BELK-TN-007: FreeRTOS on single-core Bora Lite SoM
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This technical note was validated against specific versions of hardware and software. What is described here may not work with other versions. |
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Contents
History[edit | edit source]
| Version | Date | Notes |
|---|---|---|
| 1.0.0 | February 2020 | First public release |
Introduction[edit | edit source]
In general, Bora Lite SoM is suited for compact, cost-sensitive applications for which Bora or BoraX would be overkilling. In this scenario, Bora Lite is often equipped with XC7Z007 or XC7Z014 SoC's, which implement single-core processors. In combination with FreeRTOS, such configurations can be the right solution to address applications with real-time constraints as well. This Technical Note (TN) shows how to use FreeRTOS on a single-core Bora Lite model. TBD
Testbed[edit | edit source]
From the hardware perspective, the testbed is like the one shown here. It consists of TBD, which is the default configuration of the TBD kit.
The BoraXEVB carrier board is set up to make the SoM boot from the microSD card.
As bootloader, the U-Boot release provided by the BELK kit is used:
U-Boot SPL 2017.01-belk-4.1.1 (Jan 08 2020 - 16:46:11) mmc boot Trying to boot from MMC1 reading fpga.bit spl_load_image_fat: error reading image fpga.bit, err - -1 spl: error reading image fpga.bit, err - 1 reading u-boot.img reading u-boot.img U-Boot 2017.01-belk-4.1.1 (Jan 08 2020 - 16:46:11 +0100), Build: belk-4.1.1 Model: Bora Board: Xilinx Zynq I2C: ready DRAM: ECC disabled 1 GiB Relocating to 3ff14000, new gd at 3ead3ee8, sp at 3ead3ec0 NAND: 1024 MiB MMC: sdhci@e0100000: 0 (SD) reading bora.env In: serial@e0001000 Out: serial@e0001000 Err: serial@e0001000 Model: Bora Board: Xilinx Zynq SF: Detected is25lp128 with page size 256 Bytes, erase size 64 KiB, total 32 MiB SOM ConfigID CRC mismatch for 0xff0101ff (was 0xffffffff, expected 0xca9a6d16) at block 2 (offset 96): using default SF: Detected is25lp128 with page size 256 Bytes, erase size 64 KiB, total 32 MiB SOM UniqueID not found, using default SOM ConfigID#: ffffffff SOM UniqueID#: ffffffff:ffffffff ds2431_readmem(): error in chip reset ds2431_readmem(): error in reading buffer ds2431_readmem(): error in chip reset ds2431_readmem(): error in reading buffer CB ConfigID CRC mismatch for 0x00000000 (was 0x00000000, expected 0x2144df1c) at block 3 (offset 96): using default CB ConfigID#: ffffffff CB UniqueID#: 00000000:00000000 Net: ZYNQ GEM: e000b000, phyaddr 7, interface rgmii-id eth0: ethernet@e000b000 Bora>
Setting up the Hello, world! project[edit | edit source]
Running the application[edit | edit source]
Hello from Freertos example main Rx task received string from Tx task: Hello World Rx task received string from Tx task: Hello World Rx task received string from Tx task: Hello World Rx task received string from Tx task: Hello World Rx task received string from Tx task: Hello World Rx task received string from Tx task: Hello World
