lpit_pwm#
Overview#
This demo show how to use SDK drivers to implement the PWM feature by LPIT IP module in dual 16-bit Periodic counter mode,and clone by TRGMUX to output this PWM to TRGMUX_OUTx pin. By default,the pwm duty is 50%, user can input from terminal to change the period and duty cycle,use oscilloscope can measure this output PWM signal.
Supported Boards#
MIMXRT1180-EVK
Hardware requirements
Micro USB cable
MIMXRT1180-EVK board
Personal Computer
Board settings
No special is needed. Use oscilloscope to measure output the 1000Hz PWM signal pin at J44-6 pin of board,you can also change pwm frequency and duty via terminal.
Prepare the Demo
Connect a USB cable between the PC host and the OpenSDA USB port on the board.
Open a serial terminal with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the example.
Running the demo
When the example runs successfully, you can see the PWM signal wave on oscilloscope and similar information from the terminal as below.
lpit pwm demo start.
Please input pwm frequency and duty:
FRDM-KE15Z
Hardware requirements
Mini/Micro USB cable
FRDM-KE15Z board
Personal Computer
Board settings
No special is needed. Use oscilloscope to measure output the 1000Hz PWM signal pin at J4-4 pin of board,you can also change pwm frequency and duty via terminal.
Prepare the Demo
Connect a USB cable between the PC host and the OpenSDA USB port on the board.
Open a serial terminal with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the example.
Running the demo
When the example runs successfully, you can see the PWM signal wave on oscilloscope and similar information from the terminal as below.
lpit pwm demo start.
Please input pwm frequency and duty:
FRDM-KE16Z
Hardware requirements
Mini/Micro USB cable
FRDM-KE16Z board
Personal Computer
Board settings
No special is needed. Use oscilloscope to measure output the 1000Hz PWM signal pin at J4-10 pin of board,you can also change pwm frequency and duty via terminal.
Prepare the Demo
Connect a USB cable between the PC host and the OpenSDA USB port on the board.
Open a serial terminal with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the example.
Running the demo
When the example runs successfully, you can see the PWM signal wave on oscilloscope and similar information from the terminal as below.
lpit pwm demo start.
Please input pwm frequency and duty:
FRDM-KE17Z
Hardware requirements
Mini/Micro USB cable
FRDM-KE17Z board
Personal Computer
Board settings
No special is needed. Use oscilloscope to measure output the 1000Hz PWM signal pin at J1-5 pin of board,you can also change pwm frequency and duty via terminal.
Prepare the Demo
Connect a USB cable between the PC host and the OpenSDA USB port on the board.
Open a serial terminal with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the example.
Running the demo
When the example runs successfully, you can see the PWM signal wave on oscilloscope and similar information from the terminal as below.
lpit pwm demo start.
Please input pwm frequency and duty:
FRDM-KE17Z512
Hardware requirements
Mini/Micro USB cable
FRDM-KE17Z512 board
Personal Computer
Board settings
No special is needed. Use oscilloscope to measure output the 1000Hz PWM signal pin at J1-5 pin of board,you can also change pwm frequency and duty via terminal.
Prepare the Demo
Connect a USB cable between the PC host and the MCU-LINK USB port on the board.
Open a serial terminal with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the example.
Running the demo
When the example runs successfully, you can see the PWM signal wave on oscilloscope and similar information from the terminal as below.
lpit pwm demo start.
Please input pwm frequency and duty:
FRDM-MCXE247
Hardware requirements
USB-C cable
FRDM-MCXE247 board
Personal Computer
Board settings
No special is needed. Use oscilloscope to measure output the 1000Hz PWM signal pin at J4-12 pin of board, you can also change pwm frequency and duty via terminal.
Prepare the Demo
Connect a USB cable between the PC host and the MCU-LINK USB port on the board.
Open a serial terminal with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the example.
Running the demo
When the example runs successfully, you can see the PWM signal wave on oscilloscope and similar information from the terminal as below.
lpit pwm demo start.
Set default PWM output
Frequency: 1000Hz
Duty Cycle: 50%
Please input PWM frequency and duty like: 1464 50
The valid PWM frequency is 732Hz to 24000000Hz
FRDM-IMXRT1186
Hardware requirements
Micro USB cable
FRDM-IMXRT1186 board
Personal Computer
Board settings
Change Jumper J35 from 1-2 to 2-3. Use oscilloscope to measure output the 1000Hz PWM signal pin at J51-10 pin of board,you can also change pwm frequency and duty via terminal.
Prepare the Demo
Connect a USB cable between the PC host and the OpenSDA USB port on the board.
Open a serial terminal with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the example.
Running the demo
When the example runs successfully, you can see the PWM signal wave on oscilloscope and similar information from the terminal as below.
lpit pwm demo start.
Please input pwm frequency and duty:
IMX943-EVK
Hardware requirements
Micro USB cable
MIMXRT1180-EVK board
Personal Computer
Board settings
No special is needed. Use oscilloscope to measure output the 1000Hz PWM signal pin at J48-10 pin of board,you can also change pwm frequency and duty via terminal.
Prepare the Demo
Connect a USB cable between the PC host and the OpenSDA USB port on the board.
Open a serial terminal with these settings:
115200 baud rate
8 data bits
No parity
One stop bit
No flow control
Download the program to the target board.
Either press the reset button on your board or launch the debugger in your IDE to begin running the example.
Running the demo
When the example runs successfully, you can see the PWM signal wave on oscilloscope and similar information from the terminal as below.
lpit pwm demo start.
Please input pwm frequency and duty: