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The following alternative design approaches were considered by this project but then discarded for some reason:

• None

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Test Plan

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4.

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1. Secure Download Area

The downloadable materials developed by this project are available from a secure Web page on the Emcraft Systems web site. Specifically, proceed to the following URL to download the software materials:

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• Login: CONTACT EMACRFT

• Password: CONTACT EMACRFT

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2.

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Downloadable-Files Downloadable-Files

Downloadable Files

The following files are available from the secure download area:

• linux-lpspi.patch - patch to the Linux kernel sources;

• projects-lpspi.patch - patch to the rootfs project;

• rootfs.uImage - prebuilt bootable Linux image;

4.3

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. Test Set-Up

4.3

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.1. Hardware Setup

The following hardware setup is required for the i.MX RT 1050 board:

• The i.MXRT1050 EVK board.

• Micron M25P32 SPI Flash Memory, as a separate chip.

• Connect the SPI Flash memory via the "SD TF to TF Flexible Card Extension cable Extender Adapter" attached to the TF Card Slot J20. Details of those connection are as follows:

4.3.

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2. Software Setup

The following software setup is required:

1. Download the files listed in Section: "Downloadable Files" to the top of the Linux i.MX RT installation.

2. Install the BSP, as per the respective "Installing and activating cross development environment" document in the "Software" section on the Emcraft site.

3. From the top of the Linux installation, activate the Linux cross-compile environment by running:

   Code Block
   $ . ACTIVATE.sh

4. From the top of the BSP installation, go to the Linux kernel tree and install the kernel patch, eg:

   Code Block
   $ cd linux/ $ patch -p1 < ../../linux-lpspi.patch

5. From the top of the Linux installation, go to the projects sub-directory, and patch the rootfs project:

   Code Block
   $ cd projects/ $ patch -p1 < ../../projects-lpspi.patch

6. Build the rootfs project:

   Code Block
   $ cd projects/rootfs $ make

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4. Detailed Test Plan

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4.1.

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TestPlan-Demo-Project TestPlan-Demo-Project

Test Plan: Demo Project

Perform the following step-wise test procedure:

1. Go to the projects/rootfs directory, build the loadable Linux image (rootfs.uImage) and copy it to the TFTP directory on the host:

   Code Block
   $ cd projects/rootfs $ make

2. Boot the loadable Linux image (rootfs.uImage) to the target via TFTP and validate that it boots to the Linux shell:

   Code Block

   => run netboot Using ethernet@40424000 device TFTP from server 192.168.1.96; our IP address is 192.168.1.86 Filename 'imxrt1050/rootfs.uImage'. Load address: 0x80007fc0 Loading: ################################################################# ################################################################# ################################################################# ################################################################# ... / # uname Linux / #

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4.2.

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TestPlan-Linux-LPSPI-Driver TestPlan-Linux-LPSPI-Driver

Test Plan: Linux LPSPI Driver

Perform the following step-wise test procedure:

1. From the Linux shell, run dmesg and verify that there are no error messages related to SPI or LPSPI:

   Code Block
   / # dmesg ... / # dmesg | grep spi / #

2. Verify that the spi0 master is registered in the sysfs:

   Code Block
   / # ls /sys/class/spi_master/ spi0 / #

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4.3.

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TestPlan-Raw-SPI-Device-Access TestPlan-Raw-SPI-Device-Access

Test Plan: Raw SPI Device Access

1. Replace the SD card in the SD card slot by the SPI Flash memory M25P32 using "SD TF to TF Flexible Card Extension cable Extender Adapter".

2. Make sure the spidev device exists:

   Code Block
   / # ls -l /dev/spidev0.0 crw------- 1 root root 153, 0 Jan 1 00:00 /dev/spidev0.0 / #

3. Make sure the spidev_flash application reads the correct Flash ID over SPI (first 3 bytes must be 0x20 0x20 0x16 for the M25P32 Flash connected the IMXRT1050-EVK board):

   Code Block
   / # spidev_flash /dev/spidev0.0 response(7): 20 20 16 10 00 00 / #