{"id":802,"date":"2024-07-28T15:55:11","date_gmt":"2024-07-28T07:55:11","guid":{"rendered":"https:\/\/aoofoo.com\/?p=802"},"modified":"2024-07-31T10:58:36","modified_gmt":"2024-07-31T02:58:36","slug":"2-23-dma%e6%95%b0%e6%8d%ae%e8%bd%ac%e8%bf%90dmaamd%e4%bb%a3%e7%a0%81%e9%83%a8%e5%88%86","status":"publish","type":"post","link":"https:\/\/aoofoo.com\/index.php\/2024\/07\/28\/2-23-dma%e6%95%b0%e6%8d%ae%e8%bd%ac%e8%bf%90dmaamd%e4%bb%a3%e7%a0%81%e9%83%a8%e5%88%86\/","title":{"rendered":"2.23 DMA\u6570\u636e\u8f6c\u8fd0&#038;DMA+AD\u591a\u901a\u9053\u4ee3\u7801"},"content":{"rendered":"<h2>\u5bfc\u8bed<\/h2>\n<p>\u5728\u6b63\u5f0f\u5f00\u59cbDMA\u4ee3\u7801\u4e4b\u524d\uff0c\u6211\u4eec\u5148\u82b1\u4e00\u6bb5\u65f6\u95f4\u505a\u4e2a\u5c0f\u5b9e\u9a8c\uff0c\u6765\u9a8c\u8bc1\u4e00\u4e0b\u5b58\u50a8\u5668\u6620\u50cf\u7684\u5185\u5bb9\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-805\" src=\"https:\/\/aoofoo.com\/wp-content\/uploads\/2024\/07\/1-222.png\" alt=\"\" width=\"765\" height=\"199\" \/><\/p>\n<p>\u770b\u4e00\u4e0b\u6211\u4eec\u5b9a\u4e49\u7684\u6570\u636e\uff0c\u662f\u4e0d\u662f\u771f\u7684\u5b58\u50a8\u5728\u4e86\u76f8\u5e94\u7684\u5730\u5740\u533a\u95f4\u91cc\u3002<\/p>\n<pre class=\"corepress-code-pre\"><code>uint8_t AOOFOO = 0X66; \r\nint main(void){\r\n\tOLED_Init();\r\n\tOLED_ShowString(1,6,\"AOOFOO\");\/\/\u5b57\u7b26\u4e32\r\n\twhile(1)\r\n\t{\r\n\t\tOLED_ShowHexNum(2,1,AOOFOO,2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\t\tOLED_ShowHexNum(3,1,(uint32_t)&amp;AOOFOO,8);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\t}\r\n}<\/code><\/pre>\n<p>\u4e0a\u9762\u4ee3\u7801\u63cf\u8ff0\u4e86\u4e00\u4e2a\u53d8\u91cf\u5b58\u50a8\u5728SRAM\u4e2d\u7684\uff0c\u6211\u4eec\u770b\u4e00\u4e0b\u5b9e\u9645\u7684\u6548\u679c\u56fe\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-806\" src=\"https:\/\/aoofoo.com\/wp-content\/uploads\/2024\/07\/f6e6b052ca323551983b6b739c6f521.jpg\" alt=\"\" width=\"200\" height=\"156\" \/>\uff0c\u53ef\u4ee5\u770b\u5230\u662f2000\u5f00\u5934\u7684SRAM\u5730\u5740\u533a\u3002<\/p>\n<p>\u7a0d\u5fae\u4fee\u6539\u4e00\u4e0b\u4ee3\u7801\uff0c\u5c06AOOFOO\u53d8\u91cf\u53d8\u66f4\u4e3a\u5e38\u91cf\uff0c\u90a3\u4e48AOOFOO\u7684\u5730\u5740\u5c31\u4f1a\u76f8\u5e94\u7684\u53d8\u4e3aFlash\u7684\u5730\u5740\u533a\u3002<\/p>\n<pre class=\"corepress-code-pre\"><code>const uint8_t AOOFOO = 0X66; \/\/const\u662fC\u8bed\u8a00\u5173\u952e\u5b57\uff0c\u8868\u793a\u5e38\u91cf\u7684\u610f\u601d\uff0c\u53ea\u80fd\u8bfb\u4e0d\u80fd\u5199\u3002\r\nint main(void){\r\n\tOLED_Init();\r\n\tOLED_ShowString(1,6,\"AOOFOO\");\/\/\u5b57\u7b26\u4e32\r\n\twhile(1)\r\n\t{\r\n\t\tOLED_ShowHexNum(2,1,AOOFOO,2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\t\tOLED_ShowHexNum(3,1,(uint32_t)&amp;AOOFOO,8);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\t}\r\n}<\/code><\/pre>\n<p>\u6211\u4eec\u770b\u4e00\u4e0b\u5b9e\u9645\u7684\u6548\u679c\u56fe\uff1a<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-807\" src=\"https:\/\/aoofoo.com\/wp-content\/uploads\/2024\/07\/9d03fe367243bd502f7363591ae5b15-e1722154353127-300x190.jpg\" alt=\"\" width=\"186\" height=\"118\" srcset=\"https:\/\/aoofoo.com\/wp-content\/uploads\/2024\/07\/9d03fe367243bd502f7363591ae5b15-e1722154353127-300x190.jpg 300w, https:\/\/aoofoo.com\/wp-content\/uploads\/2024\/07\/9d03fe367243bd502f7363591ae5b15-e1722154353127-768x486.jpg 768w, https:\/\/aoofoo.com\/wp-content\/uploads\/2024\/07\/9d03fe367243bd502f7363591ae5b15-e1722154353127-1024x647.jpg 1024w, https:\/\/aoofoo.com\/wp-content\/uploads\/2024\/07\/9d03fe367243bd502f7363591ae5b15-e1722154353127.jpg 1210w\" sizes=\"auto, (max-width: 186px) 100vw, 186px\" \/>\uff0c\u53ef\u4ee5\u770b\u5230\u5730\u5740\u662f0800\u5f00\u5934\uff0c\u5373Flash\u7684\u5730\u5740\u533a\u3002<\/p>\n<p>const\u7684\u89c4\u8303\u4f7f\u7528\u53ef\u4ee5\u51cf\u5c11SRAM\u7684\u7a7a\u95f4\uff0c\u6bd4\u5982\u4f60\u5b9a\u4e49\u4e86\u5b57\u5e93\uff0c\u4f7f\u7528\u7684const\u5b9a\u4e49\u7684\uff0c\u8fd9\u6837\u8fd9\u4e9b\u4ee3\u7801\u5c31\u5c5e\u4e8e\u662fFlash\u5730\u5740\u91cc\u7684\uff0c\u4e0d\u4f1a\u5360\u7528SRAM\u7684\u7a7a\u95f4\u3002<\/p>\n<h2>\u521d\u59cb\u5316DMA<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-808\" src=\"https:\/\/aoofoo.com\/wp-content\/uploads\/2024\/07\/1-223.png\" alt=\"\" width=\"652\" height=\"308\" \/><\/p>\n<p>\u7b2c\u4e00\u6b65\uff0cRCC\u5f00\u542fDMA\u65f6\u949f\u3002<\/p>\n<p>\u7b2c\u4e8c\u6b65\uff0c\u8c03\u7528DMA_Init()\u5e93\u51fd\u6570\uff0c\u521d\u59cb\u5316\u91cc\u9762\u7684\u5404\u4e2a\u53c2\u6570\uff08\u5916\u8bbe\u548c\u5b58\u50a8\u5668\u7ad9\u70b9\u7684\u8d77\u59cb\u5730\u5740\u3001\u6570\u636e\u5bbd\u5ea6\u3001\u5730\u5740\u662f\u5426\u81ea\u589e\u548c\u65b9\u5411\u3001\u4f20\u8f93\u8ba1\u6570\u5668\u3001\u662f\u5426\u9700\u8981\u81ea\u52a8\u91cd\u88c5\u3001\u9009\u62e9\u89e6\u53d1\u6e90\uff09\u3002<\/p>\n<p>\u7b2c\u4e09\u6b65\uff0c\u5f00\u5173\u63a7\u5236\uff0cDMA_Cmd\uff0c\u7ed9\u6307\u5b9a\u7684\u901a\u9053\u4f7f\u80fd\u3002<\/p>\n<p>\u53e6\u5916\uff0c\u5982\u679c\u4f7f\u7528\u7684\u786c\u4ef6\u89e6\u53d1\u6e90\uff0c\u8981\u8bb0\u5f97\u5728\u5bf9\u5e94\u7684\u5916\u8bbe\u8c03\u7528\u4e00\u4e0bXXX_DMACmd()\u5e93\u51fd\u6570\uff0c\u5f00\u542f\u4e00\u4e0b\u89e6\u53d1\u4fe1\u53f7\u7684\u8f93\u51fa\u3002<\/p>\n<p>\u5982\u679c\u4f60\u9700\u8981DMA\u7684\u4e2d\u65ad\uff0c\u90a3\u5c31\u8c03\u7528DMA_ITConfig\uff0c\u5f00\u542f\u4e2d\u65ad\u8f93\u51fa\uff0c\u518d\u5728NVIC\u91cc\u914d\u7f6e\u76f8\u5e94\u7684\u4e2d\u65ad\u901a\u9053\u5199\u4e2d\u65ad\u51fd\u6570\u5c31\u884c\u4e86\u3002<\/p>\n<p>\u6700\u540e\uff0c\u5728\u8fd0\u884c\u8fc7\u7a0b\u4e2d\uff0c\u5982\u679c\u8f6c\u8fd0\u5b8c\u6210\u4e86\uff0c\u4f20\u8f93\u8ba1\u6570\u5668\u6e050\u4e86\uff0c\u8fd9\u65f6\u518d\u60f3\u7ed9\u4f20\u8f93\u8ba1\u6570\u5668\u8d4b\u503c\u7684\u8bdd\uff0c\u9700\u8981\u5148DMA\u5931\u80fd\u3001\u5199\u4f20\u8f93\u8ba1\u6570\u5668\u3001DMA\u4f7f\u80fd\u8fd9\u6837\u7684\u6d41\u7a0b\u5c31\u884c\u4e86\u3002<\/p>\n<h3>DMA\u5e93\u51fd\u6570<\/h3>\n<div class=\"sc-collapse\"><div class=\"sc-collapse__header\"><svg class=\"sc-collapse__arrow\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><polyline points=\"6 9 12 15 18 9\"\/><\/svg>\u7ecf\u5178\u5e93\u51fd\u6570\uff0c\u4e0d\u5fc5\u8fc7\u591a\u4ecb\u7ecd<\/div><div class=\"sc-collapse__body\"><div class=\"sc-collapse__content\"><\/p>\n<p>void DMA_DeInit(DMA_Channel_TypeDef* DMAy_Channelx); \/\/\u7f3a\u7701\u914d\u7f6e<br \/>\nvoid DMA_Init(DMA_Channel_TypeDef* DMAy_Channelx, DMA_InitTypeDef* DMA_InitStruct);\/\/\u521d\u59cb\u5316<br \/>\nvoid DMA_StructInit(DMA_InitTypeDef* DMA_InitStruct);\/\/\u7ed3\u6784\u4f53\u521d\u59cb\u5316<br \/>\nvoid DMA_Cmd(DMA_Channel_TypeDef* DMAy_Channelx, FunctionalState NewState);\/\/\u4f7f\u80fd<\/p>\n<p><\/div><\/div><\/div>\n<div class=\"sc-collapse\"><div class=\"sc-collapse__header\"><svg class=\"sc-collapse__arrow\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><polyline points=\"6 9 12 15 18 9\"\/><\/svg>\u4f20\u8f93\u8ba1\u6570\u5668\u7684\u5199\u5165\u548c\u8bfb\u53d6<\/div><div class=\"sc-collapse__body\"><div class=\"sc-collapse__content\"><\/p>\n<p>void DMA_SetCurrDataCounter(DMA_Channel_TypeDef* DMAy_Channelx, uint16_t DataNumber);\/\/DMA\u8bbe\u7f6e\u5f53\u524d\u6570\u636e\u5bc4\u5b58\u5668<\/p>\n<p>\u8fd9\u4e2a\u51fd\u6570\u5c31\u662f\u5199\u5165\u4f20\u8f93\u8ba1\u6570\u5668\u6570\u636e\u7684\u3002<\/p>\n<p>uint16_t DMA_GetCurrDataCounter(DMA_Channel_TypeDef* DMAy_Channelx);\/\/DMA\u83b7\u53d6\u5f53\u524d\u6570\u636e\u5bc4\u5b58\u5668<\/p>\n<p>\u8fd9\u4e2a\u51fd\u6570\u5c31\u662f\u83b7\u53d6\u4f20\u8f93\u8ba1\u6570\u5668\u6570\u636e\u7684\u3002<\/p>\n<p><\/div><\/div><\/div>\n<div class=\"sc-collapse\"><div class=\"sc-collapse__header\"><svg class=\"sc-collapse__arrow\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><polyline points=\"6 9 12 15 18 9\"\/><\/svg>DMA\u4e2d\u65ad\u76f8\u5173<\/div><div class=\"sc-collapse__body\"><div class=\"sc-collapse__content\"><\/p>\n<p>FlagStatus DMA_GetFlagStatus(uint32_t DMAy_FLAG);\/\/\u83b7\u53d6\u6807\u5fd7\u4f4d\u72b6\u6001<br \/>\nvoid DMA_ClearFlag(uint32_t DMAy_FLAG);\/\/\u6e05\u9664\u6807\u5fd7\u4f4d<br \/>\nITStatus DMA_GetITStatus(uint32_t DMAy_IT);\/\/\u83b7\u53d6\u4e2d\u65ad\u72b6\u6001<br \/>\nvoid DMA_ClearITPendingBit(uint32_t DMAy_IT);\/\/\u6e05\u9664\u4e2d\u65ad\u72b6\u6001<\/p>\n<p><\/div><\/div><\/div>\n<h3 class=\"post-title\">DMA\u6570\u636e\u8f6c\u8fd0<\/h3>\n<pre class=\"corepress-code-pre\"><code>uint16_t MyDMA_Size;\r\n\r\nvoid MyDMA_Init(uint32_t AddrA,uint32_t AddrB,uint16_t Size)\r\n{\r\n       MyDMA_Size = Size;\r\n\t\/\/\u5f00\u542fDMA1\u7684\u65f6\u949f\r\n\tRCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);\r\n\t\/\/\u914d\u7f6eDMA\u521d\u59cb\u5316\u51fd\u6570\r\n\tDMA_InitTypeDef DMA_InitStructure;\t\r\n\t\/*\u524d\u516d\u4e2a\u6210\u5458\u662f\u5916\u8bbe\u7ad9\u70b9\u7684\u8d77\u59cb\u5730\u5740\u3001\u6570\u636e\u5bbd\u5ea6\u3001\u5730\u5740\u662f\u5426\u81ea\u589e\r\n\t\u548c\u5b58\u50a8\u5668\u7ad9\u70b9\u7684\u8d77\u59cb\u5730\u5740\u3001\u6570\u636e\u5bbd\u5ea6\u3001\u5730\u5740\u662f\u5426\u81ea\u589e*\/\r\n\tDMA_InitStructure.DMA_PeripheralBaseAddr=AddrA;\/\/\u8d77\u59cb\u5730\u5740\r\n\tDMA_InitStructure.DMA_PeripheralDataSize=DMA_PeripheralDataSize_Byte;\/\/\u5b57\u8282\u5927\u5c0f\r\n\tDMA_InitStructure.DMA_PeripheralInc=DMA_PeripheralInc_Enable;\/\/\u81ea\u589e\r\n\tDMA_InitStructure.DMA_MemoryBaseAddr=AddrB;\/\/\u8d77\u59cb\u5730\u5740\r\n\tDMA_InitStructure.DMA_MemoryDataSize=DMA_MemoryDataSize_Byte;\/\/\u5b57\u8282\u5927\u5c0f\r\n\tDMA_InitStructure.DMA_MemoryInc=DMA_MemoryInc_Enable;\/\/\u81ea\u589e\r\n\t\/\/\u4f20\u8f93\u65b9\u5411DST\u662f\u5b58\u50a8\u5668\u5230\u5916\u8bbe\uff0cSRC\u662f\u5916\u8bbe\u5230\u5b58\u50a8\u5668\u3002\r\n\tDMA_InitStructure.DMA_DIR=DMA_DIR_PeripheralSRC;\r\n\t\/\/\u7f13\u51b2\u533a\u5927\u5c0f\uff08\u5176\u5b9e\u5c31\u662f\u4f20\u8f93\u8ba1\u6570\u5668\uff09\r\n\tDMA_InitStructure.DMA_BufferSize=Size;\r\n\t\/\/\u4f20\u8f93\u6a21\u5f0f\uff08\u5176\u5b9e\u5c31\u662f\u662f\u5426\u4f7f\u7528\u81ea\u52a8\u91cd\u88c5\uff09\r\n\tDMA_InitStructure.DMA_Mode=DMA_Mode_Normal; \r\n\t\/\/\u9009\u62e9\u786c\u4ef6\u89e6\u53d1\u8fd8\u662f\u8f6f\u4ef6\u89e6\u53d1\t\r\n\tDMA_InitStructure.DMA_M2M=DMA_M2M_Enable;\r\n\t\/\/\u4f18\u5148\u7ea7\uff0c\u6309\u7167\u53c2\u6570\u8981\u6c42\u7ed9\u4e2a\u4f18\u5148\u7ea7\u5c31\u884c\u4e86\r\n\tDMA_InitStructure.DMA_Priority=DMA_Priority_Medium;\r\n\tDMA_Init(DMA1_Channel1,&amp;DMA_InitStructure);\r\n\t\r\n\t\/\/DMA\u4f7f\u80fd\r\n\tDMA_Cmd(DMA1_Channel1,DISABLE);\r\n}\r\n\r\n\/\/\u8c03\u7528\u4e00\u6b21\u8fd9\u4e2a\u51fd\u6570\uff0c\u5c31\u518d\u4e00\u6b21\u542f\u52a8DMA\u8f6c\u8fd0\r\nvoid MyDMA_Transfer(void)\r\n{\r\n\tDMA_Cmd(DMA1_Channel1,DISABLE);\r\n\tDMA_SetCurrDataCounter(DMA1_Channel1, MyDMA_Size;);\r\n\tDMA_Cmd(DMA1_Channel1,ENABLE);\r\n}\r\n<\/code><\/pre>\n<p>&nbsp;<\/p>\n<pre class=\"corepress-code-pre\"><code>\/\/\u903b\u8f91\u51fd\u6570\u4ee3\u7801\r\nuint8_t DataA[] = {0x01,0x02,0x03,0x04};\r\nuint8_t DataB[] = {0x00,0x00,0x00,0x00};\r\n\r\nint main(void){\r\n\tOLED_Init();  \r\n\tMyDMA_Init((uint32_t)DataA,(uint32_t)DataB,4);\r\n\t\r\n\tOLED_ShowString(1,1,\"DataA\");\/\/\u5b57\u7b26\u4e32\r\n\tOLED_ShowString(3,1,\"DataB\");\/\/\u5b57\u7b26\u4e32\r\n\tOLED_ShowHexNum(1,8,(uint32_t)DataA,8);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\tOLED_ShowHexNum(3,8,(uint32_t)DataB,8);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\t\r\n\tOLED_ShowHexNum(2,1,DataA[0],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\tOLED_ShowHexNum(2,4,DataA[1],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\tOLED_ShowHexNum(2,7,DataA[2],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\tOLED_ShowHexNum(2,10,DataA[3],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\tOLED_ShowHexNum(4,1,DataB[0],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\tOLED_ShowHexNum(4,4,DataB[1],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\tOLED_ShowHexNum(4,7,DataB[2],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\tOLED_ShowHexNum(4,10,DataB[3],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\t\r\n\twhile(1)\r\n\t{\r\n\t\tDataA[0]++;\r\n\t\tDataA[1]++;\r\n\t\tDataA[2]++;\r\n\t\tDataA[3]++;\r\n\t\tOLED_ShowHexNum(2,1,DataA[0],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\t\tOLED_ShowHexNum(2,4,DataA[1],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\t\tOLED_ShowHexNum(2,7,DataA[2],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\t\tOLED_ShowHexNum(2,10,DataA[3],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\t\tOLED_ShowHexNum(4,1,DataB[0],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\t\tOLED_ShowHexNum(4,4,DataB[1],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\t\tOLED_ShowHexNum(4,7,DataB[2],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\t\tOLED_ShowHexNum(4,10,DataB[3],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\t\tDelay_ms(1000);\r\n\t\t\r\n\t\tMyDMA_Transfer();\r\n\t\tOLED_ShowHexNum(2,1,DataA[0],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\t\tOLED_ShowHexNum(2,4,DataA[1],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\t\tOLED_ShowHexNum(2,7,DataA[2],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\t\tOLED_ShowHexNum(2,10,DataA[3],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\t\tOLED_ShowHexNum(4,1,DataB[0],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\t\tOLED_ShowHexNum(4,4,DataB[1],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\t\tOLED_ShowHexNum(4,7,DataB[2],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\t\tOLED_ShowHexNum(4,10,DataB[3],2);\/\/\u5341\u516d\u8fdb\u5236\u6570\r\n\t\tDelay_ms(1000);\r\n\t\t\r\n\t\t\r\n\t}\r\n}\r\n<\/code><\/pre>\n<p>\u901a\u8fc7\u4e0a\u9762\u7684\u4ee3\u7801\uff0c\u53ef\u4ee5\u76f4\u89c2\u7684\u770b\u5230\u6570\u636e\u88abDMA\u8fdb\u884c\u4e86\u8f6c\u8fd0\u3002DataA\u6570\u7ec4\u4e2d\u7684\u6570\u5b57\u81ea\u589e\u540e\uff0c\u8f6c\u8fd0\u81f3DataB\u4e2d\uff0c\u5982\u6b64\u53cd\u590d\u3002<\/p>\n<h2>DMA+AD\u591a\u901a\u9053<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-814\" src=\"https:\/\/aoofoo.com\/wp-content\/uploads\/2024\/07\/1-224.png\" alt=\"\" width=\"644\" height=\"297\" \/><\/p>\n<p>ADC\u5355\u6b21\u626b\u63cf+DMA\u5355\u6b21\u8f6c\u8fd0\uff1a<\/p>\n<pre class=\"corepress-code-pre\"><code>uint16_t AD_Value[4];\r\nvoid AD_Init()\r\n{\r\n\t\/\/\u5f00\u542fADC1\u3001GPIOA\u3001DMA1\u7684\u65f6\u949f\r\n\tRCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);\r\n\tRCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1,ENABLE);\r\n\tRCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);\r\n\t\r\n\t\/\/\u914d\u7f6eADCCLK\uff0c6\u5206\u9891\uff0cADCCLK = 72MHz\/6= 12MHz\r\n\tRCC_ADCCLKConfig(RCC_PCLK2_Div6);\r\n\t\r\n\t\/\/\u914d\u7f6eGPIO\uff0c\u521d\u59cb\u5316PA0\u5f15\u811a\r\n\tGPIO_InitTypeDef GPIO_InitStructure;\r\n\tGPIO_InitStructure.GPIO_Mode=GPIO_Mode_AIN;\/\/\u6a21\u62df\u8f93\u5165\r\n\t\/*\u5728AIN\u6a21\u5f0f\u4e0b\uff0cGPIO\u53e3\u662f\u65e0\u6548\u7684\uff0c\u65ad\u5f00GPIO\u9632\u6b62GPIO\u53e3\u7684\u8f93\u5165\u8f93\u51fa\u5bf9\u6a21\u62df\u7535\u538b\u9020\u6210\u5e72\u6270\u3002\r\n\t\t\u6240\u4ee5AIN\u6a21\u5f0f\u662fADC\u7684\u4e13\u5c5e\u6a21\u5f0f\u3002*\/\r\n\tGPIO_InitStructure.GPIO_Pin=GPIO_Pin_0 |GPIO_Pin_1 |GPIO_Pin_2 |GPIO_Pin_3;\r\n\tGPIO_Init(GPIOA,&amp;GPIO_InitStructure); \r\n\t\r\n\t\/\/\u9009\u62e9\u89c4\u5219\u7ec4\u7684\u8f93\u5165\u901a\u9053\u3002\u91c7\u6837\u65f6\u95f4\u662f55.5\u4e2aADC\u5468\u671f\u3002\r\n\t\/\/\u8fd9\u4e2a\u51fd\u6570\u7684\u610f\u601d\u662f\uff0c\u5728\u89c4\u5219\u7ec4\u5e8f\u52171\u7684\u4f4d\u7f6e\u653e\u5165\u901a\u9053x\uff0cx\u7ecf\u8fc7\u5916\u90e8\u4f20\u8f93\u5f97\u77e5\u3002\r\n\tADC_RegularChannelConfig(ADC1,ADC_Channel_0,1,ADC_SampleTime_55Cycles5);\r\n\tADC_RegularChannelConfig(ADC1,ADC_Channel_1,2,ADC_SampleTime_55Cycles5);\r\n\tADC_RegularChannelConfig(ADC1,ADC_Channel_2,3,ADC_SampleTime_55Cycles5);\r\n\tADC_RegularChannelConfig(ADC1,ADC_Channel_3,4,ADC_SampleTime_55Cycles5);\r\n\t\r\n\t\/\/\u914d\u7f6eADC\r\n\tADC_InitTypeDef ADC_InitStruct;\t\r\n\t\t\/\/ADC\u5de5\u4f5c\u6a21\u5f0f\uff0c\u914d\u7f6e\u72ec\u7acb\u6a21\u5f0f\u6216\u8005\u53ccADC\u6a21\u5f0f\u3002\r\n\tADC_InitStruct.ADC_Mode=ADC_Mode_Independent; \r\n\t\t\/\/\u6570\u636e\u5bf9\u9f50\uff0c\u9009\u62e9\u53f3\u5bf9\u9f50\u3002\r\n\tADC_InitStruct.ADC_DataAlign=ADC_DataAlign_Right;\t\r\n\t\t\/\/\u5916\u90e8\u89e6\u53d1\u8f6c\u6362\u9009\u62e9\uff0c\u5c31\u662f\u89e6\u53d1\u63a7\u5236\u7684\u89e6\u53d1\u6e90\u3002\r\n\t\t\/\/\u9009\u62e9\u4e0d\u662f\u4f7f\u7528\u5916\u90e8\u89e6\u53d1\uff0c\u5c31\u662f\u8f6f\u4ef6\u89e6\u53d1\u7684\u610f\u601d\u3002\r\n\tADC_InitStruct.ADC_ExternalTrigConv=ADC_ExternalTrigConv_None;\r\n\t\t\/\/\u8fde\u7eed\u8f6c\u6362\u6a21\u5f0f\uff0c\u9009\u62e9\u8fde\u7eed\u8f6c\u6362\u8fd8\u662f\u5355\u6b21\u8f6c\u6362\u3002\r\n\tADC_InitStruct.ADC_ContinuousConvMode=DISABLE;\r\n\t\t\/\/\u626b\u63cf\u8f6c\u6362\u6a21\u5f0f\uff0c\u9009\u62e9\u626b\u63cf\u6a21\u5f0f\u8fd8\u662f\u975e\u626b\u63cf\u6a21\u5f0f\u3002\r\n\tADC_InitStruct.ADC_ScanConvMode=ENABLE;\r\n\t    \/\/\u901a\u9053\u6570\u76ee\uff0c\u6307\u5b9a\u5728\u626b\u63cf\u6a21\u5f0f\u4e0b\uff0c\u603b\u5171\u4f1a\u7528\u51e0\u4e2a\u901a\u9053\u3002\r\n\t\t\/*\u5176\u5b9e\u8fd9\u4e2a\u53c2\u6570\u53ea\u5728\u626b\u63cf\u6a21\u5f0f\u4e0b\u624d\u9700\u8981\u7528\uff0c\r\n\t\t\u5982\u679c\u662f\u975e\u626b\u63cf\u6a21\u5f0f\uff0c\u90a3\u6574\u4e2a\u5217\u8868\u53ea\u6709\u7b2c\u4e00\u4e2a\u5e8f\u5217\u6709\u7528*\/\r\n\tADC_InitStruct.ADC_NbrOfChannel=4;\r\n\t\r\n\tADC_Init(ADC1,&amp;ADC_InitStruct);\r\n\t\r\n\r\n\t\/\/\u914d\u7f6eDMA\u521d\u59cb\u5316\u51fd\u6570\r\n\tDMA_InitTypeDef DMA_InitStructure;\t\r\n\t\/*\u524d\u516d\u4e2a\u6210\u5458\u662f\u5916\u8bbe\u7ad9\u70b9\u7684\u8d77\u59cb\u5730\u5740\u3001\u6570\u636e\u5bbd\u5ea6\u3001\u5730\u5740\u662f\u5426\u81ea\u589e\r\n\t\u548c\u5b58\u50a8\u5668\u7ad9\u70b9\u7684\u8d77\u59cb\u5730\u5740\u3001\u6570\u636e\u5bbd\u5ea6\u3001\u5730\u5740\u662f\u5426\u81ea\u589e*\/\r\n\tDMA_InitStructure.DMA_PeripheralBaseAddr=(uint32_t)&amp;ADC1-&gt;DR;\/\/ADC\u5bc4\u5b58\u5668\u5730\u5740\r\n\tDMA_InitStructure.DMA_PeripheralDataSize=DMA_PeripheralDataSize_HalfWord;\/\/\u534a\u5b57\u5927\u5c0f\r\n\tDMA_InitStructure.DMA_PeripheralInc=DMA_PeripheralInc_Disable;\/\/\u4e0d\u81ea\u589e\r\n\tDMA_InitStructure.DMA_MemoryBaseAddr=(uint32_t)AD_Value;\/\/\u8d77\u59cb\u5730\u5740\r\n\tDMA_InitStructure.DMA_MemoryDataSize=DMA_MemoryDataSize_HalfWord;\/\/\u534a\u5b57\u5927\u5c0f\r\n\tDMA_InitStructure.DMA_MemoryInc=DMA_MemoryInc_Enable;\/\/\u81ea\u589e\r\n\t\/\/\u4f20\u8f93\u65b9\u5411DST\u662f\u5b58\u50a8\u5668\u5230\u5916\u8bbe\uff0cSRC\u662f\u5916\u8bbe\u5230\u5b58\u50a8\u5668\u3002\r\n\tDMA_InitStructure.DMA_DIR=DMA_DIR_PeripheralSRC;\r\n\t\/\/\u7f13\u51b2\u533a\u5927\u5c0f\uff08\u5176\u5b9e\u5c31\u662f\u4f20\u8f93\u8ba1\u6570\u5668\uff09\r\n\tDMA_InitStructure.DMA_BufferSize=4;\r\n\t\/\/\u4f20\u8f93\u6a21\u5f0f\uff08\u5176\u5b9e\u5c31\u662f\u662f\u5426\u4f7f\u7528\u81ea\u52a8\u91cd\u88c5\uff09\r\n\tDMA_InitStructure.DMA_Mode=DMA_Mode_Normal; \r\n\t\/\/\u9009\u62e9\u786c\u4ef6\u89e6\u53d1\u8fd8\u662f\u8f6f\u4ef6\u89e6\u53d1\uff0c\u4e0d\u4f7f\u7528\u8f6f\u4ef6\u89e6\u53d1\t\r\n\tDMA_InitStructure.DMA_M2M=DMA_M2M_Disable;\r\n\t\/\/\u4f18\u5148\u7ea7\uff0c\u6309\u7167\u53c2\u6570\u8981\u6c42\u7ed9\u4e2a\u4f18\u5148\u7ea7\u5c31\u884c\u4e86\r\n\tDMA_InitStructure.DMA_Priority=DMA_Priority_Medium;\r\n\tDMA_Init(DMA1_Channel1,&amp;DMA_InitStructure);\r\n\t\r\n\t\/\/DMA\u4f7f\u80fd\r\n\tDMA_Cmd(DMA1_Channel1,ENABLE);\r\n\t\r\n\t\/\/\u5f00\u542fADC\u5230DMA\u7684\u8f93\u51fa\r\n\tADC_DMACmd(ADC1,ENABLE);\r\n\t\r\n\t\/\/\u5f00\u542fADC\u7535\u6e90\r\n\tADC_Cmd(ADC1,ENABLE);\r\n\t\r\n\t\/\/ADC\u6821\u51c6\r\n\tADC_ResetCalibration(ADC1);\/\/\u590d\u4f4d\u6821\u51c6\r\n\t\/*\u83b7\u53d6\u590d\u4f4d\u6821\u51c6\u72b6\u6001\uff0c\u6240\u4ee5\u5982\u679c\u8981\u7b49\u5f85\u590d\u4f4d\u5b8c\u6210\u7684\u8bdd\uff0c\r\n\t\u8fd8\u9700\u8981\u52a0\u4e2awhile\u5faa\u73af\uff0c\u5982\u679c\u6ca1\u6709\u6821\u51c6\u5b8c\u6210\uff0c\u5c31\u5728\u8fd9\u4e2awhile\u7a7a\u5faa\u73af\u91cc\u4e00\u76f4\u7b49\u5f85\u3002*\/\r\n\twhile(ADC_GetResetCalibrationStatus(ADC1) == SET);\r\n\tADC_StartCalibration(ADC1);\/\/\u5f00\u542f\u6821\u51c6\r\n\twhile(ADC_GetCalibrationStatus(ADC1) == SET);\/\/\u7b49\u5f85\u6821\u51c6\u662f\u5426\u5b8c\u6210\u4e86\u3002\r\n\r\n\t\r\n}\r\nvoid AD_GetValue(void)\r\n{\r\n\t\/\/\u56e0\u4e3aDMA\u4e5f\u662f\u6b63\u5e38\u7684\u5355\u6b21\u6a21\u5f0f\uff0c\u6240\u4ee5\u5728\u89e6\u53d1ADC\u4e4b\u524d\uff0c\u9700\u8981\u518d\u91cd\u65b0\u5199\u5165\u4e00\u4e0b\u4f20\u8f93\u8ba1\u6570\u5668\r\n\tDMA_Cmd(DMA1_Channel1,DISABLE);\r\n\tDMA_SetCurrDataCounter(DMA1_Channel1, 4);\/\/\u8f6f\u4ef6\u89e6\u53d1\u7684\u51fd\u6570,ADC\u5f00\u542f\u8fdb\u884c\u8f6c\u6362\u3002\r\n\t\/\/\u56e0\u4e3a\u73b0\u5728ADC\u8fd8\u662f\u5355\u6b21\u6a21\u5f0f\uff0c\u8fd8\u9700\u8981\u8f6f\u4ef6\u89e6\u53d1\u4e00\u4e0bADC\u7684\u5f00\u59cb\u3002\r\n\tDMA_Cmd(DMA1_Channel1,ENABLE);\r\n\tADC_SoftwareStartConvCmd(ADC1, ENABLE);\r\n\t\/\/\u6700\u540e\uff0c\u7b49\u5f85ADC\u8f6c\u6362\u548cDMA\u8f6c\u8fd0\u5b8c\u6210\uff0c\u8fd9\u91cc\u56e0\u4e3a\u8f6c\u8fd0\u603b\u662f\u5728\u8f6c\u6362\u4e4b\u540e\u7684\uff0c\u6240\u4ee5\u6211\u4eec\u53ea\u9700\u8981\u7b49\u5f85DMA\u8f6c\u8fd0\u5b8c\u6210\u3002\r\n\twhile(DMA_GetFlagStatus(DMA1_FLAG_TC1) == RESET);\r\n\t\/\/DMA\u9700\u8981\u624b\u52a8\u6e05\u9664\u6807\u5fd7\u4f4d\r\n\tDMA_ClearFlag(DMA1_FLAG_TC1);\r\n}\r\n<\/code><\/pre>\n<p>&nbsp;<\/p>\n<pre class=\"corepress-code-pre\"><code>\/\/\u903b\u8f91\u51fd\u6570\u4ee3\u7801\r\nextern uint16_t AD_Value[4];\r\nint main(void){\r\n\tOLED_Init();\r\n\tAD_Init();\r\n\tOLED_ShowString(1,1,\"AD0:\");\/\/\u5b57\u7b26\u4e32\r\n\tOLED_ShowString(2,1,\"AD1:\");\/\/\u5b57\u7b26\u4e32\r\n\tOLED_ShowString(3,1,\"AD2:\");\/\/\u5b57\u7b26\u4e32\r\n\tOLED_ShowString(4,1,\"AD3:\");\/\/\u5b57\u7b26\u4e32\r\n\twhile(1)\r\n\t{\r\n\t\tAD_GetValue();\r\n\t\t\r\n\t\tOLED_ShowNum(1,5,AD_Value[0],4); \/\/\u5341\u8fdb\u5236\u65e0\u7b26\u53f7\u6570\r\n\t\tOLED_ShowNum(2,5,AD_Value[1],4); \/\/\u5341\u8fdb\u5236\u65e0\u7b26\u53f7\u6570\r\n\t\tOLED_ShowNum(3,5,AD_Value[2],4); \/\/\u5341\u8fdb\u5236\u65e0\u7b26\u53f7\u6570\r\n\t\tOLED_ShowNum(4,5,AD_Value[3],4); \/\/\u5341\u8fdb\u5236\u65e0\u7b26\u53f7\u6570\r\n\t\tDelay_ms(100);\r\n\t}\r\n}<\/code><\/pre>\n<p>&nbsp;<\/p>\n<p>ADC\u8fde\u7eed\u626b\u63cf+DMA\u5faa\u73af\u8f6c\u8fd0\u6a21\u5f0f\uff1a<\/p>\n<pre class=\"corepress-code-pre\"><code>uint16_t AD_Value[4];\r\nvoid AD_Init()\r\n{\r\n\t\/\/\u5f00\u542fADC1\u3001GPIOA\u3001DMA1\u7684\u65f6\u949f\r\n\tRCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);\r\n\tRCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1,ENABLE);\r\n\tRCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);\r\n\t\r\n\t\/\/\u914d\u7f6eADCCLK\uff0c6\u5206\u9891\uff0cADCCLK = 72MHz\/6= 12MHz\r\n\tRCC_ADCCLKConfig(RCC_PCLK2_Div6);\r\n\t\r\n\t\/\/\u914d\u7f6eGPIO\uff0c\u521d\u59cb\u5316PA0\u5f15\u811a\r\n\tGPIO_InitTypeDef GPIO_InitStructure;\r\n\tGPIO_InitStructure.GPIO_Mode=GPIO_Mode_AIN;\/\/\u6a21\u62df\u8f93\u5165\r\n\t\/*\u5728AIN\u6a21\u5f0f\u4e0b\uff0cGPIO\u53e3\u662f\u65e0\u6548\u7684\uff0c\u65ad\u5f00GPIO\u9632\u6b62GPIO\u53e3\u7684\u8f93\u5165\u8f93\u51fa\u5bf9\u6a21\u62df\u7535\u538b\u9020\u6210\u5e72\u6270\u3002\r\n\t\t\u6240\u4ee5AIN\u6a21\u5f0f\u662fADC\u7684\u4e13\u5c5e\u6a21\u5f0f\u3002*\/\r\n\tGPIO_InitStructure.GPIO_Pin=GPIO_Pin_0 |GPIO_Pin_1 |GPIO_Pin_2 |GPIO_Pin_3;\r\n\tGPIO_Init(GPIOA,&amp;GPIO_InitStructure); \r\n\t\r\n\t\/\/\u9009\u62e9\u89c4\u5219\u7ec4\u7684\u8f93\u5165\u901a\u9053\u3002\u91c7\u6837\u65f6\u95f4\u662f55.5\u4e2aADC\u5468\u671f\u3002\r\n\t\/\/\u8fd9\u4e2a\u51fd\u6570\u7684\u610f\u601d\u662f\uff0c\u5728\u89c4\u5219\u7ec4\u5e8f\u52171\u7684\u4f4d\u7f6e\u653e\u5165\u901a\u9053x\uff0cx\u7ecf\u8fc7\u5916\u90e8\u4f20\u8f93\u5f97\u77e5\u3002\r\n\tADC_RegularChannelConfig(ADC1,ADC_Channel_0,1,ADC_SampleTime_55Cycles5);\r\n\tADC_RegularChannelConfig(ADC1,ADC_Channel_1,2,ADC_SampleTime_55Cycles5);\r\n\tADC_RegularChannelConfig(ADC1,ADC_Channel_2,3,ADC_SampleTime_55Cycles5);\r\n\tADC_RegularChannelConfig(ADC1,ADC_Channel_3,4,ADC_SampleTime_55Cycles5);\r\n\t\r\n\t\/\/\u914d\u7f6eADC\r\n\tADC_InitTypeDef ADC_InitStruct;\t\r\n\t\t\/\/ADC\u5de5\u4f5c\u6a21\u5f0f\uff0c\u914d\u7f6e\u72ec\u7acb\u6a21\u5f0f\u6216\u8005\u53ccADC\u6a21\u5f0f\u3002\r\n\tADC_InitStruct.ADC_Mode=ADC_Mode_Independent; \r\n\t\t\/\/\u6570\u636e\u5bf9\u9f50\uff0c\u9009\u62e9\u53f3\u5bf9\u9f50\u3002\r\n\tADC_InitStruct.ADC_DataAlign=ADC_DataAlign_Right;\t\r\n\t\t\/\/\u5916\u90e8\u89e6\u53d1\u8f6c\u6362\u9009\u62e9\uff0c\u5c31\u662f\u89e6\u53d1\u63a7\u5236\u7684\u89e6\u53d1\u6e90\u3002\r\n\t\t\/\/\u9009\u62e9\u4e0d\u662f\u4f7f\u7528\u5916\u90e8\u89e6\u53d1\uff0c\u5c31\u662f\u8f6f\u4ef6\u89e6\u53d1\u7684\u610f\u601d\u3002\r\n\tADC_InitStruct.ADC_ExternalTrigConv=ADC_ExternalTrigConv_None;\r\n\t\t\/\/\u8fde\u7eed\u8f6c\u6362\u6a21\u5f0f\uff0c\u9009\u62e9\u8fde\u7eed\u8f6c\u6362\u8fd8\u662f\u5355\u6b21\u8f6c\u6362\u3002\r\n\tADC_InitStruct.ADC_ContinuousConvMode=ENABLE;\r\n\t\t\/\/\u626b\u63cf\u8f6c\u6362\u6a21\u5f0f\uff0c\u9009\u62e9\u626b\u63cf\u6a21\u5f0f\u8fd8\u662f\u975e\u626b\u63cf\u6a21\u5f0f\u3002\r\n\tADC_InitStruct.ADC_ScanConvMode=ENABLE;\r\n\t    \/\/\u901a\u9053\u6570\u76ee\uff0c\u6307\u5b9a\u5728\u626b\u63cf\u6a21\u5f0f\u4e0b\uff0c\u603b\u5171\u4f1a\u7528\u51e0\u4e2a\u901a\u9053\u3002\r\n\t\t\/*\u5176\u5b9e\u8fd9\u4e2a\u53c2\u6570\u53ea\u5728\u626b\u63cf\u6a21\u5f0f\u4e0b\u624d\u9700\u8981\u7528\uff0c\r\n\t\t\u5982\u679c\u662f\u975e\u626b\u63cf\u6a21\u5f0f\uff0c\u90a3\u6574\u4e2a\u5217\u8868\u53ea\u6709\u7b2c\u4e00\u4e2a\u5e8f\u5217\u6709\u7528*\/\r\n\tADC_InitStruct.ADC_NbrOfChannel=4;\r\n\t\r\n\tADC_Init(ADC1,&amp;ADC_InitStruct);\r\n\t\r\n\r\n\t\/\/\u914d\u7f6eDMA\u521d\u59cb\u5316\u51fd\u6570\r\n\tDMA_InitTypeDef DMA_InitStructure;\t\r\n\t\/*\u524d\u516d\u4e2a\u6210\u5458\u662f\u5916\u8bbe\u7ad9\u70b9\u7684\u8d77\u59cb\u5730\u5740\u3001\u6570\u636e\u5bbd\u5ea6\u3001\u5730\u5740\u662f\u5426\u81ea\u589e\r\n\t\u548c\u5b58\u50a8\u5668\u7ad9\u70b9\u7684\u8d77\u59cb\u5730\u5740\u3001\u6570\u636e\u5bbd\u5ea6\u3001\u5730\u5740\u662f\u5426\u81ea\u589e*\/\r\n\tDMA_InitStructure.DMA_PeripheralBaseAddr=(uint32_t)&amp;ADC1-&gt;DR;\/\/ADC\u5bc4\u5b58\u5668\u5730\u5740\r\n\tDMA_InitStructure.DMA_PeripheralDataSize=DMA_PeripheralDataSize_HalfWord;\/\/\u534a\u5b57\u5927\u5c0f\r\n\tDMA_InitStructure.DMA_PeripheralInc=DMA_PeripheralInc_Disable;\/\/\u4e0d\u81ea\u589e\r\n\tDMA_InitStructure.DMA_MemoryBaseAddr=(uint32_t)AD_Value;\/\/\u8d77\u59cb\u5730\u5740\r\n\tDMA_InitStructure.DMA_MemoryDataSize=DMA_MemoryDataSize_HalfWord;\/\/\u534a\u5b57\u5927\u5c0f\r\n\tDMA_InitStructure.DMA_MemoryInc=DMA_MemoryInc_Enable;\/\/\u81ea\u589e\r\n\t\/\/\u4f20\u8f93\u65b9\u5411DST\u662f\u5b58\u50a8\u5668\u5230\u5916\u8bbe\uff0cSRC\u662f\u5916\u8bbe\u5230\u5b58\u50a8\u5668\u3002\r\n\tDMA_InitStructure.DMA_DIR=DMA_DIR_PeripheralSRC;\r\n\t\/\/\u7f13\u51b2\u533a\u5927\u5c0f\uff08\u5176\u5b9e\u5c31\u662f\u4f20\u8f93\u8ba1\u6570\u5668\uff09\r\n\tDMA_InitStructure.DMA_BufferSize=4;\r\n\t\/\/\u4f20\u8f93\u6a21\u5f0f\uff08\u5176\u5b9e\u5c31\u662f\u662f\u5426\u4f7f\u7528\u81ea\u52a8\u91cd\u88c5\uff09\r\n\tDMA_InitStructure.DMA_Mode=DMA_Mode_Circular; \r\n\t\/\/\u9009\u62e9\u786c\u4ef6\u89e6\u53d1\u8fd8\u662f\u8f6f\u4ef6\u89e6\u53d1\uff0c\u4e0d\u4f7f\u7528\u8f6f\u4ef6\u89e6\u53d1\t\r\n\tDMA_InitStructure.DMA_M2M=DMA_M2M_Disable;\r\n\t\/\/\u4f18\u5148\u7ea7\uff0c\u6309\u7167\u53c2\u6570\u8981\u6c42\u7ed9\u4e2a\u4f18\u5148\u7ea7\u5c31\u884c\u4e86\r\n\tDMA_InitStructure.DMA_Priority=DMA_Priority_Medium;\r\n\tDMA_Init(DMA1_Channel1,&amp;DMA_InitStructure);\r\n\t\r\n\t\/\/DMA\u4f7f\u80fd\r\n\tDMA_Cmd(DMA1_Channel1,ENABLE);\r\n\t\r\n\t\/\/\u5f00\u542fADC\u5230DMA\u7684\u8f93\u51fa\r\n\tADC_DMACmd(ADC1,ENABLE);\r\n\t\r\n\t\/\/\u5f00\u542fADC\u7535\u6e90\r\n\tADC_Cmd(ADC1,ENABLE);\r\n\t\r\n\t\/\/ADC\u6821\u51c6\r\n\tADC_ResetCalibration(ADC1);\/\/\u590d\u4f4d\u6821\u51c6\r\n\t\/*\u83b7\u53d6\u590d\u4f4d\u6821\u51c6\u72b6\u6001\uff0c\u6240\u4ee5\u5982\u679c\u8981\u7b49\u5f85\u590d\u4f4d\u5b8c\u6210\u7684\u8bdd\uff0c\r\n\t\u8fd8\u9700\u8981\u52a0\u4e2awhile\u5faa\u73af\uff0c\u5982\u679c\u6ca1\u6709\u6821\u51c6\u5b8c\u6210\uff0c\u5c31\u5728\u8fd9\u4e2awhile\u7a7a\u5faa\u73af\u91cc\u4e00\u76f4\u7b49\u5f85\u3002*\/\r\n\twhile(ADC_GetResetCalibrationStatus(ADC1) == SET);\r\n\tADC_StartCalibration(ADC1);\/\/\u5f00\u542f\u6821\u51c6\r\n\twhile(ADC_GetCalibrationStatus(ADC1) == SET);\/\/\u7b49\u5f85\u6821\u51c6\u662f\u5426\u5b8c\u6210\u4e86\u3002\r\n\t\r\n\t\/*ADC\u89e6\u53d1 \uff1a \u5f53ADC\u89e6\u53d1\u4e4b\u540e\uff0cADC\u8fde\u7eed\u8f6c\u6362\uff0cDMA\u5faa\u73af\u8f6c\u8fd0\u3002\u4e24\u8005\u4e00\u76f4\u5728\u5de5\u4f5c\uff0c\u59cb\u7ec8\u628a\u6700\u65b0\u7684\u8f6c\u6362\r\n\t  \u7ed3\u679c\u5237\u65b0\u5230SRAM\u6570\u7ec4\u4e2d\u3002*\/\r\n\tADC_SoftwareStartConvCmd(ADC1, ENABLE);\r\n\t\r\n}<\/code><\/pre>\n<p>&nbsp;<\/p>\n<pre class=\"corepress-code-pre\"><code>\/\/\u903b\u8f91\u51fd\u6570\u4ee3\u7801\r\nextern uint16_t AD_Value[4];\r\nint main(void){\r\n\tOLED_Init();\r\n\tAD_Init();\r\n\tOLED_ShowString(1,1,\"AD0:\");\/\/\u5b57\u7b26\u4e32\r\n\tOLED_ShowString(2,1,\"AD1:\");\/\/\u5b57\u7b26\u4e32\r\n\tOLED_ShowString(3,1,\"AD2:\");\/\/\u5b57\u7b26\u4e32\r\n\tOLED_ShowString(4,1,\"AD3:\");\/\/\u5b57\u7b26\u4e32\r\n\twhile(1)\r\n\t{\r\n\t\tOLED_ShowNum(1,5,AD_Value[0],4); \/\/\u5341\u8fdb\u5236\u65e0\u7b26\u53f7\u6570\r\n\t\tOLED_ShowNum(2,5,AD_Value[1],4); \/\/\u5341\u8fdb\u5236\u65e0\u7b26\u53f7\u6570\r\n\t\tOLED_ShowNum(3,5,AD_Value[2],4); \/\/\u5341\u8fdb\u5236\u65e0\u7b26\u53f7\u6570\r\n\t\tOLED_ShowNum(4,5,AD_Value[3],4); \/\/\u5341\u8fdb\u5236\u65e0\u7b26\u53f7\u6570\r\n\t\tDelay_ms(100);\r\n\t}\r\n}<\/code><\/pre>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5bfc\u8bed \u5728\u6b63\u5f0f\u5f00\u59cbDMA\u4ee3\u7801\u4e4b\u524d\uff0c\u6211\u4eec\u5148\u82b1\u4e00\u6bb5\u65f6\u95f4\u505a\u4e2a\u5c0f\u5b9e\u9a8c\uff0c\u6765\u9a8c\u8bc1\u4e00\u4e0b\u5b58\u50a8\u5668\u6620\u50cf\u7684\u5185\u5bb9\u3002 \u770b\u4e00\u4e0b\u6211\u4eec\u5b9a\u4e49\u7684\u6570\u636e [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-802","post","type-post","status-publish","format-standard","hentry","category-stm32"],"_links":{"self":[{"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/posts\/802","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/comments?post=802"}],"version-history":[{"count":9,"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/posts\/802\/revisions"}],"predecessor-version":[{"id":818,"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/posts\/802\/revisions\/818"}],"wp:attachment":[{"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/media?parent=802"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/categories?post=802"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/aoofoo.com\/index.php\/wp-json\/wp\/v2\/tags?post=802"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}