{"id":1091,"date":"2013-05-07T18:59:21","date_gmt":"2013-05-07T16:59:21","guid":{"rendered":"http:\/\/ubik75.com\/?p=1091"},"modified":"2019-03-24T11:15:35","modified_gmt":"2019-03-24T09:15:35","slug":"bus-i2c-liaison-nxt-carte-arduino-partie-2","status":"publish","type":"post","link":"https:\/\/ubik75.com\/?p=1091","title":{"rendered":"Bus I2C, liaison NXT carte Arduino, partie 2."},"content":{"rendered":"<p>Apr\u00e8s avoir effectu\u00e9 un essai concluant, (voir article\u00a0pr\u00e9c\u00e9dent), je me suis lanc\u00e9 dans la lecture d&rsquo;une entr\u00e9e num\u00e9rique sur le NXT. Le principe reste le m\u00eame que pour les entr\u00e9es analogiques.<\/p>\n<p>A la fin de l&rsquo;article une petite surprise aboutit \u00e0 ce que je voulais faire avec la carte Arduino: l&rsquo;utiliser en capteur.<\/p>\n<p><!--more--><\/p>\n<p>Je vous joins les programmes Arduino et RobotC pour la lecture de l&rsquo;\u00e9tat d&rsquo;une entr\u00e9e num\u00e9rique.<\/p>\n<p><span style=\"text-decoration: underline;\">Code Arduino (version 1.0.3):<\/span><\/p>\n<pre class=\"brush: python; title: ; notranslate\" title=\"\">\r\n\r\n\/\/ A4 - SDA\r\n\/\/ A5 - SCL\r\n#include\r\nbyte read_register = 0x00;\r\nString valeur;\r\nchar buffer&#x5B;32];\r\nbyte pin8,pin9,pin10,pin11,pin12;\r\n\r\nvoid setup(){\r\n pinMode(8, INPUT);\r\n Wire.begin(0x0A); \/\/ Adresse carte Arduino\r\n Wire.onRequest(requestEvent); \/\/ Envoi data\r\n Wire.onReceive(receiveI2C); \/\/ Reception data\r\n}\r\n\r\nvoid loop(){\r\n valeur = String(digitalRead(8),DEC);\r\n valeur.toCharArray(buffer, 10);\r\n Serial.println(pin8);\r\n delay(100);\r\n}\r\n\/\/ Demande du NXT la proc\u00e9dure est lanc\u00e9e\r\nvoid receiveI2C(int bytesIn)\r\n{\r\n read_register = bytesIn;\r\n while(1 &lt; Wire.available())\r\n {\r\n read_register = Wire.read();\r\n }\r\n}\r\n\/\/ proc\u00e9dure envoie des valeurs ana A0 ou A1 au NXT pour affichage\r\nvoid requestEvent()\r\n{\r\n if(read_register == 0x01){\r\n Wire.write(buffer); \/\/ envoi de la r\u00e9ponse au NXT pour affichage\r\n }\r\n}\r\n\r\n<\/pre>\n<p><span style=\"text-decoration: underline;\">Code RobotC:<\/span><\/p>\n<pre class=\"brush: python; title: ; notranslate\" title=\"\">\r\n\r\n#pragma config(Sensor, S1,TIR,sensorI2CCustom)\r\n\r\n#define ARDUINO_ADDRESS 0x14 \/\/ adresse carte Arduino\r\n#define ARDUINO_PORT S1\r\n\r\nubyte I2Cmessage&#x5B;22];\r\nchar I2Creply&#x5B;20];\r\nstring str1;\r\nstring str2;\r\nstring str3;\r\nstring strtotal;\r\nint valeur = 0;\r\nvoid i2c_read_registers_text(ubyte register_2_read, int message_size, int return_size){\r\n memset(I2Creply, 0, sizeof(I2Creply));\r\n message_size = message_size+3;\r\n\r\nI2Cmessage&#x5B;0] = message_size;\r\n I2Cmessage&#x5B;1] = ARDUINO_ADDRESS;\r\n I2Cmessage&#x5B;2] = register_2_read;\r\n sendI2CMsg(S1, &amp;I2Cmessage&#x5B;0], return_size);\r\n wait1Msec(20);\r\n\r\nreadI2CReply(ARDUINO_PORT, &amp;I2Creply&#x5B;0], return_size);\r\n\r\nint i = 0;\r\n while(true){\r\n writeDebugStream(&quot;%c&quot;, I2Creply&#x5B;i]);\r\n str1 = I2Creply&#x5B;0]; \/\/ Mise en memoire des valeurs pour affichage\r\n wait1Msec(50);\r\n i++;\r\n\r\nif(I2Creply&#x5B;i] == 0){\r\n valeur = atoi(str1); \/\/ conversion string vers int avec atoi()\r\n nxtDisplayString(2, &quot;Input 8 etat:%2u&quot;, valeur); \/\/ affichage ecran NXT\r\n break;\r\n }\r\n }\r\n writeDebugStreamLine(&quot; &quot;);\r\n}\r\n\r\ntask main()\r\n{\r\n while(true){\r\n i2c_read_registers_text(0x01, 0,1); \/\/ Demande etat input 8\r\n wait1Msec(2000);\r\n }\r\n}\r\n\r\n<\/pre>\n<p style=\"text-align: justify;\">La principale diff\u00e9rence se situe, pour le programme Arduino, \u00e0 lire l&rsquo;\u00e9tat d&rsquo;une entr\u00e9e num\u00e9rique (0 ou 1). Le code RobotC reste pratiquement identique, il ne traite qu&rsquo;un seul octet \u00e0 afficher.<\/p>\n<p style=\"text-align: justify;\">Pour aller plus loin, l&rsquo;utilisation de la carte Arduino offrant de nombreuses\u00a0possibilit\u00e9s et l&rsquo;exploration de l&rsquo;I2C que j&rsquo;ai effectu\u00e9e me permettant d\u2019utiliser\u00a0celle ci comme capteur ou actionneur, j&rsquo;ai connect\u00e9 \u00e0 l&rsquo;Arduino un capteur de temp\u00e9rature DS18S20. Maintenant\u00a0le NXT est capable de relever la temp\u00e9rature et dans cet exemple, l&rsquo;Arduino est\u00a0utilis\u00e9\u00a0comme capteur.<\/p>\n<p><span style=\"text-decoration: underline;\">Sch\u00e9ma:<\/span><\/p>\n<p><a href=\"http:\/\/ubik75.com\/wp-content\/uploads\/2013\/05\/cablageDS18S20.jpg\" rel=\"lightbox\"><img loading=\"lazy\" decoding=\"async\" data-attachment-id=\"1105\" data-permalink=\"https:\/\/ubik75.com\/?attachment_id=1105\" data-orig-file=\"https:\/\/ubik75.com\/wp-content\/uploads\/2013\/05\/cablageDS18S20.jpg\" data-orig-size=\"814,422\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;ubik&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1367927553&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;}\" data-image-title=\"cablageDS18S20\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/ubik75.com\/wp-content\/uploads\/2013\/05\/cablageDS18S20.jpg\" class=\"aligncenter size-medium wp-image-1105\" title=\"cablageDS18S20\" src=\"http:\/\/ubik75.com\/wp-content\/uploads\/2013\/05\/cablageDS18S20-300x155.jpg\" alt=\"\" width=\"300\" height=\"155\" srcset=\"https:\/\/ubik75.com\/wp-content\/uploads\/2013\/05\/cablageDS18S20-300x155.jpg 300w, https:\/\/ubik75.com\/wp-content\/uploads\/2013\/05\/cablageDS18S20-500x259.jpg 500w, https:\/\/ubik75.com\/wp-content\/uploads\/2013\/05\/cablageDS18S20.jpg 814w\" sizes=\"auto, (max-width: 300px) 85vw, 300px\" \/><\/a><\/p>\n<p><span style=\"text-decoration: underline;\">Code Arduino (version 1.0.3):<\/span><\/p>\n<pre class=\"brush: python; title: ; notranslate\" title=\"\">\r\n\r\n\/\/ A4 - SDA\r\n\/\/ A5 - SCL\r\n#include &lt;Wire.h&gt;\r\n#include &lt;OneWire.h&gt;\r\n#include &lt;DallasTemperature.h&gt;\r\n#define ONE_WIRE_BUS 9 \/\/ 1-wire sur borne 9\r\nOneWire oneWire(ONE_WIRE_BUS);\r\nDallasTemperature sensors(&amp;oneWire);\r\n\/\/ adresses des capteurs de temperatures DS18S20\r\nDeviceAddress Temp3 = { 0x10, 0xD2, 0xAD, 0x71, 0x01, 0x08, 0x00, 0x74 };\r\n\r\nbyte read_register = 0x00;\r\nString valeur,valeur1;\r\nchar buffer&#x5B;32], buffer1&#x5B;32];\r\nfloat temp3;\r\nlong milliref1;\r\nint tempmod;\r\n\r\nvoid setup()\r\n{\r\n Wire.begin(0x0A); \/\/ Adresse carte Arduino\r\n Wire.onRequest(requestEvent); \/\/ Envoi data\r\n Wire.onReceive(receiveI2C); \/\/ Reception data\r\n Serial.begin(9600);\r\n sensors.begin(); \/\/ activation capteur de temp\u00e9rature\r\n sensors.setResolution(Temp3, 10);\r\n delay(1000);\r\n}\r\n\r\nvoid loop()\r\n{\r\n sensors.requestTemperatures(); \/\/ demande de mesure temp\u00e9rature\r\n temp3 = sensors.getTempC(Temp3); \/\/ r\u00e9cup\u00e9ration de la temp\u00e9rature\r\n temp3 = temp3 * 100;\r\n tempmod = (int) temp3; \/\/ valeur modifi\u00e9e pour transfert\r\n valeur = String(tempmod,DEC); \/\/ conversion int en string\r\n valeur.toCharArray(buffer, 10); \/\/ conversion string en char\r\n delay(5000);\r\n}\r\n\r\n\/\/ Demande du NXT la proc\u00e9dure est lanc\u00e9e\r\nvoid receiveI2C(int bytesIn)\r\n{\r\n read_register = bytesIn;\r\n while(1 &lt; Wire.available()){\r\n read_register = Wire.read();\r\n }\r\n}\r\n\/\/ proc\u00e9dure envoie de la temp\u00e9rature pour affichage sur le NXT\r\nvoid requestEvent()\r\n{\r\n if(read_register == 0x01){\r\n Wire.write(buffer); \/\/ envoi de la r\u00e9ponse au NXT pour affichage\r\n }\r\n}\r\n\r\n<\/pre>\n<p><span style=\"text-decoration: underline;\">Code RobotC:<\/span><\/p>\n<pre class=\"brush: css; title: ; notranslate\" title=\"\">\r\n\r\n#pragma config(Sensor, S1,TIR,sensorI2CCustom)\r\n#define ARDUINO_ADDRESS 0x14 \/\/ adresse carte Arduino\r\n#define ARDUINO_PORT S1\r\n\r\nubyte I2Cmessage&#x5B;22];\r\nchar I2Creply&#x5B;20];\r\nstring str1;\r\nstring str2;\r\nstring str3;\r\nstring str4;\r\nstring strtotal;\r\nint valeur = 0;\r\nfloat temp;\r\nvoid i2c_read_registers_text(ubyte register_2_read, int message_size, int return_size){\r\n memset(I2Creply, 0, sizeof(I2Creply));\r\n message_size = message_size+3;\r\n\r\nI2Cmessage&#x5B;0] = message_size;\r\n I2Cmessage&#x5B;1] = ARDUINO_ADDRESS;\r\n I2Cmessage&#x5B;2] = register_2_read;\r\n sendI2CMsg(S1, &amp;I2Cmessage&#x5B;0], return_size);\r\n wait1Msec(20);\r\n\r\nreadI2CReply(ARDUINO_PORT, &amp;I2Creply&#x5B;0], return_size);\r\n\r\nint i = 0;\r\n while(true){\r\n writeDebugStream(&quot;%c&quot;, I2Creply&#x5B;i]);\r\n str1 = I2Creply&#x5B;0]; \/\/ Mise en memoire des valeurs pour affichage\r\n str2 = I2Creply&#x5B;1]; \/\/ Mise en memoire des valeurs pour affichage\r\n str3 = I2Creply&#x5B;2]; \/\/ Mise en memoire des valeurs pour affichage\r\n str4 = I2Creply&#x5B;3]; \/\/ Mise en memoire des valeurs pour affichage\r\n wait1Msec(50);\r\n i++;\r\n\r\nif(I2Creply&#x5B;i] == 0){\r\n\r\nstrtotal = str1 + str2; \/\/ Mise en forme pour affichage\r\n strtotal = strtotal + str3; \/\/ Mise en forme pour affichage\r\n strtotal = strtotal + str4; \/\/ Mise en forme pour affichage\r\n valeur = atoi(strtotal); \/\/ conversion string vers int avec atoi()\r\n \/\/ Convertion int en float fonctionne pour 99C &gt; temperature &gt; 10C\r\n temp = valeur;\r\n temp = temp \/ 100; \/\/ conversion pour faire apparaitre temperature avec 2 chiffres apres virgules\r\n nxtDisplayCenteredBigTextLine(3, &quot;T:%2.2f&quot;, temp); \/\/ affichage ecran NXT\r\n break;\r\n }\r\n }\r\n writeDebugStreamLine(&quot; &quot;);\r\n}\r\n\r\ntask main()\r\n{\r\n while(true){\r\n i2c_read_registers_text(0x01, 0,4); \/\/ Demande valeur temperature 4 octets\r\n wait1Msec(30000);\r\n }\r\n}\r\n\r\n<\/pre>\n<p style=\"text-align: justify;\">Le code RobotC fonctionne pour une temp\u00e9rature comprise entre 10\u00b0C et 99\u00b0C. Au del\u00e0, il y a des probl\u00e8mes de mise en forme de la temp\u00e9rature pour affichage sur le NXT. Je ne l&rsquo;ai pas fait, car je voulais juste voir si ce que je voulais faire avec une carte Arduino et le NXT fonctionnait.<\/p>\n<div class=\"jetpack-video-wrapper\"><span class=\"embed-youtube\" style=\"text-align:center; display: block;\"><iframe loading=\"lazy\" class=\"youtube-player\" width=\"840\" height=\"473\" src=\"https:\/\/www.youtube.com\/embed\/G9GGWCbVShQ?version=3&#038;rel=1&#038;showsearch=0&#038;showinfo=1&#038;iv_load_policy=1&#038;fs=1&#038;hl=fr-FR&#038;autohide=2&#038;wmode=transparent\" allowfullscreen=\"true\" style=\"border:0;\" sandbox=\"allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox\"><\/iframe><\/span><\/div>\n<p style=\"text-align: justify;\">En\u00a0conclusion, la carte Arduino peut apporter un plus au NXT de par sa facilit\u00e9 de mise en place (utilisation du bus I2C) et de par la multitudes de montages que l&rsquo;on peut faire avec cette carte.<\/p>\n","protected":false},"excerpt":{"rendered":"<img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"http:\/\/ubik75.com\/wp-content\/plugins\/thumbnail-for-excerpts\/tfe_no_thumb.png\" class=\"alignleft wp-post-image tfe\" alt=\"\" title=\"\" \/><p>Apr\u00e8s avoir effectu\u00e9 un essai concluant, (voir article\u00a0pr\u00e9c\u00e9dent), je me suis lanc\u00e9 dans la lecture d&rsquo;une entr\u00e9e num\u00e9rique sur le NXT. Le principe reste le m\u00eame que pour les entr\u00e9es analogiques. A la fin de l&rsquo;article une petite surprise aboutit \u00e0 ce que je voulais faire avec la carte Arduino: l&rsquo;utiliser en capteur.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[3,7,9],"tags":[54,109,131],"class_list":["post-1091","post","type-post","status-publish","format-standard","hentry","category-arduino","category-materiel","category-nxt","tag-arduino-2","tag-i2c","tag-nxt"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Apr\u00e8s avoir effectu\u00e9 un essai concluant, (voir article pr\u00e9c\u00e9dent), je me suis lanc\u00e9 dans la lecture d&#039;une entr\u00e9e num\u00e9rique sur le NXT. Le principe reste le m\u00eame que pour les entr\u00e9es analogiques. A la fin de l&#039;article une petite surprise aboutit \u00e0 ce que je voulais faire avec la carte Arduino: l&#039;utiliser en capteur. 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A la fin de l&#039;article une petite surprise aboutit \u00e0 ce que je voulais faire avec la carte Arduino: l&#039;utiliser en capteur. Je vous\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/ubik75.com\/?p=1091\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2013-05-07T16:59:21+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2019-03-24T09:15:35+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Bus I2C, liaison NXT carte Arduino, partie 2.\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Apr\u00e8s avoir effectu\u00e9 un essai concluant, (voir article pr\u00e9c\u00e9dent), je me suis lanc\u00e9 dans la lecture d&#039;une entr\u00e9e num\u00e9rique sur le NXT. Le principe reste le m\u00eame que pour les entr\u00e9es analogiques. A la fin de l&#039;article une petite surprise aboutit \u00e0 ce que je voulais faire avec la carte Arduino: l&#039;utiliser en capteur. 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Je vous","og:url":"https:\/\/ubik75.com\/?p=1091","article:published_time":"2013-05-07T16:59:21+00:00","article:modified_time":"2019-03-24T09:15:35+00:00","twitter:card":"summary","twitter:title":"Bus I2C, liaison NXT carte Arduino, partie 2.","twitter:description":"Apr\u00e8s avoir effectu\u00e9 un essai concluant, (voir article pr\u00e9c\u00e9dent), je me suis lanc\u00e9 dans la lecture d'une entr\u00e9e num\u00e9rique sur le NXT. Le principe reste le m\u00eame que pour les entr\u00e9es analogiques. A la fin de l'article une petite surprise aboutit \u00e0 ce que je voulais faire avec la carte Arduino: l'utiliser en capteur. 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