This is just a basic demo, the programs are not implemented 100% correct, they are not intended to be re-used somewhere else.
Just do a make to compile the programs. wiringPi library is required. spidev has to be enabled on RPi.
Start dut first, then tia. tia can be run multiple times without stopping dut.
Performs 10000 measurements, each less than 500ns (measurement mode 1 of TDC7200).
For each measurement:
- starts measurement (writes to config1) (which automatically sets TRIGG to 1)
- waits for INTB to be 0
- calculates the time interval and stores the result
After all the measurements, statistics are calculated and displayed.
Example output:
$ ./tia
# of measurements: 10000
mean: 31.75 ns
sigma: 4.26 ns
min: 7.82 ns
max: 227.36 ns
median: 34.59 ns
Constants, all hardcoded in tia:
- CLOCK is 5 MHz.
- spidev is /dev/spidev0.0.
- SPI speed is 2 MHz.
In an infinite loop, waits for TRIGG to be 1 and then:
- sets START to 1
- sets STOP to 1
- sets START to 0
- sets STOP to 0
TDC7200 is mounted on a DIP adapter and on a breadboard.
