使用DMA方式收发数据的实践 STM32_USART_DMA_RX

代码说明：

  程序为STM32 串口UART 使用DMA方式收发数据的实践(how to read data on UART by using DMA when number of bytes to receive is not known in advance.)

文件列表：

STM32_USART_DMA_RX, 0 , 2019-07-12
STM32_USART_DMA_RX\.git, 0 , 2019-07-12
STM32_USART_DMA_RX\.gitattributes, 391 , 2019-07-12
STM32_USART_DMA_RX\.gitignore, 6425 , 2019-07-12
STM32_USART_DMA_RX\.gitmodules, 128 , 2019-07-12
STM32_USART_DMA_RX\.git\config, 410 , 2019-07-12
STM32_USART_DMA_RX\.git\description, 73 , 2019-07-12
STM32_USART_DMA_RX\.git\FETCH_HEAD, 107 , 2019-07-15
STM32_USART_DMA_RX\.git\HEAD, 23 , 2019-07-12
STM32_USART_DMA_RX\.git\hooks, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\hooks\applypatch-msg.sample, 478 , 2019-07-12
STM32_USART_DMA_RX\.git\hooks\commit-msg.sample, 896 , 2019-07-12
STM32_USART_DMA_RX\.git\hooks\fsmonitor-watchman.sample, 3327 , 2019-07-12
STM32_USART_DMA_RX\.git\hooks\post-update.sample, 189 , 2019-07-12
STM32_USART_DMA_RX\.git\hooks\pre-applypatch.sample, 424 , 2019-07-12
STM32_USART_DMA_RX\.git\hooks\pre-commit.sample, 1638 , 2019-07-12
STM32_USART_DMA_RX\.git\hooks\pre-push.sample, 1348 , 2019-07-12
STM32_USART_DMA_RX\.git\hooks\pre-rebase.sample, 4898 , 2019-07-12
STM32_USART_DMA_RX\.git\hooks\pre-receive.sample, 544 , 2019-07-12
STM32_USART_DMA_RX\.git\hooks\prepare-commit-msg.sample, 1492 , 2019-07-12
STM32_USART_DMA_RX\.git\hooks\update.sample, 3610 , 2019-07-12
STM32_USART_DMA_RX\.git\index, 35601 , 2019-07-12
STM32_USART_DMA_RX\.git\info, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\info\exclude, 240 , 2019-07-12
STM32_USART_DMA_RX\.git\logs, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\logs\HEAD, 186 , 2019-07-12
STM32_USART_DMA_RX\.git\logs\refs, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\logs\refs\heads, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\logs\refs\heads\master, 186 , 2019-07-12
STM32_USART_DMA_RX\.git\logs\refs\remotes, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\logs\refs\remotes\origin, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\logs\refs\remotes\origin\HEAD, 186 , 2019-07-12
STM32_USART_DMA_RX\.git\modules, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\config, 343 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\description, 73 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\FETCH_HEAD, 110 , 2019-07-15
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\HEAD, 41 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\hooks, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\hooks\applypatch-msg.sample, 478 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\hooks\commit-msg.sample, 896 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\hooks\fsmonitor-watchman.sample, 3327 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\hooks\post-update.sample, 189 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\hooks\pre-applypatch.sample, 424 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\hooks\pre-commit.sample, 1638 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\hooks\pre-push.sample, 1348 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\hooks\pre-rebase.sample, 4898 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\hooks\pre-receive.sample, 544 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\hooks\prepare-commit-msg.sample, 1492 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\hooks\update.sample, 3610 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\index, 679 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\info, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\info\exclude, 240 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\logs, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\logs\HEAD, 377 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\logs\refs, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\logs\refs\heads, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\logs\refs\heads\master, 176 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\logs\refs\remotes, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\logs\refs\remotes\origin, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\logs\refs\remotes\origin\HEAD, 176 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\objects, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\objects\info, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\objects\pack, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\objects\pack\pack-aed6c74b146a5f51c75e9d58a44ac28f989c216d.idx, 6644 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\objects\pack\pack-aed6c74b146a5f51c75e9d58a44ac28f989c216d.pack, 52760 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\packed-refs, 170 , 2019-07-12
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STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\refs\heads\master, 41 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\refs\remotes, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\refs\remotes\origin, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\refs\remotes\origin\HEAD, 32 , 2019-07-12
STM32_USART_DMA_RX\.git\modules\middlewares\ringbuff\refs\tags, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\objects, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\objects\info, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\objects\pack, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\objects\pack\pack-fa618fa6a1c9bd7d255d6eb78154226fce47dc1d.idx, 29772 , 2019-07-12
STM32_USART_DMA_RX\.git\objects\pack\pack-fa618fa6a1c9bd7d255d6eb78154226fce47dc1d.pack, 1568029 , 2019-07-12
STM32_USART_DMA_RX\.git\packed-refs, 114 , 2019-07-12
STM32_USART_DMA_RX\.git\refs, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\refs\heads, 0 , 2019-07-12
STM32_USART_DMA_RX\.git\refs\heads\master, 41 , 2019-07-12
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STM32_USART_DMA_RX\.git\refs\remotes\origin\HEAD, 32 , 2019-07-12
STM32_USART_DMA_RX\.git\refs\tags, 0 , 2019-07-12
STM32_USART_DMA_RX\docs, 0 , 2019-07-12
STM32_USART_DMA_RX\docs\dma_circular_mode_template.xml, 1328 , 2019-07-12
STM32_USART_DMA_RX\docs\dma_event.xml, 2463 , 2019-07-12
STM32_USART_DMA_RX\docs\dma_events.svg, 37574 , 2019-07-12
STM32_USART_DMA_RX\drivers, 0 , 2019-07-12
STM32_USART_DMA_RX\drivers\CMSIS, 0 , 2019-07-12
STM32_USART_DMA_RX\drivers\CMSIS\Device, 0 , 2019-07-12
STM32_USART_DMA_RX\drivers\CMSIS\Device\ST, 0 , 2019-07-12
STM32_USART_DMA_RX\drivers\CMSIS\Device\ST\STM32F1xx, 0 , 2019-07-12
STM32_USART_DMA_RX\drivers\CMSIS\Device\ST\STM32F1xx\Include, 0 , 2019-07-12
STM32_USART_DMA_RX\drivers\CMSIS\Device\ST\STM32F1xx\Include\stm32f103xb.h, 884820 , 2019-07-12
STM32_USART_DMA_RX\drivers\CMSIS\Device\ST\STM32F1xx\Include\stm32f1xx.h, 8788 , 2019-07-12