control internally eeprom like st72c334

bonollo · ‎2004-01-21

Posted on January 22, 2004 at 07:37

bonollo · ‎2004-01-20

Posted on January 20, 2004 at 09:06

can you help me about to control the EEPROM internal of the ST72c334, for read and write data access at the eeprom location???'

thank you

marco32 · ‎2004-01-20

Posted on January 20, 2004 at 10:30

To read or write to the EEPROM you must first select the LAT bit in the EECSR register. After that you can read or write to the EEPROM like a normal RAM.

See the Atachment

________________

Attachments :

EEPROM.asm : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I0Gu&d=%2Fa%2F0X0000000bWR%2F5Tq.c5LjljVCWpGRJR5.Pm0cjEy.g8FPCmewTISyZ0o&asPdf=false

jatin · ‎2004-01-20

Posted on January 21, 2004 at 02:34

Data EEPROM Read/Write operation can be controlled using LAT bit of EEPROM contol/status register(EECSR). For read operation LAT=0 and for write operation LAT=1. Data EEPROM programming flowChart is explained in the 72334 datasheet.

luca239955_st · ‎2004-01-21

Posted on January 21, 2004 at 11:02

if you use C, the compiler (+linker and libraries) will take care of everything for you.

Luca

bonollo · ‎2004-01-21

Posted on January 22, 2004 at 07:00

Ok thanks all for the help but an interrupt like

@interrupt void eeromWrited (void)

{

ClrBit(stato_EERom,_eeWaitFlag);

}

dont't like function very well how???

sjo · ‎2004-01-21

Posted on January 22, 2004 at 07:37

Check interrupt vector is at 0xFFE4, global interrupts are enabled (rim) and bit 2 of the control/status register is set.

As it looks like you are using cosmic, jusr define a eeprom segment in your linker file and cosmic will do the rest, eg.

+seg .eeprom -b 0x0C00 -m256

then declare variables as:

@eeprom unsigned char data;

Cosmic does not support eeprom interrupt though.

Regards

sjo