sctimer_pwm_with_dutycyle_change#
Overview#
This SCTIMer project is a demonstration program of the SDK SCTimer driver’s PWM generation. It sets up a PWM signal and periodically updates the PWM signals dutycycle.
Supported Boards#
EVK-MIMXRT595
Hardware requirements
Micro USB cable
EVK-MIMXRT595 board
Personal Computer
Board settings
No special settings are required.
Connect a micro USB cable between the PC host and the CMSIS DAP USB port (J40) on the 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.
Launch the debugger in your IDE to begin running the demo.
Running the demo
The log below shows example output of the SCTimer driver PWM demo in the terminal window:
SCTimer example to output center-aligned PWM signal
You will see a change in LED brightness if an LED is connected to the SCTimer output pin
If no LED is connected to the pin, then probe the signal using an oscilloscope
Observe the red led to see the SCTimer pwm signal.
EVK-MIMXRT685
Hardware requirements
Micro USB cable
EVK-MIMXRT685 board
Personal Computer
Board settings
No special settings are required.
Connect a micro USB cable between the PC host and the CMSIS DAP USB port (J5) on the 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.
Launch the debugger in your IDE to begin running the demo.
Running the demo
The log below shows example output of the SCTimer driver PWM demo in the terminal window:
SCTimer example to output center-aligned PWM signal
You will see a change in LED brightness if an LED is connected to the SCTimer output pin
If no LED is connected to the pin, then probe the signal using an oscilloscope
Observe the green led to see the SCTimer pwm signal.
FRDM-MCXN947
Hardware requirements
Type-C USB cable
FRDM-MCXN947 board
Personal Computer
Board settings
Output signal Board location
SCT0_OUT4 J3-3 (P1_22)
Prepare the Demo
Connect a type-c USB cable between the PC host and the MCU-Link USB port (J17) on the board
Open a serial terminal with the following settings (See Appendix A in Getting started guide for description how to determine serial port number):
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
The log below shows example output of the SCTimer driver PWM demo in the terminal window:
SCTimer example to output center-aligned PWM signal
You will see a change in LED brightness if an LED is connected to the SCTimer output pin
If no LED is connected to the pin, then probe the signal using an oscilloscope
You’ll see PWM signals with changing duty cycle on J3_3 using an oscilloscope.
FRDM-MCXN947T
Hardware requirements
Type-C USB cable
FRDM-MCXN947T board
Personal Computer
Board settings
Output signal Board location
SCT0_OUT4 J3-3 (P1_22)
Prepare the Demo
Connect a type-c USB cable between the PC host and the MCU-Link USB port (J17) on the board
Open a serial terminal with the following settings (See Appendix A in Getting started guide for description how to determine serial port number):
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
The log below shows example output of the SCTimer driver PWM demo in the terminal window:
SCTimer example to output center-aligned PWM signal
You will see a change in LED brightness if an LED is connected to the SCTimer output pin
If no LED is connected to the pin, then probe the signal using an oscilloscope
You’ll see PWM signals with changing duty cycle on J3_3 using an oscilloscope.
FRDM-MCXW23
Hardware requirements
Type-C USB cable
FRDM-MCXW23 Board
Personal Computer
Board settings
Output signal Board location
SCT0_OUT5 J2-7
Prepare the Demo
Connect a USB cable between the host PC and the FRDM board J10.
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
The log below shows example output of the SCTimer driver PWM demo in the terminal window:
SCTimer example to output center-aligned PWM signal
You will see a change in LED brightness if an LED is connected to the SCTimer output pin
If no LED is connected to the pin, then probe the signal using an oscilloscope
You’ll see PWM signals with changing duty cycle on P18_11 using an oscilloscope.
FRDM-RW612
Hardware requirements
Micro USB cable
FRDM-RW612 board
Personal Computer
Board settings
No special settings are required.
Connect a micro USB cable between the PC host and the MCU-Link USB port (J10) on the 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.
Launch the debugger in your IDE to begin running the demo.
Running the demo
The log below shows example output of the SCTimer driver PWM demo in the terminal window:
SCTimer example to output center-aligned PWM signal
You will see a change in LED brightness if an LED is connected to the SCTimer output pin
If no LED is connected to the pin, then probe the signal using an oscilloscope
Observe the output at J5-4 to see the SCTimer pwm signal.
LPC845BREAKOUT
Hardware requirements
Micro USB cable
LPC845 Breakout board
Personal Computer
Board settings
No special settings are required.
Prepare the demo
Connect a micro USB cable between the PC host and the CMSIS DAP USB port on the board.
Open a serial terminal with the following 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
The log below shows example output of the SCTimer driver PWM demo in the terminal window:
SCTimer example to output center-aligned PWM signal
You will see a change in LED brightness if an LED is connected to the SCTimer output pin
If no LED is connected to the pin, then probe the signal using an oscilloscope
LPCXpresso51U68
Hardware requirements
Mini/micro USB cable
LPCXpresso51U68 board
Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Connect a micro USB cable between the PC host and the CMSIS DAP USB port (J6) on the board
Open a serial terminal with the following settings (See Appendix A in Getting started guide for description how to determine serial port number):
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
The log below shows example output of the SCTimer driver PWM demo in the terminal window:
SCTimer example to output center-aligned PWM signal
You will see a change in LED brightness if an LED is connected to the SCTimer output pin
If no LED is connected to the pin, then probe the signal using an oscilloscope
LPCXpresso54628
Hardware requirements
Micro USB cable
LPCXpresso54628 board
Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Connect a micro USB cable between the host PC and the LPC-Link USB port (J8) 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
The log below shows example output of the SCTimer driver PWM demo in the terminal window:
SCTimer example to output center-aligned PWM signal
You will see a change in LED brightness if an LED is connected to the SCTimer output pin
If no LED is connected to the pin, then probe the signal using an oscilloscope
Use a Digital osc probe on J13_5 to watch the PWM.
LPCXpresso54S018
Hardware requirements
Micro USB cable
LPCXpresso54S018 board
Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Connect a micro USB cable between the host PC and the LPC-Link USB port (J8) 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.
Launch the debugger in your IDE to begin running the demo.
Running the demo
This demo is an external flash plain load demo, ROM will copy image in external flash to SRAMX to run:
Build the demo to generate a bin file. Note: If need to generate bin file using MCUXpresso IDE, below steps need to be followed: Set in example Properties->C/C++ Build->Settings->Build steps->Post-build steps->Edit enbable arm-none-eabi-objcopy -v -O binary “&{BuildArtifactFileName}” “&{BuildArtifactFileBaseName}.bin”
This plainload example linked the vector table to 0x00000000, but program to external flash 0x10000000.
Program the bin file to external on board flash via SEGGER J-FLASH Lite(V6.22 or higher):
a. Open SEGGER J-FLASH Lite, select device LPC54S018.
b. Click the ‘Erase Chip’ to erase the extrenal flash.(if can not success, press SW4 button and reset the board, and try to erase again)
c. Select the bin data file, set the ‘.bin/Erase Start’ address to 0x10000000, then click ‘Program Device’ Note: Please use above way to program the binary file built by armgcc tool chain to external flash. For IAR, KEIL, MCUXpresso IDE, you can use the IDE tool to program the external flash.
The log below shows example output of the SCTimer driver PWM demo in the terminal window:
SCTimer example to output center-aligned PWM signal
You will see a change in LED brightness if an LED is connected to the SCTimer output pin
If no LED is connected to the pin, then probe the signal using an oscilloscope
Use a Digital osc probe on J13_5 to watch the PWM.
LPCXpresso54S018M
Hardware requirements
Micro USB cable
LPCXpresso54S018M board
Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Connect a micro USB cable between the host PC and the LPC-Link USB port (J8) 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.
Launch the debugger in your IDE to begin running the demo.
Running the demo
This demo is an external flash plain load demo, ROM will copy image in external flash to SRAMX to run:
Build the demo to generate a bin file. Note: If need to generate bin file using MCUXpresso IDE, below steps need to be followed: Set in example Properties->C/C++ Build->Settings->Build steps->Post-build steps->Edit enbable arm-none-eabi-objcopy -v -O binary “&{BuildArtifactFileName}” “&{BuildArtifactFileBaseName}.bin”
This plainload example linked the vector table to 0x00000000, but program to external flash 0x10000000.
Program the bin file to external on board flash via SEGGER J-FLASH Lite(V6.22 or higher):
a. Open SEGGER J-FLASH Lite, select device LPC54S018M.
b. Click the ‘Erase Chip’ to erase the extrenal flash.(if can not success, press SW4 button and reset the board, and try to erase again)
c. Select the bin data file, set the ‘.bin/Erase Start’ address to 0x10000000, then click ‘Program Device’ Note: Please use above way to program the binary file built by armgcc tool chain to external flash. For IAR, KEIL, MCUXpresso IDE, you can use the IDE tool to program the external flash.
The log below shows example output of the SCTimer driver PWM demo in the terminal window:
SCTimer example to output center-aligned PWM signal
You will see a change in LED brightness if an LED is connected to the SCTimer output pin
If no LED is connected to the pin, then probe the signal using an oscilloscope
Use a Digital osc probe on J13_5 to watch the PWM.
LPCXpresso55S06
Hardware requirements
Mini/micro USB cable
LPCXpresso55S06 board
Personal Computer
Board settings
Output signal Board location
SCT0_OUT2 J12-12
Prepare the Demo
Connect a micro USB cable between the PC host and the CMSIS DAP USB port (J1) on the board
Open a serial terminal with the following settings (See Appendix A in Getting started guide for description how to determine serial port number):
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
The log below shows example output of the SCTimer driver PWM demo in the terminal window:
SCTimer example to output center-aligned PWM signal
You will see a change in LED brightness if an LED is connected to the SCTimer output pin
If no LED is connected to the pin, then probe the signal using an oscilloscope
You’ll see PWM signals with changing duty cycle on J12_12 using an oscilloscope.
LPCXpresso55S16
Hardware requirements
Mini/micro USB cable
LPCXpresso55S16 board
Personal Computer
Board settings
Output signal Board location
SCT0_OUT2 J12-12
The jumper setting: Default jumpers configuration does not work, you will need to add JP20 and JP21 (JP22 optional for ADC use)
Prepare the Demo
Connect a micro USB cable between the PC host and the CMSIS DAP USB port (J1) on the board
Open a serial terminal with the following settings (See Appendix A in Getting started guide for description how to determine serial port number):
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
The log below shows example output of the SCTimer driver PWM demo in the terminal window:
SCTimer example to output center-aligned PWM signal
You will see a change in LED brightness if an LED is connected to the SCTimer output pin
If no LED is connected to the pin, then probe the signal using an oscilloscope
You’ll see PWM signals with changing duty cycle on J12_12 using an oscilloscope.
LPCXpresso55S28
Hardware requirements
Mini/micro USB cable
LPCXpresso55S28 board
Personal Computer
Board settings
Output signal Board location
SCT0_OUT2 P18-11
# Prepare the Demo
Note: MCUXpresso IDE project default debug console is semihost
Connect a micro USB cable between the PC host and the CMSIS DAP USB port (P6) on the board
Open a serial terminal with the following settings (See Appendix A in Getting started guide for description how to determine serial port number):
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
The log below shows example output of the SCTimer driver PWM demo in the terminal window:
SCTimer example to output center-aligned PWM signal
You will see a change in LED brightness if an LED is connected to the SCTimer output pin
If no LED is connected to the pin, then probe the signal using an oscilloscope
You’ll see PWM signals with changing duty cycle on P18_11 using an oscilloscope.
LPCXpresso55S36
Hardware requirements
Mini/micro USB cable
LPCXpresso55S36 board
Personal Computer
Board settings
Output signal Board location
SCT0_OUT3 J12-8(P0_22)
Prepare the Demo
Connect a micro USB cable between the PC host and the CMSIS DAP USB port (J1) on the board
Open a serial terminal with the following settings (See Appendix A in Getting started guide for description how to determine serial port number):
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
The log below shows example output of the SCTimer driver PWM demo in the terminal window:
SCTimer example to output center-aligned PWM signal
You will see a change in LED brightness if an LED is connected to the SCTimer output pin
If no LED is connected to the pin, then probe the signal using an oscilloscope
You’ll see PWM signals with changing duty cycle on J12_8 using an oscilloscope.
LPCXpresso55S69
Hardware requirements
Mini/micro USB cable
LPCXpresso55s69 board
Personal Computer
Board settings
Output signal Board location
SCT0_OUT2 P18-11
# Prepare the Demo
Note: MCUXpresso IDE project default debug console is semihost
Connect a micro USB cable between the PC host and the CMSIS DAP USB port (P6) on the board
Open a serial terminal with the following settings (See Appendix A in Getting started guide for description how to determine serial port number):
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
The log below shows example output of the SCTimer driver PWM demo in the terminal window:
SCTimer example to output center-aligned PWM signal
You will see a change in LED brightness if an LED is connected to the SCTimer output pin
If no LED is connected to the pin, then probe the signal using an oscilloscope
You’ll see PWM signals with changing duty cycle on P18_11 using an oscilloscope.
LPCXpresso824MAX
Hardware requirements
Mini/micro USB cable
LPCXpresso824MAX board
Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Connect a micro USB cable between the PC host and the CMSIS DAP USB port on the board
Open a serial terminal with the following 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
The log below shows example output of the SCTimer driver PWM demo in the terminal window:
SCTimer example to output center-aligned PWM signal
You will see a change in LED brightness if an LED is connected to the SCTimer output pin
If no LED is connected to the pin, then probe the signal using an oscilloscope
LPCXpresso845MAX
Hardware requirements
Mini/micro USB cable
LPCXpresso845MAX board
Personal Computer
Board settings
No special settings are required.
Prepare the Demo
Connect a micro USB cable between the PC host and the CMSIS DAP USB port on the board
Open a serial terminal with the following 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
The log below shows example output of the SCTimer driver PWM demo in the terminal window:
SCTimer example to output center-aligned PWM signal
You will see a change in LED brightness if an LED is connected to the SCTimer output pin
If no LED is connected to the pin, then probe the signal using an oscilloscope
MCX-N5XX-EVK
Hardware requirements
Mini/micro USB cable
MCX-N5XX-EVK board
Personal Computer
Board settings
Output signal Board location
SCT0_OUT4 J3-3 (P1_22)
Prepare the Demo
Connect a micro USB cable between the PC host and the MCU-Link USB port (J5) on the board
Open a serial terminal with the following settings (See Appendix A in Getting started guide for description how to determine serial port number):
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
The log below shows example output of the SCTimer driver PWM demo in the terminal window:
SCTimer example to output center-aligned PWM signal
You will see a change in LED brightness if an LED is connected to the SCTimer output pin
If no LED is connected to the pin, then probe the signal using an oscilloscope
You’ll see PWM signals with changing duty cycle on J3_3 using an oscilloscope.
MCX-N9XX-EVK
Hardware requirements
Mini/micro USB cable
MCX-N9XX-EVK board
Personal Computer
Board settings
Output signal Board location
SCT0_OUT4 J3-3 (P1_22)
Prepare the Demo
Connect a micro USB cable between the PC host and the MCU-Link USB port (J5) on the board
Open a serial terminal with the following settings (See Appendix A in Getting started guide for description how to determine serial port number):
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
The log below shows example output of the SCTimer driver PWM demo in the terminal window:
SCTimer example to output center-aligned PWM signal
You will see a change in LED brightness if an LED is connected to the SCTimer output pin
If no LED is connected to the pin, then probe the signal using an oscilloscope
You’ll see PWM signals with changing duty cycle on J3_3 using an oscilloscope.
MIMXRT685-AUD-EVK
Hardware requirements
Micro USB cable
MIMXRT685-AUD-EVK board
Personal Computer
Board settings
No special settings are required.
Connect a micro USB cable between the PC host and the CMSIS DAP USB port (J5) on the 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.
Launch the debugger in your IDE to begin running the demo.
Running the demo
The log below shows example output of the SCTimer driver PWM demo in the terminal window:
SCTimer example to output center-aligned PWM signal
You will see a change in LED brightness if an LED is connected to the SCTimer output pin
If no LED is connected to the pin, then probe the signal using an oscilloscope
Observe the green led to see the SCTimer pwm signal.
RD-RW612-BGA
Hardware requirements
Micro USB cable
RD-RW612-BGA board
Personal Computer
Board settings
No special settings are required.
Connect a micro USB cable between the PC host and the MCU-Link USB port (J7) on the 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.
Launch the debugger in your IDE to begin running the demo.
Running the demo
The log below shows example output of the SCTimer driver PWM demo in the terminal window:
SCTimer example to output center-aligned PWM signal
You will see a change in LED brightness if an LED is connected to the SCTimer output pin
If no LED is connected to the pin, then probe the signal using an oscilloscope
Observe the output at HD2-4 to see the SCTimer pwm signal.
MCXW23-EVK
Hardware requirements
Mini/micro USB cable
MCXW23-EVK Board
Personal Computer
Board settings
Output signal Board location
SCT0_OUT5 J20-6
Prepare the Demo
Connect a USB cable between the host PC and the EVK board J33.
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
The log below shows example output of the SCTimer driver PWM demo in the terminal window:
SCTimer example to output center-aligned PWM signal
You will see a change in LED brightness if an LED is connected to the SCTimer output pin
If no LED is connected to the pin, then probe the signal using an oscilloscope
You’ll see PWM signals with changing duty cycle on J20-6 using an oscilloscope.