To read and write EEPROM IC 24c16

[MS.11]

Is it possible to set I2C SCL and SDA pins to high and low in stm32 to read and write the EEPROM IC. If it is possible plz help me how to do that and how to generate the function to read and write the EEPROM 24c16 IC in stm32.Plz help me.

Thank you

[Vangelis Fortounas]

Hello

HAL_I2C_Mem_Read(...) and HAL_I2C_Mem_Write(...) functions are suitable for this

eg

uint8_t b[6];// define the buffer

HAL_I2C_Mem_Read(&hi2c, 0xA0, 0x00, 1, b, 6, 100);// 24c16 read the first 6 bytes from page 0.

parameters

hi2c is the I2C structure

0xA0 is the slave address for page 0

0x00 is the adress of first byte of current page

1 is the length of the address

b is a pointer to buffer

6 is the length of pointer

100 msec is the timeout for this operation to return.. ( check the return value.)

[MS.11]

Thank you.

uint8_t read_eeprom(uint16_t reg_addr)

{

uint8_t buffer[3]={reg_addr};

buffer[0]=(reg_addr>>8) & 0xFF;

buffer[1]=(reg_addr) & 0xFF;

while(HAL_I2C_IsDeviceReady(&hi2c1, (uint16_t)(0x50<<1), 3, 100)!=HAL_OK)

{

}

while(HAL_I2C_Master_Transmit(&hi2c1, (uint16_t)(0x50<<1), (uint8_t*)&buffer, 2, 100)!=HAL_OK)

{

if(HAL_I2C_GetError(&hi2c1)!=HAL_I2C_ERROR_AF)

{

Error_Handler();

}

}

while(HAL_I2C_IsDeviceReady(&hi2c1, (uint16_t)(0x50<<1), 3, 100)!=HAL_OK)

{

}

while(HAL_I2C_Master_Receive(&hi2c1, (uint16_t)(0x50<<1), (uint8_t*)buf, 1, 100)!=HAL_OK)

{

if(HAL_I2C_GetError(&hi2c1)!=HAL_I2C_ERROR_AF)

{

Error_Handler();

}

}

return buf;

}

I tried like this. Is this wrong or tell me plz what mistake I am doing here

[KnarfB]

You should read and understand the warnings that you get from the compiler.