How to read and write to eeprom ic (24c16) using i2c in stm32f103

Lchal.1 · ‎2021-01-21

hi, i have to read and write to eeprom ic . i am able to write but i am not able to read from my ic .
void write_eeprom_reg(uint16_t reg_addr, uint8_t value)
{
//uint8_t d[3];
d[0]=(reg_addr>>8) & 0xFF;
d[1]=(reg_addr) & 0xFF;
d[2]=value;
while(HAL_I2C_IsDeviceReady(&hi2c1,(uint16_t)(0x50<<1),3,100)!=HAL_OK)
{
}
if(HAL_I2C_Master_Transmit(&hi2c1,(uint16_t)(0x50<<1),(uint8_t*)d,sizeof(d),1000)!=HAL_OK)
{
Error_Handler();
}
else
{
printf("Master transmitt Successfull\r\n");
}
}
uint8_t read_eeprom_reg(uint16_t addr)
{
uint8_t buffer[]={0x05};
//uint8_t buffer=addr;
uint8_t value;
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*)&value,1,100)!=HAL_OK)
{
if(HAL_I2C_GetError(&hi2c1)!=HAL_I2C_ERROR_AF)
{
Error_Handler();
}
return value;
}
}
This is the code i have done can anyone say me the error what i have done and what i need to add to it so that i can write to my eeprom ic and read from eeprom ic.

Thank you

Pavel A. · ‎2021-01-21

Duplicate: