{"id":664,"date":"2025-09-15T22:49:58","date_gmt":"2025-09-15T13:49:58","guid":{"rendered":"https:\/\/microelectronica.jp\/wiki\/?p=664"},"modified":"2025-09-15T23:15:19","modified_gmt":"2025-09-15T14:15:19","slug":"lovyangfx%e3%82%92%e4%bd%bf%e3%81%a3%e3%81%a6tf%e3%82%ab%e3%83%bc%e3%83%89%e5%86%85%e3%81%aejpeg%e7%94%bb%e5%83%8f%e3%82%92%e8%a1%a8%e7%a4%ba%e3%81%99%e3%82%8b","status":"publish","type":"post","link":"https:\/\/microelectronica.jp\/wiki\/?p=664","title":{"rendered":"LovyanGFX\u3092\u4f7f\u3063\u3066TF\u30ab\u30fc\u30c9\u5185\u306eJPEG\u753b\u50cf\u3092\u8868\u793a\u3059\u308b"},"content":{"rendered":"

LovyanGFX\u3092\u4f7f\u3063\u3066TF\u30ab\u30fc\u30c9\u5185\u306eJPEG\u753b\u50cf\u3092\u8868\u793a\u3059\u308b\u30b5\u30f3\u30d7\u30eb\u3067\u3059\u3002<\/p>\n

<\/p>\n

LovyanGFX\u306f\u3001ESP32\u3084Arduino\u74b0\u5883\u3067\u4f7f\u3048\u308b\u9ad8\u6a5f\u80fd\u30fb\u9ad8\u901f\u306a\u30b0\u30e9\u30d5\u30a3\u30c3\u30af\u30e9\u30a4\u30d6\u30e9\u30ea<\/strong>\u3067\u3059\u3002\u65e5\u672c\u306e\u958b\u767a\u8005\u306b\u3088\u3063\u3066\u958b\u767a\u3055\u308c\u3001AdafruitGFX\u3084TFT_eSPI\u3068\u4e92\u63db\u6027\u3092\u6301\u3061\u3064\u3064\u3001\u3088\u308a\u67d4\u8edf\u3067\u5f37\u529b\u306a\u63cf\u753b\u6a5f\u80fd<\/strong>\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

TF\u30ab\u30fc\u30c9\u306b\u753b\u50cf\u3092\u4fdd\u5b58\u3059\u308b<\/h3>\n

TF\u30ab\u30fc\u30c9\u306b480\u00d7320\u30d4\u30af\u30bb\u30eb\u306eJPEG\u753b\u50cf\u30c7\u30fc\u30bf\u3092\u30eb\u30fc\u30c8\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u4fdd\u5b58\u3057\u307e\u3059\u3002<\/p>\n

TF\u30ab\u30fc\u30c9\u306f\u5fc5\u305aFAT32\u3067\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3057\u307e\u3059\u3002exFat\u3084NTFS\u306f\u4f7f\u3048\u307e\u305b\u3093\u3002\u30b5\u30a4\u30ba\u306f\uff5e2GB\u7a0b\u5ea6\u306e\u5c0f\u3055\u3044\u30b5\u30a4\u30ba\u306e\u3082\u306e\u306e\u307b\u3046\u304c\u554f\u984c\u304c\u5c11\u306a\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u3053\u3053\u3067\u306f\u4f8b\u3068\u3057\u3066\u3001 img1.jpg\u3000img2.jpg\u3000img3.jpg\u30003\u679a\u306e\u753b\u50cf\u3092\u4fdd\u5b58\u3057\u305f\u3068\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\"\"<\/td>\n\"\"<\/td>\n\"\"<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u203b\u753b\u50cf\u30c7\u30fc\u30bf\u306f\u30c7\u30fc\u30bf\u30b5\u30a4\u30ba\u304c\u5927\u304d\u3044\u3068\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002\u307e\u305f\u89e3\u50cf\u5ea6\u306f\u5fc5\u305a480\u00d7320\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n

\u30b3\u30fc\u30c9\u306e\u8a18\u8ff0<\/h3>\n

TF\u30ab\u30fc\u30c9\u304b\u3089img1.jpg, img2.jpg, img3.jpg\u3092\u8aad\u307f\u8fbc\u3093\u30673\u79d2\u9593\u9694\u3067\u8868\u793a\u3059\u308b\u30d7\u30ed\u30b0\u30e9\u30e0\u4f8b\u3067\u3059\u3002<\/p>\n

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#define LGFX_USE_V1\r\n#include <Arduino.h>\r\n#include <LovyanGFX.hpp>\r\n#include <SD.h>\r\n#include <SPI.h>\r\n\r\n\/\/ ------------- \u30d1\u30cd\u30eb\u5b9a\u7fa9 -------------------\r\nclass LGFX_ESP32_3248S035 : public lgfx::LGFX_Device {\r\n\u00a0 lgfx::Panel_ST7796 \u00a0_panel;\r\n\u00a0 lgfx::Bus_SPI \u00a0 \u00a0 \u00a0 _bus;\r\n\u00a0 lgfx::Light_PWM \u00a0 \u00a0 _light;\r\n\r\npublic:\r\n\u00a0 LGFX_ESP32_3248S035(void) {\r\n\u00a0 \u00a0 { \/\/ TFT\u7528 SPI\uff08VSPI\uff09\r\n\u00a0 \u00a0 \u00a0 auto cfg = _bus.config();\r\n\u00a0 \u00a0 \u00a0 cfg.spi_host \u00a0 \u00a0= VSPI_HOST;\r\n\u00a0 \u00a0 \u00a0 cfg.spi_mode \u00a0 \u00a0= 0;\r\n\u00a0 \u00a0 \u00a0 cfg.freq_write \u00a0= 40000000;\r\n\u00a0 \u00a0 \u00a0 cfg.freq_read \u00a0 = 16000000;\r\n\u00a0 \u00a0 \u00a0 cfg.spi_3wire \u00a0 = true;\r\n\u00a0 \u00a0 \u00a0 cfg.use_lock \u00a0 \u00a0= true;\r\n\u00a0 \u00a0 \u00a0 cfg.dma_channel = 1;\r\n\r\n\u00a0 \u00a0 \u00a0 cfg.pin_sclk = 14; \u00a0\/\/ TFT SCLK\r\n\u00a0 \u00a0 \u00a0 cfg.pin_mosi = 13; \u00a0\/\/ TFT MOSI\r\n\u00a0 \u00a0 \u00a0 cfg.pin_miso = 12; \u00a0\/\/ TFT MISO\r\n\u00a0 \u00a0 \u00a0 cfg.pin_dc \u00a0 = 2; \u00a0 \/\/ TFT DC\r\n\u00a0 \u00a0 \u00a0 _bus.config(cfg);\r\n\u00a0 \u00a0 \u00a0 _panel.setBus(&_bus);\r\n\u00a0 \u00a0 }\r\n\u00a0 \u00a0 { \/\/ \u30d1\u30cd\u30eb\u8a2d\u5b9a\r\n\u00a0 \u00a0 \u00a0 auto cfg = _panel.config();\r\n\u00a0 \u00a0 \u00a0 cfg.pin_cs \u00a0 = 15;\r\n\u00a0 \u00a0 \u00a0 cfg.pin_rst \u00a0= -1;\r\n\u00a0 \u00a0 \u00a0 cfg.pin_busy = -1;\r\n\r\n\u00a0 \u00a0 \u00a0 cfg.panel_width \u00a0 = 320;\r\n\u00a0 \u00a0 \u00a0 cfg.panel_height \u00a0= 480;\r\n\u00a0 \u00a0 \u00a0 cfg.memory_width \u00a0= 320;\r\n\u00a0 \u00a0 \u00a0 cfg.memory_height = 480;\r\n\r\n\u00a0 \u00a0 \u00a0 cfg.offset_x = 0; cfg.offset_y = 0; cfg.offset_rotation = 0;\r\n\u00a0 \u00a0 \u00a0 cfg.readable \u00a0 = true;\r\n\u00a0 \u00a0 \u00a0 cfg.invert \u00a0 \u00a0 = false;\r\n\u00a0 \u00a0 \u00a0 cfg.rgb_order \u00a0= false;\r\n\u00a0 \u00a0 \u00a0 cfg.dlen_16bit = false;\r\n\u00a0 \u00a0 \u00a0 cfg.bus_shared = true;\r\n\u00a0 \u00a0 \u00a0 _panel.config(cfg);\r\n\u00a0 \u00a0 }\r\n\u00a0 \u00a0 { \/\/ \u30d0\u30c3\u30af\u30e9\u30a4\u30c8 PWM\r\n\u00a0 \u00a0 \u00a0 auto lcfg = _light.config();\r\n\u00a0 \u00a0 \u00a0 lcfg.pin_bl \u00a0 \u00a0 \u00a0= 27;\r\n\u00a0 \u00a0 \u00a0 lcfg.invert \u00a0 \u00a0 \u00a0= false;\r\n\u00a0 \u00a0 \u00a0 lcfg.freq \u00a0 \u00a0 \u00a0 \u00a0= 44100;\r\n\u00a0 \u00a0 \u00a0 lcfg.pwm_channel = 7;\r\n\u00a0 \u00a0 \u00a0 _light.config(lcfg);\r\n\u00a0 \u00a0 \u00a0 _panel.setLight(&_light);\r\n\u00a0 \u00a0 }\r\n\u00a0 \u00a0 setPanel(&_panel);\r\n\u00a0 }\r\n};\r\n\r\nLGFX_ESP32_3248S035 tft;\r\n\r\n\/\/ SD\uff08VSPI \u660e\u793a\uff09\r\nSPIClass spiSD(VSPI);\r\n\r\n\/\/ ---------- \u30d7\u30ed\u30c8\u30bf\u30a4\u30d7\u5ba3\u8a00 ----------\r\nbool showJpeg(const char* path, int x = 0, int y = 0, int maxW = -1, int maxH = -1);\r\n\r\n\/\/ \u753b\u9762\u4e2d\u592e\u306b\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u51fa\u3059\u3060\u3051\uff08\u505c\u6b62\u306f\u3057\u306a\u3044\uff09--------\r\nstatic void showError(const String& msg) {\r\n\u00a0 tft.fillScreen(TFT_BLACK);\r\n\u00a0 tft.setTextDatum(MC_DATUM);\r\n\u00a0 tft.setTextColor(TFT_RED, TFT_BLACK);\r\n\u00a0 tft.setFont(&fonts::Font0);\r\n\u00a0 tft.setTextSize(2);\r\n\u00a0 tft.drawString(msg, tft.width()\/2, tft.height()\/2);\r\n}\r\n\r\n\/\/ ---------- \u30bb\u30c3\u30c8\u30a2\u30c3\u30d7 ----------\r\nvoid setup() {\r\n\u00a0 Serial.begin(115200);\r\n\u00a0 delay(100);\r\n\r\n\u00a0 \/\/ TFT \u521d\u671f\u5316\r\n\u00a0 tft.init();\r\n\u00a0 tft.setRotation(1); \u00a0 \u00a0 \u00a0 \/\/ \u6a2a\u5411\u304d\uff08480x320\uff09\r\n\u00a0 tft.setBrightness(255); \u00a0 \/\/ BL 0\u301c255\r\n\u00a0 tft.fillScreen(TFT_BLACK);\r\n\r\n\u00a0 \/\/ SD \u521d\u671f\u5316\uff08SCLK=18, MISO=19, MOSI=23, CS=5\uff09\r\n\u00a0 spiSD.begin(18, 19, 23, 5);\r\n\u00a0 if (!SD.begin(5, spiSD)) {\r\n\u00a0 \u00a0 showError(\"SD init failed (CS=5)\");\r\n\u00a0 }\r\n}\r\n\r\n\/\/ ------------------------------------------\r\n\r\nvoid loop() {\r\n\r\n\u00a0 const char* files[] = { \"\/img1.jpg\", \"\/img2.jpg\", \"\/img3.jpg\" };\r\n\u00a0 static int idx = 0;\r\n\r\n\u00a0 tft.fillScreen(TFT_BLACK);\r\n\u00a0\r\n\u00a0 bool ok = showJpeg(files[idx], 0, 0, tft.width(), tft.height());\r\n\u00a0\r\n\u00a0 if (!ok) {\r\n\u00a0 \u00a0 showError(String(\"showJpeg failed:\\n\"));\r\n\u00a0 }\r\n\r\n\u00a0 idx = (idx + 1) % (sizeof(files)\/sizeof(files[0]));\r\n\r\n\u00a0 delay(3000);\r\n}\r\n\r\n\/\/ ---------- JPEG\u8868\u793a\u95a2\u6570\uff08SD\u2192\u30e1\u30e2\u30ea\u2192drawJpg \u306e\u9806\u3067\u8868\u793a\uff09----------\r\n\r\nbool showJpeg(const char* path, int x, int y, int maxW, int maxH) {\r\n\u00a0 if (!path || path[0] == '\\0') return false;\r\n\u00a0 if (!SD.begin(5, spiSD)) return false;\r\n\u00a0 if (!SD.exists(path)) return false;\r\n\r\n\u00a0 File f = SD.open(path, FILE_READ);\r\n\u00a0 if (!f) return false;\r\n\r\n\u00a0 size_t len = f.size();\r\n\u00a0 if (len == 0) { f.close(); return false; }\r\n\r\n\u00a0 \/\/ \u30d0\u30c3\u30d5\u30a1\u78ba\u4fdd\r\n\u00a0 uint8_t* buf = (uint8_t*)malloc(len);\r\n\u00a0 if (!buf) { f.close(); return false; }\r\n\r\n\u00a0 size_t read_total = 0;\r\n\u00a0 while (read_total < len) {\r\n\u00a0 \u00a0 int n = f.read(buf + read_total, len - read_total);\r\n\u00a0 \u00a0 if (n <= 0) break;\r\n\u00a0 \u00a0 read_total += n;\r\n\u00a0 }\r\n\u00a0 f.close();\r\n\u00a0 if (read_total != len) { free(buf); return false; }\r\n\r\n\u00a0 \/\/ maxW\/maxH \u672a\u6307\u5b9a\u306a\u3089\u753b\u9762\u30b5\u30a4\u30ba\u3092\u4f7f\u3046\r\n\u00a0 if (maxW <= 0) maxW = tft.width();\r\n\u00a0 if (maxH <= 0) maxH = tft.height();\r\n\r\n\u00a0 \/\/ JPEG\u63cf\u753b\uff08LovyanGFX\u306e\u30e1\u30e2\u30ea\u5165\u529bAPI\uff09\r\n\u00a0 bool ok = tft.drawJpg(buf, len, x, y, maxW, maxH);\r\n\u00a0 free(buf);\r\n\u00a0 return ok;\r\n}<\/code><\/pre>\n<\/div>\n<\/div>\n<\/div>\n
<\/div>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
LovyanGFX\u3092\u4f7f\u3063\u3066TF\u30ab\u30fc\u30c9\u5185\u306eJPEG\u753b\u50cf\u3092\u8868\u793a\u3059\u308b\u30b5\u30f3\u30d7\u30eb\u3067\u3059\u3002 LovyanGFX\u306f\u3001ESP32\u3084Arduino\u74b0\u5883\u3067\u4f7f\u3048\u308b\u9ad8\u6a5f\u80fd\u30fb\u9ad8\u901f\u306a\u30b0\u30e9\u30d5\u30a3\u30c3\u30af\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3059\u3002\u65e5\u672c\u306e\u958b\u767a\u8005\u306b\u3088\u3063\u3066\u958b\u767a\u3055\u308c\u3001Adafr […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"image","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[22],"tags":[],"class_list":["post-664","post","type-post","status-publish","format-image","hentry","category-cyb-esp32-3248s35","post_format-post-format-image"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/microelectronica.jp\/wiki\/index.php?rest_route=\/wp\/v2\/posts\/664","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/microelectronica.jp\/wiki\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/microelectronica.jp\/wiki\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/microelectronica.jp\/wiki\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/microelectronica.jp\/wiki\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=664"}],"version-history":[{"count":8,"href":"https:\/\/microelectronica.jp\/wiki\/index.php?rest_route=\/wp\/v2\/posts\/664\/revisions"}],"predecessor-version":[{"id":668,"href":"https:\/\/microelectronica.jp\/wiki\/index.php?rest_route=\/wp\/v2\/posts\/664\/revisions\/668"}],"wp:attachment":[{"href":"https:\/\/microelectronica.jp\/wiki\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=664"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/microelectronica.jp\/wiki\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=664"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/microelectronica.jp\/wiki\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=664"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}