Hardware requirements

  • Mini/micro USB cable

  • MIMXRT1160-EVK board

  • Personal Computer

  • USB to Com Converter

Board settings

No special settings are required.

Prepare the Demo

  1. Connect a USB cable between the host PC and the OpenSDA USB port on the target board.

  2. Open a serial terminal with the following settings:

    • 115200 baud rate

    • 8 data bits

    • No parity

    • One stop bit

    • No flow control

  3. Download the program to the target board.

  4. Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.

Running the demo

  1. When running the demo, the debug console shows the menu to provide the desired operation. Here we take multicore targets as an example.

This is core0. Copy Secondary core image to address: 0x20200000, size: XXXXX Starting secondary core. The secondary core application has been started.

CPU wakeup source 0x10001…

Power Mode Switch Demo for iMXRT1166

Core0 send message to core1.

System previous setpoint is 0 System current setpoint is 0 M7 previous CPU mode is RUN M7 current CPU mode is RUN M7 CLK is 696 MHz M4 previous CPU mode is RUN M4 current CPU mode is RUN M4 CLK is 240 MHz

Please select the desired operation: Press A to demonstrate typical set point transition. Press B to demonstrate cpu mode switch in setpoint 0. Press C to enter SNVS mode.

Waiting for select…

  1. When ‘A’ is selected, the menu shows selections for setpoint and CPU mode combination. If CPU enters SUSPEND mode, system will wake up from reset when wakeup event happening. Note: When user select F or G, CPU will be forced to enter SUSPEND mode since power domain WAKEUPMIX is off at setpoint 11~15. System will wake up from reset when wakeup event happening.

Set Point Transition: Press A to enter Set Point: 1 M7 CPU mode: RUN M4 CPU mode: RUN Press B to enter Set Point: 0 M7 CPU mode: RUN M4 CPU mode: RUN Press C to enter Set Point: 5 M7 CPU mode: RUN M4 CPU mode: RUN Press D to enter Set Point: 7 M7 CPU mode: RUN M4 CPU mode: STOP Press E to enter Set Point: 9 M7 CPU mode: STOP M4 CPU mode: RUN Press F to enter Set Point: 11 M7 CPU mode: SUSPEND M4 CPU mode: RUN Press G to enter Set Point: 12 M7 CPU mode: SUSPEND M4 CPU mode: RUN Press H to enter Set Point: 1 M7 CPU mode: SUSPEND M4 CPU mode: SUSPEND System standby Press I to enter Set Point: 0 M7 CPU mode: SUSPEND M4 CPU mode: SUSPEND System standby Press J to enter Set Point: 5 M7 CPU mode: SUSPEND M4 CPU mode: SUSPEND System standby Press K to enter Set Point: 7 M7 CPU mode: SUSPEND M4 CPU mode: SUSPEND System standby Press L to enter Set Point: 10 M7 CPU mode: SUSPEND M4 CPU mode: SUSPEND System standby Press M to enter Set Point: 11 M7 CPU mode: SUSPEND M4 CPU mode: SUSPEND System standby Press N to enter Set Point: 15 M7 CPU mode: SUSPEND M4 CPU mode: SUSPEND System standby Press ‘Q’ to exit

Waiting for select…

  1. When ‘B’ is selected, the menu shows selections for different CPU mode with/without system standby request in setpoint0. If CPU enters SUSPEND mode, system will wake up from reset when wakeup event happening.

Cpu mode switch: Press A to enter cpu mode RUN Press B to enter cpu mode WAIT Press C to enter cpu mode STOP Press D to enter cpu mode SUSPEND Press E to enter cpu mode WAIT, system standby Press F to enter cpu mode STOP, system standby Press G to enter cpu mode SUSPEND, system standby Press ‘Q’ to exit

Waiting for select…

  1. When ‘C’ is selected, the menu shows wake up source selection for SNVS mode.

Select the wake up source: Press T for Timer Press S for switch/button SW7.

Waiting for key press..

Note: In this application, DCDC will be turned off durig SP11~SP15. All memories and peripherals in CM7 platform and WAKEUPMIX/DISPLAYMIX/MEGAMIX will be powered down in SP11~SP15. For ram targets(debug/release), application can’t wake up from SP11~SP15 since data in ram will be lost.

Note: To debug in external flash, following steps are needed:

  1. Select the flash target and compile.

  2. Set the SW1: 1 off 2 off 3 on 4 off, then power on the board and connect USB cable to J11.

  3. Start debugging in IDE.

    • Keil: Click “Download (F8)” to program the image to external flash first then clicking “Start/Stop Debug Session (Ctrl+F5)” to start debugging.