
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 lwip_mqtt demo application demonstrates MQTT client connecting to MQTT broker via unsecured socket.
The application obtains IP and DNS addresses from DHCP and resolves broker's hostname if needed.
Then it connects to the broker and subscribes to the "lwip_topic/#" and "lwip_other/#" topics.
Further it publishes five messages to the "lwip_topic/100" which are also received back
as the board is subscribed to the "lwip_topic/#".
Meanwhile it continues to receive messages published to the subscribed topics from other clients.


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

Hardware requirements
=====================
- Mini/micro USB cable
- MIMXRT1060-EVKB board
- Personal Computer

Board settings
==============
No special settings are required.

Prepare the Demo
================
1.  Make sure the MQTT broker pointed to by EXAMPLE_MQTT_SERVER_HOST and EXAMPLE_MQTT_SERVER_PORT definitions
    is up and accessible on your network via unsecured socket. A public MQTT testing server can be used
    or you can install a broker locally and modify the definitions mentioned above.
2.  Connect a USB cable between the PC host and the OpenSDA(or USB to Serial) USB port on the target board.
3.  Open a serial terminal on PC for OpenSDA serial(or USB to Serial) device with these settings:
    - 115200 baud rate
    - 8 data bits
    - No parity
    - One stop bit
    - No flow control
4.  Insert the Ethernet Cable into the target board's RJ45 port and connect it to a router (or other DHCP server capable device).
5.  Download the program to the target board.
6.  Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.

Running the demo
================
When the demo runs, the log would be seen on the terminal like:

Initializing PHY...

************************************************
 MQTT client example
************************************************
Getting IP address from DHCP...

IPv4 Address     : 192.168.0.102
IPv4 Subnet mask : 255.255.255.0
IPv4 Gateway     : 192.168.0.100

Resolving "broker.hivemq.com"...
Connecting to MQTT broker at 18.185.216.165...
MQTT client "nxp_f50003c25757bd58aa6d0ce50102f020" connected.
Subscribing to the topic "lwip_topic/#" with QoS 0...
Subscribing to the topic "lwip_other/#" with QoS 1...
Subscribed to the topic "lwip_topic/#".
Subscribed to the topic "lwip_other/#".
Going to publish to the topic "lwip_topic/100"...
Published to the topic "lwip_topic/100".
Received 18 bytes from the topic "lwip_topic/100": "message from board"
Going to publish to the topic "lwip_topic/100"...
Published to the topic "lwip_topic/100".
Received 18 bytes from the topic "lwip_topic/100": "message from board"
Going to publish to the topic "lwip_topic/100"...
Published to the topic "lwip_topic/100".
Received 18 bytes from the topic "lwip_topic/100": "message from board"
Going to publish to the topic "lwip_topic/100"...
Published to the topic "lwip_topic/100".
Received 18 bytes from the topic "lwip_topic/100": "message from board"
Going to publish to the topic "lwip_topic/100"...
Published to the topic "lwip_topic/100".
Received 18 bytes from the topic "lwip_topic/100": "message from board"
