DMA_PWM405two.rar ,使用软件STM32cubeIDE在STM32F4上,tim2双缓冲点亮灯带ws2812灯带

上传者: 22146161 | 上传时间: 2025-03-31 11:12:33 | 文件大小: 4.66MB | 文件类型: RAR
在本项目中,我们主要探讨的是如何利用STM32CubeIDE在STM32F4微控制器上通过DMA和PWM技术来驱动WS2812灯带。STM32F4系列是基于ARM Cortex-M4内核的高性能微控制器,常用于嵌入式硬件设计,而STM32CubeIDE是ST Microelectronics提供的集成开发环境,集成了代码生成、调试和配置等功能,使得开发过程更为便捷。 我们需要了解STM32F4的定时器(TIM)功能。在这个案例中,使用了TIM2,这是一个通用定时器,可以配置为PWM模式。PWM(脉宽调制)是一种常见的控制LED亮度或驱动其他设备的方法,通过改变脉冲宽度来调整输出电压的平均值。双缓冲机制则是在TIM2内部,允许我们在不中断PWM输出的情况下更新定时器的参数,提高了系统性能。 接下来,DMA(直接内存访问)在其中起到了关键作用。DMA允许数据在存储器和外设之间直接传输,无需CPU介入,从而减轻了CPU负担并提高了效率。在驱动WS2812灯带时,DMA可以用来连续发送数据流到TIM2,以控制LED的亮灭顺序和颜色。 WS2812是一款常见的RGB LED灯带,每个LED包含红、绿、蓝三种颜色,可以通过单线接口进行串行通信。这种串行通信协议要求严格的时间精度,因此需要STM32的定时器精确地生成特定的时序。WS2812的通信协议是基于定时器中断和DMA的结合,确保每个颜色数据的正确传输。 在STM32CubeIDE中,我们需要配置TIM2的参数,包括预分频器、自动重载值等,以便设置合适的PWM周期。同时,要开启TIM2的DMA请求,将数据从内存传输到定时器的捕获/比较寄存器。此外,还需要编写DMA配置代码,设置源地址、目标地址、传输长度以及传输完成的中断处理。 在驱动WS2812灯带时,我们需要预先计算好每个LED的颜色值,并将其按顺序排列在内存中。这些颜色值会被DMA读取并按照WS2812的协议序列化后输出。由于WS2812要求数据在极短的时间内连续发送,所以需要精确的时序控制,这正是STM32F4的定时器和DMA功能的优势所在。 总结来说,这个项目涉及了STM32F4的TIM2定时器配置、PWM输出、DMA数据传输和WS2812灯带的串行通信协议。通过理解这些知识点,我们可以实现用STM32CubeIDE在STM32F4微控制器上高效、精确地控制RGB LED灯带,创造出各种动态灯光效果。

文件下载

资源详情

[{"title":"( 132 个子文件 4.66MB ) DMA_PWM405two.rar ,使用软件STM32cubeIDE在STM32F4上,tim2双缓冲点亮灯带ws2812灯带","children":[{"title":"DMA_PWM405two.bin <span style='color:#111;'> 12.43KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_tim.c <span style='color:#111;'> 245.34KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_rcc_ex.c <span style='color:#111;'> 155.67KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_tim_ex.c <span style='color:#111;'> 82.89KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_flash_ex.c <span style='color:#111;'> 50.23KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_rcc.c <span style='color:#111;'> 42.62KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_dma.c <span style='color:#111;'> 39.99KB </span>","children":null,"spread":false},{"title":"system_stm32f4xx.c <span style='color:#111;'> 27.12KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_flash.c <span style='color:#111;'> 24.39KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_pwr_ex.c <span style='color:#111;'> 23.01KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_pwr.c <span style='color:#111;'> 20.74KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal.c <span style='color:#111;'> 19.39KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_gpio.c <span style='color:#111;'> 19.02KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_cortex.c <span style='color:#111;'> 18.90KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_exti.c <span style='color:#111;'> 15.28KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_dma_ex.c <span style='color:#111;'> 10.51KB </span>","children":null,"spread":false},{"title":"main.c <span style='color:#111;'> 7.31KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_flash_ramfunc.c <span style='color:#111;'> 6.23KB </span>","children":null,"spread":false},{"title":"stm32f4xx_it.c <span style='color:#111;'> 5.82KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_msp.c <span style='color:#111;'> 4.97KB </span>","children":null,"spread":false},{"title":"ws2812.c <span style='color:#111;'> 3.43KB </span>","children":null,"spread":false},{"title":"sysmem.c <span style='color:#111;'> 2.75KB </span>","children":null,"spread":false},{"title":"syscalls.c <span style='color:#111;'> 2.54KB </span>","children":null,"spread":false},{"title":".cproject <span style='color:#111;'> 25.06KB </span>","children":null,"spread":false},{"title":"stm32f4xx_it.d <span style='color:#111;'> 3.20KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_flash_ramfunc.d <span style='color:#111;'> 3.18KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_flash_ex.d <span style='color:#111;'> 3.17KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_tim_ex.d <span style='color:#111;'> 3.17KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_pwr_ex.d <span style='color:#111;'> 3.17KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_rcc_ex.d <span style='color:#111;'> 3.17KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_dma_ex.d <span style='color:#111;'> 3.17KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_cortex.d <span style='color:#111;'> 3.17KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_flash.d <span style='color:#111;'> 3.17KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_gpio.d <span style='color:#111;'> 3.17KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_exti.d <span style='color:#111;'> 3.17KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_pwr.d <span style='color:#111;'> 3.16KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_rcc.d <span style='color:#111;'> 3.16KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_tim.d <span style='color:#111;'> 3.16KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_dma.d <span style='color:#111;'> 3.16KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal.d <span style='color:#111;'> 3.16KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_msp.d <span style='color:#111;'> 3.15KB </span>","children":null,"spread":false},{"title":"ws2812.d <span style='color:#111;'> 3.13KB </span>","children":null,"spread":false},{"title":"main.d <span style='color:#111;'> 3.13KB </span>","children":null,"spread":false},{"title":"system_stm32f4xx.d <span style='color:#111;'> 3.11KB </span>","children":null,"spread":false},{"title":"startup_stm32f405vgtx.d <span style='color:#111;'> 83B </span>","children":null,"spread":false},{"title":"syscalls.d <span style='color:#111;'> 45B </span>","children":null,"spread":false},{"title":"sysmem.d <span style='color:#111;'> 41B </span>","children":null,"spread":false},{"title":"DMA_PWM405two.elf <span style='color:#111;'> 1.11MB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_rcc_ex.h <span style='color:#111;'> 430.17KB </span>","children":null,"spread":false},{"title":"stm32_hal_legacy.h <span style='color:#111;'> 210.36KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_tim.h <span style='color:#111;'> 120.65KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_gpio_ex.h <span style='color:#111;'> 80.97KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_rcc.h <span style='color:#111;'> 73.52KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_flash_ex.h <span style='color:#111;'> 63.91KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_dma.h <span style='color:#111;'> 37.94KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_conf.h <span style='color:#111;'> 19.68KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_cortex.h <span style='color:#111;'> 17.14KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_tim_ex.h <span style='color:#111;'> 16.59KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_pwr_ex.h <span style='color:#111;'> 16.02KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_exti.h <span style='color:#111;'> 15.01KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_flash.h <span style='color:#111;'> 14.69KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_pwr.h <span style='color:#111;'> 14.37KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_gpio.h <span style='color:#111;'> 13.86KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal.h <span style='color:#111;'> 12.85KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_def.h <span style='color:#111;'> 7.72KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_dma_ex.h <span style='color:#111;'> 2.86KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_flash_ramfunc.h <span style='color:#111;'> 2.42KB </span>","children":null,"spread":false},{"title":"main.h <span style='color:#111;'> 2.18KB </span>","children":null,"spread":false},{"title":"stm32f4xx_it.h <span style='color:#111;'> 2.09KB </span>","children":null,"spread":false},{"title":"DMA_PWM405two.ioc <span style='color:#111;'> 4.91KB </span>","children":null,"spread":false},{"title":"DMA_PWM405two Debug.launch <span style='color:#111;'> 8.45KB </span>","children":null,"spread":false},{"title":"STM32F405VGTX_FLASH.ld <span style='color:#111;'> 5.26KB </span>","children":null,"spread":false},{"title":"STM32F405VGTX_RAM.ld <span style='color:#111;'> 5.25KB </span>","children":null,"spread":false},{"title":"DMA_PWM405two.list <span style='color:#111;'> 316.14KB </span>","children":null,"spread":false},{"title":"objects.list <span style='color:#111;'> 1.10KB </span>","children":null,"spread":false},{"title":"makefile <span style='color:#111;'> 3.21KB </span>","children":null,"spread":false},{"title":"DMA_PWM405two.map <span style='color:#111;'> 285.52KB </span>","children":null,"spread":false},{"title":"subdir.mk <span style='color:#111;'> 3.60KB </span>","children":null,"spread":false},{"title":"subdir.mk <span style='color:#111;'> 1.46KB </span>","children":null,"spread":false},{"title":"subdir.mk <span style='color:#111;'> 831B </span>","children":null,"spread":false},{"title":"sources.mk <span style='color:#111;'> 609B </span>","children":null,"spread":false},{"title":"objects.mk <span style='color:#111;'> 292B </span>","children":null,"spread":false},{"title":".mxproject <span style='color:#111;'> 6.64KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_tim.o <span style='color:#111;'> 1.06MB </span>","children":null,"spread":false},{"title":"main.o <span style='color:#111;'> 1.01MB </span>","children":null,"spread":false},{"title":"ws2812.o <span style='color:#111;'> 1.01MB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_tim_ex.o <span style='color:#111;'> 1.00MB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_cortex.o <span style='color:#111;'> 1011.68KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal.o <span style='color:#111;'> 1007.90KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_dma.o <span style='color:#111;'> 1006.62KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_rcc.o <span style='color:#111;'> 1005.52KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_dma_ex.o <span style='color:#111;'> 1004.05KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_flash_ex.o <span style='color:#111;'> 1002.32KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_flash.o <span style='color:#111;'> 1002.20KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_pwr.o <span style='color:#111;'> 1000.95KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_gpio.o <span style='color:#111;'> 999.95KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_msp.o <span style='color:#111;'> 999.34KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_rcc_ex.o <span style='color:#111;'> 998.42KB </span>","children":null,"spread":false},{"title":"stm32f4xx_hal_exti.o <span style='color:#111;'> 998.36KB </span>","children":null,"spread":false},{"title":"stm32f4xx_it.o <span style='color:#111;'> 996.68KB </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