{"id":91651,"date":"2026-08-08T08:49:33","date_gmt":"2026-08-08T00:49:33","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/91651.html"},"modified":"2026-08-08T08:49:33","modified_gmt":"2026-08-08T00:49:33","slug":"%e3%80%8a%e5%b5%8c%e5%85%a5%e5%bc%8f%e9%80%9a%e8%ae%af%e5%8d%8f%e8%ae%ae%e6%a0%88%e5%ae%9e%e6%88%98%e3%80%8b2-uart","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/91651.html","title":{"rendered":"\u300a\u5d4c\u5165\u5f0f\u901a\u8baf\u534f\u8bae\u6808\u5b9e\u6218\u300b2 UART"},"content":{"rendered":"

\u7b2c 2 \u7bc7：UART\u2014\u2014\u4e32\u53e3\u7684\u5751\u6bd4\u4f60\u60f3\u8c61\u7684\u591a<\/h2>\n
\n

1. \u7269\u7406\u5c42：TTL\u3001RS232\u3001RS485 \u7684\u533a\u522b<\/h3>\n\n\u6807\u51c6\u7535\u5e73\u8ddd\u79bb\u8282\u70b9\u6570<\/tr>\n\n\n\n\n
TTL<\/td>\n0=0V, 1=3.3V<\/td>\n<1m<\/td>\n1\u5bf91<\/td>\n<\/tr>\n
RS232<\/td>\n-12V\/+12V<\/td>\n<15m<\/td>\n1\u5bf91<\/td>\n<\/tr>\n
RS485<\/td>\n\u5dee\u5206 \u00b12V<\/td>\n<1200m<\/td>\n\u6700\u591a 256 \u4e2a<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

2. GD32 UART + DMA + \u7a7a\u95f2\u4e2d\u65ad<\/h3>\n

void<\/span> uart_dma_init<\/span>(<\/span>void<\/span>)<\/span> {<\/span>
\n rcu_periph_clock_enable<\/span>(<\/span>RCU_USART0)<\/span>;<\/span>
\n rcu_periph_clock_enable<\/span>(<\/span>RCU_DMA0)<\/span>;<\/span><\/p>\n

\/\/ UART \u914d\u7f6e 115200-8-N-1<\/span>
\n usart_deinit<\/span>(<\/span>USART0)<\/span>;<\/span>
\n usart_baudrate_set<\/span>(<\/span>USART0,<\/span> 115200<\/span>)<\/span>;<\/span>
\n usart_word_length_set<\/span>(<\/span>USART0,<\/span> USART_WL_8BIT)<\/span>;<\/span>
\n usart_stop_bit_set<\/span>(<\/span>USART0,<\/span> USART_STB_1BIT)<\/span>;<\/span>
\n usart_parity_config<\/span>(<\/span>USART0,<\/span> USART_PM_NONE)<\/span>;<\/span><\/p>\n

\/\/ DMA \u63a5\u6536（\u5faa\u73af\u6a21\u5f0f）<\/span>
\n dma_parameter_struct dma_init_struct;<\/span>
\n dma_deinit<\/span>(<\/span>DMA0,<\/span> DMA_CH4)<\/span>;<\/span>
\n dma_init_struct.<\/span>direction =<\/span> DMA_PERIPHERAL_TO_MEMORY;<\/span>
\n dma_init_struct.<\/span>periph_addr =<\/span> (<\/span>uint32_t<\/span>)<\/span>&<\/span>USART_RDATA<\/span>(<\/span>USART0)<\/span>;<\/span>
\n dma_init_struct.<\/span>memory_addr =<\/span> (<\/span>uint32_t<\/span>)<\/span>rx_dma_buf;<\/span>
\n dma_init_struct.<\/span>number =<\/span> RX_BUF_SIZE;<\/span>
\n dma_init_struct.<\/span>periph_inc =<\/span> DMA_PERIPH_INCREASE_DISABLE;<\/span>
\n dma_init_struct.<\/span>memory_inc =<\/span> DMA_MEMORY_INCREASE_ENABLE;<\/span>
\n dma_init<\/span>(<\/span>DMA0,<\/span> DMA_CH4,<\/span> &<\/span>dma_init_struct)<\/span>;<\/span>
\n dma_circulation_enable<\/span>(<\/span>DMA0,<\/span> DMA_CH4)<\/span>;<\/span> \/\/ \u5faa\u73af\u63a5\u6536<\/span><\/p>\n

usart_dma_receive_config<\/span>(<\/span>USART0,<\/span> USART_RECEIVE_DMA_ENABLE)<\/span>;<\/span>
\n usart_interrupt_enable<\/span>(<\/span>USART0,<\/span> USART_INT_IDLE)<\/span>;<\/span> \/\/ \u7a7a\u95f2\u4e2d\u65ad<\/span>
\n usart_enable<\/span>(<\/span>USART0)<\/span>;<\/span>
\n}<\/span><\/p>\n

\n

3. \u73af\u5f62\u7f13\u51b2\u533a + \u7a7a\u95f2\u4e2d\u65ad\u65ad\u5e27<\/h3>\n

void<\/span> USART0_IRQHandler<\/span>(<\/span>void<\/span>)<\/span> {<\/span>
\n if<\/span> (<\/span>usart_interrupt_flag_get<\/span>(<\/span>USART0,<\/span> USART_INT_FLAG_IDLE)<\/span>)<\/span> {<\/span>
\n usart_data_receive<\/span>(<\/span>USART0)<\/span>;<\/span> \/\/ \u6e05\u9664 IDLE \u6807\u5fd7<\/span>
\n uint16_t<\/span> len =<\/span> RX_BUF_SIZE –<\/span> dma_transfer_number_get<\/span>(<\/span>DMA0,<\/span> DMA_CH4)<\/span>;<\/span>
\n ringbuf_write<\/span>(<\/span>&<\/span>rx_ring,<\/span> rx_dma_buf,<\/span> len)<\/span>;<\/span><\/p>\n

\/\/ \u901a\u77e5\u89e3\u6790\u4efb\u52a1<\/span>
\n xSemaphoreGiveFromISR<\/span>(<\/span>xRXSemaphore,<\/span> &<\/span>woken)<\/span>;<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

\u7a7a\u95f2\u4e2d\u65ad\u662f UART \u65ad\u5e27\u7684\u6700\u4f18\u96c5\u65b9\u6848\u2014\u2014\u4e0d\u9700\u8981\u5e27\u5934\u5e27\u5c3e，\u4e0d\u9700\u8981\u56fa\u5b9a\u957f\u5ea6，\u4e00\u5e27\u7ed3\u675f\u540e\u81ea\u52a8\u89e6\u53d1\u3002<\/p>\n

\n

\u4e0b\u4e00\u7bc7：UART \u534f\u8bae\u8bbe\u8ba1\u2014\u2014\u5b9a\u4e49\u4f60\u81ea\u5df1\u7684\u901a\u8baf\u534f\u8bae<\/p>\n","protected":false},"excerpt":{"rendered":"

\u7b2c 2 \u7bc7：UART\u2014\u2014\u4e32\u53e3\u7684\u5751\u6bd4\u4f60\u60f3\u8c61\u7684\u591a 1. \u7269\u7406\u5c42：TTL\u3001RS232\u3001RS485 \u7684\u533a\u522b
\n\u6807\u51c6\u7535\u5e73\u8ddd\u79bb\u8282\u70b9\u6570TTL00V, 13.3V<1m1\u5bf91RS232-12V\/12V<15m1\u5bf91RS485\u5dee\u5206 \u00b12V<1200m\u6700\u591a 256 \u4e2a2. GD32 UART DMA \u7a7a\u95f2\u4e2d\u65ad
\nvoid uart_dma_init(void) {rcu_periph_clock_enable(RCU_USART0);rcu_periph_cloc<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[270],"topic":[],"class_list":["post-91651","post","type-post","status-publish","format-standard","hentry","category-server","tag-270"],"yoast_head":"\n\u300a\u5d4c\u5165\u5f0f\u901a\u8baf\u534f\u8bae\u6808\u5b9e\u6218\u300b2 UART - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/91651.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u300a\u5d4c\u5165\u5f0f\u901a\u8baf\u534f\u8bae\u6808\u5b9e\u6218\u300b2 UART - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u7b2c 2 \u7bc7：UART\u2014\u2014\u4e32\u53e3\u7684\u5751\u6bd4\u4f60\u60f3\u8c61\u7684\u591a 1. \u7269\u7406\u5c42：TTL\u3001RS232\u3001RS485 \u7684\u533a\u522b \u6807\u51c6\u7535\u5e73\u8ddd\u79bb\u8282\u70b9\u6570TTL00V, 13.3V<1m1\u5bf91RS232-12V\/12V<15m1\u5bf91RS485\u5dee\u5206 \u00b12V<1200m\u6700\u591a 256 \u4e2a2. GD32 UART DMA \u7a7a\u95f2\u4e2d\u65ad void uart_dma_init(void) {rcu_periph_clock_enable(RCU_USART0);rcu_periph_cloc\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/91651.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-08-08T00:49:33+00:00\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/91651.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/91651.html\",\"name\":\"\u300a\u5d4c\u5165\u5f0f\u901a\u8baf\u534f\u8bae\u6808\u5b9e\u6218\u300b2 UART - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"isPartOf\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\"},\"datePublished\":\"2026-08-08T00:49:33+00:00\",\"dateModified\":\"2026-08-08T00:49:33+00:00\",\"author\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.wsisp.com\/helps\/91651.html#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.wsisp.com\/helps\/91651.html\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/91651.html#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.wsisp.com\/helps\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u300a\u5d4c\u5165\u5f0f\u901a\u8baf\u534f\u8bae\u6808\u5b9e\u6218\u300b2 UART\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#website\",\"url\":\"https:\/\/www.wsisp.com\/helps\/\",\"name\":\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\",\"description\":\"\u9999\u6e2f\u670d\u52a1\u5668_\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u8d44\u8baf_\u670d\u52a1\u5668\u5e2e\u52a9\u6587\u6863_\u670d\u52a1\u5668\u6559\u7a0b\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.wsisp.com\/helps\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/358e386c577a3ab51c4493330a20ad41\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"contentUrl\":\"https:\/\/gravatar.wp-china-yes.net\/avatar\/?s=96&d=mystery\",\"caption\":\"admin\"},\"sameAs\":[\"http:\/\/wp.wsisp.com\"],\"url\":\"https:\/\/www.wsisp.com\/helps\/author\/admin\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u300a\u5d4c\u5165\u5f0f\u901a\u8baf\u534f\u8bae\u6808\u5b9e\u6218\u300b2 UART - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.wsisp.com\/helps\/91651.html","og_locale":"zh_CN","og_type":"article","og_title":"\u300a\u5d4c\u5165\u5f0f\u901a\u8baf\u534f\u8bae\u6808\u5b9e\u6218\u300b2 UART - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3","og_description":"\u7b2c 2 \u7bc7：UART\u2014\u2014\u4e32\u53e3\u7684\u5751\u6bd4\u4f60\u60f3\u8c61\u7684\u591a 1. \u7269\u7406\u5c42：TTL\u3001RS232\u3001RS485 \u7684\u533a\u522b \u6807\u51c6\u7535\u5e73\u8ddd\u79bb\u8282\u70b9\u6570TTL00V, 13.3V<1m1\u5bf91RS232-12V\/12V<15m1\u5bf91RS485\u5dee\u5206 \u00b12V<1200m\u6700\u591a 256 \u4e2a2. 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