ftm_pwm_twochannel#
Overview#
The FTM pwm two channel Example project is a demonstration program that uses the KSDK software to generate a square pulse PWM(24kHZ) on 2 channel to control the LED brightness. It sets up the FTM hardware block to output two edge-aligned PWM signals. The PWM dutycycles are periodically updated.
FTM generates a PWM with the increasing and decreasing duty cycle.
LED brightness is increasing and then dimming. This is a continuous process. The user should probe the FTM output with a oscilloscope to see the PWM.
Supported Boards#
FRDM-K22F
Hardware requirements
Mini/micro USB cable
FRDM-K22F board
Personal Computer
Board settings
This MPU Example project does not call for any special hardware configurations. Although not required, the recommendation is to leave the development board’s jumper settings and configurations in default state when running this example.
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
These instructions are displayed/shown on the terminal window:
FTM example to output PWM on 2 channels
You will see a change in LED brightness if an LED is connected to the FTM pin
If no LED is connected to the FTM pin, then probe the signal using an oscilloscope
FRDM-KE02Z40M
Hardware requirements
Mini/micro USB cable
FRDM-KE02Z40M board
Personal Computer
Board settings
No special settings are required. Use oscilloscope to measure output the signal pin at J10-4 pin of board. Use oscilloscope to measure output the signal pin at J10-6 pin of board.
Prepare the Demo
Connect a USB cable between the host PC and the OpenSDA 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 press the reset button on 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:
FTM example to output PWM on 2 channels
You will see a change in LED brightness if an LED is connected to the FTM pin
If no LED is connected to the FTM pin, then probe the signal using an oscilloscope
FRDM-KE15Z
Hardware requirements
Micro USB cable
FRDM-KE15Z board
An oscilloscope
Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Connect a USB cable between the host PC and the OpenSDA 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 press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the example runs successfully, the following message is displayed in the terminal:
FTM example to output PWM on 2 channels
You will see a change in LED brightness if an LED is connected to the FTM pin
If no LED is connected to the FTM pin, then probe the signal using an oscilloscope
FRDM-KE16Z
Hardware requirements
Micro USB cable
FRDM-KE16Z board
An oscilloscope
Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Connect a USB cable between the host PC and the OpenSDA 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 press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the example runs successfully, the following message is displayed in the terminal:
FTM example to output PWM on 2 channels
You will see a change in LED brightness if an LED is connected to the FTM pin
If no LED is connected to the FTM pin, then probe the signal using an oscilloscope
FRDM-KE17Z
Hardware requirements
Micro USB cable
FRDM-KE17Z board
An oscilloscope
Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Connect a USB cable between the host PC and the OpenSDA 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 press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the example runs successfully, the following message is displayed in the terminal:
FTM example to output PWM on 2 channels
You will see a change in LED brightness if an LED is connected to the FTM pin
If no LED is connected to the FTM pin, then probe the signal using an oscilloscope
FRDM-KE17Z512
Hardware requirements
Micro USB cable
FRDM-KE17Z512 board
An oscilloscope
Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Connect a USB cable between the host PC and the MCU-LINK 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 press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the example runs successfully, the following message is displayed in the terminal:
FTM example to output PWM on 2 channels
You will see a change in LED brightness if an LED is connected to the FTM pin
If no LED is connected to the FTM pin, then probe the signal using an oscilloscope
FRDM-MCXE247
Hardware requirements
USB-C cable
FRDM-MCXE247 board
An oscilloscope
Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Connect a USB cable between the host PC and the MCU-LINK 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 press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the example runs successfully, the following message is displayed in the terminal:
FTM example to output PWM on 2 channels
You will see a change in LED brightness if an LED is connected to the FTM pin
If no LED is connected to the FTM pin, then probe the signal using an oscilloscope
LED (red and green components) will change brightness.
LPCXpresso860MAX
Hardware requirements
Micro USB cable
LPCXpresso860MAX board
An oscilloscope
Personal Computer
Board settings
The FTM Pins are J1_5 and J1_7.
Prepare the Demo
Connect a micro USB cable between the PC host and the OpenSDA USB port on the board.
Open a serial terminal on PC for OpenSDA serial device with these settings:
9600 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 demo.
Running the demo
These instructions are displayed/shown on the terminal window:
FTM example to output PWM on 2 channels
You will see a change in LED brightness if an LED is connected to the FTM pin
If no LED is connected to the FTM pin, then probe the signal using an oscilloscope