read_adc rồi t[r]

Interfacing PIC Microcontrollers276AtmelAtmel AVR is the most similar range to the PIC, in that it concentrates on8-bit MCUs, and includes miniature devices. The smallest AVR MCU is cur-rently the ATtiny11, with 1k flash program memory, 32 bytes of RAM, 6 I/Opins a[r]

sign requirements to be incorporated at an early stage. For reliable operation, it is suggested that a set of four temperature sen-sors are installed at the four corners of the storage space. In normal opera-tions, an average of these will displayed. If a single sensor goes faulty, wewill ass[r]

10 Steps to Becoming aProfessional Software EngineerWritten & Compiled for iD Tech Camps by Audrey Van Norman & Christian Snodgrass10 Steps to Becoming aProfessional Software EngineerPrepare to get excited about Computer Science – it’s a dynamic field with endless opportunities for cr[r]

  Connectable programming devices/PCs SIMATIC PG/PC, standard PC SIMATIC PG/PC, standard PC Expansion devices, max. 7; Only expansion modules of the S7-22x series can be used. Due to the limited output current, the use of expansion modules may be limited. 7; Only expansion modules of the S7[r]

Code mẫu cho PIC - Nháy LED đơn Nhấp nháy LED có thể coi là một chương trình “Kinh điển”. Mỗi người khi bắt tay vàohọc VĐK thì bài học đầu tiên là làm nhấp nháy một hay vài con LED trên chân VĐK. Trongtài liệu này tôi cũng chọn bài tập đó để bắt đầu.Mục đích của bài như trên đã nói: Làm nhấp[r]

offset to approximately the correct value at the mid-output level (1.280 V),and then adjusting the gain to give the right output at the maximum level(2.500). These steps are then repeated until the reading is correct at the midand max values. This is usually necessary because the gain and offset int[r]

together to form some typical MCU-based systems. A base module will bedesigned which will be used for a range of different measurement and controlapplications, a parallel memory expansion scheme outlined, and the range ofPIC microcontrollers and other processor families reviewed. Base SystemT[r]

IF last page done reset high address latchquit Latch high address Reset low address Figure 11.4 Parallel memory program outline Else_IPM-BATES_CH011.qxd 7/18/2006 1:27 PM Page 263Interfacing PIC Microcontrollers264chip has three inputs CBA, which receive a binary select code from the[r]

; ; Generates timed output interval; using Timer 2 in compare mode; Timer interrupt sets output, cleared after 1ms ; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; PROCESSOR 16F877; Clock = XT 4MHz, standard fuse settings __CONFIG 0x3731; LABEL EQUATES INCLUDE "P16F877.I[r]