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A diagnosis device is designed, which can diagnose vehicle state through standard port of the On-Board Diagnostics Ⅱ (OBD Ⅱ). Its software is designed based on STM32 single chip microcomputer, the physics layer communicates with vehicle gateway via CAN, the communication standard abides by the Unified Diagnostic Services (UDS) protocol and operates in three modes, i.e. communication with cell phone via Bluetooth, communication with computer via serial port connection, and operate offline via command memory. The embedded software is developed by hierarchical architecture based on C programming language.
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设计了一种嵌入式诊断仪,通过汽车第二代车载诊断系统(OBD Ⅱ)标准接口实现对车辆状态的诊断。诊断仪硬件基于STM32单片机开发,物理层通过CAN接口与车辆网关通信,通信标准遵守统一诊断服务(UDS)协议,具有3种工作模式,即通过蓝牙连接手机通信、通过串行接口连接计算机通信、通过指令记忆离线工作,并基于C语言采用分层架构进行了软件的嵌入式开发。
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主控制器最小系统电路, figureFileSmall=52CNlx13SXQBb8+/62v+Bg==, figureFileBig=jFDxN+2dYznEfhN+5v2nTQ==, tableContent=null), ArticleFig(id=1200066418969510422, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=EN, label=null, caption=null, figureFileSmall=IeM3G2e8W+eKGDnLbJCbHw==, figureFileBig=hcbUmDBdSsaUBY3Pu24uFQ==, tableContent=null), ArticleFig(id=1200066419162448416, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=CN, label=图4, caption=
电源模块电路, figureFileSmall=IeM3G2e8W+eKGDnLbJCbHw==, figureFileBig=hcbUmDBdSsaUBY3Pu24uFQ==, tableContent=null), ArticleFig(id=1200066419334414888, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=EN, label=null, caption=null, figureFileSmall=0KfwKOuEKtMQ38BfuALM+Q==, figureFileBig=lByvuiIElR/vi8FJ4MoPqA==, tableContent=null), ArticleFig(id=1200066419472826931, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=CN, label=图5, caption=
CAN收发器电路, figureFileSmall=0KfwKOuEKtMQ38BfuALM+Q==, figureFileBig=lByvuiIElR/vi8FJ4MoPqA==, tableContent=null), ArticleFig(id=1200066419577684538, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=EN, label=null, caption=null, figureFileSmall=TwGwF/fL8OE8TM9eCrrOSw==, figureFileBig=SFW+nnC9FAZ9Np4Hc1MvQQ==, tableContent=null), ArticleFig(id=1200066419678347841, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=CN, label=图6, caption=
蓝牙模块接口电路, figureFileSmall=TwGwF/fL8OE8TM9eCrrOSw==, figureFileBig=SFW+nnC9FAZ9Np4Hc1MvQQ==, tableContent=null), ArticleFig(id=1200066419779011145, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=EN, label=null, caption=null, figureFileSmall=FIXSo6xj433kMU/NzmZRkA==, figureFileBig=D6biS+iqJVW8bzNM+EbaoQ==, tableContent=null), ArticleFig(id=1200066419892257361, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=CN, label=图7, caption=
TF卡存储模块电路, figureFileSmall=FIXSo6xj433kMU/NzmZRkA==, figureFileBig=D6biS+iqJVW8bzNM+EbaoQ==, tableContent=null), ArticleFig(id=1200066419992920668, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=EN, label=null, caption=null, figureFileSmall=7Nh0mtVmD/QseS2375u2cg==, figureFileBig=R023nWX4pLlx/q0uYyq+pA==, tableContent=null), ArticleFig(id=1200066420101972579, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=CN, label=图8, caption=
串口模块电路, figureFileSmall=7Nh0mtVmD/QseS2375u2cg==, figureFileBig=R023nWX4pLlx/q0uYyq+pA==, tableContent=null), ArticleFig(id=1200066420257161838, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=EN, label=null, caption=null, figureFileSmall=t3mmsxBRoVBDjd1FRAtvRg==, figureFileBig=6uHYkYL1PB0hAV+Lgd0K6g==, tableContent=null), ArticleFig(id=1200066420387185273, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=CN, label=图9, caption=
声光指示模块电路, figureFileSmall=t3mmsxBRoVBDjd1FRAtvRg==, figureFileBig=6uHYkYL1PB0hAV+Lgd0K6g==, tableContent=null), ArticleFig(id=1200066420483654270, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=EN, label=null, caption=null, figureFileSmall=hypbLs15EG7SY80c6Azn9Q==, figureFileBig=pChyDOgDNAU8rOnkgY3oMg==, tableContent=null), ArticleFig(id=1200066421666448009, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=CN, label=图10, caption=
KL15光耦隔离电路, figureFileSmall=hypbLs15EG7SY80c6Azn9Q==, figureFileBig=pChyDOgDNAU8rOnkgY3oMg==, tableContent=null), ArticleFig(id=1200066421968437909, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=EN, label=null, caption=null, figureFileSmall=jgZHZeMcwdPZ/IwhraZW6g==, figureFileBig=flvkppffZgPdbxkLEE6L/A==, tableContent=null), ArticleFig(id=1200066422069101212, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=CN, label=图11, caption=
离线时钟电源模块电路, figureFileSmall=jgZHZeMcwdPZ/IwhraZW6g==, figureFileBig=flvkppffZgPdbxkLEE6L/A==, tableContent=null), ArticleFig(id=1200066422194930338, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=EN, label=null, caption=null, figureFileSmall=etrdI6r6W24aFwAV3pqfmg==, figureFileBig=IK/MnGqpD62HgeDKyq+/jQ==, tableContent=null), ArticleFig(id=1200066422324953769, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=CN, label=图12, caption=
OBD Ⅱ接口电路, figureFileSmall=etrdI6r6W24aFwAV3pqfmg==, figureFileBig=IK/MnGqpD62HgeDKyq+/jQ==, tableContent=null), ArticleFig(id=1200066422434005678, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=EN, label=null, caption=null, figureFileSmall=HKam0RO3r0z2CwLU8baoxw==, figureFileBig=hMkFGZc+x7YbPEYtc5LNmA==, tableContent=null), ArticleFig(id=1200066422538863286, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=CN, label=图13, caption=
诊断仪软件流程, figureFileSmall=HKam0RO3r0z2CwLU8baoxw==, figureFileBig=hMkFGZc+x7YbPEYtc5LNmA==, tableContent=null), ArticleFig(id=1200066422694052540, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 引脚 | 描述 | 引脚 | 描述 |
| Pin1 | 由整车制造商定义 | Pin9 | 由整车制造商定义 |
| Pin2 | SAE J1850总线正端 | Pin10 | SAE J1850总线负端 |
| Pin3 | 由整车制造商定义 | Pin11 | 由整车制造商定义 |
| Pin4 | 底盘接地 | Pin12 | 由整车制造商定义 |
| Pin5 | 信号接地 | Pin13 | 由整车制造商定义 |
| Pin6 | CAN总线高电平ISO 15765-4,SAE J2284 | Pin14 | CAN总线低电平ISO 15765-4,SAE J2284 |
| Pin7 | ISO 9141-2 / ISO 14230-4 K线 | Pin15 | ISO 9141-2 / ISO 14230-4 L线 |
| Pin8 | 由整车制造商定义 | Pin16 | 整车电源 |
), ArticleFig(id=1200066422866019015, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=CN, label=表1, caption=
OBD Ⅱ接口引脚定义
, figureFileSmall=null, figureFileBig=null, tableContent=
| 引脚 | 描述 | 引脚 | 描述 |
| Pin1 | 由整车制造商定义 | Pin9 | 由整车制造商定义 |
| Pin2 | SAE J1850总线正端 | Pin10 | SAE J1850总线负端 |
| Pin3 | 由整车制造商定义 | Pin11 | 由整车制造商定义 |
| Pin4 | 底盘接地 | Pin12 | 由整车制造商定义 |
| Pin5 | 信号接地 | Pin13 | 由整车制造商定义 |
| Pin6 | CAN总线高电平ISO 15765-4,SAE J2284 | Pin14 | CAN总线低电平ISO 15765-4,SAE J2284 |
| Pin7 | ISO 9141-2 / ISO 14230-4 K线 | Pin15 | ISO 9141-2 / ISO 14230-4 L线 |
| Pin8 | 由整车制造商定义 | Pin16 | 整车电源 |
), ArticleFig(id=1200066423017013968, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 模块 | 主要的固件库函数 | 模块 | 主要的固件库函数 |
| GPIO | GPIO_InitTypeDef; GPIO_Init(); GPIO_ReadInputDataBit(); GPIO_ResetBits(); GPIO_SetBits(); GPIO_PinRemapConfig(); | SDIO | SDIO_DeInit(); SDIO_Init(); SDIO_StructInit(); SDIO_ClockCmd(); SDIO_ITConfig(); SDIO_ReadData(); SDIO_WriteData(); |
| CAN | CAN_InitTypeDef; CAN_DeInit(); CAN_StructInit(); CAN_Init(); | 中断(Interrupt) | TIMx_IRQHandler(); USARTx_IRQHandler(); CANx_RX0_IRQHandler(); |
| 定时器(Timer) | TIM_TimeBaseInitTypeDef; TIM_DeInit(); TIM_TimeBaseInit(); TIM_ClearFlag(); TIM_ITConfig(); TIM_Cmd(); | 时钟(Clock) | RCC_APB1PeriphClockCmd(); RCC_APB2PeriphClockCmd(); HSE_SetSysClock(); RCC_DeInit(); RCC_HSEConfig(); Accident(); RCC_PCLK2Config(); RCC_PCLK1Config(); RCC_PLLConfig(); RCC_PLLCmd(); RCC_SYSCLKConfig(); |
| USART | USART_InitTypeDef; USART_DeInit(); USART_Init(); USART_ITConfig(); USART_Cmd(); USART_ClearFlag(); USART_SendData(); USART_GetFlagStatus(); |
), ArticleFig(id=1200066423147037399, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=CN, label=表2, caption=
主要使用的固件库函数集
, figureFileSmall=null, figureFileBig=null, tableContent=
| 模块 | 主要的固件库函数 | 模块 | 主要的固件库函数 |
| GPIO | GPIO_InitTypeDef; GPIO_Init(); GPIO_ReadInputDataBit(); GPIO_ResetBits(); GPIO_SetBits(); GPIO_PinRemapConfig(); | SDIO | SDIO_DeInit(); SDIO_Init(); SDIO_StructInit(); SDIO_ClockCmd(); SDIO_ITConfig(); SDIO_ReadData(); SDIO_WriteData(); |
| CAN | CAN_InitTypeDef; CAN_DeInit(); CAN_StructInit(); CAN_Init(); | 中断(Interrupt) | TIMx_IRQHandler(); USARTx_IRQHandler(); CANx_RX0_IRQHandler(); |
| 定时器(Timer) | TIM_TimeBaseInitTypeDef; TIM_DeInit(); TIM_TimeBaseInit(); TIM_ClearFlag(); TIM_ITConfig(); TIM_Cmd(); | 时钟(Clock) | RCC_APB1PeriphClockCmd(); RCC_APB2PeriphClockCmd(); HSE_SetSysClock(); RCC_DeInit(); RCC_HSEConfig(); Accident(); RCC_PCLK2Config(); RCC_PCLK1Config(); RCC_PLLConfig(); RCC_PLLCmd(); RCC_SYSCLKConfig(); |
| USART | USART_InitTypeDef; USART_DeInit(); USART_Init(); USART_ITConfig(); USART_Cmd(); USART_ClearFlag(); USART_SendData(); USART_GetFlagStatus(); |
), ArticleFig(id=1200066423264477917, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 指令ID | 执行的测试功能 |
| “00” | 诊断仪ID读取 |
| “01” | DTC删除 |
| “02” | DTC读取 |
| “03” | DTC读取+删除+读取 |
| “04” | 门电机自学习 |
| “05” | 运输模式开启 |
| “06” | 运输模式关闭 |
| “07” | 蓄电池SOC读取 |
| “08” | 高压SOC读取 |
| “09” | 静态电流检测 |
| “10” | 静态电流读取 |
| “11” | 运输模式切换 |
| “12” | 运输模式读取 |
| “13” | VIN码读取 |
| “14” | 离线时钟读取 |
), ArticleFig(id=1200066423348364003, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200066408479556414, language=CN, label=表3, caption=
诊断功能
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| 指令ID | 执行的测试功能 |
| “00” | 诊断仪ID读取 |
| “01” | DTC删除 |
| “02” | DTC读取 |
| “03” | DTC读取+删除+读取 |
| “04” | 门电机自学习 |
| “05” | 运输模式开启 |
| “06” | 运输模式关闭 |
| “07” | 蓄电池SOC读取 |
| “08” | 高压SOC读取 |
| “09” | 静态电流检测 |
| “10” | 静态电流读取 |
| “11” | 运输模式切换 |
| “12” | 运输模式读取 |
| “13” | VIN码读取 |
| “14” | 离线时钟读取 |
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