Dotdashs brands help over 100 million users each month find answers, solve problems, and get inspired.Dotdash is among the fastestgrowing publishers online.Serial Port Communication Dot Net' title='Serial Port Communication Dot Net' />A PIC Microcontroller introduction.What. can you do with a microcontroller Answer Virtually Any Project Easily.Microcontrollers give you a fantastic way.A PIC microcontroller is a processor with built in memory.RAM and you can use it to control your projects or build projects around.Ham Radio Software on Centos Linux Configuring multitudes of Amateur HAM Radio software for Centos6 Centos5 Linux.MB Communication Online Accessoires Store Delivery All Over Pakistan For Order Call or SMS Now at 03008265122.So it saves you building a circuit that has separate external RAM, ROM.What this really means for you is that you have a very powerful device that.EEPROM. Timers. Analogue comparators.UART. Even with just these four modules note these are just example modules there.Frequency counter using the.UART RS2. 32 or output to LCD.Capacitance meter analogue.Event timer using internal.Event data logger capturing analogue.ADC and using the internal EEPROM for storing data.I2. C for high data storage capacity.Servo controller Control through.UART using the internal PWM module or using a software created PWM.The PIC Micro is one of the most popular microcontrollers and in case you were.In fact the 8 pin DIL version of the 1.F6. 75 has an amazing number of internal.These are Two timers.One 1. 0bit ADC with 4 selectable inputs.An internal oscillator or you can use an external crystal.An analogue comparator.Bytes of RAM. 1. 28 Bytes of EEPROM memory.External interrupt as well as interrupts from internal peripherals.External crystal can go up to 2.MHz. ICSP PIC standard programming interface.And all of these work from within an 8 pin DIL package In the mid range devices the memory space ranges from 1k to 8k 1.F parts have. more this does not sound like a lot but the processor has an efficient.LM3. 5 temperature sensing project that reports.Features. In fact a PIC microcontroller is an amazingly powerful fully featured processor.RAM, EEROM FLASH memory and peripherals.One of the smallest.ADC, 1k of memory, 2.IO ports a comparator a watch dog timer.I could go on. as there is more Programming.One of the most useful features of a PIC microcontroller is that you can.F in the. part number e.F6. 75 not 1. 2C5.You can also use the ICSP serial interface.PIC Microcontroller for programming and even do programming.You can either program a PIC microcontroller using assembler or a high level.I recommend using a high level.C as it is much easier to use after an initial learning.Once you have learned the high level language you are not forced to.AVR or Dallas microcontroller.Input Output IOA PIC Microcontroller can control outputs and react to inputs e.With the larger devices its possible to drive LCDs or seven segment displays.PIC Micro. Comparing a frequency counter to.So using them saves prototype.Many now have a built in ADC so you can read analogue signal levels so you.LM3. 5 temperature sensor directly with no.Peripherals. The PIC microcontroller has many built in peripherals and this can make using.I have made this introductory page.At the end is a short summary of the main devices used in projects shown.The best way to start is to learn about the main features of a chip and then.I think learning by doing is the.Feature. PIC microcontroller.Flashmemory. Re programmable program.RAMMemory. storage for variables.EEPROMLong term. stable memory Electrically Erasable Programmable Read.Only Memory. IO. High current InputOutput ports.TimersCounters. Typically 3.USARTBuilt in. RS2.CCPCaptureComparePWM module.SSPI2. C and. SPI Interfaces.Comparator. An analogue comparator and internal voltage.ADCAnalogue. to digital converter.PSPParallel Slave Port for 8 bit.LCDLCD. interface.Special. features.ICSP,WDT,BOR,POR,PWRT,OST,SLEEPICSPSimple programming using In.Circuit Serial Programming.Note these. are some of the main features some chips have all of these and some dont.Flash memory. This is the program storage area and gives you the most important benefit for using a PIC.You program the device many times.Since when does anyone get.Devices used in projects on this.Flash memory these have the letter F in the.You can get cheaper OTP devices but these are.One Time Programmable once programmed you cant program it again ICSP.In Circuit Serial Programming ICSP is the next most important benefit.Instead of. transferring your chip from the programmer to the development board you just.By arranging the programming connections to your.You can re program the device while.IO Ports. Input Output ports let you communicate with the outside world so you can.LCDs or just about anything with the right interface.You can. also set them as inputs to gather information.Pin direction. Most PIC microcontroller pins can be set as an input or and output and this.The TRIS register controls the IO.This allows you to use a pin for multiple operations e.Real Time clock project uses RA0, the first.PORTA, to output data to a seven segment display and at a later point in.Current. The PIC IO ports are high current ports capable of directly driving LEDs.A this is. often for the whole chip or specified for several ports combined.Timer Counters. Each PIC microcontroller has up to three timers that you can either use as.Timer 1 2 or a baud clock Timer 2.Timer 0. The original timer Timer 0 was the first timer developed and you can find.F8. 4 up to the most current e,g, 1.F8. 77. A. It is an 8 bit timer with an 8 bit prescaler that can be driven from an.Fosc4 or external clock.It generates an interrupt on overflow.Timer 0 always synchronizes the input clock when using external clock.Note You can read and write timer 0 but you can not read the prescaler.Note The prescaler changes its effect depending on whether it is a timer.Timer 1 This is a 1.It has an 8 bit programmable prescaler and you can.Fosc4 or an external pin.To eliminate false triggering it also has an optional input synchronizer for.This timer can be used in sleep mode and will generate a wakeup interrupt on.Timer 1 is also read by the CCP module to capture an event time.Note Using this timer in sleep mode will use more current.In addition it can be used to drive a low power watch crystal.This is. something that sounds good but I dont recommend you do it as watch crystals.You should only use it if you are.I. used a DS1. 30.Real Time clock. project which drives the crystal directly but even this is difficult to get.Timer 2 This is an 8 bit timer with an 8 bit prescaler and an 8 bit postscaler.It. takes its input only from the internal oscillator Fosc4.This timer is used for the timebase of a PWM when PWM is active and it can be.SSP module as a baud clock.It also has a period register that allows easy control of the period.When. timer 2 reaches the PR2 register value then it resets.This saves having to.USARTThe USART is a useful module and saves having to code up a software version. Best Pc Cleaner Software Yahoo Updates . You can find more information on RS2.Look here for pin outs.All you need to interface it to a PC serial port is a MAX2.Note An equivalent MAX2.SP2. 02. ECP that has the same pinout as.MAX2. 32 but lets you use 1.F capacitors so you dont need the large 1u.F. caps. Baud Rates.You have to be careful using the baud rates as they depend on the main clock.There is a table of baud rates in microchip data sheet DS3.A which indicates.You sometimes have to play around with the register settings to get a better.An example is for an.MHz clock if you use BRGH1 and an 8.MHz clock see the 1.F8. 8 datasheet you.You have to force this to work e.C the built in USART routines use BRGH0 so at 8.MHz the baud rate is.If you want a super accurate baud rate the best way is to use a clock crystal.CCP The CaptureComparePWM module has three modes of operation Capture Capture the time of an event.Compare Generate an output when Timer 1 reaches a value.PWM Pulse Width Modulation.Capture Capture mode is used to capture the value of Timer 1 when a signal at the.CCP pin goes high or low depending on how the CCP is set up.The CCP can. accurately capture the arrival time of a signal at the CCP pin so it can be.Compare. Compare mode is used to generate an output when Timer 1 reaches a value you.CCPR1. One special event trigger mode lets you start the ADC when.PWMPWM gives you one Pulse Width Modulation output with 1.It uses Timer 2 to define its operation using Timer 2 period register to define.PWM. Note The duty cycle is not a percentage it is the number of periods of the PWM.SSP. The Synchronous Serial Port lets you communicate with devices that use either.SPI Serial Peripheral Interface or I2.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |