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STM32F0 discovery board with I2C

Question asked by vadoud.ali on Aug 2, 2014
Latest reply on Aug 4, 2014 by vadoud.ali
Hello, I want to communicate with an I2C eeprom but I don't know how to read/write bytes and how to sen the adress. I have an initialisation code that I found on the forum but I am stuck. 
does anybody now how to communicate with that eeprom?

that is my initialisation code:

void set_I2C(void){
        GPIO_InitTypeDef GPIO_InitStructure;
        I2C_InitTypeDef I2C_InitStructure;
 
            RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
        RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
 
        RCC_I2CCLKConfig(RCC_I2C1CLK_SYSCLK);
 
        GPIO_PinAFConfig(GPIOB, GPIO_PinSource6, GPIO_AF_1);
        GPIO_PinAFConfig(GPIOB, GPIO_PinSource7, GPIO_AF_1);
 
        //Configure pins: SCL and SDA ------------------
        GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
        GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
        GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
        GPIO_Init(GPIOB, &GPIO_InitStructure);
 
        I2C_DeInit(I2C1);
        I2C_Cmd(I2C1, DISABLE);
        I2C_InitStructure.I2C_AnalogFilter = I2C_AnalogFilter_Enable;
        I2C_InitStructure.I2C_DigitalFilter = 0x00;
        I2C_InitStructure.I2C_OwnAddress1 = 0x40;
        I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
        I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
        //I2C_InitStructure.I2C_Timing = 0xA0120227;
        //I2C_InitStructure.I2C_Timing = 0x20310A0D;
        I2C_InitStructure.I2C_Timing =0xB0420F13; //100KHz (see page 529 - table 73 in the manual reference)
    I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
        I2C_Cmd(I2C1, ENABLE);
        I2C_Init(I2C1, &I2C_InitStructure);
 
        I2C_ITConfig(I2C1, I2C_FLAG_TXE, ENABLE);
 
 
 
 
 
 
 
        RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2, ENABLE);
        RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
 
        GPIO_PinAFConfig(GPIOB, GPIO_PinSource11, GPIO_AF_1);
        GPIO_PinAFConfig(GPIOB, GPIO_PinSource10, GPIO_AF_1);
 
 
        GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 | GPIO_Pin_10;
        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
        GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
        GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
        GPIO_Init(GPIOB, &GPIO_InitStructure);
 
        I2C_DeInit(I2C2);
        I2C_Cmd(I2C2, DISABLE);
        I2C_InitStructure.I2C_AnalogFilter = I2C_AnalogFilter_Disable;
        I2C_InitStructure.I2C_DigitalFilter = 0x00;
            I2C_InitStructure.I2C_OwnAddress1 = 0x30;
        I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
        I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
 
 
        I2C_InitStructure.I2C_Timing =0xB0420F13;
    I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
        I2C_Cmd(I2C2, ENABLE);
                I2C_Init(I2C2, &I2C_InitStructure);
 
I2C_ITConfig(I2C2, I2C_AcknowledgedAddress_7bit, ENABLE);
}

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