mirror of
https://github.com/AsahiLinux/u-boot
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133 lines
4.6 KiB
ReStructuredText
133 lines
4.6 KiB
ReStructuredText
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.. SPDX-License-Identifier: GPL-2.0+
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ToC:
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- Introduction
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- Booting
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- Debugging
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Introduction
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============
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The Embedded Artists LPC3250 Developer's Kit v2 features the LPC3250 SoC
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which is based on the ARM926EJ-S CPU. The kit features a base board and
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a removable OEM board which features the SoC. Details, schematics, and
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documentation are available from the Embedded Artists product website:
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https://www.embeddedartists.com/products/lpc3250-developers-kit-v2/
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The base board includes::
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- 200 pos, 0.6mm pitch SODIMM connector for OEM Board
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- LCD expansion connector with control signals for touch screen interface
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- Expansion connector with all OEM Board signals
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- Ethernet connector (RJ45)
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- CAN interface & connector (provision for second CAN interface, but not mounted)
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- MMC/SD interface & connector
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- USB1: OTG or Host interface & connector
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- USB2: Device or Host interface & connector
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- Provision for NXP JN5148 RF module (former Jennic) interface (RF module not included)
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- Full modem RS232 (cannot be fully used on 32-bit databus OEM boards)
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- RS422/485 interface & connector
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- Provision for IrDA transceiver interface (transceiver not mounted)
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- I2S audio codec (mic in, line in, line out, headphone out)
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- SWD/JTAG connector
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- Trace connector and pads for ETM connector
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- Serial Expansion Connector, 14-pos connector with UART/I2C/SPI/GPIO pins
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- Power supply, either via USB or external 5V DC
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- Optional coin cell battery for RTC and LED on ALARM output (coin cell not included)
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- OEM Board current measuring
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- Parallel NOR flash on external memory bus
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- 16-bit register and LEDs on external memory bus
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- 5-key joystick
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- LM75 temperature sensor (I2C connected)
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- 5 push-button keys (four via I2C and one on ISP-ENABLE)
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- 9 LEDs (8 via I2C and one on ISP-ENABLE)
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- Trimming potentiometer to analog input
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- USB-to-serial bridge on UART #0 (FT232R) and ISP functionality
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- Reset push-button and LED
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- Speaker output on analog output from OEM Board, or from I2S audio codec
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- 160x150 mm in size
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The OEM board::
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- ARMv5 ARM926EJ-S @ 266 MHz with hard-float VFPv2
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- 256 KByte IRAM, 64 MByte SDRAM
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- 128 MByte NAND flash
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- 4 MByte NOR Flash
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- Graphics Output: Parallel RGB
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- Hardware 2D/3D Graphic: No
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- Hardware Video: SW only
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- Graphics input: No
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- Audio: I2S
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- Ethernet: 10/100 Mbps
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- USB: 1x FS USB 2.0 OTG
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- Wi-Fi: No
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- FlexIO: No
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- Serial: 2x I2C, 2x SPI, 7x UART
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- ADC/PWM: 3 ch (10-bit) / 2 ch
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- SD: MCI
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- PCIe: No
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- Serial ATA: No
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- Size: 68 x 48 mm
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- Connector: 200 pos SODIMM
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Booting
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=======
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The processor will start its code execution from an internal ROM,
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containing the boot code. This boot loader can load code from one of four
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external sources to internal RAM (IRAM) at address 0x0::
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- UART5
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- SSP0 (in SPI mode)
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- EMC Static CS0 memory
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- NAND FLASH
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The ROM boot loader loads code as a single contiguous block at a maximum
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size of 56 kByte. Programs larger than this size must be loaded in more
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steps, for example, by a secondary boot loader.
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Kickstart Loader
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----------------
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By default the Embedded Artists LPC3250 OEM Board is programmed with the
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kickstart loader in block 0 of the NAND flash. The responsibility of this
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loader is to load an application stored in block 1 and onwards of the NAND
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flash. The kickstart loader will load the application into internal RAM
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(IRAM) at address 0x0.
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Stage 1 Loader (s1l)
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--------------------
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By default the Embedded Artists LPC3250 OEM Board is programmed with the
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stage 1 loader (s1l) in block 1 of the NAND flash. This application will be
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loaded by the kickstart loader when the LPC3250 OEM Board powers up. The
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S1L loader will initialize the board, such as clocks and external memory
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and then start a console where you can give input commands to the loader.
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S1L offers the following booting options::
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- MMC/SD card
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- UART5
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- NAND Flash
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U-Boot with kickstart+s1l
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-------------------------
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Out of the box, the easiest way to get U-Boot running on the EA LPC3250
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DevKit v2 board is to build the ea-lpc3250devkitv2_defconfig, copy the
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resulting u-boot.bin to a vfat-formatted MMC/SD card, insert the MMC/SD card
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into the MMC/SD card slot on the board, reset the board (SW1), and::
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Embedded Artist 3250 Board (S1L 2.0)
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Build date: Oct 31 2016 13:00:37
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EA3250>load blk u-boot.bin raw 0x83000000
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File loaded successfully
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EA3250>exec 0x83000000
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Debugging
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=========
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JTAG debugging of the Embedded Artists LPC3250 Developer's Kit v2 board is
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easy thanks to the included/populated 20-pin JTAG port on the main board (J8).
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openocd 0.11 has been used with this board along with the ARM-USB-OCD-H JTAG
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dongle from Olimex successfully as follows:
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# openocd \
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-f interface/ftdi/olimex-arm-usb-ocd-h.cfg \
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-f board/phytec_lpc3250.cfg
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