{"id":1090,"date":"2023-03-03T13:17:27","date_gmt":"2023-03-03T05:17:27","guid":{"rendered":"https:\/\/www.huangrongzhen.ink\/?p=1090"},"modified":"2023-03-03T17:29:42","modified_gmt":"2023-03-03T09:29:42","slug":"arm-dsp-%e5%ba%93%e4%b8%8b-fir-%e7%9a%84%e4%bd%bf%e7%94%a8","status":"publish","type":"post","link":"https:\/\/www.huangrongzhen.ink\/?p=1090","title":{"rendered":"ARM DSP \u5e93\u4e0b FIR \u7684\u4f7f\u7528"},"content":{"rendered":"<div class=\"wp-block-post-excerpt\"><p class=\"wp-block-post-excerpt__excerpt\">\u8bb0\u5f55 ARM DSP \u5e93\u4e0b FIR \u6ee4\u6ce2\u5668\u7684\u4f7f\u7528\uff0c\u65b9\u4fbf\u540e\u7eed\u4f7f\u7528\u3002 <\/p><\/div>\n\n\n<h2 class=\"wp-block-heading\">\u4f7f\u7528\u793a\u4f8b<\/h2>\n\n\n\n<p>ARM DSP \u5e93\u4e0b FIR \u6ee4\u6ce2\u5668\u7684\u4f7f\u7528\u5982\u4e0b\u6240\u793a\uff0cFIR \u4ee5\u5757\u7684\u5f62\u5f0f\u6ee4\u6ce2\uff0c\u793a\u4f8b\u4e2d\u7684\u91c7\u6837\u70b9\u6570\u548c\u6ee4\u6ce2\u5feb\u5927\u5c0f\u53ef\u4ee5\u662f\u4e00\u6837\u7684\u3002FIR \u7cfb\u6570\u8868\u7531 Matlab \u7684 fdatool \u5de5\u5177\u5bfc\u51fa\uff0c\u793a\u4f8b\u4ee3\u7801\u4e2d\u7684\u7cfb\u6570\u5bf9\u5e94\u7684\u53c2\u6570\u4e3a 500Hz \u91c7\u6837\u7387\u3001\u4f4e\u901a\u6ee4\u6ce2\u3001\u6c49\u660e\u7a97\u300116 \u9636\u3001\u622a\u6b62\u9891\u7387\u4e3a 10Hz\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"c\" class=\"language-c\">#include \"arm_math.h\"\n\n#define SAMPLES_NUM 1024 \/\/\u91c7\u6837\u70b9\u6570\n#define BLOCK_SIZE  8    \/\/FIR \u6ee4\u6ce2\u5757\u5927\u5c0f\n#define NUM_TAPS    17   \/\/\u6ee4\u6ce2\u5668\u7cfb\u6570\u4e2a\u6570\n\nvoid SGM58031Task(void)\n{\n  \/\/\u72b6\u6001\u7f13\u5b58\uff0c\u5927\u5c0fnumTaps + blockSize - 1\n  static float32_t s_arrFirStateF32[BLOCK_SIZE + NUM_TAPS - 1];\n\n  \/\/FIR \u7cfb\u6570\u8868\n  const float32_t s_arrFirCoeffF32[NUM_TAPS] = {\n    0.007925619371,  0.01188393217,  0.02299686521,  0.04016345739,  0.06104932353,\n      0.08247635514,   0.1009953544,   0.1135294884,   0.1179592237,   0.1135294884,\n      0.1009953544,  0.08247635514,  0.06104932353,  0.04016345739,  0.02299686521,\n      0.01188393217, 0.007925619371\n  };\n\n  \/\/\u5176\u5b83\u9759\u6001\u53d8\u91cf\n  static u8 s_iInitFlag = 1;\n  static arm_fir_instance_f32 s_FirF32;\n  static float32_t s_arrInput[SAMPLES_NUM];\n  static float32_t s_arrOutput[SAMPLES_NUM];\n  static u32 s_iSampleCnt = 0;\n\n  \/\/\u5c40\u90e8\u53d8\u91cf\n  i16 adc;\n  float32_t volt;\n  u32 blockBeginAddr, i;\n\n  \/\/\u9700\u8981\u521d\u59cb\u5316\n  if(0 != s_iInitFlag)\n  {\n    s_iInitFlag = 0;\n    arm_fir_init_f32(&amp;s_FirF32, NUM_TAPS, (float32_t*)&amp;s_arrFirCoeffF32[0], &amp;s_arrFirStateF32[0], BLOCK_SIZE);\n    s_iSampleCnt = 0;\n  }\n\n  \/\/\u83b7\u53d6\u8f6c\u6362\u7ed3\u679c\n  adc = GetADC();\n\n  volt = 3.3 * adc \/ 4096.0;\n\n  \/\/\u91c7\u6837\n  s_arrInput[s_iSampleCnt] = volt;\n  s_iSampleCnt = (s_iSampleCnt + 1) % SAMPLES_NUM;\n\n  \/\/\u91c7\u591f\u4e86\u4e00\u6279\u6570\u636e\n  if(0 == (s_iSampleCnt % BLOCK_SIZE))\n  {\n    \/\/\u8ba1\u7b97\u5757\u8d77\u59cb\u5730\u5740\n    if(0 == s_iSampleCnt)\n    {\n      blockBeginAddr = SAMPLES_NUM - BLOCK_SIZE;\n    }\n    else\n    {\n      blockBeginAddr = s_iSampleCnt - BLOCK_SIZE;\n    }\n\n    \/\/\u6ee4\u6ce2\n    arm_fir_f32(&amp;s_FirF32, s_arrInput + blockBeginAddr, s_arrOutput + blockBeginAddr, BLOCK_SIZE);\n\n    \/\/\u6253\u5370\n    for(i = 0; i &lt; BLOCK_SIZE; i++)\n    {\n      printf(\"%.3f\\r\\n\", s_arrOutput[blockBeginAddr + i]);\n    }\n  }\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u8bb0\u5f55 ARM DSP \u5e93\u4e0b FIR \u6ee4\u6ce2\u5668\u7684\u4f7f\u7528\uff0c\u65b9\u4fbf\u540e\u7eed\u4f7f\u7528\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,6],"tags":[],"_links":{"self":[{"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=\/wp\/v2\/posts\/1090"}],"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=1090"}],"version-history":[{"count":4,"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=\/wp\/v2\/posts\/1090\/revisions"}],"predecessor-version":[{"id":1103,"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=\/wp\/v2\/posts\/1090\/revisions\/1103"}],"wp:attachment":[{"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1090"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1090"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.huangrongzhen.ink\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1090"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}