• State Not Answered
  • Locked Locked
  • Replies 10 replies
  • Subscribers 22 subscribers
  • Views 2234 views
  • Users 0 members are here
Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

LPC23xx gpio code

Chethan

Hello,
Can someone explain what it means??

#define IOPIN0 (*(volatile unsigned long *)(GPIO_BASE_ADDR + 0x00))

The controller using is LPC23xx/24xx.

BR Chethan

Parents
  • 0 in reply to Chethan

    (making allowances for English as a foreign language)

    Well, one common use of the 'volatile' qualifier is to indicate that memory content may bechanged by "another file".

    So think how a hardware SFR (special function register) might have similar issues...

Reply
  • 0 in reply to Chethan

    (making allowances for English as a foreign language)

    Well, one common use of the 'volatile' qualifier is to indicate that memory content may bechanged by "another file".

    So think how a hardware SFR (special function register) might have similar issues...

Children