Pic16f690 Serial Communication C Code Tutorial Inverter

I'm trying to incorporate a PIC chip into my next Arduino project so that I can send serial data back and forth between the two. I'm using the PIC16F690 that comes with the PICkit2 programmer/Low Pin Count demo board from Microchip. The first step is trying to figure out how to get serial data out of the PIC. Right now I'm just using the Arduino as a USB serial interface. It should just pass any serial data it gets over to the serial monitor inside the IDE. The following code is for that.

Does this look correct? Code: Good to go!

110000 10000 and so on. The '11' at the end of the second line is noise from where I plug the PIC into the arduino.

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This UART code for PIC will work on most UART circuits. When a byte is received on UART, it is displayed on LEDs (Ascii value) and returned on serial port.

I remove it when I'm programming the arduino because I'm scared it'll fry the PIC somehow. So the question is: Why isn't the output on the lines after the first two correct? The incoming serial data should be the same.

Do I need a hex inverter on the PIC chips output for the serial data to be correct? Inverting the output in the PIC code didn't seem to work. Or does it have to do with some difference between CMOS and TTL that I'm missing? Any help on this would be great. I'll write up a little tutorial for it if I get it working.

One of the most commonly used and easy to use protocol in serial communication is USART. It is the abbreviation for Universal Synchronous Asynchronous Receiver Transmitter. It is the commonly used asynchronous communication protocol and available in vast variety of devices. For example, GSM modems, GPS modems, sensors etc. Advantage of asynchronous communication is it doesn’t need a clock for syncing data between two devices. RS-232 The computer has serial port which uses RS-232 interface standard and it is one of most reliable communication standard using UART protocol.

RS-232 voltage levels are different from TTL levels and a voltage level converter is need when interfacing with PIC Microcontroller board. Interfacing PIC Microcontroller have inbuilt UART module which is very easy to interface. There are two pins for UART module, TX, transmitter and RX, receiver. When interfacing to other devices, Tx will be connected to Rx of the other device and Rx will connect to Tx. Both device should share a common ground, otherwise they will misbehave. Baud rate Baud rate is the number of bits transmitting or receiving be second, commonly denoted in bps (bits/sec). It determines the speed of the transmission.