{"id":110,"date":"2014-09-03T19:33:48","date_gmt":"2014-09-03T18:33:48","guid":{"rendered":"http:\/\/www.jelectronique.com\/?p=110"},"modified":"2014-09-03T19:33:48","modified_gmt":"2014-09-03T18:33:48","slug":"tuto-xmega-asf-timer-en-mode-pwm","status":"publish","type":"post","link":"https:\/\/www.jelectronique.com\/?p=110","title":{"rendered":"TUTO XMEGA (ASF) : Timer en mode PWM"},"content":{"rendered":"

Un petit exemple rapide sur l’utilisation d’un timer en mode PWM pour faire varier la luminosit\u00e9 d’une LED :<\/p>\n

\n
#include <asf.h><\/span>\r\n\u00a0\r\n#define LED_VERTE IOPORT_CREATE_PIN(PORTD, 5) \/\/LED<\/span>\r\n\u00a0\r\n#define Periode 1075\t<\/span>\r\n\u00a0\r\nint<\/span> main (<\/span>void<\/span>)<\/span>\r\n{<\/span>\r\n\t\/\/Initialisation du controleur d'interruptions<\/span>\r\n\tpmic_init(<\/span>)<\/span>;<\/span>\t\r\n\t\/\/Initialisation de l'horloge\t<\/span>\r\n\tsysclk_init(<\/span>)<\/span>;<\/span>\t\t\r\n\u00a0\r\n\t\/\/Initialisation des entr\u00e9es\/sorties<\/span>\r\n\tioport_set_pin_dir(<\/span>LED_VERTE,<\/span> IOPORT_DIR_OUTPUT)<\/span>;<\/span>\r\n\u00a0\r\n\t\/\/Initialisation du Timer 1<\/span>\r\n\ttc_enable(<\/span>&<\/span>TCD1)<\/span>;<\/span>\t\r\n\ttc_set_wgm(<\/span>&<\/span>TCD1,<\/span> TC_WGMODE_SINGLESLOPE_gc)<\/span>;<\/span>\t\/\/Choix du mode du timer1 et du mode PWM<\/span>\r\n\ttc_write_period(<\/span>&<\/span>TCD1,<\/span> Periode)<\/span>;<\/span>\t\t\/\/D\u00e9finition de la p\u00e9riode du PWM<\/span>\r\n\ttc_write_cc(<\/span>&<\/span>TCD1,<\/span> TC_CCB,<\/span> Periode\/<\/span>100<\/span>)<\/span>;<\/span>\t\/\/Allume la LED \u00e0 1% de la luminosit\u00e9<\/span>\r\n\ttc_enable_cc_channels(<\/span>&<\/span>TCD1,<\/span>TC_CCBEN)<\/span>;<\/span>\t\t\/\/Active la sortie CCB du Timer 1 - Donc PD5<\/span>\r\n\tcpu_irq_enable(<\/span>)<\/span>;<\/span>\t\t\t\t\/\/Activation de l'interruption globale\t\t\t\t\t<\/span>\r\n\ttc_write_clock_source(<\/span>&<\/span>TCD1,<\/span> TC_CLKSEL_DIV8_gc)<\/span>;<\/span>\/\/Activation de l'horloge du timer 1 fclksys\/8<\/span>\r\n\u00a0\r\n\tboard_init(<\/span>)<\/span>;<\/span>\r\n\u00a0\r\n\twhile<\/span>(<\/span>1<\/span>)<\/span>\r\n\t{<\/span>\r\n\t\t\/\/Augemente progressivement la luminosit\u00e9<\/span>\r\n\t\tfor<\/span>(<\/span>int<\/span> i=<\/span>1<\/span>;<\/span>i<=<\/span>100<\/span>;<\/span>i++<\/span>)<\/span>\r\n\t\t{<\/span>\r\n\t\t\ttc_write_cc(<\/span>&<\/span>TCD1,<\/span> TC_CCB,<\/span> Periode\/<\/span>100<\/span>*<\/span>i)<\/span>;<\/span>\r\n\t\t\tdelay_ms(<\/span>10<\/span>)<\/span>;<\/span>\t\t\t\r\n\t\t}<\/span>\r\n\u00a0\r\n\t\t\/\/Diminue progressivement la luminosit\u00e9<\/span>\r\n\t\tfor<\/span>(<\/span>int<\/span> i=<\/span>100<\/span>;<\/span>i>=<\/span>1<\/span>;<\/span>i--<\/span>)<\/span>\r\n\t\t{<\/span>\r\n\t\t\ttc_write_cc(<\/span>&<\/span>TCD1,<\/span> TC_CCB,<\/span> Periode\/<\/span>100<\/span>*<\/span>i)<\/span>;<\/span>\r\n\t\t\tdelay_ms(<\/span>10<\/span>)<\/span>;<\/span>\t\t\t\r\n\t\t}<\/span>\r\n\u00a0\r\n\t}<\/span>\r\n}<\/span><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
Un petit exemple rapide sur l’utilisation d’un timer en mode PWM pour faire varier la luminosit\u00e9 d’une LED : #include <asf.h> \u00a0 #define LED_VERTE IOPORT_CREATE_PIN(PORTD, 5) \/\/LED \u00a0 #define Periode 1075 \u00a0 int main (void) { \/\/Initialisation du controleur d’interruptions… Continuer la lecture →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":26,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-110","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-electronique"],"_links":{"self":[{"href":"https:\/\/www.jelectronique.com\/index.php?rest_route=\/wp\/v2\/posts\/110","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jelectronique.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.jelectronique.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.jelectronique.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jelectronique.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=110"}],"version-history":[{"count":2,"href":"https:\/\/www.jelectronique.com\/index.php?rest_route=\/wp\/v2\/posts\/110\/revisions"}],"predecessor-version":[{"id":115,"href":"https:\/\/www.jelectronique.com\/index.php?rest_route=\/wp\/v2\/posts\/110\/revisions\/115"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jelectronique.com\/index.php?rest_route=\/wp\/v2\/media\/26"}],"wp:attachment":[{"href":"https:\/\/www.jelectronique.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=110"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jelectronique.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=110"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jelectronique.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=110"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}