pwm_fault#
Overview#
This demo application demonstrates the FlexPWM fault protection. This application demonstrates the pulse width modulation function of FlexPWM module. It outputs the PWM to control the intensity of the LED. PWM shuts down when a fault signal is detected on the CMP output. One input of CMP, other input is from internal DAC.
Supported Boards#
EVKB-IMXRT1050
Hardware requirements
Mini/micro USB cable
EVKB-MIMXRT1050 board
Personal Computer
Oscilloscope
Board settings
Probe the pwm signal using an oscilloscope
At J24-6
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
The log below shows the output of the pwm fault demo in the terminal window:
Welcome to PWM Fault demo
Use oscilloscope to see PWM signal at probe pin: J24-6
Connect pin J23-5 to high level and ground to see change.
Note: The level state on pin J23-5 determines the output of the PWM signal
When at low level, the PWM signal will output at pin J24-6.
When at high level, the PWM signal output will be disabled.
MIMXRT1060-EVKB
Hardware requirements
Mini/micro USB cable
MIMXRT1060-EVKB board
Personal Computer
Oscilloscope
Board settings
Weld 0Ω resistor to R362.
Probe the pwm signal using an oscilloscope
At J17-6
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
The log below shows the output of the pwm fault demo in the terminal window:
Welcome to PWM Fault demo
Use oscilloscope to see PWM signal at probe pin: J17-6
Connect pin J33-5 to high level and ground to see change.
Note: The level state on pin J33-5 determines the output of the PWM signal
When at low level, the PWM signal will output at pin J17-6.
When at high level, the PWM signal output will be disabled.
MIMXRT1060-EVKC
Hardware requirements
Mini/micro USB cable
MIMXRT1060-EVKC board
Personal Computer
Oscilloscope
Board settings
Weld 0Ω resistor to R362.
Probe the pwm signal using an oscilloscope
At J17-6
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
The log below shows the output of the pwm fault demo in the terminal window:
Welcome to PWM Fault demo
Use oscilloscope to see PWM signal at probe pin: J17-6
Connect pin J33-5 to high level and ground to see change.
Note: The level state on pin J33-5 determines the output of the PWM signal
When at low level, the PWM signal will output at pin J17-6.
When at high level, the PWM signal output will be disabled.
EVK-MIMXRT1020
Hardware requirements
Mini/micro USB cable
EVK-MIMXRT1020 board
Personal Computer
Board settings
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
The log below shows the output of the pwm fault demo in the terminal window:
Welcome to PWM Fault demo
Use oscilloscope to see PWM signal at probe pin: J17-8
Connect pin J17-7 to high level and ground to see change.
Note: The level state on pin J17-7 determines the output of the PWM signal
When at low level, the PWM signal will output at pin J17-8.
When at high level, the PWM signal output will be disabled.
Note: To debug in qspiflash, following steps are needed:
Select the flash target and compile.
Set the SW8: 1 off 2 off 3 on 4 off, then power on the board and connect USB cable to J23.
Start debugging in IDE.
Keil: Click “Download (F8)” to program the image to qspiflash first then clicking “Start/Stop Debug Session (Ctrl+F5)” to start debugging.
MIMXRT1024-EVK
Hardware requirements
Mini/micro USB cable
MIMXRT1024-EVK board
Personal Computer
Board settings
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
The log below shows the output of the pwm fault demo in the terminal window:
Welcome to PWM Fault demo
Use oscilloscope to see PWM signal at probe pin: J17-16
Connect pin J17-14 to high level and ground to see change.
Note: The level state on pin J17-14 determines the output of the PWM signal
When at low level, the PWM signal will output at pin J17-16.
When at high level, the PWM signal output will be disabled.
Note: To debug in qspiflash, following steps are needed:
Select the flash target and compile.
Set the SW8: 1 off 2 off 3 on 4 off, then power on the board and connect USB cable to J23.
Start debugging in IDE.
Keil: Click “Download (F8)” to program the image to qspiflash first then clicking “Start/Stop Debug Session (Ctrl+F5)” to start debugging.
MIMXRT1040-EVK
Hardware requirements
Mini/micro USB cable
MIMXRT1040-EVK board
Personal Computer
Oscilloscope
Board settings
Weld 0Ω resistor to R362. Remove the M.2 external device if inserted on board.
Probe the pwm signal using an oscilloscope
At J17-6
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
The log below shows the output of the pwm fault demo in the terminal window:
Welcome to PWM Fault demo
Use oscilloscope to see PWM signal at probe pin: J17-6
Connect pin J17-9 to high level and ground to see change.
Note: The level state on pin J17-9 determines the output of the PWM signal
When at low level, the PWM signal will output at pin J17-6.
When at high level, the PWM signal output will be disabled.
EVK-MIMXRT1064
Hardware requirements
Mini/micro USB cable
EVK-MIMXRT1064 board
Personal Computer
Oscilloscope
Board settings
Probe the pwm signal using an oscilloscope
At J24-6
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
The log below shows the output of the pwm fault demo in the terminal window:
Welcome to PWM Fault demo
Use oscilloscope to see PWM signal at probe pin: J24-6
Connect pin J23-5 to high level and ground to see change.
Note: The level state on pin J23-5 determines the output of the PWM signal
When at low level, the PWM signal will output at pin J24-6.
When at high level, the PWM signal output will be disabled.