{"id":362,"date":"2022-12-15T14:09:18","date_gmt":"2022-12-15T06:09:18","guid":{"rendered":"http:\/\/www.huangrongzhen.ink\/?p=362"},"modified":"2022-12-19T17:50:32","modified_gmt":"2022-12-19T09:50:32","slug":"%e5%ae%9a%e6%97%b6%e5%99%a8%e8%a7%a6%e5%8f%91-dma-%e5%8f%91%e9%80%81%e4%b8%b2%e5%8f%a3%e6%95%b0%e6%8d%ae","status":"publish","type":"post","link":"https:\/\/www.huangrongzhen.ink\/?p=362","title":{"rendered":"\u5b9a\u65f6\u5668\u89e6\u53d1 DMA \u53d1\u9001\u4e32\u53e3\u6570\u636e"},"content":{"rendered":"

\u4f7f\u7528\u5b9a\u65f6\u5668\u89e6\u53d1 DMA \u53d1\u9001\u4e32\u53e3\u6570\u636e\uff0c\u89e3\u51b3\u4e86\u4e32\u53e3\u4e0d\u652f\u6301 DMA \u7684\u95ee\u9898\u3002\u672c\u9a71\u52a8\u9002\u7528\u4e8e GD32F303 \u7cfb\u5217\uff0c… <\/p><\/div>\n\n\n

<\/span>\u80cc\u666f<\/span><\/h2>\n\n\n\n

\u6709\u4e9b\u65f6\u5019\u4e32\u53e3\u4e0d\u652f\u6301 DMA\uff0c\u5c31\u6bd4\u5982 GD32F303RCT6\uff0c\u8be5\u5904\u7406\u5668\u6709 5 \u4e2a\u4e32\u53e3\uff0c\u5206\u522b\u662f UART0 ~ UART4\uff0c\u5176\u4e2d UART0 ~ UART3 \u652f\u6301 DMA\uff0c\u4f46 UART4 \u5e76\u4e0d\u652f\u6301 DMA\u3002\u4f7f\u7528 DMA \u505a\u6570\u636e\u642c\u8fd0\u786e\u5b9e\u65b9\u4fbf\uff0c\u5982\u679c\u6211\u4eec\u60f3\u8ba9\u7528 DMA \u53d1\u9001\u6216\u63a5\u6536 UART4 \u6570\u636e\uff0c\u600e\u4e48\u529e\uff1f\u8fd9\u65f6\u5019\u53ef\u4ee5\u53bb\u53c2\u770b\u624b\u518c\u67e5\u770b DMA1 \u5404\u901a\u9053\u8bf7\u6c42\u8868\uff0c\u53ef\u4ee5\u770b\u5230 TIMERx_UP\uff0c\u8fd9\u5c31\u662f\u5b9a\u65f6\u5668\u66f4\u65b0\u901a\u9053\uff0c\u6211\u4eec\u53ef\u4ee5\u7528\u5b9a\u65f6\u5668\u7684\u66f4\u65b0\u4e8b\u4ef6\u4ee5\u4e00\u5b9a\u7684\u5468\u671f\u89e6\u53d1 DMA \u4f20\u8f93\u3002<\/p>\n\n\n\n

\u5916\u8bbe<\/td>Channel\uff10<\/td>Channel\uff11<\/td>Channel\uff12<\/td>Channel\uff13<\/td>Channel\uff14<\/td><\/tr>
TIMER\uff14<\/td>TIMER4_CH3
TIMER4_TG<\/td>		TIMER4_CH2
TIMER4_UP<\/td>		–<\/td>TIMER4_CH1<\/td>TIMER4_CH0<\/td><\/tr>
TIMER\uff15<\/td>–<\/td>–<\/td>TIMER5_UP<\/td>–<\/td>–<\/td><\/tr>
TIMER\uff16<\/td>–<\/td>–<\/td>–<\/td>TIMER6_UP<\/td>–<\/td><\/tr>
TIMER\uff17<\/td>TIMER7_CH2
TIMER7_UP<\/td>		TIMER7_CH3
TIMER7_TG
TIMER7_CMT<\/td>		TIMER7_CH0<\/td>–<\/td>TIMER7_CH1<\/td><\/tr>
ADC\uff12<\/td>–<\/td>–<\/td>–<\/td>–<\/td>ADC2<\/td><\/tr>
DAC<\/td>–<\/td>–<\/td>DAC_CH0<\/td>DAC_CH1<\/td>–<\/td><\/tr>
SPI\uff0fI2S<\/td>SPI\uff0fI2S2_RX<\/td>SPI\uff0fI2S_TX<\/td>–<\/td>–<\/td>–<\/td><\/tr>
USART<\/td>–<\/td>–<\/td>UART3_RX<\/td>–<\/td>UART3_TX<\/td><\/tr>
SDIO<\/td>–<\/td>–<\/td>–<\/td>SDIO<\/td>–<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u90a3\u4e48\u5982\u4f55\u4f7f\u7528\u5b9a\u65f6\u5668\u89e6\u53d1 DMA \u5b9e\u73b0\u4e32\u53e3\u53d1\u9001\u6570\u636e\u5462\uff1f\u4ee5 UART4 \u4e3a\u4f8b\uff0c\u5982\u679c\u914d\u7f6e\u4f7f\u80fd\u4e86\u4e32\u53e3\u53d1\u9001\u529f\u80fd\uff0c\u4e00\u65e6\u6709\u6570\u636e\u5199\u5165 USART_DATA(UART4) \u5bc4\u5b58\u5668\uff0c\u90a3\u4e48 USRT4 \u5916\u8bbe\u5c06\u542f\u52a8\u6570\u636e\u4f20\u8f93\u3002\u8fd9\u91cc\u7684\u5199\u5165\u53ef\u4ee5\u662f\u8f6f\u4ef6\u5199\u5165\uff0c\u5373\u5728\u4ee3\u7801\u91cc\u76f4\u63a5\u5411 USART_DATA(UART4) \u5bc4\u5b58\u5668\u5199\u5165\u6570\u636e\uff0c\u4e5f\u53ef\u4ee5\u662f DMA \u5199\u5165\u3002\u6b64\u65f6\u6211\u4eec\u4f1a\u60f3\u5230\u4f7f\u7528 DMA \u7684\u5185\u5b58\u5230\u5185\u5b58\u529f\u80fd\uff0c\u8fd9\u4e2a\u529f\u80fd\u5e38\u5e38\u88ab\u7528\u4e8e\u5185\u5b58\u62f7\u8d1d\uff0c\u914d\u7f6e DMA \u5c06\u4e00\u6bb5\u5185\u5b58\u91cc\u7684\u6570\u636e\u5199\u5165 USART_DATA(UART4) \u5bc4\u5b58\u5668\uff0c\u4e0d\u5c31\u53ef\u4ee5\u5b9e\u73b0 DMA \u53d1\u9001\u4e32\u53e3\u6570\u636e\u4e86\uff1f<\/p>\n\n\n\n

\u8fd9\u4e2a\u601d\u8def\u662f\u6b63\u786e\u7684\uff0c\u4f46\u8fd8\u9700\u8981\u8003\u8651\u4e00\u4e2a\u95ee\u9898\uff0c\u4e32\u53e3\u5c06\u4e00\u4e2a\u6570\u636e\u53d1\u9001\u51fa\u53bb\u662f\u9700\u8981\u6d88\u8017\u65f6\u95f4\u7684\uff0c\u4ee5 115200 \u6ce2\u7279\u7387\u4e3a\u4f8b\uff0c\u5047\u8bbe\u4e32\u53e3\u5e27\u957f\u5ea6\u4e3a 10 \u4f4d\uff0c\u90a3\u4e48\u6bcf\u79d2\u949f\u53ef\u4ee5\u4f20\u8f93 11520 \u4e2a\u5b57\u8282\uff0c\u4e5f\u5c31\u662f\u4e00\u4e2a\u5b57\u8282\u9700\u8981 86.8us \u624d\u80fd\u88ab\u53d1\u9001\u51fa\u53bb\u3002\u5982\u679c DMA \u62f7\u8d1d\u7684\u901f\u5ea6\u8fc7\u5feb\uff0c\u90a3\u4e48\u5c31\u4f1a\u9020\u6210\u6570\u636e\u4f20\u8f93\u51fa\u9519\u3002<\/p>\n\n\n\n

\u6b64\u65f6\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u5b9a\u65f6\u5668\u7684\u66f4\u65b0\u4e8b\u4ef6\u6765\u89e6\u53d1 DMA \u4f20\u8f93\uff0c\u5c06 DMA \u7684\u5185\u5b58\u5730\u5740\u8bbe\u4e3a\u9700\u8981\u53d1\u9001\u7684\u6570\u636e\u7684\u9996\u5730\u5740\uff0c\u76ee\u7684\u5730\u5740\uff08\u5916\u8bbe\u5730\u5740\uff09\u8bbe\u4e3a\u4e32\u53e3\u7684\u6570\u636e\u5bc4\u5b58\u5668\uff0c\u4f20\u8f93\u65b9\u5411\u4e3a\u5185\u5b58\u5230\u5916\u8bbe\uff0c\u8bbe\u5b9a\u597d\u4f20\u8f93\u6570\u636e\u91cf\uff0c\u4f7f\u80fd DMA \u901a\u9053\u540e\u5373\u53ef\u5f00\u542f\u81ea\u52a8\u4f20\u8f93\u3002\u5728\u6ce2\u7279\u7387 115200 \u4e0b\uff0c\u6211\u4eec\u53ef\u4ee5\u914d\u7f6e\u5b9a\u65f6\u7684\u5468\u671f\u4e3a 100us\uff0c\u53ea\u8981\u4fdd\u8bc1 DMA \u7684\u62f7\u8d1d\u901f\u5ea6\u5c0f\u4e8e\u4e32\u53e3\u53d1\u9001\u901f\u5ea6\u5373\u53ef\u3002\u5728 GD32 \u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7 timer_dma_enable \u6765\u8bbe\u7f6e\u5b9a\u65f6\u5668\u7684\u66f4\u65b0\u4e8b\u4ef6\u505a\u4e3a DMA \u7684\u89e6\u53d1\u6e90\uff0c\u4f46\u5fc5\u987b\u8981\u7981\u7528 DMA \u7684\u5185\u5b58\u5230\u5185\u5b58\u6a21\u5f0f\uff0c\u5982\u4e0b\u6240\u793a\u3002<\/p>\n\n\n\n

timer_dma_enable(TIMER5, TIMER_DMA_UPD);                        \/\/\u5b9a\u65f6\u5668\u66f4\u65b0\u4e8b\u4ef6\u4f5c\u4e3aDMA\u89e6\u53d1\u6e90\ndma_memory_to_memory_disable(DMA1, DMA_CH2);                    \/\/\u7981\u7528\u5185\u5b58\u5230\u5185\u5b58<\/code><\/pre>\n\n\n\n
<\/span>\u6e90\u7801<\/span><\/h2>\n\n\n\n
UART-Timer-Trig-DMA<\/a>\u4e0b\u8f7d<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"
\u4f7f\u7528\u5b9a\u65f6\u5668\u89e6\u53d1 DMA \u53d1\u9001\u4e32\u53e3\u6570\u636e\uff0c\u89e3\u51b3\u4e86\u4e32\u53e3\u4e0d\u652f\u6301 DMA \u7684\u95ee\u9898\u3002\u672c\u9a71\u52a8\u9002\u7528\u4e8e GD32F303 \u7cfb\u5217\uff0c\u4e5f\u53ef\u4ee5\u5f88\u65b9\u4fbf\u7684\u79fb\u690d\u5230\u5176\u5b83 GD32 \u6216 STM32 \u5e73\u53f0\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"_links":{"self":[{"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=\/wp\/v2\/posts\/362"}],"collection":[{"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=362"}],"version-history":[{"count":6,"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=\/wp\/v2\/posts\/362\/revisions"}],"predecessor-version":[{"id":369,"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=\/wp\/v2\/posts\/362\/revisions\/369"}],"wp:attachment":[{"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=362"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=362"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=362"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}