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195 Threads found on Lcd hd44780
in JHD162A JHD is the Company Name/etc 162 mean 16x2 but this lcd uses the same controller hd44780
What do you guys think, am I interpreting this right? Yes, I think so. Although I'm using hd44780 compatible displays since decades, I never reached this limit. In addition, the 500 ns cycle time, that you based your timing on, is a specification for a 5V operated hd44780. I guess, that you rather have a 3.3V logic supply with
I hooked up a Hitachi hd44780 based 2x16 lcd with PIC18F2420. Now on the bootup, I should see boxes in the top row (Typical for a hd44780 based lcd). But what I see is 8 boxes in top row and 8 boxes in Bottom row. Is the lcd Blown or something else is wrong? I have attached a snapshot of (...)
lcds with hd44780 controllers are nice, but you can also reuse lcds from old mobile phones. The best place to start is Nokia 3310 lcd which you connect to your micro with only 3-4 wires I think (SPI or IIC is there). The only issue is that you have to run your MCU with 3.3V or use voltage dividers with resistors. (...)
Hello guys! I have problem in my project: "Digital Wave Frequency Counter Using PIC16F877A". Its simulation runs very well but the problem arises when i practically implemented the project in the Lab. There is no output on the lcd instead of the glowing dot matrices whereas the microcontroller is alive as indicated by the status LED :?: The code
Try reading through the board, there are lots of threads/replies on the subject of displaying contents on lcd, read the datasheet of lcd, normally its hd44780. Keep the sample code and datasheet side by side and you will understand the command structure. If you are using C for programming both Hitech and CCS have sample code in their directories.
How can i find Bangla lcd display for making a calculator? Is it available in market or how to convert any lcd to bangla lcd display. ---------- Post added at 11:48 ---------- Previous post was at 11:47 ---------- Plzzz help me....
Hello, I have a system consisted of a SIM300D, PIC16f877A and a hd44780 lcd. I am also writing in CCS compiler. What i am trying to do is, to make a gprs connection with the sim300d and send data from pic. The test code which i am trying to read a response is the following: while(1){ delay_ms(1000); //Print to lcd the
Please check the following code of PIC16F877 with lcd interfaced. ;------------------------------------------------------------------------------------------------------------------------ ; Source code for the PIC16F877A based interfacing with hd44780 based 16x2 lcd. (...)
Hi, Have just built the code ok and it ran straight away on a simulator. Must assume you have something wrong with your simulator or hardware build. Although that routine works fine its more usual to use the lcd in 4 bit mode so you save the 4 i/o lines for other uses.
Some times a character based lcd (hd44780) can pickup noise or lost synchronization with the controller. 1- What do you suggest to protect inputs to prevent from getting unwanted noise (commands, data). 2- If it gets noise and display is garbaged, what can i do to correct it in the controller. I would like to hear you suggestions, thanks.
Hello, i'm trying to initialize an lcd hd44780 using a 16F887 microcontroller but it seems that something is wrong with the code. include temp1 equ h'20' temp2 equ h'21' temp3 equ h'22' org h'0000' nop bsf STATUS,RP0 bcf TRISD,0 bcf STATUS,RP0 bcf PORTD,0 ;stelnei 0 bsf STATUS,RP0 bcf TRISD,1
Hi engr.waqas, When I need 16*4 display, I use the mikroBASIC compiler, which can write data to 16*4 display using the internal lcd_Out() function. Hope this helps. Tahmid.
I think the question title is misleading, you apparently mean interfacing the hd44780 in Verilog, not implementing it? If the project possibly implies designing a hd44780 model for test purposes (you don't clearly tell about this point), it can only apply to the digital part (bus interface and controller) not the analog part (lcd driver). (...)
I'm trying to show big numbers on a 2x16 character lcd. For this i defined custom patterns to form big numbers in the CGRAM. But CGRAM is limited so i tried to load the CGRAM with the number that will be displayed at that moment. For example I'm loading 0 to CGRAM and displaying it than i'm loading 1 to CGRAm and displaying it on another place but
Most lcds have similar setups, take a look at these examples: FPGA4Fun's lcd Tutorial Interfacing hd44780 lcd PDF These should get you rolling.
i am interfacing the DS1621 with 89s52 and displaying it on the hitachi based hd44780 ...16X2 lcd Problem with code i have is not display the value of the temperature .. instead it is showing helloword || %d%s|| centigarde and garbage value .... i want helloworld 30 centigrades so please help me ... i will be so thnkful
Seems that this display uses an hd44780 controller. Now for the commands you've to check the datasheet of the controller, e.g. here:
Hello forum :-) I am working on a project, I am currently trying to get some lcd code attached to drive my lcd, the lcd is hd44780 compatible and the driver is written for it. However, my circuit has a 20Mhz crystal so I think the delays that are defined at the beginning of the code must be incorrect. Could someone (...)
You will need 8 + 3 ports available -- one for each input/output pin of the lcd. I suggest this to start out. Later you can use a serial in/parallel out shift register to send data to the lcd display. Look for Atmel source codes that involve an lcd screen, most will have the same controller chip as your screen. Check out this (...)