Stellaris® ARM® Microcontrollers
Options

Big endian vs little endian

Big endian vs little endian

  • Jingxi Zhang
    Posted by
    on Dec 31 2006 14:49 PM
    Prodigy50 points
    Does someone know whether the LM3S811 ARM is a big endian or a little endian CPU? I would like to load the ADC sequencer 0 FIFO data to an unsigned short type data buffer. The ADCSequenceDataGet( ) function reads the ADC sequencer FIFO data to a unsigned long type buffer. Because the ADC data is a 10 bit long, using the unsigned long buffer waste at least double size of the RAM space. Can I simply read the 16-bit data by casting the sequencer 0 FIFO result register ADCSSFIFO0 to a 16-bit address:
    *pBuff ++ = HWREGH(
    ); ?
    However, I know I cannot not do that if it is a big endian CPU.
    Thanks,
    Jingxi
    Report Abuse
  • TI - Eric Hewing
    Posted by
    on Jan 02 2007 10:29 AM
    Expert4160 points
    The devices are all little endian.
    Report Abuse
  • Rajah
    Posted by
    on Oct 21 2010 15:24 PM
    Intellectual300 points

    Is there an option to switch between big or small endianess? Either as a register/pin on the micro or as a compiler option.

    Report Abuse
  • Austin Miller
    Posted by
    on Jan 18 2012 14:00 PM
    Expert6475 points

    Rajah,

    There is not an option to switch the endianess.

    There is a bit, ENDIANESS, in the Application Interrupt and Reset Control register (APINT) within the System Control Block (SCB).

    Best regards,
     
    Austin Miller
    Digital Field Applications | Texas Instruments Inc.
    CCS & Free SW Suites: CCSv5, MSP430Ware, TivaWare, MotorWare
    Report Abuse

All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.

Content on this site may contain or be subject to specific guidelines or limitations on use. All postings and use of the content on this site are subject to the Terms of Use of the site; third parties using this content agree to abide by any limitations or guidelines and to comply with the Terms of Use of this site. TI, its suppliers and providers of content reserve the right to make corrections, deletions, modifications, enhancements, improvements and other changes to the content and materials, its products, programs and services at any time or to move or discontinue any content, products, programs, or services without notice.

TI Worldwide | Contact Us | my.TI Login | Site Map | Corporate Citizenship | mobile m.ti.com (Mobile Version)

TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs and
embedded processors, along with software, tools and the industry’s largest sales/support staff.

© Copyright 1995-2013 Texas Instruments Incorporated. All rights reserved.
Trademarks | Privacy Policy | Terms of Use