Embedded Files
Digital Clock
Digital Clock
Introduction/Objective
Introduction/Objective
The purpose of this project is to design is a digital clock capable of keeping time and displaying that time with hours and minutes
Design Goals:
- Implement the features of a real life digital clock:
- 24 hour time function (HH MM SS)
- Clock settings
- Alarm time settings
- Alarm indicating LED (possible sound output)
- Random number generator for alarm (If group has time before deadline)
Design
Design
Like, the previous lab assignments, this project was completed using the Digilent Nexys 4 DDR FPGA Trainer Board. The following input/outputs were used for this design: a on board 50 MHz crystal oscillator clock, slide switches, four momentary-contact push button switches, two individual LED’s, and a four-character, seven-segment display. Please see the reference manual for the board for further readings https://reference.digilentinc.com/reference/programmable-logic/nexys-4-ddr/reference-manual
List of Inputs:
List of Inputs:
- Slide Switches:
- Alarm Mode/Clck Mode sw[0]
- Clock ON/OFF sw[7]
- Reset
- Time Set
- Hours
- High digit: sw[8] && sw[2]: deactivate sw[8] to set high digit and continue onto the counter for lower digit
- Low digit: deactivate sw[2] when the counter reaches desired number
- Minutes:
- High digit: sw[8] && sw[1] on: deactivate sw[8] to set high digit and continue on to counter for low digit
- Low digit: deactivate sw[1] when counter reaches desired number
- Seconds sw[7]
- Must time the seconds timer with current time
- Hours
List of Outputs:
List of Outputs:
- Seven-Segment Display
- Indicator LED
- Alarm on/off indicator
- Blinking Board mounted second indicated LED’s
- Alarm Alert ( LED / Sound)
Testing
Testing
The testing for this project was accomplished using the hardware. The implementation involved synthesis of the VHDL code, followed by generating a bit file using Xilinx. For full utilization the FPGA board was implemented using the Jport to connect to the laptop.
Results
Results
The proposed design discussed above was able to partially be implemented successfully. The group was able to use the hardware and output a clock with some of the design goals stated above. The clock has hours, minutes, and seconds, utilizing the LED display. It is capable of using all six digits of the seven-segment display. The group was successfull in terms of creating a fully functional clock. The only thing interfering with the success of this project is some technical difficulties with the board. There is an occasional freeze in the clock when too many buttons are used at once. Most likely, this is due to unintentional signals generated by a noisy digital contact as the switch is pressed. However, the clock still functions as desired.
Difficulties
Difficulties
Some Clock Functions On Video
Some Clock Functions On Video
IMG_4450.movSecond Increment
Second Increment
IMG_4451.movMinute Increment
Minute Increment
IMG_4452.movHour Increment
Hour Increment
IMG_4455.MOVSetting Hour
Setting Hour
IMG_4454.MOVSetting Minute
Setting Minute
Take Aways
Take Aways
Code to Hardware Relationship
- A greater understanding of how VHDL code is describing and implementing hardware design. It was difficult throughout this project even the semester to understand that VHDL is not like other sequential data programming languages.
- Implementation of constraint file, input buffers, and output buffers were completed
FPGA Board
- Further gained knowledge on the FPGA board’s display
- sending digit signals to the 7-segment decoder
- Understanding of how to implement the FPGAs internal clock as an entity into design
Page updated
Report abuse