sctimer_simple_pwm#
Overview#
The SCTimer project is a simple demonstration program of the SDK SCTimer’s driver capabiltiy to generate PWM signals. The SCTimer project enables a 32-bit counter to output two center-aligned PWM signals with parameters set to 24kHz frequency. The duty cycles of the two PWM signals are 50% and 20%, respectively.
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 simple PWM demo in the terminal window:
SCTimer example to output 2 center-aligned PWM signals
Probe the signal using an oscilloscope
Use Oscilloscope to measure and observe the J30-1, J30-2 output 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 simple PWM demo in the terminal window:
SCTimer example to output 2 center-aligned PWM signals
Probe the signal using an oscilloscope
Use Oscilloscope to measure and observe the TP6/7 output 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)
SCT0_OUT5 J1-8 (P1_23)
Prepare the Demo
Connect a type-c USB cable between the host PC and the MCU-Link USB port (J17) 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 simple PWM demo in the terminal window:
SCTimer example to output 2 center-aligned PWM signals
Probe the signal using an oscilloscope
You’ll see center-aligned PWM signals on J3-3 and J1-8 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)
SCT0_OUT5 J1-8 (P1_23)
Prepare the Demo
Connect a type-c USB cable between the host PC and the MCU-Link USB port (J17) 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 simple PWM demo in the terminal window:
SCTimer example to output 2 center-aligned PWM signals
Probe the signal using an oscilloscope
You’ll see center-aligned PWM signals on J3-3 and J1-8 using an oscilloscope.
FRDM-MCXW23
Hardware requirements
Type-C USB cable
FRDM-MCXW23 Board
Personal Computer
Board settings
Output signal Board location
SCT0_OUT4 J2-6
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 simple PWM demo in the terminal window:
SCTimer example to output 2 center-aligned PWM signals
Probe the signal using an oscilloscope
Probe an oscilloscope to the output pins described in board settings, you will see two PWM signals.
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 simple PWM demo in the terminal window:
SCTimer example to output 2 center-aligned PWM signals
Probe the signal using an oscilloscope
Use Oscilloscope to measure and observe the J5-4, J1-1 output 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 simple PWM demo in the terminal window:
SCTimer example to output 2 center-aligned PWM signals
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 simple PWM demo in the terminal window:
SCTimer example to output 2 center-aligned PWM signals
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 simple PWM demo in the terminal window:
SCTimer example to output 2 center-aligned PWM signals
Probe the signal using an oscilloscope
Probe oscilloscope at J13-5 and J13-16 to see output signal.
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 simple PWM demo in the terminal window:
SCTimer example to output 2 center-aligned PWM signals
Probe the signal using an oscilloscope
Probe oscilloscope at J13-5 and J13-16 to see output signal.
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 simple PWM demo in the terminal window:
SCTimer example to output 2 center-aligned PWM signals
Probe the signal using an oscilloscope
Probe oscilloscope at J13-5 and J13-16 to see output signal.
LPCXpresso55S06
Hardware requirements
Micro USB cable
LPCXpresso55S06 board
Personal Computer
Board settings
Output signal Board location
SCT0_OUT2 J12-12
SCT0_OUT6 J12-17
Prepare the Demo
Connect a micro USB cable between the host PC and the LPC-Link USB port (J1) 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 simple PWM demo in the terminal window:
SCTimer example to output 2 center-aligned PWM signals
Probe the signal using an oscilloscope
You’ll see center-aligned PWM signals on J12_12 and J12_17 using an oscilloscope.
LPCXpresso55S16
Hardware requirements
Micro USB cable
LPCXpresso55S16 board
Personal Computer
Board settings
Output signal Board location
SCT0_OUT2 J12-12
SCT0_OUT6 J12-14
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 host PC and the LPC-Link USB port (J1) 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 simple PWM demo in the terminal window:
SCTimer example to output 2 center-aligned PWM signals
Probe the signal using an oscilloscope
You’ll see center-aligned PWM signals on J12_12 and J12_14 using an oscilloscope.
LPCXpresso55S28
Hardware requirements
Micro USB cable
LPCXpresso55S28 board
Personal Computer
Board settings
Output signal Board location
SCT0_OUT2 P18-11
SCT0_OUT6 P18-13
# Prepare the Demo
Note: MCUXpresso IDE project default debug console is semihost
Connect a micro USB cable between the host PC and the LPC-Link USB port (P6) 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 simple PWM demo in the terminal window:
SCTimer example to output 2 center-aligned PWM signals
Probe the signal using an oscilloscope
You’ll see center-aligned PWM signals on P18_11 and P18_13 using an oscilloscope.
LPCXpresso55S36
Hardware requirements
Micro USB cable
LPCXpresso55S36 board
Personal Computer
Board settings
Output signal Board location
SCT0_OUT0 J10-5 (P1_4)
SCT0_OUT4 J10-13(P1_17)
Prepare the Demo
Connect a micro USB cable between the host PC and the LPC-Link USB port (J1) 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 simple PWM demo in the terminal window:
SCTimer example to output 2 center-aligned PWM signals
Probe the signal using an oscilloscope
You’ll see center-aligned PWM signals on J10-5 and J10-13 using an oscilloscope.
LPCXpresso55S69
Hardware requirements
Micro USB cable
LPCXpresso55s69 board
Personal Computer
Board settings
Output signal Board location
SCT0_OUT2 P18-11
SCT0_OUT6 P18-13
# Prepare the Demo
Note: MCUXpresso IDE project default debug console is semihost
Connect a micro USB cable between the host PC and the LPC-Link USB port (P6) 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 simple PWM demo in the terminal window:
SCTimer example to output 2 center-aligned PWM signals
Probe the signal using an oscilloscope
You’ll see center-aligned PWM signals on P18_11 and P18_13 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 simple PWM demo in the terminal window:
SCTimer example to output 2 center-aligned PWM signals
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 simple PWM demo in the terminal window:
SCTimer example to output 2 center-aligned PWM signals
Probe the signal using an oscilloscope
MCX-N5XX-EVK
Hardware requirements
Micro USB cable
MCX-N5XX-EVK board
Personal Computer
Board settings
Output signal Board location
SCT0_OUT4 J3-3 (P1_22)
SCT0_OUT5 J1-8 (P1_23)
Prepare the Demo
Connect a micro USB cable between the host PC and the MCU-Link USB port (J5) 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 simple PWM demo in the terminal window:
SCTimer example to output 2 center-aligned PWM signals
Probe the signal using an oscilloscope
You’ll see center-aligned PWM signals on J3-3 and J1-8 using an oscilloscope.
MCX-N9XX-EVK
Hardware requirements
Micro USB cable
MCX-N9XX-EVK board
Personal Computer
Board settings
Output signal Board location
SCT0_OUT4 J3-3 (P1_22)
SCT0_OUT5 J1-8 (P1_23)
Prepare the Demo
Connect a micro USB cable between the host PC and the MCU-Link USB port (J5) 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 simple PWM demo in the terminal window:
SCTimer example to output 2 center-aligned PWM signals
Probe the signal using an oscilloscope
You’ll see center-aligned PWM signals on J3-3 and J1-8 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 simple PWM demo in the terminal window:
SCTimer example to output 2 center-aligned PWM signals
Probe the signal using an oscilloscope
Use Oscilloscope to measure and observe the JP30-1, JP30-2 output 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 simple PWM demo in the terminal window:
SCTimer example to output 2 center-aligned PWM signals
Probe the signal using an oscilloscope
Use Oscilloscope to measure and observe the HD2 Pin4, Pin5 output signal.
MCXW23-EVK
Hardware requirements
Mini/micro USB cable
MCXW23-EVK Board
Personal Computer
Board settings
Output signal Board location
SCT0_OUT4 J20-5
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 simple PWM demo in the terminal window:
SCTimer example to output 2 center-aligned PWM signals
Probe the signal using an oscilloscope
Probe an oscilloscope to the output pins described in board settings, you will see two PWM signals.