编写一段I2C驱动代码

以下是一个简单的I2C驱动代码示例，仅供参考：

#include <stdint.h>
#include <stdbool.h>
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "driverlib/gpio.h"
#include "driverlib/pin_map.h"
#include "driverlib/i2c.h"
#include "driverlib/sysctl.h"

#define I2C_SLAVE_ADDRESS   0x50

void I2C_Init(void)
{
    // Enable I2C0
    SysCtlPeripheralEnable(SYSCTL_PERIPH_I2C0);

    // Enable GPIOB
    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);

    // Configure PB2 as SDA and PB3 as SCL
    GPIOPinConfigure(GPIO_PB2_I2C0SDA);
    GPIOPinConfigure(GPIO_PB3_I2C0SCL);
    GPIOPinTypeI2CSCL(GPIO_PORTB_BASE, GPIO_PIN_3);
    GPIOPinTypeI2C(GPIO_PORTB_BASE, GPIO_PIN_2);

    // Configure I2C0
    I2CMasterInitExpClk(I2C0_BASE, SysCtlClockGet(), false);

    // Set slave address
    I2CMasterSlaveAddrSet(I2C0_BASE, I2C_SLAVE_ADDRESS, false);
}

void I2C_Write(uint8_t *data, uint8_t numBytes)
{
    uint8_t i;

    // Send start condition
    I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_SINGLE_SEND);
    while(I2CMasterBusy(I2C0_BASE));

    // Send data
    for (i = 0; i < numBytes; i++)
    {
        I2CMasterDataPut(I2C0_BASE, data[i]);
        I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_BURST_SEND_CONT);
        while(I2CMasterBusy(I2C0_BASE));
    }

    // Send stop condition
    I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_BURST_SEND_FINISH);
    while(I2CMasterBusy(I2C0_BASE));
}

void I2C_Read(uint8_t *data, uint8_t numBytes)
{
    uint8_t i;

    // Send start condition
    I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_SINGLE_SEND);
    while(I2CMasterBusy(I2C0_BASE));

    // Send slave address with read bit set
    I2CMasterSlaveAddrSet(I2C0_BASE, I2C_SLAVE_ADDRESS, true);
    I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_BURST_RECEIVE_START);
    while(I2CMasterBusy(I2C0_BASE));

    // Receive data
    for (i = 0; i < numBytes - 1; i++)
    {
        I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_BURST_RECEIVE_CONT);
        while(I2CMasterBusy(I2C0_BASE));
        data[i] = I2CMasterDataGet(I2C0_BASE);
    }

    // Receive last byte of data
    I2CMasterControl(I2C0_BASE, I2C_MASTER_CMD_BURST_RECEIVE_FINISH);
    while(I2CMasterBusy(I2C0_BASE));
    data[numBytes-1] = I2CMasterDataGet(I2C0_BASE);
}

这个代码片段演示了如何使用TI Tiva C系列微控制器的I2C模块。它包括初始化I2C模块、写入数据和读取数据的函数。请注意，此代码片段仅适用于特定的硬件平台和运行时库版本。如果你要在其他平台上使用I2C驱动程序，请根据需要进行修改。