Re: [gentoo-embedded] arm or armeb?

[Karl Hiramoto <karl@hiramoto.org>]

Jean-Marc Beaune wrote:
> Hi,
>  
> The details:
>  
> - Processor: 16/32 bit *AT91SAM7X256* (ARM7TDMI-S™)
> - 256 K Flash
> - 64 K RAM
> - USB 2.0
> - Ethernet 10/100 Mbits
> - 2 x RS-232
> - ADC (10 bits), CAN, 2 x UARTs, TWI(I2C), 2 x SPI, 3 x timers
> 32bit, SSC, 4 x PWM, WDT, PDC (DMA)
> - Frequency up to  55 MHz
> - JTAG connector (ARM's 2 x 10 pins - ARM-JTAG compatible)
> - Color TFT 128 x 128 pixels
> - SD™/MMC™
> - Mini-joystick
> - Loudspeaker
> - Audio input/output
> - Crystal 18,432 MHz sur support
> - RESET buton
> - Dimension: 128 x 98 mm
>  
> The question is not specifically for this hardware but more "when to
> choose arm and when to choose armeb" ?
>  
> Thank you
>
AFIK,  you can't run linux on  an ARM TDMI with 64K of RAM  :-)


Using the same endianess as your bootloader will save you from byte
swapping.     If you can use the same endianness as the rest of your HW,
it will save the byte sapping operations and may make your system faster.


Some people prefer little endian, because other SW/ drivers has bugs on
little endian machines.


More about endianness you can probably get from googl'ing.

--
Karl