Matrix user forums

Hello all;
I have completed the small project. Everything is working the way I planned. If you have any questions, let me know. Here is the youtube link: http://youtu.be/4UQUBb8BuvU

Best wishes,
Khan Alim

hello, I have written the first program that only reads value from DS1307 and display it in LCD. But when it runs, I see following information and does not change. Time 45/0/0 Date S 45/25/165 I am attaching my flowcode file here, if anyone can help me to fix the problem. Thanks in advance. Khan Alim

Hello, I like to share more information about writing data in RTC. At first one need to send RTC address+0 in expression of I2C component macro. You need one variable to return value for acknowledgement. Second you need to send '0' in order to set pointer of DS1307 register. This information is very...

Hello, Before writing the final code, I want to share few information from Real Time Clock (RTC) DS1307 data sheet. After reseting the RTC, the registers are typically set to 01/01/00 01 00:00:00 which refers to MM/DD/YY DOW HH:MM:SS Time keeping registers (of RTC) are located from 00h to 06h. In 00...

Jorgen,
I understand. Thank you though. I looked at few programs in that link and I wrote a small program to write time information in DS1307. This is not a whole program to write and read in Real Time Clock (RTC). I am sharing my program here to get some feedback.

Thanks in advance.

Hi Jorgen and all,
I looked at your link and found lot of information. Enamul uploaded a file for RTC, I am uploading that file here too. I was lost in RTC_INIT macro. Can anyone explain it to me? Specially, the functions of "send byte, expression" in MI2C function are very confusing to me.

Jorgen,
Thank you! Looks like a very good link. I will come up with more questions when I face any issue.

Hi, I am trying to interface real time clock (RTC, i.e. DS1307) with PIC16F877A. I want microcontroller to read the data from RTC and display it in LCD. I also want to add six input switches with microcontroller so that user can modify the data in RTC. I am adding six switches in port A. LCD will be...

Thanks for your reply. It is difficult to learn by looking at only data sheet. But this forum is very helpful.

Hello, I am using PIC18F458 microcontroller. I am trying to design a small network using CAN bus. I read the microcontroller data sheet and I learned that RB3/CANRX and RB2/INT2/CANTX are two bus for data transmission. My understanding is that we need only two bus for data transmission and reception...

Pete,
Thank you for your response. I do not have CAN module with me. So, I have to wait until I get it. Or I will find other microcontroller where CAN module is available.

Hi Pete, Thank you for your post. I understand that one can run many CAN module in one network. I am using PIC16F877A microcontroller. I looked at data sheet and could not find CAN features over there. So, should I assume that CAN is different module that I have to acquire separately for my circuit?...

Hello, I have used VNET video tutorial from this website. I completed the tutorial and came up with few questions. First, when I send '0' from buffer, I see 85 in receiver side (as you seen in tutorial). When I send either '1' or '2' ;I see '9' on receiver side. I do not understand why? Second, I co...

Jorgen,
Thanks for your time and for your post. I actually found that in my transmitter side, microcontroller was not sending anyting in pin25 (Tx). So, I made changes there and finally solved the problem of serial data transmission. You can see the link here: http://youtu.be/S4A_3iyDJdg

Hello, I have made some progress on this project (i.e. serial data transfer). I have tested keypad and LCD panel. Both of them work fine. You can watch youtube link here: http://youtu.be/fEMW8hGGJdY But main program that I am trying to develop is still not working. Let me explain what I am trying to...

One more question in this area. When I used port B for keypad input. Does it have internal pull up resister? If there is an internal pull up, I do not need to add external resistor in the breadboard. I am adding a picture of keypad connection here. I have changed many times from row to column, colum...

Thanks!! I understand.

I have couple of questions although I am not sure this is the right forum or not. 1. I tried to connect a keypad in port A (I am using PIC16F877A). I found last two rows could not be connected. When I connect port B, everything (all column and row) connects fine. Why? 2. In order to connect keypad (...

Very good advice regarding length. I will keep this information in mind. Thank you!!

Dazz, I have seen that. Thanks again. Correct me if I am wrong, I have looked at the data sheet and found following information: 1. According to page 7 of data sheet, if I move jumper from default to Patch, I can use P1 side pins (i.e. BIT0, BIT1, BIT2, BIT3, RS and E) for connecting this LCD board ...

Thanks a lot!!

somehow I could not find it from this website.

Hello, I have an E-block (i.e. LCD board, EB-005-00-3). I am building a circuit for micrcontroller in the bread board and I am trying to use it. I have attached a picture for you to see. One can see there are 16-pins outside. I think I can use these pins for connecting this LCD board in a breadboard...

Thank you!!

Hi, I am trying to build a microcontroller circuit where I want to read a keypad and transmit the data using serial transmission. Also I want to read this data from another board and display the data there. In this process, I have built my first program that is supposed to read keypad and send data ...

This questions probably was too complicated to answer. I actually found answer of my question. I simply have to read the datasheet of the micrcontroller first that I am going to use for serial communications. As a simple test, I am going to read a character from a keypad and I can transmit that char...