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| .. | ||
| armgcc | ||
| board.c | ||
| board.h | ||
| clock_config.c | ||
| clock_config.h | ||
| pin_mux.c | ||
| pin_mux.h | ||
| readme.md | ||
| sctimer_pwm_with_dutycyle_change_v3_14.xml | ||
| sctimer_update_dutycycle.c | ||
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.
SDK version
- Version: 2.15.000
Toolchain supported
- IAR embedded Workbench 9.40.1
- Keil MDK 5.38.1
- GCC ARM Embedded 12.2
- MCUXpresso 11.8.0
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.