第二篇、使用DMA优化FreeModbus从机数据接收(无OS,裸机移植)

上传者: xiaoqian_3251 | 上传时间: 2025-06-21 09:22:06 | 文件大小: 9.36MB | 文件类型: ZIP
在当今的嵌入式系统开发中,FreeModbus作为一个广泛使用的Modbus协议实现,为开发者提供了一种简便的方法来实现串行通信。特别是对于STM32这样的微控制器,使用STM32CubeMX工具可以方便地生成初始化代码,大大简化了硬件抽象层(HAL)的配置。然而,当涉及到高频率的数据交换时,传统的中断驱动方法可能会导致CPU负担过重,影响性能。这就是DMA(直接内存访问)大放异彩的时刻。 DMA允许硬件子系统直接访问内存,无需CPU的干预即可执行数据传输。这种机制极大地提高了数据处理的效率,尤其是在处理大量或高速数据流时。在裸机环境下,即没有操作系统(OS)的情况下,使用DMA来优化FreeModbus从机的数据接收,可以显著提升系统性能和响应速度。 实现基于DMA的FreeModbus从机数据接收,首先需要对STM32CubeMX进行适当的配置,确保相应的DMA通道被正确初始化。这涉及到对DMA控制寄存器的设置,包括选择正确的内存地址、外设地址以及传输方向和大小等参数。一旦DMA配置完成,它就可以被激活来接收串行端口的数据,并将数据直接存储到指定的内存缓冲区中。 在裸机环境中,开发者需要手动编写更多的代码来处理中断和DMA传输完成事件。因此,对于FreeModbus从机来说,需要在接收到数据传输完成中断时,编写逻辑来处理这些数据。这通常涉及检查数据长度、校验数据完整性以及根据Modbus协议格式化和解析接收到的数据。 除了配置和事件处理代码,还需要考虑错误处理机制。在DMA传输过程中可能出现的错误包括传输超时、数据损坏或传输中断。这些都需要在代码中进行适当的处理,以确保系统的稳定性和可靠性。 此外,由于在裸机环境中没有操作系统提供的多任务处理能力,因此需要特别注意不要让任何长时间执行的任务阻塞了系统的主循环。所有的任务,包括DMA数据处理,都应设计成短小精悍,以确保系统的及时响应。 使用DMA优化FreeModbus从机数据接收,在没有操作系统的裸机环境中,通过STM32CubeMX工具的辅助,可以实现高效的数据处理,提升系统的性能和响应速度。然而,这需要对硬件资源进行精细的配置,并且编写合理的中断处理和错误处理逻辑,以确保系统的稳定性和可靠性。

文件下载

资源详情

[{"title":"( 229 个子文件 9.36MB ) 第二篇、使用DMA优化FreeModbus从机数据接收(无OS,裸机移植)","children":[{"title":"FreeModbus_Cube.uvguix.10932 <span style='color:#111;'> 179.51KB </span>","children":null,"spread":false},{"title":"FreeModbus_Cube.axf <span style='color:#111;'> 561.54KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_tim.c <span style='color:#111;'> 238.24KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_uart.c <span style='color:#111;'> 132.35KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_tim_ex.c <span style='color:#111;'> 77.11KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_rcc.c <span style='color:#111;'> 47.61KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_flash_ex.c <span style='color:#111;'> 34.92KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_rcc_ex.c <span style='color:#111;'> 29.17KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_flash.c <span style='color:#111;'> 28.33KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_dma.c <span style='color:#111;'> 26.78KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_gpio.c <span style='color:#111;'> 20.98KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_pwr.c <span style='color:#111;'> 20.26KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal.c <span style='color:#111;'> 19.78KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_cortex.c <span style='color:#111;'> 18.81KB </span>","children":null,"spread":false},{"title":"mbascii.c <span style='color:#111;'> 15.31KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_exti.c <span style='color:#111;'> 14.70KB </span>","children":null,"spread":false},{"title":"system_stm32f1xx.c <span style='color:#111;'> 14.23KB </span>","children":null,"spread":false},{"title":"mb.c <span style='color:#111;'> 12.57KB </span>","children":null,"spread":false},{"title":"mbfuncholding.c <span style='color:#111;'> 11.87KB </span>","children":null,"spread":false},{"title":"mbfunccoils.c <span style='color:#111;'> 9.61KB </span>","children":null,"spread":false},{"title":"mbrtu.c <span style='color:#111;'> 9.28KB </span>","children":null,"spread":false},{"title":"portserial.c <span style='color:#111;'> 8.44KB </span>","children":null,"spread":false},{"title":"demo.c <span style='color:#111;'> 7.65KB </span>","children":null,"spread":false},{"title":"main.c <span style='color:#111;'> 7.25KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_msp.c <span style='color:#111;'> 5.58KB </span>","children":null,"spread":false},{"title":"mbtcp.c <span style='color:#111;'> 5.54KB </span>","children":null,"spread":false},{"title":"mbcrc.c <span style='color:#111;'> 5.36KB </span>","children":null,"spread":false},{"title":"stm32f1xx_it.c <span style='color:#111;'> 5.28KB </span>","children":null,"spread":false},{"title":"mbfuncdisc.c <span style='color:#111;'> 5.20KB </span>","children":null,"spread":false},{"title":"mbutils.c <span style='color:#111;'> 4.94KB </span>","children":null,"spread":false},{"title":"mbfuncinput.c <span style='color:#111;'> 4.68KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_gpio_ex.c <span style='color:#111;'> 4.05KB </span>","children":null,"spread":false},{"title":"porttimer.c <span style='color:#111;'> 3.66KB </span>","children":null,"spread":false},{"title":"mbfuncother.c <span style='color:#111;'> 3.41KB </span>","children":null,"spread":false},{"title":"mbrtu.c <span style='color:#111;'> 1.92KB </span>","children":null,"spread":false},{"title":"portevent.c <span style='color:#111;'> 1.66KB </span>","children":null,"spread":false},{"title":"mbfuncdiag.c <span style='color:#111;'> 1.58KB </span>","children":null,"spread":false},{"title":"porttimer.crf <span style='color:#111;'> 558.11KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_uart.crf <span style='color:#111;'> 538.68KB </span>","children":null,"spread":false},{"title":"mb.crf <span style='color:#111;'> 534.55KB </span>","children":null,"spread":false},{"title":"mbfuncholding.crf <span style='color:#111;'> 533.47KB </span>","children":null,"spread":false},{"title":"mbfunccoils.crf <span style='color:#111;'> 532.40KB </span>","children":null,"spread":false},{"title":"mbrtu.crf <span style='color:#111;'> 532.26KB </span>","children":null,"spread":false},{"title":"mbfuncdisc.crf <span style='color:#111;'> 530.86KB </span>","children":null,"spread":false},{"title":"mbfuncinput.crf <span style='color:#111;'> 530.85KB </span>","children":null,"spread":false},{"title":"mbfuncother.crf <span style='color:#111;'> 530.54KB </span>","children":null,"spread":false},{"title":"mbutils.crf <span style='color:#111;'> 529.90KB </span>","children":null,"spread":false},{"title":"portserial.crf <span style='color:#111;'> 527.93KB </span>","children":null,"spread":false},{"title":"demo.crf <span style='color:#111;'> 525.19KB </span>","children":null,"spread":false},{"title":"main.crf <span style='color:#111;'> 524.61KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_rcc.crf <span style='color:#111;'> 523.41KB </span>","children":null,"spread":false},{"title":"portevent.crf <span style='color:#111;'> 523.16KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_dma.crf <span style='color:#111;'> 519.16KB </span>","children":null,"spread":false},{"title":"mbcrc.crf <span style='color:#111;'> 517.73KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_flash_ex.crf <span style='color:#111;'> 517.35KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_flash.crf <span style='color:#111;'> 516.13KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_gpio.crf <span style='color:#111;'> 515.21KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_exti.crf <span style='color:#111;'> 514.44KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_pwr.crf <span style='color:#111;'> 514.30KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_rcc_ex.crf <span style='color:#111;'> 514.10KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_msp.crf <span style='color:#111;'> 513.16KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal.crf <span style='color:#111;'> 512.85KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_cortex.crf <span style='color:#111;'> 512.33KB </span>","children":null,"spread":false},{"title":"stm32f1xx_it.crf <span style='color:#111;'> 511.89KB </span>","children":null,"spread":false},{"title":"system_stm32f1xx.crf <span style='color:#111;'> 511.70KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_gpio_ex.crf <span style='color:#111;'> 511.55KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_tim_ex.crf <span style='color:#111;'> 511.30KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_tim.crf <span style='color:#111;'> 511.30KB </span>","children":null,"spread":false},{"title":"mbfuncdiag.crf <span style='color:#111;'> 18B </span>","children":null,"spread":false},{"title":"mbfuncholding.d <span style='color:#111;'> 3.07KB </span>","children":null,"spread":false},{"title":"mbfuncinput.d <span style='color:#111;'> 2.99KB </span>","children":null,"spread":false},{"title":"mbfuncother.d <span style='color:#111;'> 2.99KB </span>","children":null,"spread":false},{"title":"mbfunccoils.d <span style='color:#111;'> 2.99KB </span>","children":null,"spread":false},{"title":"mbfuncdisc.d <span style='color:#111;'> 2.95KB </span>","children":null,"spread":false},{"title":"mbrtu.d <span style='color:#111;'> 2.81KB </span>","children":null,"spread":false},{"title":"porttimer.d <span style='color:#111;'> 2.79KB </span>","children":null,"spread":false},{"title":"mb.d <span style='color:#111;'> 2.75KB </span>","children":null,"spread":false},{"title":"portserial.d <span style='color:#111;'> 2.73KB </span>","children":null,"spread":false},{"title":"mbutils.d <span style='color:#111;'> 2.71KB </span>","children":null,"spread":false},{"title":"portevent.d <span style='color:#111;'> 2.62KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_flash_ex.d <span style='color:#111;'> 2.54KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_gpio_ex.d <span style='color:#111;'> 2.51KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_cortex.d <span style='color:#111;'> 2.48KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_rcc_ex.d <span style='color:#111;'> 2.48KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_tim_ex.d <span style='color:#111;'> 2.48KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_flash.d <span style='color:#111;'> 2.46KB </span>","children":null,"spread":false},{"title":"demo.d <span style='color:#111;'> 2.45KB </span>","children":null,"spread":false},{"title":"main.d <span style='color:#111;'> 2.44KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_msp.d <span style='color:#111;'> 2.43KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_exti.d <span style='color:#111;'> 2.43KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_gpio.d <span style='color:#111;'> 2.43KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_uart.d <span style='color:#111;'> 2.43KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_tim.d <span style='color:#111;'> 2.40KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_pwr.d <span style='color:#111;'> 2.40KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_rcc.d <span style='color:#111;'> 2.40KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal_dma.d <span style='color:#111;'> 2.40KB </span>","children":null,"spread":false},{"title":"system_stm32f1xx.d <span style='color:#111;'> 2.36KB </span>","children":null,"spread":false},{"title":"stm32f1xx_it.d <span style='color:#111;'> 2.35KB </span>","children":null,"spread":false},{"title":"mbcrc.d <span style='color:#111;'> 2.30KB </span>","children":null,"spread":false},{"title":"stm32f1xx_hal.d <span style='color:#111;'> 2.29KB </span>","children":null,"spread":false},{"title":"......","children":null,"spread":false},{"title":"<span style='color:steelblue;'>文件过多,未全部展示</span>","children":null,"spread":false}],"spread":true}]

评论信息

免责申明

【只为小站】的资源来自网友分享,仅供学习研究,请务必在下载后24小时内给予删除,不得用于其他任何用途,否则后果自负。基于互联网的特殊性,【只为小站】 无法对用户传输的作品、信息、内容的权属或合法性、合规性、真实性、科学性、完整权、有效性等进行实质审查;无论 【只为小站】 经营者是否已进行审查,用户均应自行承担因其传输的作品、信息、内容而可能或已经产生的侵权或权属纠纷等法律责任。
本站所有资源不代表本站的观点或立场,基于网友分享,根据中国法律《信息网络传播权保护条例》第二十二条之规定,若资源存在侵权或相关问题请联系本站客服人员,zhiweidada#qq.com,请把#换成@,本站将给予最大的支持与配合,做到及时反馈和处理。关于更多版权及免责申明参见 版权及免责申明