| .. _minnowboard_board: |
| |
| MinnowBoard Max |
| ############### |
| |
| Overview |
| ******** |
| |
| The MinnowBoard is an Intel |reg| Atom |trade| processor based board which introduces |
| Intel |reg| Architecture to the small and low cost embedded market for the developer |
| and maker community. It has exceptional performance, flexibility, openness and |
| standards |
| |
| .. figure:: minnowboard.jpg |
| :width: 800px |
| :align: center |
| :alt: Minnowboard |
| |
| Minnowboard (Credit: Intel) |
| |
| |
| The `MinnowBoard`_ board configuration supports the following: |
| |
| * HPET |
| |
| * Advanced Programmed Interrupt Controller (APIC) |
| |
| * NS16550 UART |
| |
| |
| Hardware |
| ******** |
| Supported Features |
| ================== |
| |
| This board configuration supports the following hardware features: |
| |
| +--------------+------------+-----------------------+ |
| | Interface | Controller | Driver/Component | |
| +==============+============+=======================+ |
| | HPET | on-chip | system clock | |
| +--------------+------------+-----------------------+ |
| | APIC | on-chip | interrupt controller | |
| +--------------+------------+-----------------------+ |
| | NS16550 | on-chip | serial port | |
| | UART | | | |
| +--------------+------------+-----------------------+ |
| |
| The kernel currently does not support other hardware features on this platform. |
| |
| HPET System Clock Support |
| -------------------------- |
| |
| This board uses a system clock frequency of 25 MHz. |
| |
| .. note:: |
| The LOAPIC timer may be used instead of the HPET. To do so, |
| set SYS_CLOCK_HW_CYCLES_PER_SEC to a custom value that is tied to the host system speed. |
| |
| Serial Port |
| ----------- |
| |
| This board uses a single serial communication channel |
| with a NS16550 serial driver that operates in polling mode. |
| For an interrupt-driven driver, enable the |
| :option:`CONFIG_UART_INTERRUPT_DRIVEN` kernel configuration option. |
| |
| PCI |
| ---- |
| |
| PCI drivers assume that IO regions and IRQs for devices are preconfigured |
| identically by the firmware on all supported devices. This configuration is |
| specified in the Kconfig file for the Intel Atom SoC. The PCI library supports |
| dynamically enumerating PCI devices, but that support is disabled by default. |
| |
| .. note:: |
| The PCI library does not support 64-bit devices. |
| Memory address and size storage only require 32-bit integers. |
| |
| |
| Known Problems or Limitations |
| ----------------------------- |
| |
| The following platform features are unsupported: |
| |
| * Isolated Memory Regions |
| * Serial port in Direct Memory Access (DMA) mode |
| * Serial Peripheral Interface (SPI) flash |
| * General-Purpose Input/Output (GPIO) |
| * Inter-Integrated Circuit (I2C) |
| * Ethernet |
| * Supervisor Mode Execution Protection (SMEP) |
| |
| |
| |
| Creating a GRUB2 Boot Loader Image from a Linux Host |
| ==================================================== |
| |
| Follow the same steps documented for the :ref:`Galileo board <grub2>`. |
| |
| |
| Booting Zephyr on the MinnowBoard |
| ================================= |
| |
| The MinnowBoard by default will be running a 64bit firmware. To boot Zephyr, you |
| will need to replace the 64bit firmware with the 32bit variant. Please follow |
| the instructions for flashing and updating the firmware documented at the |
| `MinnowBoard firmware`_ website. |
| |
| |
| .. _MinnowBoard: https://minnowboard.org/ |
| .. _MinnowBoard firmware: https://minnowboard.org/tutorials/updating-the-firmware |
