io -r -l 0x100 0xff970000

这是一条命令，意思是从地址0xff970000处读取一个长度为0x100的数据块，并将其打印到屏幕上（以16进制格式显示）。这个命令通常用于调试和检查存储器中特定位置的内容。具体地说，"io"表示使用I/O端口进行读取，"-r"表示执行读取操作，"-l"表示数据块长度为0x100，"0xff970000"表示要读取的数据块的起始地址。

相关问题

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。

一个IO-Link通信收发器设备IC，用STM32标准库驱动L6362的示例

以下是一个使用STM32标准库驱动L6362的IO-Link通信收发器设备IC的示例代码：

#include "stm32f4xx.h"
#include "stm32f4xx_gpio.h"
#include "stm32f4xx_rcc.h"
#include "stm32f4xx_usart.h"

#define IO_LINK_TX_PIN GPIO_Pin_9
#define IO_LINK_RX_PIN GPIO_Pin_10
#define IO_LINK_GPIO GPIOA
#define IO_LINK_USART USART1

void IO_Link_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  USART_InitTypeDef USART_InitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;
  
  // Enable clock for GPIOA and USART1
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);

  // Configure IO-Link TX pin (PA9) as alternate function push-pull
  GPIO_InitStructure.GPIO_Pin = IO_LINK_TX_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;
  GPIO_Init(IO_LINK_GPIO, &GPIO_InitStructure);

  // Configure IO-Link RX pin (PA10) as input floating
  GPIO_InitStructure.GPIO_Pin = IO_LINK_RX_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
  GPIO_Init(IO_LINK_GPIO, &GPIO_InitStructure);

  // Connect PA9 to USART1_Tx
  GPIO_PinAFConfig(IO_LINK_GPIO, GPIO_PinSource9, GPIO_AF_USART1);

  // Connect PA10 to USART1_Rx
  GPIO_PinAFConfig(IO_LINK_GPIO, GPIO_PinSource10, GPIO_AF_USART1);

  // Configure USART1
  USART_InitStructure.USART_BaudRate = 230400;
  USART_InitStructure.USART_WordLength = USART_WordLength_8b;
  USART_InitStructure.USART_StopBits = USART_StopBits_1;
  USART_InitStructure.USART_Parity = USART_Parity_No;
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
  USART_Init(IO_LINK_USART, &USART_InitStructure);

  // Enable USART1 receive interrupt
  USART_ITConfig(IO_LINK_USART, USART_IT_RXNE, ENABLE);

  // Configure NVIC
  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

  // Enable USART1
  USART_Cmd(IO_LINK_USART, ENABLE);
}

void USART1_IRQHandler(void)
{
  // Handle USART1 receive interrupt
  if (USART_GetITStatus(IO_LINK_USART, USART_IT_RXNE) != RESET)
  {
    // Read data from USART1 receive buffer
    uint16_t data = USART_ReceiveData(IO_LINK_USART);

    // Process received data
    // ...

    // Clear USART1 receive interrupt flag
    USART_ClearITPendingBit(IO_LINK_USART, USART_IT_RXNE);
  }
}

void IO_Link_Transmit(uint8_t *data, uint16_t length)
{
  // Wait for USART1 transmit buffer to be empty
  while (USART_GetFlagStatus(IO_LINK_USART, USART_FLAG_TXE) == RESET);

  // Send start bit
  USART_SendData(IO_LINK_USART, 0x00);

  // Send data bytes
  for (uint16_t i = 0; i < length; i++)
  {
    // Wait for USART1 transmit buffer to be empty
    while (USART_GetFlagStatus(IO_LINK_USART, USART_FLAG_TXE) == RESET);

    // Send data byte
    USART_SendData(IO_LINK_USART, data[i]);
  }

  // Wait for USART1 transmit buffer to be empty
  while (USART_GetFlagStatus(IO_LINK_USART, USART_FLAG_TXE) == RESET);

  // Send stop bit
  USART_SendData(IO_LINK_USART, 0xFF);
}

在这个示例中，我们使用了STM32的USART1串口来与L6362进行通信。我们将PA9和PA10引脚分别用作USART1的Tx和Rx引脚，并且使用了230400波特率进行通信。在初始化IO-Link设备之后，我们开启了USART1的接收中断，并且在USART1_IRQHandler函数中处理了接收到的数据。在IO_Link_Transmit函数中，我们使用了帧格式化方法发送数据给IO-Link设备。

请注意，本示例代码仅供参考，实际应用中的具体实现方式可能会因为硬件和软件环境的不同而有所不同。