{"id":866,"date":"2015-08-20T12:20:54","date_gmt":"2015-08-20T03:20:54","guid":{"rendered":"http:\/\/otsuka.biz\/blog1\/?p=866"},"modified":"2024-02-12T15:45:36","modified_gmt":"2024-02-12T06:45:36","slug":"dtmf-dual-tone-multi-frequency","status":"publish","type":"post","link":"https:\/\/otsuka.biz\/blog1\/dtmf-dual-tone-multi-frequency\/","title":{"rendered":"DTMF decoder using CM8870 and PIC18F2550"},"content":{"rendered":"

<< Introduction in Japanese >><\/p>\n

\u5b50\u4f9b\u306e\u9803\u3001\u96e2\u308c\u305f\u5834\u6240\u304b\u3089\u4eba\u304c\u610f\u601d\u3084\u529b\u3092\u4f1d\u3048\u308b\u30c6\u30ec\u30d1\u30b7\u30fc\u3084\u9b54\u8853\u306e\u8a71\u3092\u805e\u304f\u6642\u3001\u305d\u306e\u795e\u79d8\u3055\u306b\u5fc3\u304c\u8e8d\u3063\u305f\u3082\u306e\u3067\u3042\u308b\u3002\u3057\u304b\u3057\u73fe\u5b9f\u7684\u306b\u306f\u3001\u751f\u7269\u5b66\u7684\u306b\u4eba\u9593\u304c\u6301\u3064\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306f\u3001\u8996\u899a\u3001\u8074\u899a\u3001\u55c5\u899a\u3001\u5473\u899a\u3001\u89e6\u899a\u306e\uff15\u3064\u306e\u611f\u899a\u5668\u5b98\u306e\u307f\u3067\u3042\u308b\u3002\u305d\u3057\u3066\u79d1\u5b66\u6280\u8853\u304c\u9032\u6b69\u3057\u305f\u73fe\u5728\u3067\u3082\u3001\u4eba\u9593\u306e\uff15\u611f\u306e\u4e2d\u3067\u9060\u9694\u306b\u4f1d\u3048\u308b\u4e8b\u304c\u51fa\u6765\u308b\u306e\u306f\u8996\u899a\u60c5\u5831\u3068\u8074\u899a\u60c5\u5831\u306e\u307f\u3067\u3001\u55c5\u899a\u3001\u5473\u899a\u3001\u89e6\u899a\u3092\u96e2\u308c\u305f\u5834\u6240\u3078\u6b63\u78ba\u306b\u8ee2\u9001\u3059\u308b\u4e8b\u306f\u672a\u3060\u51fa\u6765\u3066\u3044\u306a\u3044\u3002
\n\u4eca\u56de\u306e\u96fb\u5b50\u5de5\u4f5c\u306e\u30c6\u30fc\u30de\u306f DTMF (Dual Tone Multi Frequency) \u3068\u3057\u305f\u3002\u4f55\u6545\u306a\u3089\u3001\u96fb\u8a71\u5668\u306b\u3088\u308b\u60c5\u5831\u4f1d\u9054\u3067 DTMF \u306f\u73fe\u5f79\u306e\u6280\u8853\u3067\u3042\u308a\u3001\u6a5f\u68b0\u3092\u9060\u9694\u64cd\u4f5c\u3059\u308b\u624b\u6bb5\u3068\u3057\u3066\u306e\u6709\u7528\u6027\u3092\u8003\u3048\u3066\u307f\u3088\u3046\u3068\u601d\u3063\u305f\u3002<\/p>\n

DTMF signals are decoded\u00a0and displayed on a LCD.<\/p>\n

\"Dual-Tone<\/a><\/p>\n

\"Dual-Tone<\/a><\/p>\n

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

<<\u00a0Test\u00a0board\u00a0>><\/p>\n

The\u00a0test board is the\u00a0UBW\u00a0board\u00a0of my page on Jan. 16, 2014.<\/p>\n

Bootloader : RC0 – LED, RC1 – LED, RC2 – switch2 (pull down), MCLR – switch1 (pull down);<\/p>\n

LCD (SC1602BBWB-XA-GB-G) : RS – RB2, R\/W – GND, E – RB3, Data bus – RB4\uff5eRB7;<\/p>\n

CM8870 (DTMF Receiver)\u00a0:\u00a0RA0 – Q1, RA1 – Q2, RA2 – Q3, RA3 – Q4,\u00a0RB0\/INT0 – StD<\/p>\n

<< Sample code >><\/p>\n

\n\n
\n
\n
\n
\"\u30a2\u30a4\u30b3\u30f3\"<\/div>\n
\n

DTMF<\/a><\/h3>\n
<\/i> 1 \u30d5\u30a1\u30a4\u30eb <\/i> 328.70 KB<\/div>\n <\/div>\n
\n \u30c0\u30a6\u30f3\u30ed\u30fc\u30c9<\/a>\n <\/div>\n <\/div>\n <\/div>\n<\/div>\n\n<\/div> (compiled with MPLAB X IDE and XC8)<\/p>\n

<<\u00a0Tone generator >><\/p>\n

AiglonDTMF (freeware)<\/p>\n

<<\u00a0Reference >><\/p>\n

1)\u00a0\u00a0\u00a0 \u79cb\u6708\u96fb\u5b50\u901a\u5546\uff1aDTMF\u89e3\u8aad\u6a5f\u30ad\u30c3\u30c8 (\u00a0http:\/\/akizukidenshi.com\/catalog\/contents2\/kairo.aspx<\/a> )<\/p>\n

2)\u00a0\u00a0\u00a0 \u643a\u5e2f\u96fb\u8a71\u3067\u30ea\u30e2\u30fc\u30c8\u64cd\u4f5c\u304c\u3067\u304d\u308b\u96fb\u5b50\u5de5\u4f5c. (2011) CQ Publishing Co.,Ltd (Japan)
\n( http:\/\/www.cqpub.co.jp\/hanbai\/books\/17\/17991.htm<\/a> )<\/p>\n","protected":false},"excerpt":{"rendered":"

<< Introduction in Japanese >> \u5b50\u4f9b\u306e\u9803\u3001\u96e2\u308c\u305f\u5834\u6240\u304b\u3089\u4eba\u304c\u610f\u601d\u3084\u529b\u3092\u4f1d\u3048\u308b\u30c6\u30ec\u30d1\u30b7\u30fc\u3084\u9b54\u8853\u306e\u8a71\u3092\u805e\u304f\u6642\u3001\u305d\u306e\u795e\u79d8\u3055\u306b\u5fc3\u304c\u8e8d\u3063\u305f\u3082\u306e\u3067\u3042\u308b\u3002\u3057\u304b\u3057\u73fe\u5b9f\u7684\u306b\u306f\u3001\u751f\u7269\u5b66\u7684 […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"vkexunit_cta_each_option":"","footnotes":""},"categories":[2,10],"tags":[],"class_list":["post-866","post","type-post","status-publish","format-standard","hentry","category-pic","category-telephone"],"_links":{"self":[{"href":"https:\/\/otsuka.biz\/blog1\/wp-json\/wp\/v2\/posts\/866","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/otsuka.biz\/blog1\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/otsuka.biz\/blog1\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/otsuka.biz\/blog1\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/otsuka.biz\/blog1\/wp-json\/wp\/v2\/comments?post=866"}],"version-history":[{"count":2,"href":"https:\/\/otsuka.biz\/blog1\/wp-json\/wp\/v2\/posts\/866\/revisions"}],"predecessor-version":[{"id":3354,"href":"https:\/\/otsuka.biz\/blog1\/wp-json\/wp\/v2\/posts\/866\/revisions\/3354"}],"wp:attachment":[{"href":"https:\/\/otsuka.biz\/blog1\/wp-json\/wp\/v2\/media?parent=866"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/otsuka.biz\/blog1\/wp-json\/wp\/v2\/categories?post=866"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/otsuka.biz\/blog1\/wp-json\/wp\/v2\/tags?post=866"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}