Charles Tritt
/
TimerTest2
Reports the difference between two successive timer read_us calls.
main.cpp
- Committer:
- CSTritt
- Date:
- 2017-09-20
- Revision:
- 1:b491e7f40a84
- Parent:
- 0:7931706dde3d
File content as of revision 1:b491e7f40a84:
/* Project: TimerTest2 File: main.cpp Tests timer peformance. Display new time difference with each button press and release. Differences of 1 or 2 microseconds are typical. Last modified 9/17/17 by C. S. Tritt (v. 1.0) */ #include "mbed.h" // Construct a USER_BUTTON digital input. DigitalIn myButton(USER_BUTTON); // Construct a timer object. Timer myTimer; // Construct a transmit only serial connection over our USB. Serial pc(USBTX, NC, 9600); int main() { myTimer.start(); // Start the timer. while(true) { // Main loop. if (myButton == 0) { // Button is pressed (active low). // Save the time on timer. int firstTime = myTimer.read_us(); int secondTime = myTimer.read_us(); // Send the time as text via the serial port. pc.printf("Time difference %i microseconds.\n", secondTime - firstTime ); // Reset the timer. myTimer.reset(); // Wait for the user to release the button. while(myButton == 0) { } } } }