Data is send through UART GUI window created using python code using the python Tkinter library.RxFIFO Empty flag = 0 (Buffer has data to be read). RxFIFO Empty flag = 1 (Buffer is empty).At Receiver end, there is Rx FIFO Buffer.TxFIFO flag = 0 (Buffer not full – Software can write to Data Register).TxFIFO flag = 1 (Buffer full – Can’t accept more data).After that, the data is sent out(one at a time) from Tx Shift Register. These 8 bits of data from Data Register is passed to Tx FIFO Buffer. At Transmission side, one can write data into UART Data Register (e.g.As we were not able to implement interrupts on KEIL, we simply used the polling method to poll the TxFIFO and RxFIFO flag described as below. By enabling FEN bit of UART Line Control register, we can write upto 16 bytes of data block into data buffer. There is also another 16-byte FIFO buffer to save all the received bytes. FIFO BufferįIFO Buffer has different size in different devices.TI Tiva UART has an internal 16-byte FIFO (first in first out) buffer to store data for transmission. We can even set up a threshold known as trigger level to notify CPU when the level of FIFO passes the threshold. The CPU hence receives less interrupts and is free to do other things. CPU can then transfer these bytes together at its own speed. The FIFO can receive upto 16 bytes of data and then interrupt the CPU. Thus, the concept of FIFO comes into the picture. For e.g., it might happen that the CPU misses reading the data and a new data comes and overwrites, thereby we lose our previous data. This kind of makes the CPU busy handling the UART only and not do other tasks. Thus, every time a byte is sent or received, the CPU is interrupted. The CPU then transfers the byte from the UART buffer to the memory, or writes the buffer with the next byte to send. When we use a 1 byte buffer, every time a byte is sent or received, the CPU gets a UART interrupt. The transmit FIFO is used to hold the data to be written to the serial port and the receive FIFO is used to hold the data received by the serial port. UART have dedicated memory in the form of a FIFO structure on both transmit and receive side. We have made use of a virtual COM port driver in order to communicate between our 2 applications (Python and Keil) by assigning them to 2 separate COM ports. NOTE: Due to unavailability of the board, this project was implemented only through Simulation in Keil µVision 5 Tool. And finally, echoing it back to the host PC.Store it in memory and display it using TExaS Nokia 5110 screen.We will be sending a binary file from our host terminal to the microcontroller using Python application based GUI.We will use busy-wait to synchronize the software with the hardware. It should be capable for serial communication between two devices. The objective of this project is to transfer binary file (.bin) over UART (universal asynchronous receiver/transmitter) using FIFO.
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