open-ameba/RTL00_SDKV35a/example_sources/gpio_pulse_measure/readme.txt

14 lines
469 B
Text
Raw Normal View History

2016-12-14 01:21:37 +00:00
Example Description
This example describes how to use GPIO read/write mbed api to generate a pulse and to measure the pulse width.
Requirement Components:
a wire
Pin name PC_4 and PC_5 map to GPIOC_4 and GPIOC_5:
- PC_4 as the interrupt GPIO pin with no pull (High-Z).
- PC_5 as output to generate a pulse.
- Use a wire to connect PC_4 and PC_5
In this example, the UART consol will print out the measured width (in us) of the pulse which generated by PC_5.