Serial communication in pic16f877a

First, the xc. You can get detailed instructions on setting up configuration bits here. After this, we will wait till the TXIF bit is set to ensure the transaction is complete. Before leaving the function, TXIF is made 0 again.

To ensure the data is completely received, we will wait till RCIF bit is set. Full-Duplex mode is useful for communications with peripheral systems, such as CRT terminals and personal computers. These devices typically do not have internal clocks for baud rate generation and require the external clock signal provided by a master synchronous device. Setting this bit selects High Speed and clearing this bit selects Low Speed baud rates.

You will can see the baud rate calculation later in this article. Setting this bit selects Synchronous mode while clearing this bit selects Asynchronous mode. Bit 6 TX9 : When this bit is set it enables the 9 bit transmission otherwise 8 bit transmission is used. It is used to select master or slave mode in Synchronous mode operation.

A high at this bit indicates that Overrun error has occurred. Bit 6 RX9 : Setting this bit enables 9 bit reception otherwise it will be in 8 bit reception mode. Setting this bit enables serial port and configures RC7, RC6 as serial port pins. The communication mainly happens through the wired connection between the Tx pin of the transmitting controller and Rx pin of the receiving controller Refer datasheet to know the Rx and Tx pin details.

When the data is transmitted , the transmit flag will be set to 1. Checking this flag value can ensure whether transmission was succesfull or not. We can also configure an interrupt whenever this flag is getting set. Similarly Receive flag will be set to 1 when data is received and will be cleared when the data is read.

The following points must be considered when configuring two controllers for serial communication. By Ritesh - February 4, pm Reply. By victor - March 28, pm Reply. By Jankles - January 25, pm Reply.

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