l6362A IO-link收发器芯片驱动代码示例

以下是一个基于STM32F4的L6362A IO-Link收发器芯片驱动代码示例：

#include "stm32f4xx.h"
#include "l6362a.h"

#define L6362A_I2C_TIMEOUT 1000

static void L6362A_I2C_Init(void)
{
    I2C_InitTypeDef i2c;
    GPIO_InitTypeDef gpio;

    /* Enable I2C and GPIO clocks */
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);

    /* Configure I2C pins */
    gpio.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_9;
    gpio.GPIO_Mode = GPIO_Mode_AF;
    gpio.GPIO_Speed = GPIO_Speed_50MHz;
    gpio.GPIO_OType = GPIO_OType_OD;
    gpio.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(GPIOB, &gpio);

    /* Connect I2C pins to AF */
    GPIO_PinAFConfig(GPIOB, GPIO_PinSource6, GPIO_AF_I2C1);
    GPIO_PinAFConfig(GPIOB, GPIO_PinSource9, GPIO_AF_I2C1);

    /* Configure I2C */
    I2C_DeInit(I2C1);
    i2c.I2C_Mode = I2C_Mode_I2C;
    i2c.I2C_DutyCycle = I2C_DutyCycle_2;
    i2c.I2C_ClockSpeed = 100000;
    i2c.I2C_OwnAddress1 = 0x00;
    i2c.I2C_Ack = I2C_Ack_Enable;
    i2c.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
    I2C_Init(I2C1, &i2c);

    /* Enable I2C */
    I2C_Cmd(I2C1, ENABLE);
}

static uint8_t L6362A_I2C_Read(uint8_t address)
{
    uint8_t data;

    /* Send start condition */
    I2C_GenerateSTART(I2C1, ENABLE);

    /* Wait for start condition to be sent */
    while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT))
    {
        if (--L6362A_I2C_TIMEOUT == 0)
        {
            /* Timeout */
            return 0xFF;
        }
    }

    /* Send device address and wait for ack */
    I2C_Send7bitAddress(I2C1, L6362A_I2C_ADDRESS << 1, I2C_Direction_Transmitter);
    while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED))
    {
        if (--L6362A_I2C_TIMEOUT == 0)
        {
            /* Timeout */
            return 0xFF;
        }
    }

    /* Send register address and wait for ack */
    I2C_SendData(I2C1, address);
    while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED))
    {
        if (--L6362A_I2C_TIMEOUT == 0)
        {
            /* Timeout */
            return 0xFF;
        }
    }

    /* Send repeated start condition */
    I2C_GenerateSTART(I2C1, ENABLE);

    /* Wait for start condition to be sent */
    while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT))
    {
        if (--L6362A_I2C_TIMEOUT == 0)
        {
            /* Timeout */
            return 0xFF;
        }
    }

    /* Send device address and wait for ack */
    I2C_Send7bitAddress(I2C1, L6362A_I2C_ADDRESS << 1, I2C_Direction_Receiver);
    while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED))
    {
        if (--L6362A_I2C_TIMEOUT == 0)
        {
            /* Timeout */
            return 0xFF;
        }
    }

    /* Disable ack */
    I2C_AcknowledgeConfig(I2C1, DISABLE);

    /* Wait for data to be received */
    while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED))
    {
        if (--L6362A_I2C_TIMEOUT == 0)
        {
            /* Timeout */
            return 0xFF;
        }
    }

    /* Read data */
    data = I2C_ReceiveData(I2C1);

    /* Send stop condition */
    I2C_GenerateSTOP(I2C1, ENABLE);

    /* Enable ack */
    I2C_AcknowledgeConfig(I2C1, ENABLE);

    return data;
}

static void L6362A_I2C_Write(uint8_t address, uint8_t data)
{
    /* Send start condition */
    I2C_GenerateSTART(I2C1, ENABLE);

    /* Wait for start condition to be sent */
    while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT))
    {
        if (--L6362A_I2C_TIMEOUT == 0)
        {
            /* Timeout */
            return;
        }
    }

    /* Send device address and wait for ack */
    I2C_Send7bitAddress(I2C1, L6362A_I2C_ADDRESS << 1, I2C_Direction_Transmitter);
    while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED))
    {
        if (--L6362A_I2C_TIMEOUT == 0)
        {
            /* Timeout */
            return;
        }
    }

    /* Send register address and wait for ack */
    I2C_SendData(I2C1, address);
    while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED))
    {
        if (--L6362A_I2C_TIMEOUT == 0)
        {
            /* Timeout */
            return;
        }
    }

    /* Send data and wait for ack */
    I2C_SendData(I2C1, data);
    while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED))
    {
        if (--L6362A_I2C_TIMEOUT == 0)
        {
            /* Timeout */
            return;
        }
    }

    /* Send stop condition */
    I2C_GenerateSTOP(I2C1, ENABLE);
}

void L6362A_Init(void)
{
    /* Initialize I2C */
    L6362A_I2C_Init();

    /* Write configuration registers */
    L6362A_I2C_Write(L6362A_REG_CFG1, L6362A_CFG1_VALUE);
    L6362A_I2C_Write(L6362A_REG_CFG2, L6362A_CFG2_VALUE);
    L6362A_I2C_Write(L6362A_REG_CFG3, L6362A_CFG3_VALUE);
}

uint8_t L6362A_Read(uint8_t address)
{
    return L6362A_I2C_Read(address);
}

void L6362A_Write(uint8_t address, uint8_t data)
{
    L6362A_I2C_Write(address, data);
}

在这个示例中，我们使用了STM32F4的I2C接口来与L6362A IO-Link收发器进行通信。`L6362A_I2C_Init`函数用于初始化I2C接口，`L6362A_I2C_Read`和`L6362A_I2C_Write`函数分别用于读取和写入寄存器的值。`L6362A_Init`函数用于初始化L6362A芯片的配置寄存器。最后，`L6362A_Read`和`L6362A_Write`函数分别用于对外提供读取和写入寄存器的接口。