Stefan Waldschmidt / Mbed OS Test_Interrupt_Response_Time

Test the response time from toggling a GPIO input to setting a GPIO output from the interrupt handler.

Measure the interrupt response time for a GPIO input

This mbed program registers "on rise" and "on fall" interrupt handlers for a GPIO input and drives a different GPIO output to follow the input.

Measurements are performed on a NUCLEO-F767ZI board https://os.mbed.com/platforms/ST-Nucleo-F767ZI/.

mbed-os-5.12.3

  • rising: 1.1 usec - 1.3 usec
  • falling: 1.1 usec - 1.3 usec

/media/uploads/stefanwaldschmidt/mbed-os-5.12.3.gif

OS 2

  • rising: 0.7 usec - 1.2 usec
  • falling: 0.8 usec - 1.3 usec

/media/uploads/stefanwaldschmidt/imag001.gif

Diff: main.cpp

Revision:
3:e4a312a8ad61
Parent:
0:3c3c98b93d93
--- a/main.cpp	Thu May 09 13:43:35 2019 +0000
+++ b/main.cpp	Fri May 10 07:44:18 2019 +0000
@@ -2,9 +2,11 @@
    Test interrupt response time
 
    Hardware: NUCLEO-F767ZI
+   Libraries:
+     mbed-os-5.12.3
    Measured delay between gpio_in and gpio_out
-   * rising:  0.7 usec - 1.2 usec
-   * falling: 0.8 usec - 1.3 usec
+   * rising:  1.1 usec - 1.3 usec
+   * falling: 1.1 usec - 1.3 usec
 */
 
 #include "mbed.h"