
This SDK has been patched by Embedded Artists for the iMXRT1062 Developer's Kit.
The SDK was released on 2022-11-18 and is based on NXP's 2.12.1 SDK (SDK_2_12_1_MIMXRT1062xxxxA.zip).

This is what has been patched:
* Set CPU speed according to Commercial/Industrial CPU
* Correction of the VDD_SOC_IN voltage.
* Flash settings (speed, algorithm, size, driver) to work with the 4MB OctalSPI ATXP032
* LWIP projects - added reading of the MAC address from the onboard I2C EEPROM
* Added an I2C driver for the gpio expander (PCA6416) and code to use it
* Modified pin muxing
* SEMC projects - changed algorithm for memory test and now test entire 32MB instead of only 4KB
* Adjusted the USB interface number for USB Host examples (it is different for host and device examples)
* Added a software_reset() function in board.c/.h to issue a JEDEC reset before NVIC_SystemReset()
* Changed the Wi-Fi examples to use the Embedded Artists 1XK M.2 Module (EAR00385) as default
* Many of the projects have been updated to use a more complete pin_mux.c file where all
  necessary pins have been initialized. The SDK examples used to only configure the pins
  that they use (and often not every pin) and most of the time the configuration was only
  for MUX:ing and not the PAD settings (pull up/down/none, drive strength and slew).
* Embedded Wizard project 'ew_gui_smart_thermostat' was incorrectly setup for EVKB
* Changed the default display to RK043FN02H as it is the one mounted on the Developer's Kits

This has been added:
* New WDOG examples that work
* I2C probe example
* Example to show the use of software_reset()

This has been removed:
* All projects for the EVK - only keeping EVKB which is then patched
* The original WDOG and RTWDOG examples as those were not working

Important things to note:
* Read section "8 - Known Issues" in docs/MCUXpresso SDK Release Notes for EVK-MIMXRT1060.pdf
  to see known issues with the current version of the SDK.
* For Iperf examples, set compiler optimization to -O3 or similar to improve performance.
* If the hardware seems unresponsive and the debugger cannot connect/flash/erase the current program
  then the most likely cause is the running program preventing the access. To stop the currently
  running program and regain control:
  1) Press and hold down the ISP_ENABLE button (SW1)
  2) Press and hold down the RESET button (SW3)
  3) Let go of the RESET button
  4) Wait an extra second or two
  5) Release the ISP_ENABLE button
  6) The hardware is now in a mode where programming/erasing it should work

Connectors:
* J22 (micro USB) is the default UART and unless specified otherwise it is setup for 115200 8/N/1


Everything below this line is the original content of the readme file.
=======================================================================



Overview
========
The SAI Demo application demonstrates complicated digital audio playback and record case. The demo provide these features below:
1. Duplex audio transfer, record and playback at same time.
2. Playback a 250 Hz sine wave data generated by CMSIS-DSP library. Also compute the fundamental frequency using Fast Fourier Transform with CMSIS-DSP library.
3. Record a 5 seconds audio to sdcard with a FatFs system. After record, playback it. This feature may only existed in platform which support sdhc.

Toolchain supported
===================
- Keil MDK  5.37
- GCC ARM Embedded  10.3.1
- MCUXpresso  11.6.0
- IAR embedded Workbench  9.30.1

Hardware requirements
=====================
- Mini/micro USB cable
- MIMXRT1060-EVKB board
- Personal Computer
- Headphone(OMTP standard)
- SD card

Board settings
==============
Make sure resistors R368/R347/R349/R365/R363 are removed.

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.	Insert SD card to card slot
4.  Download the program to the target board.
5.  Insert the headphones into the headphone jack on MIMXRT1060-EVKB board (J34).
6.  Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.

Running the demo
================
Note: This demo uses both headphone mic and board main mic(P1) as input source. The headphone mic provides left
channel data, and main mic (P1) provides right channel data. If users found there is noise while do record operation,
most probably it is the headphone standard issue (OMTP and CTIA standard difference). should use the OMTP
standard headphone. You can disable the left channel by using an headphone without microphone feature.

Before you run this demo, please check the txHandle and rxHandle variable in peripherals.c, make sure they are in non-cache area.

This following section shows how to run the demo:

Please note that the log print out may be different according to the different card,
If the card doesn't been formatted ,the case will making new file system and below log will be printed,
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SAI Peripheral Demo started!
Please insert a card into board.

Card inserted.

Make file system......The time may be long if the card capacity is big.

Create directory......
Please choose the option :
1. Record and playback at same time
2. Playback sine wave
3. Record to SDcard, after record playback it
4. Quit
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

If the card is formatted already, the case will mount the file system only, the case will print below log,
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SAI Peripheral Demo started!
Please insert a card into board.

Card inserted.

Mount volume Successfully.

Create directory......
Please choose the option :
1. Record and playback at same time
2. Playback sine wave
3. Record to SDcard, after record playback it
4. Quit
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
