How to interface i2ceeprom with pic16f pic development board. I 2 c or iic or i2c stands for interintegrated circuit. Aug 01, 2019 in fact, there is an i2c interface for the lcd which well be using in a future tutorial and its main feature is reducing the pin count used for lcd control. It is a very popular multimaster, multislave serial communication interface developed by philips. It can be easily interfaced with pic microcontroller by. The basic operation of the i2c based eeproms is to send a command, such as write, followed by an address and the data. A separate spi tutorial is provided for more information. Microchip, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. This produces a single instruction cycle time of 0. Read dht11 interfacing with pic12f1822 microcontroller. Jan 24, 2017 interfacing tc74 with pic requires you to know i2c in hand. Getting started with mikro c for pic writing your first program. So far you might have been using the esp8266 module as a standalone microcontroller or might have been using it with the arduino library.
This lcd2004 is a great i2c interface for 2x16 and 4x20 lcd displays. Pic microcontrollers the basics of c programming language. In this tutorial, we are discussing about i2c module in pic18f4550, how it can be implemented using firmware. Interfacing esp8266 with pic16f877a microcontroller. Mclr is used during programming, mostly connected to programmer like pickit. Integrating a microcontroller with a i2c peripheral device. Interface i2c with pic16 microcontroller controllerstech. The crystal oscillator of 12 mhz is connected to the osc1 and osc2 pins of pic microcontroller pic18f4550 for system clock. This small post shows an example for connecting lcd with hd44780 or complaint controller with microchip pic12f1822 8bit microcontroller, this microcontroller has only 8 pins of which 5 can be used as outputs, therefore an i2c lcd is required. Mq2 gas smoke sensor interfacing with pic microcontroller. Pic16f877a i2c tutorial eeprom interfaing embetronicx. In this section of tutorial we are going to talk about pic16f877a i2c module and all derivatives of pic has same module i. In this tutorial, we will learn how to operate the mssp module of pic microcontroller as i 2 c master. I2c or interintegrated circuit is a widely used serial communication protocol in the electronics world.
It doesnt look like you have set up the port pins for digital input and output. With the limited pin resources, your project may be out of resources using normal lcd shield. Lcd interfacing with pic microcontroller pic16f877a. Because very easy using pic16f877a and use flash memory technology so that can be writeerase until thousand times. General description the pcf857474a provides generalpurpose remote io expansion via the twowire bidirectional i2cbus serial clock scl, serial data sda. Apr 11, 2016 clock generated by the master on scl line will cause the data to shift in and shift out of the sspsr register which makes the i2c communication happen. Pin diagrams 10 pic16f873a876a 11 2 3 4 5 6 1 8 7 9 12 14 15 16 17 18 19 20 23 24 25 26 27 28 22 21 mclr. You can use different ports or pins for interfacing the lcd before going to different ports. This project works also with dfrobot i2c lcd displays the compiler used in this project is mikroelektronika mikroc pro. Lcd interfacing with pic microcontroller pic16f877a using. Spi communication with pic microcontroller pic16f877a.
Pic16f877a,lcd,and eeprom 24lc256 mean not found i2c debugger. It can be easily interfaced with a microcontroller. Interfacing lcd with pic microcontroller hi tech c. Interfacing the mcp23016 io expander with the pic16f877a. Interfacing tc74 with pic requires you to know i2c in hand. To interface this sensor with pic microcontroller, we only need to connect analog output pin of smoke sensor with analog input pin of pic microcontroller. Click the image to enlarge it pic16f877a pin configuration. This is an example for the master, check against the 16f877a datasheet. Interfacing peripheral devices with a microcontroller is an important part. Serial peripheral interface spi interintegrated circuit i2c the i2c interface supports the following modes in hardware. Jul 22, 20 hope that you got rough idea about how this lcd module works. The quasibidirectional port can be independently assigned as an input to monitor interrupt status or keypads, or as an output to activate indicator devices such as leds. Most of pic controllers specially 16f and 18f series have onchip i2c modules.
Figure 7 in the ad7416 data sheet shows a timing dia gram for such an operation. You may use any other avr,8051, pic,arm controller as well. Code for dht11 humidity and temperature sensor is given below. The synchronous protocols spi and i2c are managed by the master synchronous serial port mssp module. Mar 23, 2019 we have already learnt i2c communication with pic and so we must be familiar with how i2c works and where we can use them like i2c can be used to interface rtc module. The program is rather crude and pretty much the barebones minimum necessary to drive a pcf8574 i2c lcd backpack and hd44780 display using 172 words of program memory. In the transmit mode this bit will set when we write data to sspbuf.
I will also consider making a tutorial interface rc74 with pic. I have written tutorials about interfacing i2c with stm32 and lpc2148 and today we are going to interface i2c with pic16 microcontroller. I2c communication with pic microcontroller mplab xc8. All in all, what we need now is a routine to parse out halfabyte of data and send these bits to the corresponding pins of the io pins associated with lcd data. Jul 19, 2018 pic16f877a datasheet pdf microcontrollers microchip, pic16f877a pdf, pic16f877a pinout, pic16f877a data, circuit, output, ic, pic16f877a schematic. I2c is a synchronous communication protocol meaning, both the devices that are sharing the information must share a common clock signal. I2c i2c overviewoverview l i2c is a bidirectional protocol l data is sent either direction on the serial data line sda by the master or slave. So now lets see how to interface mq2 sensor with pic microcontroller. I2c is a synchronous communication protocol meaning, both the devices that.
Dht11 sensor interfacing with pic16f877a microcontroller. Pic16f877aip microchip technology integrated circuits. They all work the same way, but make sure to check the datasheet for the pin diagram before doing the connection. Reference manual should be considered a comple mentary. In fact, there is an i2c interface for the lcd which well be using in a future tutorial and its main feature is reducing the pin count used for lcd control. With this i2c interface lcd module, you only need 2 lines i2c to display the discription. You may use any other avr,8051,pic,arm controller as well.
Unlike uart, you can connect and communicate to multiple devices using the. C communication with pic microcontroller using mssp module. Pic16f87xa ds39582bpage 2 2003 microchip technology inc. Ic pic16f877a this powerful 200 nanosecond instruction execution yet easytoprogram only 35 single word instructions cmos flashbased 8bit microcontroller packs microchip s powerful pic architecture into an 40 or 44pin package and is upwards co. The ds7 rtc real time clock ic an i2c real time clock is an 8 pin device using an i2c interface.
Pic16f877a datasheet pdf microcontrollers microchip, pic16f877a pdf, pic16f877a pinout, pic16f877a data, circuit, output, ic, pic16f877a schematic. The i2c 1602 lcd module is a 2 line by 16 character display interfaced to an i2c daughter board. Interfacing pic microcontroller with i2c lcd mikroc projects. For complete tutorial with circuit diagram and code. Code for dht11 sensor interfacing with pic microcontroller.
Ad7416 connects to the pic16f84 via emulated i2c interface. Mq2 gas sensor interfacing with pic microcontroller. Dec 11, 2017 interfacing pic16f877a microcontroller with esp8266 in this article, let us discuss how to interface wifi module esp8266 with a pic microcontroller. I will make a tutorial to explain how to use i2c with pic soon. I is a bidirectional protocol i2c is a bidirectional protocol. After a start frame signal has been issued the microcontroller must transmit. Program sends data to eeprom data is written at address 2. C from eeprom and send its value to portb, to check if the cycle was successful see the figure below how to interface 24c02 to pic. The reason is both i2c and spi communications are advantages in its own ways and hence is application specific. Functional description of pic16f877a functions and. Actually you need to read the datasheet of hd44780 lcd driver used in this lcd module to write a hitech c program for pic. Read the i2c protocol guide for more information on i2c. Data can flow in any direction on the i2c bus, but when it flows is controlled by the master device.
Oct 19, 2018 interfacing lcd display with pic microcontroller requires at least 6 data pins for lcd pins. For the rest of this article, i will cover how to implement the spi protocol in pic microcontrollers. We will look at the working of the display, the hardware setup and programming with pic16f877a. As the process of writing executable code was endlessly tiring, the first higher programming language.
Look for details about i2c in datasheet and check which registers have to. We have it tested and working on 8051, avr, pic and arm. You use four main component in your this i2c tutorial e. Check the datasheet for which pins are used for i2c and set the appropriate tris bits. The i2c bus is a simple, twowire connection that can link multiple. Wiring up an i2c based eeprom to the i2c port is relatively simple. Interfacing led and switch with pic16f877a tutorials. In the vast system of embedded applications, no microcontroller can. But, when it comes to hardcore embedded system projects we should. It is normally denoted as i2c or i squared c or even as 2wire interface protocol twi at some places but it all means the same. Read the spi protocol guide to know more about spi. Pic16f877a introduction microcontroller pic16f877a is one of the picmicro family microcontroller which is popular at this moment, start from beginner until all professionals.
As for pic microcontrollers the programming words of which are comprised of 14 bits, the instruction set has 35 different instructions in total. I 2 c uses two bidirectional open drain data lines, serial data sda and serial clock scl with pull up resistors as shown below. Microcontroller boardsread, write and erase eeprom by using i2c in pic16f18f primer board. But we solved this problem by creating a header file lcd. Pic mcu is connected scl, sda pins to 24c02 eeprom. The pic16f877a mssp, which is responsible for both i2c and spi, allows only up to 400 khz on the i2c bus which is the fastmode rate.
So my quietion is can i simulate the same code using only eeprom 24lc256 interfacing with picwithought using i2c debugger. But now, why do we need spi protocol when we already have i2c. Feb 20, 2017 this tutorial will be an interesting one because we will learn how to interface 16. The microcontroller clock is generated by an external 10mhz crystal. In fact the fastest i2c mode, ultra fast, can reach only up to 5 mhz while some spi busses can reach 50 mhz. I am using pic16f877a chip and in this tutorial we will cover the software part and the actual hardware will be covered in the upcoming tutorials. Wiring up an i2c based rtc to the i2c port is relatively simple. Interfacing led and switch with pic16f877a in this tutorial we will see how to configure the pic gpios pins and then control the leds using the switches in this tutorial we will be using pic16f877a as reference, same will be applicable for other pic series controllers.
The pic16f877a features 256 bytes of eeprom data memory, self programming, an icd, 2 comparators, 8 channels of 10bit analogtodigital ad converter, 2 capturecomparepwm functions, the synchronous serial port can be configured as either 3wire serial peripheral interface spi or the 2wire interintegrated circuit i. I2c lcd driver for ccs pic c compiler simple projects. A usart universal synchronous asynchronous transmitter receiver rs232 interface. The resistor r1 is used for giving the contrast to the lcd. Pricing and availability on millions of electronic components from digikey electronics. Interfacing pic16f877a microcontroller with esp8266 in this article, let us discuss how to interface wifi module esp8266 with a pic microcontroller. I2c communication with pic microcontroller pic16f877. This post shows how to interface pic microcontroller with i2c lcd using ccs c compiler where a driver library will be used to simplify the interfacing source codes for further project. The rtc also makes the software easier as it takes care of all calendar functions. Interfacing 16x2 lcd with pic microcontrollers mplab xc8. I am using pic16f877a microcontroller in this tutorial. The devices consist of eight quasibidirectional ports, 100 khz i2c bus interface, three hardware address inputs and interrupt output operating between 2. Section 5 describes how the two, 8bit bytes sent to it need to be structured. The devices consist of eight quasibidirectional ports, 100 khz i2cbus interface, three hardware address inputs and interrupt output operating between 2.
The data sheet for the 24c16 eeprom well experiment with says the. In this tutorial we will see how to write data to an lcd with pic microcontroller. The capacitor c2 and c3 will act filters to the crystal oscillator. How to interface i2crtc with pic16f877a pic advanced. If you have any other sensors in mind which you use frequently and would like to have a tutorial for that, list them below it will be of great use to me. Jun 25, 2018 the i2c lcd is connected with the microcontroller via 2 lines. In this tutorial, i will show you how to interface dht11 humidity sensor with pic microcontroller and how to measure temperature and humidity with dht11 sensor. We have already learnt i2c communication with pic and so we must be familiar with how i2c works and where we can use them like i2c can be used to interface rtc module. The i2c lcd is connected with the microcontroller via 2 lines. You should also check that the analogue functions for the same pins is disabled ansel register.
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