{"id":548,"date":"2023-04-01T00:14:44","date_gmt":"2023-03-31T15:14:44","guid":{"rendered":"https:\/\/blog.y-lab.org\/?p=548"},"modified":"2023-07-23T15:25:00","modified_gmt":"2023-07-23T06:25:00","slug":"stm32g071%e3%81%aeadc-calibration","status":"publish","type":"post","link":"https:\/\/blog.y-lab.org\/?p=548","title":{"rendered":"STM32G071\u306eADC Calibration"},"content":{"rendered":"

\"\"<\/a><\/p>\n

\u6700\u8fd1\u306f STM32G071 \u3092\u3044\u3058\u3063\u3066\u3044\u3066\u3001USB-PD \u30c7\u30d0\u30a4\u30b9\u3092\u4f5c\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n

STM32 \u306f 12bit ADC \u3092\u642d\u8f09\u3057\u3066\u3044\u308b\u306e\u3067\u3059\u304c\u3001
\n\u5909\u63db\u5024\u304c\u5b9f\u969b\u306e\u5024\u304b\u3089\u304b\u306a\u308a\u305a\u308c\u3066\u3057\u307e\u3044\u3001\u3057\u3070\u3089\u304f\u56f0\u308a\u307e\u3057\u305f\u3002<\/p>\n

ADC \u306e\u521d\u671f\u5316\u5f8c\u3001\u5909\u63db\u524d\u306b ADC \u306e\u30aa\u30d5\u30bb\u30c3\u30c8\u306e Calibration \u304c\u5fc5\u8981\u3067\u3059\u3002
\nSTM32G071 \u306e ADC \u30e2\u30b8\u30e5\u30fc\u30eb\u306f \u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306b\u3088\u308b\u30ad\u30e3\u30ea\u30d6\u30ec\u30fc\u30b7\u30e7\u30f3\u304c\u5b9f\u88c5\u3055\u308c\u3066\u3044\u3066\u3001\u5b8c\u4e86\u5f8c\u306b ADC_CALFACT \u30ec\u30b8\u30b9\u30bf\u306b\u5024\u304c\u66f8\u304d\u8fbc\u307e\u308c\u307e\u3059\u3002
\n\u6b21\u56de\u5909\u63db\u304b\u3089\u3001CALFACT \u3067\u88dc\u6b63\u3055\u308c\u305f\u5909\u63db\u5024\u304c ADC_DR \u30ec\u30b8\u30b9\u30bf\u306b\u3088\u3063\u3066\u53d6\u5f97\u3055\u308c\u307e\u3059\u3002<\/p>\n

\"\"<\/a><\/p>\n

HAL \u3067\u306f HAL_ADCEx_Calibration_Start \u3068\u3044\u3046\u95a2\u6570\u3092\u547c\u3079\u3070\u3001\u30ad\u30e3\u30ea\u30d6\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u884c\u3057\u3066\u304f\u308c\u307e\u3059\u3002
\nSTM32CubeMX \u306e\u30b3\u30fc\u30c9\u3067\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u3051\u3070\u3088\u3044\u3067\u3059\u306d\u3002<\/p>\n

MX_ADC1_Init();\r\n\/\/ \u4e2d\u7565\r\n\/\/ call before ADC conversion has started\r\nHAL_ADCEx_Calibration_Start(&hadc1);\r\n\/\/ HAL_ADC_Start(); \u3092\u547c\u3073\u51fa\u3057\u53ef\u80fd<\/pre>\n
\u6ce8\u610f\u70b9\u306f\u3001ADC \u521d\u671f\u5316\u3057\u305f\u5f8c\u3001ADC \u5909\u63db\u505c\u6b62\u72b6\u614b\u3067 Calibration_Start \u95a2\u6570\u3092\u547c\u3070\u306a\u3051\u308c\u3070\u3044\u3051\u306a\u3044\u3068\u3044\u3046\u3053\u3068\u3067\u3001\u4f5c\u6210\u3057\u305f\u30b3\u30fc\u30c9\u3067\u306f\u30bf\u30a4\u30de\u5272\u308a\u8fbc\u307f\u304b\u3089 ADC_Start() \u3057\u3066\u3044\u305f\u306e\u3067\u3001\u30bf\u30a4\u30df\u30f3\u30b0\u306b\u3088\u3063\u3066\u306f\u305d\u306e\u5236\u7d04\u304c\u5b88\u3089\u308c\u3066\u3044\u307e\u305b\u3093\u3067\u3057\u305f\u3002
\nCalibration \u306b\u5931\u6557\u3059\u308b\u3068\u3001CALFACT \u306f\u66f4\u65b0\u3055\u308c\u305a\u30010 \u306e\u307e\u307e\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
HAL_ADCEx_Calibration_Start \u306e\u30b3\u30fc\u30c9\u306b\u3082\u305d\u306e\u6ce8\u610f\u304c\u66f8\u3044\u3066\u3042\u308b\u306e\u3067\u3001\u307e\u3042\u3061\u3083\u3093\u3068\u30b3\u30e1\u30f3\u30c8\u3092\u8aad\u3081\u3070\u3053\u3093\u306a\u3068\u3053\u308d\u3067\u5f15\u3063\u304b\u304b\u3089\u306a\u3044\u306f\u305a\u3067\u3059\u306d\u3002<\/p>\n
\u3055\u3066\u3001\u5b9f\u969b\u306b Calibration \u3055\u305b\u3066\u307f\u308b\u3068\u3001CALFACT = 69 \u3068\u3044\u3046\u5024\u304c\u8aad\u3081\u307e\u3059\u3002
\nVREF = 3.3V, 12bit \u306a\u306e\u3067\u30aa\u30d5\u30bb\u30c3\u30c8\u96fb\u5727\u306f 69×3.3\/4096 = 55mV \u3068\u3044\u3046\u8a08\u7b97\u306b\u306a\u308a\u307e\u3059\u3002\u3061\u3087\u3063\u3068\u5927\u304d\u3044\u3067\u3059\u306d\u3002CALFACT \u306f 7bit \u306a\u306e\u3067\u3001\u6700\u4e0a\u4f4d bit \u307e\u3067\u4f7f\u3063\u3066\u3044\u307e\u3059\u3002
\n\uff08QFP32 \u30d1\u30c3\u30b1\u30fc\u30b8\u3060\u3068 VREF = VDD\uff09
\nSTM32G071 \u306e\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u306b\u3088\u308b\u3068\u30aa\u30d5\u30bb\u30c3\u30c8\u8aa4\u5dee EO = 4.5LSB (max) \u3067\u3059\u304c\u3001\u3053\u308c\u306f\u30ad\u30e3\u30ea\u30d6\u30ec\u30fc\u30b7\u30e7\u30f3\u5b9f\u884c\u5f8c\u306e\u6e2c\u5b9a\u5024\u3068\u66f8\u304b\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u5b9f\u969b\u30a8\u30e9\u30c3\u30bf\u30b7\u30fc\u30c8\u3092\u898b\u308b\u3068\u3001VREF \u304c 3V \u4ee5\u4e0b\u306e\u3068\u304d\u3001\u500b\u4f53\u306b\u3088\u3063\u3066\u306f\u30aa\u30d5\u30bb\u30c3\u30c8\u8aa4\u5dee\u304c\u30ad\u30e3\u30ea\u30d6\u30ec\u30fc\u30b7\u30e7\u30f3\u306e CALFACT (0-127) \u3092\u4e0a\u56de\u3063\u3066\u3057\u307e\u3046\u3088\u3046\u3067\u3059\u3002VREF = 1.65 – 3V \u306e\u3068\u304d\u3001\u30ef\u30fc\u30b9\u30c8\u30b1\u30fc\u30b9\u306e EO = 50LSB \u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u3061\u3087\u3063\u3068\u3060\u3081\u3067\u3059\u306d\u3002<\/p>\n
\u4f55\u306b\u3057\u3066\u3082\u3001Calibration \u306f\u5fc5\u9808\u3067\u3042\u308a\u3001ADC \u505c\u6b62\u4e2d\u306b\u884c\u3046\u5fc5\u8981\u304c\u3042\u308a\u3001\u307e\u305f\u3001Calibration_Start \u306f\u624b\u52d5\u3067\u30b3\u30fc\u30c9\u3092\u633f\u5165\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3068\u3044\u3046\u3053\u3068\u306b\u6ce8\u610f\u3059\u308c\u3070\u3088\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6700\u8fd1\u306f STM32G071 \u3092\u3044\u3058\u3063\u3066\u3044\u3066\u3001USB-PD \u30c7\u30d0\u30a4\u30b9\u3092\u4f5c\u3063\u3066\u3044\u307e\u3059\u3002 STM32 \u306f 12bit ADC \u3092\u642d\u8f09\u3057\u3066\u3044\u308b\u306e\u3067\u3059\u304c\u3001 \u5909\u63db\u5024\u304c\u5b9f\u969b\u306e\u5024\u304b\u3089\u304b\u306a\u308a\u305a\u308c\u3066\u3057\u307e\u3044\u3001\u3057\u3070\u3089\u304f\u56f0\u308a\u307e\u3057\u305f\u3002 ADC \u306e\u521d […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[14,5],"tags":[],"_links":{"self":[{"href":"https:\/\/blog.y-lab.org\/index.php?rest_route=\/wp\/v2\/posts\/548"}],"collection":[{"href":"https:\/\/blog.y-lab.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.y-lab.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.y-lab.org\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.y-lab.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=548"}],"version-history":[{"count":1,"href":"https:\/\/blog.y-lab.org\/index.php?rest_route=\/wp\/v2\/posts\/548\/revisions"}],"predecessor-version":[{"id":551,"href":"https:\/\/blog.y-lab.org\/index.php?rest_route=\/wp\/v2\/posts\/548\/revisions\/551"}],"wp:attachment":[{"href":"https:\/\/blog.y-lab.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=548"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.y-lab.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=548"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.y-lab.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=548"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}