how to read frequency of Din0

[tbraux]

Hi
for a personnal project, i need to read the frequency of the signal on input Din0, and update that value every 250 ms.
any idea how to do that ?
thanks

[M.Maidhof]

Hi,

which frequency range do you want to measure?

regards

Michael

[tbraux]

from 0 to 1.1 kHz
that is a speed information, 27.5 Hz = 1 km/h
I need up to 40 km/h

[M.Maidhof]

Hi,

the digital inputs of the PCAN-Router FD are designed to read only low frequencies (low pass filter included). The Din0 is linked to MicrocController (NXP LPC4078) P1.14 which can be used with Timer2 Cap0 for such an application. We don't have any code available to read frequencies with that port, but it should be possible. You have to use timer 2 and the capture input to trigger the signal. See MicroController datasheet for more details.

regards

Michael

[tbraux]

it works ! thanks for the help.