= Lpc24xx =


{{Infobox BSP
|BSP_name     = LPC24xx
|Manufacturer = NXP
|image        = Lpcxx.png
|caption      = LPC2478 board
|Board_URL    = http://www.embeddedartists.com/products/kits/
|Architecture = ARMv4
|CPU_model    = ARM7TDMI-S 
|Monitor      = U-Boot
|Simulator    = N/A
|Aliases      = Various
|RAM          = 32 MB SDRAM + 96 KB internal
|NVMEM        = 128 MB NAND Flash, 4 MB NOR Flash + 512 KB internal
|Serial       = 3 x I2C, 1 x I2S, 4 x UARTs, 3 x SPI/SSP
|NICs         = 10/100 Ethernet
|Other        = USB 2.0 full-speed OTG/Device/ OHCI plus PHY and DMA
}}
= Overview =

The LPC24xx series is built on a 2-AHB bus architecture. Like the LPC23xx series, the LPC24xx features Ethernet, USB FS, and CAN. The LPC24xx further adds a USB Host/OTG, an external bus, and higher I/O count, making this the most powerful series of ARM7-based MCUs in the marketplace. The newest LPC247x microcontrollers further integrate an LCD controller supporting high resolution STN and TFT panels with up to 24-bit true color. 
These microcontrollers support Super-Twisted Nematic (STN) and Thin-Film Transistor (TFT) graphic display panels up to 1024 x 768 pixels, from monochrome up to 24-bit true-color, and with hardware cursor support. This capability is ideal for point-of-sale, industrial, and medical/diagnostic applications. Further, the LCD controller supports Windows CE data formats. 
=  Key Features  =

 
 *  72-MHz, 32-bit ARM7TDMI-S with dual AHB buses
 *  512 KB of ISP/IAP Flash and 98 KB of SRAM
 *  10/100 Ethernet MAC with DMA and MII/RMII interface
 *  Two CAN 2.0B controllers with acceptance filtering
 *  General-purpose DMA controller
 *  10-bit A/D converter and 10-bit D/A converter
 *  160 general-purpose Fast I/O pins
 *  XGA LCD controller with dedicated DMA for TFT and
 *  STN panels (LPC247x only)
 *  USB 2.0 full-speed OTG/Device/Host plus PHY and DMA
 *  Multiple serial interfaces: three I2C, one I2S, four UARTs, three SPI/SSP
 *  External memory interface for SDRAM, SRAM, and Flash
 *  Two PWM units and Boundary scan
 *  Four 32-bit timers, a low-power realtime clock, and a Watchdog timer
 *  4-MHz internal RC (IRC) oscillator trimmed to 1% accuracy
 *  160 general-purpose Fast I/O pins
 *  Single 3.3-V power supply

[wiki:File:_Lpc_diagram.png 400px]
= Board Setup =
= RTEMS Lab Board =

Use the boot monitor's "printenv" command to display the firmware settings:
{{{
LPC2468_OEM_Board #  printenv
bootargs=root=/dev/ram initrd=0xa1800000,4000k console=ttyS0,38400N8
bootdelay=3
tftp_boot=tftpboot a0008000 linux.bin;tftpboot a1800000 romfs.bin;go a0008000
nand_boot=nand read a0008000 0 200000;nand read a1800000 200000 400000;go a0008000
mmc_boot=mmc;fatload mmc 0 a0008000 linux.bin;fatload mmc 0 a1800000 romfs.bin;go a0008000
update_uboot=tftpboot a1000000 u-boot.bin;protect off 0 2ffff;erase 0 2ffff;cp.b a1000000 0 $(filesize)
update_nor=tftpboot a1000000 linux.bin;protect off 80000000 803fffff;erase 80000000 803fffff;cp.b a1000000 80000000 $(filesize);tftpboot a1000000 romfs.bin;cp.b a1000000 80200000
update_nand=nand erase;tftpboot a1000000 linux.bin;nand write a1000000 0 200000;tftpboot a1000000 romfs.bin;nand write a1000000 200000 400000
netmask=255.255.255.0
ethaddr=00:1a:f1:00:07:a2
bootcmd=echo Booting RTEMS ...;run rtems
ipaddr=192.168.1.246
serverip=192.168.1.92
rtems=tftp a1000000 /lpc24xx_ea.img;bootm
baudrate=115200
stdin=serial
stdout=serial
stderr=serial

Environment size: 989/4092 bytes
}}}
= Downloading and Executing =

Use the boot monitor's boot command to download and execute the RTEMS image:
{{{
LPC2468_OEM_Board # boot
Booting RTEMS ...
emac: link status = 100Mbps, full duplex
emac: MAC address =  0:1a:f1: 0: 7:a2
TFTP from server 192.168.1.92; our IP address is 192.168.1.246
Filename '/lpc24xx_ea.img'.
Load address: 0xa1000000
Loading: ##################################
done
Bytes transferred = 169211 (294fb hex)
## Booting image at a1000000 ...
   Image Name:   RTEMS
   Image Type:   ARM RTEMS Kernel Image (gzip compressed)
   Data Size:    169147 Bytes = 165.2 kB
   Load Address: a0000000
   Entry Point:  a0000000
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK
## Transferring control to RTEMS (at address a0000000) ...?
}}}
= Debugging =


How do you debug code on this board?  What gdb setup?  BDM, stub, etc?
= Test Reports =

Complete test suite pass on 2009-12-28 with CVS head and VFP soft-float model.
= References =


 *  http://ics.nxp.com/products/lpc2000/lpc24xx/
 *  http://www.arm.com/community/partners/display_product/rw/ProductId/2102/
 *  http://www.digikey.com/us/en/ph/NXP/lpc24.html?WT.z_Tab_Cat=Featured%2520Products

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