Both ends of the cable...<\/figcaption><\/figure>\nHow the code works…<\/h3>\n
Its really simple… I wrote a C++ application to generate the alphabet. I’ll post that for download.<\/p>\n
Then a message is simply an array containing a list of pointers to smaller letter arrays. Each letter array holds a length byte followed by the binary for the letters. Binary is nice because you can tell by looking whether its right.<\/p>\n
So the code that really matters is:<\/p>\n
int* iMsg[] = {H,E,L,L,O};\r\nint iMsgLen = 5;\r\n\r\nvoid loop()\r\n{\r\n \/\/ send the next column for the current character\r\n sendByteOut(iMsg[iMsgIndex][iCharIndex]);\r\n\r\n \/\/ wait a moment\r\n delay(1);\r\n\r\n \/\/ move to the next column\r\n iCharIndex++;\r\n\r\n \/\/ have we run out of columns for this letter?\r\n if (iCharIndex == iCharLen)\r\n {\r\n \/\/ start at first column - 1 because 0 is length byte\r\n iCharIndex = 1;\r\n \/\/ and move to the next letter\r\n iMsgIndex++;\r\n }\r\n\r\n \/\/ now see if we have got to the end of the message\r\n if (iMsgIndex == iMsgLen)\r\n {\r\n \/\/ start at first letter again\r\n iMsgIndex = 0;\r\n }\r\n\r\n \/\/ set the length - this could be in an if statement - but it really doesn't make much difference\r\n iCharLen = iMsg[iMsgIndex][0];\r\n\r\n}\r\n<\/pre>\nAll the code is in the download area.<\/p>\n
Doing the synch things seems like it will be fiddly. Might come back to that after a play with TV output.<\/p>\n
Win32 .net application to generate Arduino font source code is her :\u00a0 Adruino 8 bit font creator for POV<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"Got some POV code working…. Problem is sync – not synched at all, so you can see what it says but it has no idea when to start the sequence relative to the user waving it about. We’ll investigate a switch with a weight on as a synch pulse soon. Here’s some pictures of the […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,4],"tags":[],"class_list":["post-48","post","type-post","status-publish","format-standard","hentry","category-arduino","category-arproject"],"_links":{"self":[{"href":"https:\/\/paulsarduino.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/48","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/paulsarduino.co.uk\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/paulsarduino.co.uk\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/paulsarduino.co.uk\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/paulsarduino.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=48"}],"version-history":[{"count":9,"href":"https:\/\/paulsarduino.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/48\/revisions"}],"predecessor-version":[{"id":65,"href":"https:\/\/paulsarduino.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/48\/revisions\/65"}],"wp:attachment":[{"href":"https:\/\/paulsarduino.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=48"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/paulsarduino.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=48"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/paulsarduino.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=48"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
![\"\"](\"http:\/\/paulsarduino.co.uk\/wp-content\/uploads\/2010\/07\/POVend.jpg\" "\\"POVend\\"")
<\/a>