Overview

This is the Linux BSP (Board Support Package) for the Emcraft Systems LCD Vybrid SOM LC Starter Kit.

The BSP provides a software development environment for evaluation and development of Linux on the Cortex-A5 processor core and MQX on the Cortex-M4 processor core of the VF6 microcontroller using the Emcraft Systems LCD Vybrid SOM LC Starter Kit as a hardware platform.

Supported Features

The following list summarizes the features and capabilities of this release of the LCD Vybrid SOM LC Starter Kit BSP:

• U-Boot firmware:
  • Runs on the Cortex-A5 core;
  • U-Boot v2011.12;
  • Target initialization from power-on / reset;
  • Loads from external Flash and runs from RAM;
  • Serial console;
  • Ethernet driver for loading images to the target from network;
  • Serial driver for loading images to the target over UART;
  • Device driver for Flash and self-upgrade capability;
  • Device driver for storing environment and Linux images in Flash;
  • Autoboot feature, allowing boot of OS images from Flash or other storage with no operator intervention;
  • Persistent environment in Flash for customization of target operation;
  • Sophisticated command interface for maintenance and development of the target.
• Linux:
  • Runs on the Cortex-A5 core;
  • Linux kernel v4.5;
  • Device drivers for all key I/O interfaces of the Vybrid;
  • MTD-based Flash partitioning and persistent UBI Flash file system in Flash;
  • busybox v1.17;
  • POSIX pthreads;
  • Loadable kernel modules;
  • Specifically optimized for fast boot-up;
  • Boot of the Cortex-M4 from a binary file in the Linux file system;
  • Low-level Linux-side inter-core MCC communications supported with appropriate device drivers/libraries;
  • Large pool of pre-built Linux packages ready for the Cortex-A5 core.
• MQX:
  • Runs on the Cortex-M4 core;
  • MQX RTOS v.4.0.1;
  • Support for select I/O interfaces of the Vybrid;
  • Low-level MCC communications supported with appropriate libraries.
• Development environment:
  • Linux-hosted cross-development environment;
  • Yocto 1.8.1 distribution;
  • Development of multiple projects (embedded applications) from a single installation.

New and Changed Features

This section lists new and changed features of this release:

1. Fix a U-Boot DDR initialization issue.
   ID: RM 2651.
2. Support a new Toshiba 8 bit NAND chip.
   ID: RM 2652.
3. Fix the U-Boot clock command.
   ID: RM 2653.

Known Problems & Limitations

This section lists known problems and limitations of this release:

1. Kernel crashes while copying a big file from USB Flash to NFS share.
   ID: RM 731.
   Workaround: None.
2. LCD clock doesn't match the value set in .dts.
   ID: RM 930.
   Workaround: None.
3. VF6 SDK: rfs-builder.py pkg-add doesn't work.
   ID: RM 1005.
   Workaround: None.
4. VF6 SDK: rfs-builder.py pkg-list doesn't work.
   ID: RM 1006.
   Workaround: None.
5. Error message while unmounting SD card.
   ID: RM 1013.
   Workaround: None.