How to read and storage data on an I2C eeprom using an stm32f100 series board.

[SDel.19]

Hello, I' m working in team on a project using stm32 f100 series board. I should use an eeprom to storage and read some data, the eeprom is the following: CAT24C512WI-GT3 and I also have the init code for this I2C eeprom:

void io_ee_scl(char s)
{
	if(s)
		GPIOB->BSRR=GPIO_PIN_6;
	else
		GPIOB->BRR=GPIO_PIN_6;
}
 
void io_ee_sda(char s)
{
	if(s)
		GPIOB->BSRR=GPIO_PIN_7;
	else
		GPIOB->BRR=GPIO_PIN_7;
 
}
 
void io_ee_wp(char s)
{
	if(s)
		GPIOB->BSRR=GPIO_PIN_5;
	else
		GPIOB->BRR=GPIO_PIN_5;
}
char read_eeprom() //read eeprom function
{
	return ( (GPIOB->IDR&GPIO_PIN_7) ? 1 : 0 );
}

so I know the pins conected to my eeprom.

Considering I'm new in stm32 I need your help to understand how I can read and write datas on my eeprom....

Thank you

[Tesla DeLorean]

So you're bit-bang it and not using the I2C peripheral?

Here's the manual for your device http://www.onsemi.com/pub/Collateral/CAT24C512-D.PDF

It describes the signals on the I2C pins, and how the address (eeprom) and data are sent.

Perhaps you can extend your code to implement the functionality described?

[SDel.19]

Yes I am bit banging, can you suggest me where to find c code for do it?

[SDel.19]

Yes I am bit banging, can you suggest me where to find c code for do it?

[S.Ma]

I have shared in this forum an example of I2C bit banging with EEPROM simple customizable source code.

Now, use the forum to find it.

[SDel.19]

Do you mean this post: https://community.st.com/s/feed/0D50X0000AAI9JkSQL ?