PIC receive/transmit data

[valo]

hi all..

im a super newbie in microcontroller..

consider i have a rs232 device to be connected to PIC. thats mean the data flow through UART. the also PIC connected to PC ,also via UART (serial port). i wanna use an LCD which its output based on the data that have been send back by PC. what are the steps?

another question, is it possible that if i store password in the PIC, the rs232 device will enabled only if i entered correct password?

[ober]

im a super newbie in microcontroller..

consider i have a rs232 device to be connected to PIC. thats mean the data flow through UART. the also PIC connected to PC ,also via UART (serial port). i wanna use an LCD which its output based on the data that have been send back by PC. what are the steps?

another question, is it possible that if i store password in the PIC, the rs232 device will enabled only if i entered correct password?

welcome to Cytron technical forum. Seem to me that you are not newbie from the questions you asked. Since you need to interface with 2 devices that require UART, to make your programming straight forward you need to choose microcontroller that come with 2 or more UART peripheral. Alternatively, you could refer to PR27 which uses software to create what we called virtual UART.

I would advice to start your project with simple target, try to display message on LCD and interface with your RS232 device, then to your computer.

Hope that helps.

[shahrul]

Ober have answered the question.

another question, is it possible that if i store password in the PIC, the rs232 device will enabled only if i entered correct password?

For this, yes you can store a password in the PIC EEPROM.

[robosang]

Ya Start with the simple target, then slowly move to advance project..... save you a lot of time and money. Learn a lot too.

Yup, shahrul is right, you can actually save the data in EEPROM, PIC16F877A has 256 bytes of internal EEPROM which be written and read during program execution. Hi-Tech C Compiler should come with the library.

[nicholaswsw]

I have an question to ask as well say i'm using the 315Mhz and 433Mhz RF module and i want to connect it to PIC 16F877A. In this case i have to use 2 Tx and Rx Pins, are there any solutions to this issue? I was thinking of Multiplexing but then which IC to use, or there are other solutions?

[ober]

I have an question to ask as well say i'm using the 315Mhz and 433Mhz RF module and i want to connect it to PIC 16F877A. In this case i have to use 2 Tx and Rx Pins, are there any solutions to this issue? I was thinking of Multiplexing but then which IC to use, or there are other solutions?

I don get you good? help me here.

Why you need 2 Tx and Rx pin?

[nicholaswsw]

I'm using a Barcode Scanner with a RS-232C connection and i want to connect it to my PIC. And i'm using Zigbee to communicate with the another PIC so 1 Tx,Rx pins for the Rs232 and another Tx,Rx pin for the Zigbee Module

[ober]

Now I get more confuse Previous post you are talking about RF module, now you talk about ZigBee....

Anyway from your description, you should need 2 Rx and 1 Tx. You can either find yourself a PIC that come with 2 UART engine or write a software UART as shown in one of Cytron DIY project, PR27

[nicholaswsw]

I'm a newbie here... I just want to ask 16F877a it's a 8 bit microcontroller, and Zigbee uses 16 bit addressing. Can I connect the two of them together?

[yonghui]

hi,

the 8bit microcontroller can be used to control the zigbee. no problem.