I2C problem (ST72F321)

[yose_yas]

Posted on May 31, 2006 at 09:13

I2C problem (ST72F321)

[yose_yas]

Posted on May 25, 2006 at 18:39

hi,

I use the communication between ST72F321 and memorie EEPROM 24c65 of microchip. all alone program I2C functions well in Reading & writing in the memory. but when I use interrupt Real Time Clock (RTC) [ MCCSR eo Timer B ], the bus I2C is frozen, I do not know why!? if you have an idea, pleaze help. thank you

[yose_yas]

Posted on May 31, 2006 at 09:13

hi, i hope to have an unswer.

I'm going explaine now the program:

i'm using GPS data via SCI bus, en then each 10 second we should store data GPS in I²C memory.

the problem is when 10s is reached, i can't write to I²C data register ( I²C bus is frozen).

N.B: i'm not using Active halt Mode, the MCU is in run mode.