4.17.3. Loongson LS1B

The LS1B is a development board made by Loongson Technology Corp. Ltd.

The board has

  • Loongson LS1B SoC 250 MHz;

  • 64 MiB SDRAM;

  • 512 KiB SPI boot ROM;

  • 128M x 8 Bit NAND Flash Memory;

  • 2 x RS232 serial interfaces (DB9 connectors);

  • 2 x Ethernet interfaces;

  • 4 x USB interfaces;

  • microSD card slot;

  • LCD display (480x272);

  • audio controller;

  • beeper;

  • buttons;

  • EJTAG 10-pin connector.

The board uses PMON2000 as bootloader.

4.17.3.1. Running barebox

  1. Connect to the boards’s UART2 (115200 8N1);

  2. Turn board’s power on;

  3. Wait Press <Enter> to execute loading image prompt and press the space key.

  4. Build barebox and upload images/barebox-loongson-ls1b.img via Ymodem to the board:

PMON> ymodem base=0xa0200000

  1. Run barebox

PMON> g -e 0xa0200000