使用STM32红牛开发的GPIO模拟I2C控制八个AT24C02的读写

SCLL;

wait(10);

}

void GPIOC_Config_IN(void)

{

GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIO_MONII2C_SDA | RCC_APB2Periph_GPIOC , ENABLE);

/* moni SPI pins: SDA */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; //输入上拉

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOC, &GPIO_InitStructure);

}

void GPIOC_Config_OUT(void)

{

GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIO_MONII2C_SDA | RCC_APB2Periph_GPIOC , ENABLE);

/* moni SPI pins: SDA */

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD; //开漏输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOC, &GPIO_InitStructure);

}

void I2C_EE_PageRead(u8* pBuffer, u16 ReadAddr, u16 NumByteToRead)

{

u16 i=0;

/* Send START condition */

I2C_GenerateSTART();

I2C_SendData(I2C_SLAVE_ADDRESS7_W);

//I2C_SLAVE_ADDRESS7=0xa0,伪写操作

WaitAck();

/* Send the EEPROM's internal address to write to */

I2C_SendData(ReadAddr);

WaitAck();

/* Send STRAT condition a second time */

I2C_GenerateSTART();

I2C_SendData(I2C_SLAVE_ADDRESS7_R);

//I2C_SLAVE_ADDRESS7=0xa1,读操作