Hi, I'm new in this, I need help to define 24c64 and 24c256 in the same sketch I use the library
#include <EEPROM24.h>
#include <I2CMaster.h>
#include <SoftI2C.h>
SoftI2C i2c(10,11); // SDA=10, SCL=11........
the error is here I can not select one of the two can be defined with sw?
if (pina==1)EEPROM24 eeprom(i2c,EEPROM_24LC64);
if (pinb==0)EEPROM24 eeprom(i2c,EEPROM_24LC256);
What is the error that you get?
Can you post the complete code (using code tags as described in point #7 in How to use this forum - please read) that exhibits the error?
Why are you using software I2C?
Which board are you compiling for?
Thanks for answering
I do not know if I can upload the entire code because it is not mine, I just want to modify it to be able to use it with different eeprom.
I'm using arduino nano
the code works only that I do not know how to use the i2c library that is from elektor-magazine I do not know if it breaks any rule of the forum this is the link of the project
What I want to do is use a pin as switch to change from 24c64 to 24c256
Can I change ic eeprom while another is initialized?
I already asked the one who did the project but he does not answer
@OP
Do you want to opertae 24C64 and 24C256 EEPROMs simultaneously? To do it, you assign address 0x50 (1010A2A1A0 = 1010000) for 24C256 and address 0x57 (1010A2A1A0 = 1010111) for 24C64. Now, the chips have different I2C Bus addresses and you can very well perform data read/write operations.
Sample codes:
#include<Wire.h>
void setup()
{
Serial.begin(9600);
Wire.beginTransmission(0x50); //accessing 24C256
Wire.write(0x12); //upper byte of location address 0x1234
Wire.write(0x34); //lower byte of location address 0x1234
Wire.write(0x57); //data for location 0x1234;
Wire.endTransmission();
delay(5); //must wait for 5 ms as it is write cycle time
}
Wire.beginTransmission(0x50); //accessing 24C256
Wire.write(0x12); //upper byte of location address 0x1234
Wire.write(0x34); //lower byte of location address 0x1234
Wire.endTransmission();
Wire.requestFrom(0x50, 1); //command to read data from location 0x1234
byte x = Wire.read(); //data in x
Serial,print(x, HEX); //serial monitor should show 57
//=== repeat the aboce code for 24C64 EPROM at I2C address 0x57 and data location 0x1278.
}
void loop()
{
}