{"id":95,"date":"2020-07-23T12:04:00","date_gmt":"2020-07-23T15:04:00","guid":{"rendered":"https:\/\/www.hugocristo.com.br\/projetos\/milton\/blog\/?p=95"},"modified":"2020-08-09T13:35:24","modified_gmt":"2020-08-09T16:35:24","slug":"milton-3","status":"publish","type":"post","link":"https:\/\/www.hugocristo.com.br\/projetos\/milton\/blog\/2020\/07\/23\/milton-3\/","title":{"rendered":"Milton #3"},"content":{"rendered":"\n<figure class=\"wp-block-embed-youtube wp-block-embed is-type-video is-provider-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Milton #3 (23\/07\/2020)\" width=\"580\" height=\"326\" src=\"https:\/\/www.youtube.com\/embed\/4zxRxwGyahE?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A biblioteca <a rel=\"noreferrer noopener\" href=\"https:\/\/github.com\/smaffer\/espvgax\" target=\"_blank\">ESPVGAx de Sandro Maffiodo<\/a> \u00e9 um feito. Com conex\u00f5es muito simples e alguns resistores \u00e9 poss\u00edvel gerar sinal VGA em duas cores. A plataforma destino \u00e9 a Esp8266, que tenho na encarna\u00e7\u00e3o NodeMCU, com programa\u00e7\u00e3o direto na <a rel=\"noreferrer noopener\" href=\"https:\/\/arduino-esp8266.readthedocs.io\/en\/latest\/\" target=\"_blank\">IDE do Arduino<\/a>.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-medium\"><a href=\"https:\/\/www.hugocristo.com.br\/projetos\/milton\/blog\/wp-content\/uploads\/2020\/08\/2307b.jpg\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/www.hugocristo.com.br\/projetos\/milton\/blog\/wp-content\/uploads\/2020\/08\/2307b-300x300.jpg\" alt=\"Conex\u00f5es para sa\u00edda VGA (1bit)\" class=\"wp-image-97\" srcset=\"https:\/\/www.hugocristo.com.br\/projetos\/milton\/blog\/wp-content\/uploads\/2020\/08\/2307b-300x300.jpg 300w, https:\/\/www.hugocristo.com.br\/projetos\/milton\/blog\/wp-content\/uploads\/2020\/08\/2307b-150x150.jpg 150w, https:\/\/www.hugocristo.com.br\/projetos\/milton\/blog\/wp-content\/uploads\/2020\/08\/2307b.jpg 600w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption>Conex\u00f5es para sa\u00edda VGA (1bit)<\/figcaption><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">O n\u00famero reduzido de cores tornaria a plataforma menos atraente e o pr\u00f3prio Sandro Maffiodo produziu <a rel=\"noreferrer noopener\" href=\"https:\/\/github.com\/smaffer\/espvgax2\" target=\"_blank\">outra vers\u00e3o com at\u00e9 16 cores<\/a>. Nos testes n\u00e3o foi poss\u00edvel explorar os limites de processamento do Esp8266 na gera\u00e7\u00e3o do sinal, especialmente quando outras rotinas est\u00e3o em execu\u00e7\u00e3o. Segundo o autor do projeto, n\u00e3o \u00e9 poss\u00edvel acessar o Wi-fi ou realizar comunica\u00e7\u00e3o serial durante o redesenho do v\u00eddeo.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-medium\"><a href=\"https:\/\/www.hugocristo.com.br\/projetos\/milton\/blog\/wp-content\/uploads\/2020\/08\/2307c.jpg\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"212\" src=\"https:\/\/www.hugocristo.com.br\/projetos\/milton\/blog\/wp-content\/uploads\/2020\/08\/2307c-300x212.jpg\" alt=\"Gera\u00e7\u00e3o de sinal branco (fundo azul)\" class=\"wp-image-98\" srcset=\"https:\/\/www.hugocristo.com.br\/projetos\/milton\/blog\/wp-content\/uploads\/2020\/08\/2307c-300x212.jpg 300w, https:\/\/www.hugocristo.com.br\/projetos\/milton\/blog\/wp-content\/uploads\/2020\/08\/2307c-768x541.jpg 768w, https:\/\/www.hugocristo.com.br\/projetos\/milton\/blog\/wp-content\/uploads\/2020\/08\/2307c.jpg 851w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption>Gera\u00e7\u00e3o de sinal VGA &#8211; primeiro plano branco, fundo azul<\/figcaption><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Manipular <em>literalmente <\/em>bits para gerar o sinal VGA \u00e9 uma arte. Tem gente que constr\u00f3i placas de v\u00eddeo caseiras <a rel=\"noreferrer noopener\" href=\"https:\/\/en.wikipedia.org\/wiki\/Bit_banging\" target=\"_blank\">bitbangueando<\/a> as cores. E h\u00e1 pessoas geniais, como <a href=\"https:\/\/eater.net\/\" target=\"_blank\" rel=\"noreferrer noopener\">Ben Eater<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-embed-youtube wp-block-embed is-type-video is-provider-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"The world&#039;s worst video card?\" width=\"580\" height=\"326\" src=\"https:\/\/www.youtube.com\/embed\/l7rce6IQDWs?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Por enquanto ficarei na vers\u00e3o <em>light<\/em> da solu\u00e7\u00e3o \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A biblioteca ESPVGAx de Sandro Maffiodo \u00e9 um feito. Com conex\u00f5es muito simples e alguns resistores \u00e9 poss\u00edvel gerar sinal VGA em duas cores. A plataforma destino \u00e9 a Esp8266, que tenho na encarna\u00e7\u00e3o NodeMCU, com programa\u00e7\u00e3o direto na IDE do Arduino. O n\u00famero reduzido de cores tornaria a plataforma menos atraente e o pr\u00f3prio [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[5],"tags":[23,19,21,18,20],"class_list":["post-95","post","type-post","status-publish","format-standard","hentry","category-atualizacoes","tag-ben-eater","tag-esp8266","tag-espvgax","tag-nodemcu","tag-vga"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.hugocristo.com.br\/projetos\/milton\/blog\/wp-json\/wp\/v2\/posts\/95","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hugocristo.com.br\/projetos\/milton\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hugocristo.com.br\/projetos\/milton\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hugocristo.com.br\/projetos\/milton\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hugocristo.com.br\/projetos\/milton\/blog\/wp-json\/wp\/v2\/comments?post=95"}],"version-history":[{"count":5,"href":"https:\/\/www.hugocristo.com.br\/projetos\/milton\/blog\/wp-json\/wp\/v2\/posts\/95\/revisions"}],"predecessor-version":[{"id":108,"href":"https:\/\/www.hugocristo.com.br\/projetos\/milton\/blog\/wp-json\/wp\/v2\/posts\/95\/revisions\/108"}],"wp:attachment":[{"href":"https:\/\/www.hugocristo.com.br\/projetos\/milton\/blog\/wp-json\/wp\/v2\/media?parent=95"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hugocristo.com.br\/projetos\/milton\/blog\/wp-json\/wp\/v2\/categories?post=95"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hugocristo.com.br\/projetos\/milton\/blog\/wp-json\/wp\/v2\/tags?post=95"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}