spi = spidev.SpiDev()<\/code><\/pre><\/div>\n\n\n\n
\u30af\u30e9\u30b9\u5185\u306e\u95a2\u6570\u3092\u5b9f\u884c\u3059\u308b\u305f\u3081\u306bSpiDev\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
MCP3208\u3068\u306e\u63a5\u7d9a<\/h3>\n\n\n\n
spi.open(port,cs)<\/code><\/pre><\/div>\n\n\n\n
spi.open()\u3067MCP3208\u3068\u306e\u901a\u4fe1\u3092\u958b\u59cb\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u7b2c1\u5f15\u6570\u306eport\u306f\u30012\u7cfb\u7d71\u3042\u308bSPI\u306e\u5185\u3069\u3061\u3089\u3092\u4f7f\u7528\u3059\u308b\u304b\u9078\u629e\u3057\u307e\u3059\u3002SPI0\u306a\u30890\u3001SPI1\u306a\u30891\u306e\u6570\u5024\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u7b2c2\u5f15\u6570\u306ecs\u306f\u3001\u3069\u306e\u30c7\u30d0\u30a4\u30b9\u3068\u901a\u4fe1\u3059\u308b\u304b\u3067\u3059\u3002MCP3208\u304cCE0\u3068\u63a5\u7d9a\u3055\u308c\u3066\u3044\u308b\u306a\u30890\u3001CE\u306a\u30891\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u901a\u4fe1\u5468\u671f\u306e\u8a2d\u5b9a<\/h3>\n\n\n\n
spi.max_speed_hz = 1000000 # 1MHz<\/code><\/pre><\/div>\n\n\n\n
spi.max_speed_hz\u306b\u901a\u4fe1\u5468\u6ce2\u6570\u3092\u4ee3\u5165\u3059\u308b\u3068\u3001\u305d\u306e\u5468\u6ce2\u6570\u3067\u901a\u4fe1\u3057\u307e\u3059\u3002\u901a\u4fe1\u5468\u6ce2\u6570\u306e\u9006\u6570\u304c\u901a\u4fe1\u5468\u671f\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\u30c7\u30fc\u30bf\u8ee2\u9001<\/h3>\n\n\n\n
xfer2(list of values)<\/code><\/pre><\/div>\n\n\n\n
\u95a2\u6570xfer2\u3067\u5f15\u6570\u306e\u5024\u3092MCP3208\u3078\u8ee2\u9001\u3057\u307e\u3059\u3002<\/p>\n\n\n
\n
\n
<\/figure>\n<\/div>\n
\n
MCP3208\u304c\u30a2\u30ca\u30ed\u30b0\u8a08\u6e2c\u3057\u305f\u5024\u3092Raspberry Pi\u306b\u8ee2\u9001\u3057\u3066\u3082\u3089\u3046\u306b\u306f\u3001Raspberry Pi\u304b\u3089\u3069\u3093\u306a\u30c7\u30fc\u30bf\u3092\u8ee2\u9001\u3059\u308c\u3070\u3088\u3044\u306e\uff1f<\/p>\n<\/div>\n<\/div>\n\n\n
MCP3208\u306e\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8<\/a>\u306b\u3088\u308b\u3068\u30011\u56de\u306e\u901a\u4fe1\u30678bit(1byte)\u00d73\u306e\u30c7\u30fc\u30bf\u8ee2\u9001\u304c\u5fc5\u8981\u3067\u3059<\/span><\/strong>\u3002Raspberry Pi\u304b\u3089\u4e0b\u8a18\u306e\u3088\u3046\u306b\u8ee2\u9001\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
1byte\u76ee<\/p>\n\n\n\n
0<\/td>
0<\/td>
0<\/td>
0<\/td>
0<\/td>
1
(start bit)<\/td>
SGL\/
DIFF<\/td>
D2<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
2byte\u76ee<\/p>\n\n\n\n
D1<\/td>
D0<\/td>
X<\/td>
X<\/td>
X<\/td>
X<\/td>
X<\/td>
X<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
3byte\u76ee<\/p>\n\n\n\n
X<\/td>
X<\/td>
X<\/td>
X<\/td>
X<\/td>
X<\/td>
X<\/td>
X<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\u8aac\u660e\u306b\u3042\u305f\u308a\u3001\u30c1\u30e3\u30f3\u30cd\u30eb0\u3067\u30a2\u30ca\u30ed\u30b0\u8a08\u6e2c\u3059\u308b\u3053\u3068\u3068\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u300cSGL\/DIFF\u300d\u306f\u30011(SGL): \u7d76\u5bfe\u5024\u8a08\u6e2c\u304b\u30010(DIFF): \u30c1\u30e3\u30f3\u30cd\u30eb\u9593\u306e\u5dee\u5206\u5024\u8a08\u6e2c\u304b\u306e\u9078\u629e\u3067\u3059\u3002\u7d76\u5bfe\u5024\u3067\u8a08\u6e2c\u3057\u305f\u3044\u306e\u30671\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u7d76\u5bfe\u5024\u8a08\u6e2c\u3092\u8a2d\u5b9a\u3059\u308b\u3068\u30013bit\u30c7\u30fc\u30bf \u300cD2\/D1\/D0\u300d\u306f\u30c1\u30e3\u30f3\u30cd\u30ebNo.\u306e\u6307\u5b9a\u3067\u3059\u3002 \u30c1\u30e3\u30f3\u30cd\u30ebNo.\u6307\u5b9a\u65b9\u6cd5\u306f\u3001\u30c1\u30e3\u30f3\u30cd\u30ebNo. = 4\u00d7D2 + 2\u00d7D1 + D0 \u3068\u306a\u308a\u307e\u3059\u3002\u30a2\u30ca\u30ed\u30b0\u8a08\u6e2c\u3059\u308b\u30c1\u30e3\u30f3\u30cd\u30ebNo.\u306f0\u3067\u3059\u306e\u3067\u3001D2=0\u3001D1=0\u3001D0=0\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u300cX\u300d\u306e\u5024\u306f\u554f\u308f\u308c\u307e\u305b\u3093\u306e\u3067\u30010\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u4ee5\u4e0a\u307e\u3068\u3081\u308b\u3068\u3001Raspberry Pi\u304b\u3089MCP3208\u3078\u306e\u8ee2\u9001\u30c7\u30fc\u30bf\u306f\u30012\u9032\u6570\u8868\u8a18\u30670b00000110\u30010b00000000\u30010b00000000\u300116\u9032\u6570\u8868\u8a18\u30670x06\u30010x00\u30010x00\u3068\u306a\u308a\u307e\u3059\u3002<\/span><\/strong><\/p>\n\n\n\n
Raspberry Pi\u3067\u30a2\u30ca\u30ed\u30b0\u8a08\u6e2c\u3057\u3066\u307f\u308b<\/h2>\n\n\n\n
\u6e96\u5099\u3057\u305f\u3082\u306e<\/h3>\n\n\n\n
\n
Raspberry Pi Zero WH<\/li>\n\n\n\n
AD\u30b3\u30f3\u30d0\u30fc\u30bf MCP3208<\/li>\n\n\n\n
\u8d64\u5916\u7dda\u8ddd\u96e2\u30bb\u30f3\u30b5<\/li>\n\n\n\n
\u62b5\u6297 33k\u03a9\u00d71\u3001680\u03a9\u00d71<\/li>\n\n\n\n
\u30d6\u30ec\u30c3\u30c9\u30dc\u30fc\u30c9<\/li>\n\n\n\n
\u30b8\u30e3\u30f3\u30d1\u30ef\u30a4\u30e4 \u30aa\u30b9-\u30e1\u30b9<\/li>\n<\/ul>\n\n\n\n
\u56de\u8def\u56f3<\/h3>\n\n\n\n
<\/figure>\n\n\n\n
\u30b5\u30f3\u30d7\u30eb\u30d7\u30ed\u30b0\u30e9\u30e0<\/h3>\n\n\n\n
import spidev\nfrom time import sleep\nVref = 3.3\n \nspi = spidev.SpiDev()\nspi.open(0,0) #port 0,cs 0\nspi.max_speed_hz = 1000000 # 1MHz\n\nwhile True:\n    adc = spi.xfer2([0x06,0x00,0x00])\n    data = ((adc[1] & 0x0f) << 8) | adc[2]\n    print (str(Vref*data\/4096) + "V")\n    sleep(1)\n \nspi.close()<\/code><\/pre><\/div>\n\n\n\n
spi.xfer2()\u306e\u623b\u308a\u5024\u306f\u3001MCP3208\u304b\u3089\u53d7\u4fe1\u3057\u305f\u30a2\u30ca\u30ed\u30b0\u5024\u542b\u30808bit(1byte)\u00d73\u306e\u30c7\u30fc\u30bf\u3067\u3059\u3002<\/p>\n\n\n\n
\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u306b\u3088\u308b\u3068MCP3208\u304b\u3089\u306e\u53d7\u4fe1\u30c7\u30fc\u30bf\u306f\u4ee5\u4e0b\u306e\u5b9a\u7fa9\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
1byte\u76ee<\/p>\n\n\n\n
?<\/td>
?<\/td>
?<\/td>
?<\/td>
?<\/td>
?<\/td>
?<\/td>
?<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
2byte\u76ee<\/p>\n\n\n\n
?<\/td>
?<\/td>
?<\/td>
0
(Null)<\/td>
B11<\/td>
B10<\/td>
B9<\/td>
B8<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
3byte\u76ee<\/p>\n\n\n\n
B7<\/td>
B6<\/td>
B5<\/td>
B4<\/td>
B3<\/td>
B2<\/td>
B1<\/td>
B0<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\u30a2\u30ca\u30ed\u30b0\u5024\u306f2byte\u76ee\u306e\u4e0b\u4f4d4bit\u30683byte\u76ee\u3067\u3059\u306e\u3067<\/p>\n\n\n\n
data = ((adc[1] & 0x0f) << 8) | adc[2]<\/code><\/pre><\/div>\n\n\n\n
2byte\u76ee\u306e\u4e0b\u4f4d4bit\u306e\u307f\u62bd\u51fa\u3057\u30668bit\u5de6\u306b\u30b7\u30d5\u30c8\u3057\u30013byte\u76ee\u3068OR\u6761\u4ef6\u3092\u53d6\u308b\u3053\u3068\u3067\u30a2\u30ca\u30ed\u30b0\u5024\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\u8d64\u5916\u7dda\u30bb\u30f3\u30b5\u306b\u7269\u4f53\u3092\u8fd1\u3065\u3051\u305f\u308a\u9060\u3056\u3051\u305f\u308a\u3057\u3066\u3001\u30a2\u30ca\u30ed\u30b0\u5024\u304c\u5909\u5316\u3059\u308b\u304b\u78ba\u8a8d<\/h3>\n\n\n\n
<\/figure>\n\n\n\n
\u30b5\u30f3\u30d7\u30eb\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5b9f\u884c\u3057\u3001\u8d64\u5916\u7dda\u30bb\u30f3\u30b5\u306b\u7269\u4f53\u3092\u8fd1\u3065\u3051\u305f\u308a\u9060\u3056\u3051\u305f\u308a\u3057\u3066\u307f\u307e\u3057\u305f\u3002<\/p>\n\n\n\n
<\/figure>\n\n\n\n
\u7269\u4f53\u3092\u8fd1\u3065\u3051\u305f\u3068\u304d\u306f\u30010.18V\u3092\u793a\u3057\u3066\u3044\u305f\u306e\u306b\u5bfe\u3057\u3001\u7269\u4f53\u3092\u9060\u3056\u3051\u308b\u30682.82V\u3092\u793a\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n
Raspberry Pi\u3068MCP3208\u306fSPI\u901a\u4fe1\u3092\u6b63\u5e38\u306b\u884c\u3044\u3001Raspberry Pi\u306f\u30bb\u30f3\u30b5\u5024\u3092\u8aad\u307f\u53d6\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
\u307e\u3068\u3081<\/h2>\n\n\n\n
Raspberry Pi\u3068A\/D\u30b3\u30f3\u30d0\u30fc\u30bfMCP3208\u3092\u63a5\u7d9a\u3057\u3066\u3001\u30bb\u30f3\u30b5\u5024\u3092\u8aad\u307f\u53d6\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n
Raspberry Pi\u306fArduino\u3068\u7570\u306a\u308a<\/span><\/strong>\u3001A\/D\u30b3\u30f3\u30d0\u30fc\u30bf\u304c\u642d\u8f09\u3055\u308c\u3066\u3044\u306a\u3044\u306e\u3067\u3001A\/D\u30b3\u30f3\u30d0\u30fc\u30bf\u3092\u5225\u9014\u7528\u610f\u3059\u308b\u3053\u3068\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n
\u4eca\u56de\u5b66\u3093\u3060\u3053\u3068\u306f<\/p>\n\n\n\n
\n
A\/D\u30b3\u30f3\u30d0\u30fc\u30bf MCP3208\u306e\u4ed5\u69d8\u306b\u3064\u3044\u3066<\/li>\n\n\n\n
SPI\u901a\u4fe1\u3059\u308b\u305f\u3081\u306espidev\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u4f7f\u3044\u65b9<\/li>\n\n\n\n
\u8d64\u5916\u7dda\u30bb\u30f3\u30b5\u3092\u7528\u3044\u305f\u30a2\u30ca\u30ed\u30b0\u5024\u306e\u8a08\u6e2c<\/li>\n<\/ul>\n\n\n\n
\u3067\u3059\u3002<\/p>\n\n\n\n
PWM\u5236\u5fa1\u3067DC\u30e2\u30fc\u30bf\u30fc\u306e\u56de\u8ee2\u901f\u5ea6\u3092\u5236\u5fa1\u3059\u308b\u65b9\u6cd5<\/a>\u3092\u5b66\u3093\u3060\u306e\u3067\u3001\u4eca\u5f8c\u306f\u5468\u56f2\u306e\u74b0\u5883\u3092A\/D\u30b3\u30f3\u30d0\u30fc\u30bf\u3067\u691c\u77e5\u3057\u3001DC\u30e2\u30fc\u30bf\u30fc\u3092\u5236\u5fa1\u3059\u308b\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u3066\u3044\u304d\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
\u6700\u5f8c\u307e\u3067\u304a\u8aad\u307f\u9802\u304d\u3042\u308a\u304c\u3068\u3046\u3054\u3056\u3044\u307e\u3057\u305f\u3002<\/p>\n\n\n\t\t
\n\t\t\t\t\t\t\t
\n\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\n\t\t\t\t\t\t\u30e9\u30ba\u30d1\u30a44\u5bfe\u5fdc\u3000\u30ab\u30e9\u30fc\u56f3\u89e3\u3000\u6700\u65b0\u3000Raspberry\u3000Pi\u3067\u5b66\u3076\u96fb\u5b50\u5de5\u4f5c\u3000\u4f5c\u308b\u3001\u52d5\u304b\u3059\u3001\u3057\u304f\u307f\u304c\u308f\u304b\u308b\uff01 \uff08\u30d6\u30eb\u30fc\u30d0\u30c3\u30af\u30b9\uff09 [ \u91d1\u4e38 \u9686\u5fd7 ]\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\n\t\t\t\t\t\t\t\t\t
\u697d\u5929\u30d6\u30c3\u30af\u30b9<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\u00a51,650\t\t\t\t\t\t\uff082024\/12\/18 10:46\u6642\u70b9 | \u697d\u5929\u5e02\u5834\u8abf\u3079\uff09<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t\tAmazon\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t\t\u697d\u5929\u5e02\u5834\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\n\t\t\t\t\t\u30dd\u30c1\u30c3\u30d7<\/span>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\n\n\n<\/a>\n","protected":false},"excerpt":{"rendered":"
Raspberry Pi\u3092\u7528\u3044\u305f\u30c7\u30d0\u30a4\u30b9\u5236\u5fa1\u306b\u306f\u3001\u6e29\u5ea6\u30bb\u30f3\u30b5\u30fc\u3084\u8ddd\u96e2\u30bb\u30f3\u30b5\u30fc\u306a\u3069\u3067\u5468\u8fba\u74b0\u5883\u3092\u691c\u77e5\u3059\u308b\u3053\u3068\u304c\u5fc5\u9808\u3067\u3059\u3002\u3067\u3082\u3001Raspberry Pi\u306b\u306fA\/D\u30b3\u30f3\u30d0\u30fc\u30bf\u304c\u5099\u308f\u3063\u3066\u3044\u306a\u3044\u3093\u3067\u3059…\u3002 \u672c\u8a18\u4e8b\u3067\u306f\u3001R […]<\/p>\n","protected":false},"author":1,"featured_media":1134,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":"","footnotes":""},"categories":[2],"tags":[],"_links":{"self":[{"href":"https:\/\/craft-gogo.com\/wp-json\/wp\/v2\/posts\/1094"}],"collection":[{"href":"https:\/\/craft-gogo.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/craft-gogo.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/craft-gogo.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/craft-gogo.com\/wp-json\/wp\/v2\/comments?post=1094"}],"version-history":[{"count":45,"href":"https:\/\/craft-gogo.com\/wp-json\/wp\/v2\/posts\/1094\/revisions"}],"predecessor-version":[{"id":3665,"href":"https:\/\/craft-gogo.com\/wp-json\/wp\/v2\/posts\/1094\/revisions\/3665"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/craft-gogo.com\/wp-json\/wp\/v2\/media\/1134"}],"wp:attachment":[{"href":"https:\/\/craft-gogo.com\/wp-json\/wp\/v2\/media?parent=1094"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/craft-gogo.com\/wp-json\/wp\/v2\/categories?post=1094"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/craft-gogo.com\/wp-json\/wp\/v2\/tags?post=1094"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}