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使用 AT21CS01 和 TM4C129EKCPDT 快速恢复意外错误

单线串行 EEPROM

SWI EEPROM Click with Fusion for Tiva v8

已发布 6月 24, 2024

点击板

SWI EEPROM Click

开发板

Fusion for Tiva v8

编译器

NECTO Studio

微控制器单元

TM4C129EKCPDT

我们的解决方案利用单线EEPROM存储校准值、使用历史和设备特定信息,简化维护并提高整体效率。

A

A

硬件概览

它是如何工作的?

SWI EEPROM Click基于AT21CS01,这是一款由Microchip Technology提供的2针串行电可擦写可编程只读存储器(EEPROM),通过SI/O引脚收集能量为集成电路供电。它提供1,024位内存,组织为128个8位字,具有64位工厂编程序列号的安全寄存器,以及额外16字节的用户可编程和永久锁定存储。它提供了一个保证唯一的序列号用于库存跟踪和资产标记,并且在需要时可以始终保护数据。AT21CS01具有100年的数据保持能力,结合了前所未有的

数据存储和出色的能效。它以高可靠性和超高写入耐久性为特点,使每个内存位置能够进行超过一百万次循环,以满足当今高写入耐久性应用的要求。SWI EEPROM Click使用单线接口与MCU通信,根据定义,仅需要一条数据线(和地线)与MCU通信。路由到mikroBUS™插座PWM引脚的SI/O引脚是一个双向输入/输出引脚,用于串行传输数据到设备和从设备传输数据,在标准速度模式下的最大比特率为15.4Kbps,高速模式下为125Kbps。AT21CS01使用修改后的

I2C接口从读取和写入序列中提取电力。发送到设备的软件序列模拟了发送到I2C串行EEPROM的内容,除了一个4位操作码取代了设备地址中的典型4位设备类型标识符1010b。该设备被设计用于快速部署和显著重用现有I2C固件。此Click板™只能在3.3V逻辑电压水平下运行。使用具有不同逻辑电平的MCU之前,必须进行适当的逻辑电压电平转换。此外,它配有包含函数和示例代码的库,可用作进一步开发的参考。

SWI EEPROM Click top side image
SWI EEPROM Click bottom side image

功能概述

开发板

Fusion for TIVA v8 是一款专为快速开发嵌入式应用的需求而特别设计的开发板。它支持广泛的微控制器,如不同的32位ARM® Cortex®-M基础MCUs,来自Texas Instruments,无论它们的引脚数量如何,并且具有一系列独特功能,例如首次通过WiFi网络实现的嵌入式调试器/程序员。开发板布局合理,设计周到,使得最终用户可以在一个地方找到所有必要的元素,如开关、按钮、指示灯、连接器等。得益于创新的制造技术,Fusion for TIVA v8 提供了流畅而沉浸式的工作体验,允许在任何情况下、任何地方、任何

时候都能访问。Fusion for TIVA v8开发板的每个部分都包含了使同一板块运行最高效的必要组件。一个先进的集成CODEGRIP程序/调试模块提供许多有价值的编程/调试选项,包括对JTAG、SWD和SWO Trace(单线输出)的支持,并与Mikroe软件环境无缝集成。此外,它还包括一个干净且调节过的开发板电源供应模块。它可以使用广泛的外部电源,包括电池、外部12V电源供应和通过USB Type-C(USB-C)连接器的电源。通信选项如USB-UART、USB HOST/DEVICE、CAN(如果MCU卡支持的话)和以

太网也包括在内。此外,它还拥有广受好评的 mikroBUS™标准,为MCU卡提供了标准化插座(SiBRAIN标准),以及两种显示选项,用于TFT板线产品和基于字符的LCD。Fusion for TIVA v8 是Mikroe快速开发生态系统的一个组成部分。它由Mikroe软件工具原生支持,得益于大量不同的Click板™(超过一千块板),其数量每天都在增长,它涵盖了原型制作和开发的许多方面。

Fusion for Tiva v8 horizontal image

微控制器概述 

MCU卡片 / MCU

default

类型

8th Generation

建筑

ARM Cortex-M4

MCU 内存 (KB)

512

硅供应商

Texas Instruments

引脚数

128

RAM (字节)

262144

使用的MCU引脚

mikroBUS™映射器

NC
NC
AN
NC
NC
RST
NC
NC
CS
NC
NC
SCK
NC
NC
MISO
NC
NC
MOSI
Power Supply
3.3V
3.3V
Ground
GND
GND
Single-Wire Data IN/OUT
PL4
PWM
NC
NC
INT
NC
NC
TX
NC
NC
RX
NC
NC
SCL
NC
NC
SDA
NC
NC
5V
Ground
GND
GND
1

“仔细看看!”

Click board™ 原理图

SWI EEPROM Click Schematic schematic

一步一步来

项目组装

Fusion for PIC v8 front image hardware assembly

从选择您的开发板和Click板™开始。以Fusion for Tiva v8作为您的开发板开始。

Fusion for PIC v8 front image hardware assembly
Buck 22 Click front image hardware assembly
SiBRAIN for PIC32MZ1024EFK144 front image hardware assembly
v8 SiBRAIN MB 1 - upright/background hardware assembly
Necto image step 2 hardware assembly
Necto image step 3 hardware assembly
Necto image step 4 hardware assembly
NECTO Compiler Selection Step Image hardware assembly
NECTO Output Selection Step Image hardware assembly
Necto image step 6 hardware assembly
Necto image step 7 hardware assembly
Necto image step 8 hardware assembly
Necto image step 9 hardware assembly
Necto image step 10 hardware assembly
Necto PreFlash Image hardware assembly

实时跟踪您的结果

应用程序输出

1. 应用程序输出 - 在调试模式下,“应用程序输出”窗口支持实时数据监控,直接提供执行结果的可视化。请按照提供的教程正确配置环境,以确保数据正确显示。

2. UART 终端 - 使用UART Terminal通过USB to UART converter监视数据传输,实现Click board™与开发系统之间的直接通信。请根据项目需求配置波特率和其他串行设置,以确保正常运行。有关分步设置说明,请参考提供的教程

3. Plot 输出 - Plot功能提供了一种强大的方式来可视化实时传感器数据,使趋势分析、调试和多个数据点的对比变得更加直观。要正确设置,请按照提供的教程,其中包含使用Plot功能显示Click board™读数的分步示例。在代码中使用Plot功能时,请使用以下函数:plot(insert_graph_name, variable_name);。这是一个通用格式,用户需要将“insert_graph_name”替换为实际图表名称,并将“variable_name”替换为要显示的参数。

软件支持

库描述

该库包含 SWI EEPROM Click 驱动程序的 API。

关键功能:

  • swieeprom_mem_write_page - 此函数将数据写入指定的内存地址页。

  • swieeprom_mem_read - 此函数从指定的内存地址读取数据。

  • swieeprom_mem_clear - 此函数将整个内存清零。

开源

代码示例

完整的应用程序代码和一个现成的项目可以通过NECTO Studio包管理器直接安装到NECTO Studio 应用程序代码也可以在MIKROE的GitHub账户中找到。

/*!
 * @file main.c
 * @brief SWI EEPROM Click Example.
 *
 * # Description
 * This example demonstrates the use of SWI EEPROM click board by writing specified data to
 * the memory and reading it back.
 *
 * The demo application is composed of two sections :
 *
 * ## Application Init
 * Initializes the driver and logger and checks the communication.
 *
 * ## Application Task
 * Writes the specified text message to the memory and reads it back. After that, erases
 * the whole memory and tries to read the same message verifying that the memory is erased.
 * All data is being displayed on the USB UART where you can track the program flow.
 *
 * @note
 * This application is written for the following MCUs and specifically for MIKROBUS 1:
 * STM32F407ZG, MK64FN1M0VDC12, TM4C129XNCZAD, GD32VF103VBT6, PIC32MX795F512L
 * In order to use it on another MCUs the pin_x functions must be defined in a way
 * it matches the required timing specifications for the Single Wire interface.
 *
 * @author Stefan Filipovic
 *
 */

#include "board.h"
#include "log.h"
#include "swieeprom.h"

#define DEMO_TEXT_MESSAGE       "MIKROE"
#define STARTING_ADDRESS        0x00

static swieeprom_t swieeprom;   /**< SWI EEPROM Click driver object. */
static log_t logger;    /**< Logger object. */

/**
 * @brief Pin init function.
 * @details This function initializes the SIO pin.
 * @return None.
 * @note By default it initializes the SIO pin to the PWM pin from MIKROBUS 1.
 * The implementation differs from MCU to MCU.
 */
static void pin_init( void );

/**
 * @brief Pin low function.
 * @details This function sets the SIO pin to LOW logic level.
 * @return None.
 * @note The pin it uses should match the one that is initialized using the pin_init function.
 * The implementation differs from MCU to MCU.
 */
static void pin_low( void );

/**
 * @brief Pin release function.
 * @details This function releases the SIO pin by setting it to digital input.
 * @return None.
 * @note The pin it uses should match the one that is initialized using the pin_init function.
 * The implementation differs from MCU to MCU.
 */
static void pin_release( void );

/**
 * @brief Pin get function.
 * @details This function returns the SIO pin logic state.
 * @return Pin logic state.
 * @note The pin it uses should match the one that is initialized using the pin_init function.
 * The implementation differs from MCU to MCU.
 */
static uint8_t pin_get( void );

/**
 * @brief SWI EEPROM reset function.
 * @details This function initializes the SIO pin and performs the SWI reset.
 * @return @li @c  0 - Success,
 *         @li @c -1 - Error.
 * See #err_t definition for detailed explanation.
 * @note None.
 */
static err_t swieeprom_reset ( void );

/**
 * @brief SWI EEPROM start stop function.
 * @details This function sends the SWI start/stop signal.
 * @return None.
 * @note None.
 */
static void swieeprom_start_stop ( void );

/**
 * @brief SWI EEPROM logic write 0 function.
 * @details This function sends the SWI logic zero signal.
 * @return None.
 * @note None.
 */
static void swieeprom_logic_write_0 ( void );

/**
 * @brief SWI EEPROM logic write 1 function.
 * @details This function sends the SWI logic one signal.
 * @return None.
 * @note None.
 */
static void swieeprom_logic_write_1 ( void );

/**
 * @brief SWI EEPROM logic read function.
 * @details This function reads the SWI logic state.
 * @return None.
 * @note None.
 */
static uint8_t swieeprom_logic_read ( void );

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );

    // Click initialization.
    swieeprom.swi_reset = &swieeprom_reset;
    swieeprom.swi_start_stop = &swieeprom_start_stop;
    swieeprom.swi_logic_0 = &swieeprom_logic_write_0;
    swieeprom.swi_logic_1 = &swieeprom_logic_write_1;
    swieeprom.swi_logic_read = &swieeprom_logic_read;
    if ( SWIEEPROM_ERROR == swieeprom_init ( &swieeprom ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    if ( SWIEEPROM_ERROR == swieeprom_check_communication ( &swieeprom ) )
    {
        log_error( &logger, " Check communication." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
}

void application_task ( void ) 
{
    uint8_t data_buf[ 8 ] = { 0 };
    // Write data to the specified address
    log_printf ( &logger, " Memory address: 0x%.2X\r\n", ( uint16_t ) STARTING_ADDRESS );
    memcpy ( data_buf, DEMO_TEXT_MESSAGE, strlen ( DEMO_TEXT_MESSAGE ) );
    if ( SWIEEPROM_OK == swieeprom_mem_write_page ( &swieeprom, STARTING_ADDRESS, 
                                                    data_buf, strlen ( DEMO_TEXT_MESSAGE ) ) )
    {
        log_printf ( &logger, " Write data: %s\r\n", data_buf );
        Delay_ms ( 100 );
    }
    // Read data from the specified address to verify the previous memory write
    memset ( data_buf, 0, sizeof ( data_buf ) );
    if ( SWIEEPROM_OK == swieeprom_mem_read ( &swieeprom, STARTING_ADDRESS, 
                                              data_buf, sizeof ( data_buf ) ) )
    {
        log_printf ( &logger, " Read data: %s\r\n", data_buf );
        Delay_ms ( 2000 );
    }
    // Clear whole memory
    if ( SWIEEPROM_OK == swieeprom_mem_clear ( &swieeprom ) )
    {
        log_printf ( &logger, " Memory clear\r\n" );
        Delay_ms ( 100 );
    }
    // Read data from the specified address to verify the previous memory clear
    memset ( data_buf, 0, sizeof ( data_buf ) );
    if ( SWIEEPROM_OK == swieeprom_mem_read ( &swieeprom, STARTING_ADDRESS, 
                                              data_buf, sizeof ( data_buf ) ) )
    {
        log_printf ( &logger, " Read data: %s\r\n\n", data_buf );
        Delay_ms ( 2000 );
    }
}

int main ( void ) 
{
    application_init( );
    
    for ( ; ; ) 
    {
        application_task( );
    }

    return 0;
}

#ifdef __MIKROC_AI__
    #ifdef STM32F407ZG
        void pin_init( void ) 
        { 
            digital_in_t sio_in;
            digital_in_init ( &sio_in, PD12 );
        }

        void pin_low( void ) 
        { 
            if ( !GPIOD_MODER.B24 ) 
            { 
                GPIOD_MODER.B24 = 1; 
            }
            GPIOD_ODR.B12 = 0;
        }

        void pin_release( void )
        { 
            if ( GPIOD_MODER.B24 ) 
            { 
                GPIOD_MODER.B24 = 0; 
            }
        }

        uint8_t pin_get( void )
        {
            if ( GPIOD_MODER.B24 ) 
            { 
                GPIOD_MODER.B24 = 0; 
            }
            return GPIOD_IDR.B12;
        }
    #elif MK64FN1M0VDC12
        void pin_init( void ) 
        { 
            digital_in_t sio_in;
            digital_in_init ( &sio_in, PE6 );
        }

        void pin_low( void ) 
        { 
            if ( !GPIOE_PDDR.B6 ) 
            { 
                GPIOE_PDDR.B6 = 1; 
            }
            GPIOE_PDOR.B6 = 0;
        }

        void pin_release( void )
        { 
            if ( GPIOE_PDDR.B6 ) 
            { 
                GPIOE_PDDR.B6 = 0; 
            }
        }

        uint8_t pin_get( void )
        {
            if ( GPIOE_PDDR.B6 ) 
            { 
                GPIOE_PDDR.B6 = 0; 
            }
            return GPIOE_PDIR.B6;
        }
    #elif TM4C129XNCZAD
        void pin_init( void ) 
        { 
            digital_in_t sio_in;
            digital_in_init ( &sio_in, PD0 );
        }

        void pin_low( void ) 
        { 
            if ( !GPIO_PORTD_AHB_DIR.B0 ) 
            { 
                GPIO_PORTD_AHB_DIR.B0 = 1; 
            }
            GPIO_PORTD_AHB_DATA.B0 = 0;
        }

        void pin_release( void )
        { 
            if ( GPIO_PORTD_AHB_DIR.B0 ) 
            { 
                GPIO_PORTD_AHB_DIR.B0 = 0; 
            }
        }

        uint8_t pin_get( void )
        {
            if ( GPIO_PORTD_AHB_DIR.B0 ) 
            { 
                GPIO_PORTD_AHB_DIR.B0 = 0; 
            }
            return GPIO_PORTD_AHB_DATA.B0;
        }
    #elif PIC32MX795F512L
        void pin_init( void ) 
        { 
            digital_in_t sio_in;
            digital_in_init ( &sio_in, PD1 );
        }

        void pin_low( void ) 
        { 
            if ( TRISD1_bit ) 
            { 
                TRISD1_bit = 0; 
            }
            LATD1_bit = 0;
        }

        void pin_release( void )
        { 
            if ( !TRISD1_bit ) 
            { 
                TRISD1_bit = 1; 
            }
        }

        uint8_t pin_get( void )
        {
            if ( !TRISD1_bit ) 
            { 
                TRISD1_bit = 1; 
            }
            return RD1_bit;
        }
    #elif dsPIC33FJ256GP710A
        void pin_init( void ) 
        { 
            digital_in_t sio_in;
            digital_in_init ( &sio_in, PD1 );
        }

        void pin_low( void ) 
        { 
            if ( TRISD1_bit ) 
            { 
                TRISD1_bit = 0; 
            }
            LATD1_bit = 0;
        }

        void pin_release( void )
        { 
            if ( !TRISD1_bit ) 
            { 
                TRISD1_bit = 1; 
            }
        }

        uint8_t pin_get( void )
        {
            if ( !TRISD1_bit ) 
            { 
                TRISD1_bit = 1; 
            }
            return RD1_bit;
        }
    #else
        #error "Pin functions are not defined for the selected MCU"
    #endif
#elif __GNUC__
    #ifdef STM32F407ZG
        #define GPIOD_MODER             ( *( uint32_t * ) 0x40020C00 )
        #define GPIOD_IDR               ( *( uint32_t * ) 0x40020C10 )
        #define GPIOD_ODR               ( *( uint32_t * ) 0x40020C14 )
        #define GPIO_MODER_PIN12_MASK   ( ( uint32_t ) 3 << 24 )
        #define GPIO_MODER_PIN12_INPUT  ( ( uint32_t ) 0 << 24 )
        #define GPIO_MODER_PIN12_OUTPUT ( ( uint32_t ) 1 << 24 )
        #define GPIO_PIN12_MASK         ( ( uint32_t ) 1 << 12 )
        void pin_init( void ) 
        { 
            digital_in_t sio_in;
            digital_in_init ( &sio_in, PD12 );
        }

        void pin_low( void ) 
        { 
            if ( GPIO_MODER_PIN12_OUTPUT != ( GPIOD_MODER & GPIO_MODER_PIN12_MASK ) ) 
            { 
                GPIOD_MODER &= ~GPIO_MODER_PIN12_MASK;
                GPIOD_MODER |= GPIO_MODER_PIN12_OUTPUT;
            }
            GPIOD_ODR &= ~GPIO_PIN12_MASK;
        }

        void pin_release( void )
        { 
            if ( GPIO_MODER_PIN12_INPUT != ( GPIOD_MODER & GPIO_MODER_PIN12_MASK ) ) 
            { 
                GPIOD_MODER &= ~GPIO_MODER_PIN12_MASK;
            }
        }
    
        uint8_t pin_get( void )
        {
            if ( GPIO_MODER_PIN12_INPUT != ( GPIOD_MODER & GPIO_MODER_PIN12_MASK ) ) 
            { 
                GPIOD_MODER &= ~GPIO_MODER_PIN12_MASK;
            }
            return ( GPIO_PIN12_MASK == ( GPIOD_IDR & GPIO_PIN12_MASK ) );
        }
    #elif MK64
        #define GPIOE_PDOR              ( *( uint32_t * ) 0x400FF100 )
        #define GPIOE_PDIR              ( *( uint32_t * ) 0x400FF110 )
        #define GPIOE_PDDR              ( *( uint32_t * ) 0x400FF114 )
        #define GPIO_PDDR_PIN6_INPUT    ( ( uint32_t ) 0 << 6 )
        #define GPIO_PDDR_PIN6_OUTPUT   ( ( uint32_t ) 1 << 6 )
        #define GPIO_PIN6_MASK          ( ( uint32_t ) 1 << 6 )
        void pin_init( void ) 
        { 
            digital_in_t sio_in;
            digital_in_init ( &sio_in, PE6 );
        }

        void pin_low( void ) 
        { 
            if ( GPIO_PDDR_PIN6_OUTPUT != ( GPIOE_PDDR & GPIO_PIN6_MASK ) ) 
            { 
                GPIOE_PDDR |= GPIO_PDDR_PIN6_OUTPUT;
            }
            GPIOE_PDOR &= ~GPIO_PIN6_MASK;
        }

        void pin_release( void )
        { 
            if ( GPIO_PDDR_PIN6_INPUT != ( GPIOE_PDDR & GPIO_PIN6_MASK ) ) 
            { 
                GPIOE_PDDR &= ~GPIO_PDDR_PIN6_OUTPUT;
            }
        }
    
        uint8_t pin_get( void )
        {
            if ( GPIO_PDDR_PIN6_INPUT != ( GPIOE_PDDR & GPIO_PIN6_MASK ) ) 
            { 
                GPIOE_PDDR &= ~GPIO_PDDR_PIN6_OUTPUT;
            }
            return ( GPIO_PIN6_MASK == ( GPIOE_PDIR & GPIO_PIN6_MASK ) );
        }
    #elif GD32VF103VBT6
        #define GPIOC9_CTL1_MASK    ( ( uint32_t ) 0x000000F0 )
        #define GPIOC9_IO_MASK      ( ( uint32_t ) 0x00000200 )
        #define GPIOC_CTL1          ( *( uint32_t * ) 0x40011004 )
        #define GPIOC_ISTAT         ( *( uint32_t * ) 0x40011008 )
        #define GPIOC_OCTL          ( *( uint32_t * ) 0x4001100C )

        void pin_init( void ) 
        {
            static digital_in_t sio_in;
            digital_in_init ( &sio_in, PC9 );
        }

        void pin_low( void ) 
        { 
            if ( ( GPIO_CFG_DIGITAL_INPUT << 4 ) == ( GPIOC_CTL1 & GPIOC9_CTL1_MASK ) ) 
            { 
                GPIOC_CTL1 = ( GPIOC_CTL1 & ~( GPIOC9_CTL1_MASK ) ) | ( GPIO_CFG_DIGITAL_OUTPUT << 4 );
            }
            GPIOC_OCTL &= ~GPIOC9_IO_MASK;
        }

        void pin_release( void )
        { 
            if ( ( GPIO_CFG_DIGITAL_OUTPUT << 4 ) == ( GPIOC_CTL1 & GPIOC9_CTL1_MASK ) ) 
            { 
                GPIOC_CTL1 = ( GPIOC_CTL1 & ~( GPIOC9_CTL1_MASK ) ) | ( GPIO_CFG_DIGITAL_INPUT << 4 );
            }
        }

        uint8_t pin_get( void )
        {
            if ( ( GPIO_CFG_DIGITAL_OUTPUT << 4 ) == ( GPIOC_CTL1 & GPIOC9_CTL1_MASK ) ) 
            { 
                GPIOC_CTL1 = ( GPIOC_CTL1 & ~( GPIOC9_CTL1_MASK ) ) | ( GPIO_CFG_DIGITAL_INPUT << 4 );
            }
            return ( GPIOC9_IO_MASK == ( GPIOC_ISTAT & GPIOC9_IO_MASK ) );
        }
    #else
        #error "Pin functions are not defined for the selected MCU"
    #endif
#else
    #error "Pin functions are not defined for the selected toolchain"
#endif

static err_t swieeprom_reset ( void )
{
    // Pin initialization
    pin_init ( );
    
    // Reset
    pin_low ( );
    // tDSCHG delay: 150+us
    Delay_80us( );
    Delay_80us( );
    pin_release ( );
    // tRRT delay: 8+us
    Delay_10us( );
    
    // Discovery
    pin_low ( );
    // tDRR delay: 1-2us
    Delay_1us( );
    pin_release ( );
    // tDACK delay: 8-24us
    Delay_9us( );
    
    if ( pin_get ( ) )
    {
        return SWIEEPROM_ERROR;
    }
    return SWIEEPROM_OK;
}

static void swieeprom_start_stop ( void )
{
    pin_release ( );
    // tHTSS delay: 150+us
    Delay_80us( );
    Delay_80us( );
}

static void swieeprom_logic_write_0 ( void )
{
    pin_low ( );
    // tLOW0 delay: 6-16us
    Delay_10us( );
    pin_release ( );
    // tBIT - tLOW0 delay: 8-24us - 6-16us
    Delay_6us( );
}

static void swieeprom_logic_write_1 ( void )
{
    pin_low ( );
    // tLOW1 delay: 1-2us
    Delay_1us( );
    pin_release ( );
    // tBIT - tLOW1 delay: 8-24us - 1-2us
    Delay_10us( );
    Delay_5us( );
}

static uint8_t swieeprom_logic_read ( void )
{
    pin_low ( );
    // tRD delay: 1-2us
    Delay_1us( );
    pin_release ( );
    // tMRS delay: 1-2us
    Delay_1us( );
    uint8_t pin_state = pin_get ( );
    // tBIT - tRD - tMRS delay: 8-24us - 1-2us - 1-2us
    Delay_9us( );
    Delay_5us( );
    return pin_state;
}

// ------------------------------------------------------------------------ END

额外支持

资源

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