Description
In this lab you will use a lookup table (LUT) implemented using a memory elements to convert Morse code patterns of dots and dashes into ASCII code. The outputted ASCII codes will be pushed into a FIFO buffer and displayed on the seven-segment display
- Implement the system shown in the figure on the FPGA board
- The red OR gate resets the 5-bit shift register and the 3-bit UDL counter after each letter (or word)
- wg_delayed is necessary to push a space at the end of a word (i.e. after a wg)
- Figure out the width and depth of the ROM and FIFO buffer interface
- Use the included xlsx to figure out the initial values of ROM
- You can use your Morse Decoder or the decoder I provided in the starter code. However, if you decided to use mine, please keep in mind: o The decoder was designed using a single timer/counter structure
- The functionality of the decoder depends on knowing when to reset, enable, and disable the timer/counter structure
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- You can change the timer value by changing the TIMER_FINAL_VALUE parameter
- Generating a wg signal doesn’t mean lg will also be generated o I have tested my decoder; however, I might have missed some corner cases (i.e.
use it at your own risk)
Note:
I used the binary tree shown above to fill out the lookup table in the excel sheet. To get the letter associated with a certain code, move right for a dash and left for a dot.
