Example MPC5744P eTimer frequency measurement GHS614

[#1]

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* Detailed Description:

*

* Example gives possible implementation of input signal period/freq measurement.

* eTimer channel capture 1 and 2 features are used. CAPT1/CAPT2 capture counter

* value on rising/falling edge of input signal. The FIFO is set to 2 entries

* and ICF2 is monitored. Free-running mode is used here.

*

* eTimer channel 0-1 are cascaded to achieve 1sec/1Hz measuring with 32bit counter.

* EVB connection:

*   P8.2  - A[1]  .. eTimer0 channel1 input signal

*   P8.1  - A[0]  .. GPIO output, used to show measurement period

*

*   Route LINFlexD_0 TXD/RXD (PB2/PB3) signals to the main board RS-232 transceiver

*   Daughtercard:

*   J17.11–12 ON  .. Connect LINFlexD_0 TXD (PB2) to main board.

*   J17.8–9 ON .. Connect LINFlexD_0 RXD (PB3) to main board.

*

*   Motherboard

*   J14 - SCI_RX ON

*   J13 - SCI_TX ON

*   J25 - SCI_PWR ON

*

* connect pulse signal to the P8.2.

* See results on PC terminal (19200, 8N1, None).

* Change freq/duty of input signal.

*

* ------------------------------------------------------------------------------

* Test HW:  MPC57xx

* Maskset:  1N65H

* Target :  internal_FLASH

* Fsys:     200 MHz PLL with 40 MHz crystal reference

* Terminal: 19200, 8N1, None

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[Pat]

Hi Petr,

Is it possible to have the same using DMA ?

PetrS

Best regards,

Pat

[PetrS]

Hi Pat

see Example MPC5744P eTimer DMA frequency measurement GHS614

Petr

[Pat]

Hi Petr,

Thank you very much for your help and your support.

Best regards,

Pat

[nxppower912935]

Hi Petr,

could you compile this with S32DS? I see loads of samples using GHS, but as you know GHS is access is expensive. Beside startup code, would it be possible to take sources and integrate them into S32DS demo project? (Note: I haven't tried yet)

Kind regards