Contents
How to set up UART in PIC microcontroller?
Like all modules (ADC, Timer, PWM) we should also initialize our USART module of our PIC16F877A MCU and instruct it to work in UART 8-bit communication mode. Let’s define the configuration bits and start with the UART initialization function.
How does UART communication between Pic and computer work?
Now let us come to the final part of the Program, the void main (void) function, where we will be toggling a LED through the computer using the UART communication between PIC and computer. When we send a character “1” (from computer) the LED will be turned ON and the status message “RED LED -> ON” will be sent back (from PIC MCU) to the computer.
How does PIC MCU work with PIC microcontroller?
When we send a character “1” (from computer) the LED will be turned ON and the status message “RED LED -> ON” will be sent back (from PIC MCU) to the computer. Similarly we send a character “0” (from computer) the LED will be turned OFF and the status message “RED LED -> OFF” will be sent back (from PIC MCU) to the computer.
What happens when data is received by UART module?
When a data is received by the UART module it picks it up and stores it up in the RCREG register. We can simply transfer the value to any variable and use it. But there might be overlap error or the user might be sending data continuously and we have not yet transferred them to a variable. In that case the Receive flag bit RCIF comes to rescue.
How can I receive data from UART module?
Receiving data using UART: The following function can be used to receive data from the UART module: When a data is received by the UART module it picks it up and stores it up in the RCREG register. We can simply transfer the value to any variable and use it.
Is the baud rate of UART the same as USART?
There is no incoming serial clock signal, so in order to achieve proper communication between the two ends, both of them must be using the same baud rate. The baud rate is the rate at which bits are being sent bps (bits per second). So, is UART and USART are the same?