7. KARO TX28 CPU module¶
7.1. The CPU module¶
http://www.karo-electronics.de/
This CPU card is based on a Freescale i.MX28 CPU. The card is shipped with:
- 128 MiB synchronous dynamic RAM (DDR2 type), 200 MHz support
- 128 MiB NAND K9F1G08U0A (3.3V type)
- PCA9554 GPIO expander
- DS1339 RTC
- LAN8710 PHY
7.3. How to get barebox for ‘KARO’s Starterkit 5’¶
Using the default configuration:
make ARCH=arm tx28stk5_defconfig
Build the binary image:
make ARCH=arm CROSS_COMPILE=armv5compiler
NOTE: replace the armv5compiler with your ARM v5 cross compiler.
NOTE: to use the result, you also need the following resources from Freescale:
- the ‘bootlets’ archive
- the ‘elftosb2’ encryption tool
- in the case you want to start barebox from an attached SD card the ‘sdimage’ tool from Freescale’s ‘uuc’ archive.
7.4. Memory layout when barebox is running¶
- 0x40000000 start of SDRAM
- 0x40000100 start of kernel’s boot parameters
- below malloc area: stack area
- below barebox: malloc area
- 0x47000000 start of barebox
