lptmr#

Overview#

The LPTMR project is a simple demonstration program of the SDK LPTMR driver. It sets up the LPTMR hardware block to trigger a periodic interrupt after every 1 second. When the LPTMR interrupt is triggered a message a printed on the UART terminal and an LED is toggled on the board.

Supported Boards#

IMX943-EVK

Hardware requirements

Micro USB cable
IMX943-EVK board
J-Link Debug Probe
12V~20V power supply
Personal Computer

Board settings

Connect J43-12 to oscilloscope to capture the trigger signal.

Please note this application can’t support running with Linux BSP!

Prepare the Demo

Connect 12V~20V power supply and J-Link Debug Probe to the board, switch SW1(SYS_PWR) to power on the board.
Connect a micro USB cable between the host PC and the J15(FTDI_DEBUG) USB port on the target board.
Open a serial terminal with the following settings:
- 115200 baud rate
- 8 data bits
- No parity
- One stop bit
- No flow control
Download the program to the target board.
Either re-power up your board or launch the debugger in your IDE to begin running the example.

Running the demo

These instructions are displayed/shown on the terminal window:

Low Power Timer Example
IPSYNC trigger signal connected output!

LPTMR interrupt No.1
LPTMR interrupt No.2
LPTMR interrupt No.3
....................
....................
~~~~~~~~~~~~~~~~~~~~~~~

You will also capture the trigger signal on OSC.

lptmr

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