Comunicacion Serial Rs232 En Ccs
Hello Friends! In this tutorial I will discuss how to practically do a simple communication over RS232 interface. For those who are completely new to this I clarify that the motive is to send and receive data between two device using a standard called RS232. RS232 is serial interface that means that data is. Asynchronous serial communication is widely used for communicating with external devices like PC/Laptops,GSM modems,GPS modules etc.It also forms the basis for many standard protocols like RS232,RS422,RS485 etc. You can see the (very) simplified block diagram of USCI_A0 in UART mode below. I tried to communicate with my laptop by connecting USB to Serial converter(i checked it.it's working) and my demo board for 16F876A. Im using CCS C compiler to coding. I need to send. Without seeing your complete program odds are real good you need to add 'errors' to the use rs232(.options.
Comunicacion Serial Rs232 En Ccs
I have a PIC 16F887A connected to the serial port. I want it to lit a green led when it receives 0x01 and lit a red led when it receives 0x00 from pc. I send the characters from a C# windows forms application, the PIC itself is programmed with CCS C. Can you please tell me what i'm doing wrong as the codes below don't work?
Elementos del estilo tipografico robert bringhurst pdf to word gratis. Edit: By doesn't work i mean it lits the red led in both cases.
C# Code
CCS C Code
1 Answer
If it receives 0x00 in both cases, it is likely that you have a baud rate mismatch, even a slight one. After detecting a start bit, the PIC might be seeing the first 7 zeroes and think it saw 8, going you 0x00 in both cases. I would try transmitting from the PIC and PC and watching the lines on a scope to ensure they are running the same speed. You can also try continuously transmitting 0xAA to get an eye pattern (10101010) and comparing the two signals.
