int32 and eeprom

[Vidal]

How Can I write a int32 variable to the internal eeprom ?
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Original Post ID: 8123

[Nicholas Kinnas]

<font face="Courier New" size=-1>:=How Can I write a int32 variable to the internal eeprom ?

to restore

v1 = read_eeprom(address);
v2 = read_eeprom(address+1);
v3 = read_eeprom(address+2);
v4 = read_eeprom(address+3);

i32 = Make32(v1,v2,v3,v4);</font>
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This message was ported from CCS's old forum
Original Post ID: 8126

[Nicholas Kinnas]

:=How Can I write a int32 variable to the internal eeprom ?

write_eeprom(address,make8(var,0))
write_eeprom(address+1,make8(var,1))
write_eeprom(address+2,make8(var,2))
write_eeprom(address+3,make8(var,3))
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Original Post ID: 8127

[johnpcunningham]

:=How Can I write a int32 variable to the internal eeprom ?

Here is one that I have used and works well
////////////////////////////
void ee_write32(char base_address ,int32 data){
char i;
for(i=0; i<4; i++)
write_eeprom(base_address+i,*(&data+i));
}
////////////////////////////

////////////////////////////
int32 ee_read32(char base_address){
char i;
int32 data_read;

for(i=0; i<4; i++)
*(&data_read+i) = read_eeprom(base_address+i);
return (data_read);
}
/////////////////////////////

////////////////////////////
void main(){
int32 data, data1;

data = 0xA5A5A5A5;
ee_write32(0x00, data); //write data to EEPROM loc 0x00

data1 = 0x12345678;
ee_write32(0x04, data1); //write data to EEPROM loc 0x04

data = ee_read32(0x00); //read data from EEPROM loc 0x00
data1 = ee_read32(0x04); //read data from EEPROM loc 0x04
while(1){}; //infinite loop
}
////////////////////////////
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Original Post ID: 8130

[R.J.Hamlett]

:=How Can I write a int32 variable to the internal eeprom ?

As a slightly more 'generic' answer than those allready given:
void EEPROM_GET(int *ptr,int num,int addr)
{
int count;
for (count=0;count {
INTOFF;
*ptr++=RD_EEPROM(addr+count);
INTON;
}
}

void EEPROM_PUT(int *ptr,int num,int addr)
{
int count;
for (count=0;count {
INTOFF;
WRT_EEPROM(addr+count,*ptr++);
INTON;
}
}

Now I use the macros 'INTON', and 'INTOFF', to enable/disable any interrupts that might also use the same data areas that are being transferred to the EEPROM/from the EEPROM. So (for instance) if you are storing a value that is also used in a clock, then you should disable the clock interrupt during transfers.
The routines are called with the address of the variable to be transferred, the number of bytes to transfer, and the address in the EEPROM.
So to write a int32 to the start of the EEPROM (address 0 in the EEPROM), you would use:

EEPROM_PUT(&int32variable,sizeof(int32variable),0);

while getting it back from the EEPROM would use:

EEPROM_GET(&int32variable,sizeof(int32variable),0);

Best Wishes
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Original Post ID: 8132