{"id":266,"date":"2021-05-08T16:06:00","date_gmt":"2021-05-08T08:06:00","guid":{"rendered":"http:\/\/150.158.163.220\/?p=266"},"modified":"2022-12-19T20:17:03","modified_gmt":"2022-12-19T12:17:03","slug":"%e9%80%9a%e8%bf%87%e4%b8%b2%e5%8f%a3%e7%a9%ba%e9%97%b2%e4%b8%ad%e6%96%ad%e7%bb%93%e5%90%88dma%e7%9a%84%e6%96%b9%e5%bc%8f%e5%ae%9e%e7%8e%b0%e4%b8%8d%e5%ae%9a%e9%95%bf%e6%95%b0%e6%8d%ae%e7%9a%84","status":"publish","type":"post","link":"https:\/\/zhewana.cn\/?p=266","title":{"rendered":"\u901a\u8fc7\u4e32\u53e3\u7a7a\u95f2\u4e2d\u65ad\u7ed3\u5408DMA\u7684\u65b9\u5f0f\u5b9e\u73b0\u4e0d\u5b9a\u957f\u6570\u636e\u7684\u63a5\u53d7"},"content":{"rendered":"<p>\u9996\u5148\u6253\u5f00\u4e32\u53e3\u5e76\u6253\u5f00\u4e32\u53e3\u7684\u6536\u53d1DMA\u3002<\/p>\n<p>\u63a5\u4e0b\u6765\u5168\u90e8\u7f16\u8bd1\u4e00\u904d\u6587\u4ef6\u3002<\/p>\n<p>\u627e\u5230main.h\u6587\u4ef6\uff0c\u5728\u5bf9\u5e94\u4f4d\u7f6e\u63d2\u5165\u56de\u8c03\u51fd\u6570\u51fd\u6570\u58f0\u660e\uff1a<\/p>\n<pre><code class=\"language-c\">\/* USER CODE BEGIN EFP *\/\nvoid My_UART_IDLECallback(UART_HandleTypeDef *huart);\n\/* USER CODE END EFP *\/<\/code><\/pre>\n<p>\u8fdb\u5165stm32f4xx_it.c\u6587\u4ef6\uff0c\u5728\u4e32\u53e3\u4e2d\u65ad\u51fd\u6570\u91cc\u9762\u63d2\u5165\u7a7a\u95f2\u4e2d\u65ad\u670d\u52a1\u51fd\u6570\uff1a<\/p>\n<pre><code class=\"language-c\"> \/* USER CODE BEGIN USART1_IRQn 1 *\/\n\/\/\u5224\u65ad\u662f\u5426\u662f\u4e32\u53e31\nif(USART1 == huart1.Instance)                                   \n{\n    \/\/\u5224\u65ad\u662f\u5426\u662f\u7a7a\u95f2\u4e2d\u65ad\n    if(RESET != __HAL_UART_GET_FLAG(&amp;huart1, UART_FLAG_IDLE))   \n    {   \n        \/\/\u6e05\u9664\u7a7a\u95f2\u4e2d\u65ad\u6807\u5fd7\uff08\u5426\u5219\u4f1a\u4e00\u76f4\u4e0d\u65ad\u8fdb\u5165\u4e2d\u65ad\uff09\n        __HAL_UART_CLEAR_IDLEFLAG(&amp;huart1);                     \n        \/\/\u8c03\u7528\u4e2d\u65ad\u56de\u8c03\u51fd\u6570\n        My_UART_IDLECallback(&amp;huart1);                         \n     }\n}\n  \/* USER CODE END USART1_IRQn 1 *\/<\/code><\/pre>\n<p>\u6700\u540e\u5728main.c\u6587\u4ef6\u91cc\u9762\u52a0\u5165\u6211\u4eec\u81ea\u5df1\u7684\u51fd\u6570\uff1a<\/p>\n<pre><code class=\"language-c\">\/* USER CODE BEGIN PD *\/\n#define BUFFER_SIZE 20\n\/* USER CODE END PD *\/\n\nstruct myuart{\n    uint8_t* buffer_addr;\/\/\u7f13\u51b2\u533a\u9996\u5730\u5740\n    uint32_t date_size;\/\/\u4f20\u8f93\u6570\u636e\u957f\u5ea6\n}myuart_1;\n\n\/\/\u4e32\u53e3\u7ed3\u6784\u4f53\u521d\u59cb\u5316\nvoid My_UART_IDLEIT_DMA_Init(uint8_t* Address)\n{\n    myuart_1.buffer_addr=Address;\n}\n\n\/\/\u4e32\u53e3\u63a5\u6536\u51fd\u6570\nvoid My_UART_IDLEIT_DMA_Receive(UART_HandleTypeDef *huart, uint8_t *pData)\n{\n    __HAL_UART_ENABLE_IT(huart, UART_IT_IDLE);\/\/\u5f00\u542f\u7a7a\u95f2\u4e2d\u65ad\n    HAL_UART_Receive_DMA(huart, pData, BUFFER_SIZE);\/\/\u5f00\u542fDMA\u63a5\u6536\u51fd\u6570\n}\n\n\/\/\u4e32\u53e3\u53d1\u9001\u51fd\u6570\nvoid My_UART_IDLEIT_DMA_Transmit(UART_HandleTypeDef *huart, uint8_t *pData)\n{\n    __HAL_UART_ENABLE_IT(huart, UART_IT_IDLE);\/\/\u5f00\u542f\u7a7a\u95f2\u4e2d\u65ad\n    HAL_UART_Transmit_DMA(huart, pData, BUFFER_SIZE);\/\/\u5f00\u542fDMA\u53d1\u9001\u51fd\u6570\n}\n\n\/\/\u7a7a\u95f2\u4e2d\u65ad\u56de\u8c03\u51fd\u6570\nvoid My_UART_IDLECallback(UART_HandleTypeDef *huart)\n{\n    HAL_UART_DMAStop(huart);\/\/\u505c\u6b62DMA\u4f20\u8f93\n\n    myuart_1.date_size = BUFFER_SIZE -  __HAL_DMA_GET_COUNTER(huart-&gt;hdmarx);\/\/\u8ba1\u7b97\u6570\u636e\u957f\u5ea6\n\n    \/*\u6570\u636e\u5904\u7406\u51fd\u6570\u5f00\u59cb*\/\n    \/*bla  bla ....*\/\n    \/*\u6570\u636e\u5904\u7406\u51fd\u6570\u7ed3\u675f*\/\n    memset(myuart_1.buffer_addr, 0, myuart_1.date_size);\/\/\u91cd\u7f6e\u7f13\u51b2\u533a\n\n    HAL_UART_Receive_DMA(huart, myuart_1.buffer_addr, BUFFER_SIZE);\/\/\u5f00\u542fDMA\u63a5\u53d7\u51fd\u6570\n    __HAL_UART_ENABLE_IT(huart, UART_IT_IDLE);\/\/\u5f00\u542f\u7a7a\u95f2\u4e2d\u65ad\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u9996\u5148\u6253\u5f00\u4e32\u53e3\u5e76\u6253\u5f00\u4e32\u53e3\u7684\u6536\u53d1DMA\u3002 \u63a5\u4e0b\u6765\u5168\u90e8\u7f16\u8bd1\u4e00\u904d\u6587\u4ef6\u3002 \u627e\u5230main.h\u6587\u4ef6\uff0c\u5728\u5bf9\u5e94\u4f4d\u7f6e\u63d2\u5165\u56de\u8c03\u51fd\u6570\u51fd [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[18],"class_list":["post-266","post","type-post","status-publish","format-standard","hentry","category-embedded","tag-stm32"],"_links":{"self":[{"href":"https:\/\/zhewana.cn\/index.php?rest_route=\/wp\/v2\/posts\/266","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zhewana.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zhewana.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zhewana.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zhewana.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=266"}],"version-history":[{"count":1,"href":"https:\/\/zhewana.cn\/index.php?rest_route=\/wp\/v2\/posts\/266\/revisions"}],"predecessor-version":[{"id":267,"href":"https:\/\/zhewana.cn\/index.php?rest_route=\/wp\/v2\/posts\/266\/revisions\/267"}],"wp:attachment":[{"href":"https:\/\/zhewana.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=266"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zhewana.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=266"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zhewana.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}