[avr-libc-dev] [bug #30735] bug in example twitest

[Harald Peters]

URL:
  <http://savannah.nongnu.org/bugs/?30735>

                 Summary: bug in example twitest
                 Project: AVR C Runtime Library
            Submitted by: haraldp
            Submitted on: Di 10 Aug 2010 18:50:11 GMT
                Category: Documentation
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Documentation
                  Status: None
        Percent Complete: 0%
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 1.6.8
           Fixed Release: None

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Details:

There is a bug in function:
int ee24xx_write_page(uint16_t eeaddr, int len, uint8_t *buf)
if more than 1 byte are written 3 bytes before the end of a page, the
function writes one byte more than required
 
wrong:
...
  if (eeaddr + len < (eeaddr | (PAGE_SIZE - 1)))
    endaddr = eeaddr + len;
...
correct:
...
  if (eeaddr + len <= (eeaddr | (PAGE_SIZE - 1)))
                   ===
    endaddr = eeaddr + len;
...






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