diff --git a/Marlin/Configuration_adv.h b/Marlin/Configuration_adv.h
index 39f531fffa1f22fda8e46e1d7e329eb0cd9c3eb6..2538128d3b16f390d327e4e24f490c91dec9ce05 100644
--- a/Marlin/Configuration_adv.h
+++ b/Marlin/Configuration_adv.h
@@ -460,15 +460,19 @@
#endif // SDSUPPORT
-// for dogm lcd displays you can choose some additional fonts:
+// Some additional options are available for graphical displays:
#if ENABLED(DOGLCD)
- // save 3120 bytes of PROGMEM by commenting out #define USE_BIG_EDIT_FONT
- // we don't have a big font for Cyrillic, Kana
+ // A bigger font is available for edit items. Costs 3120 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_BIG_EDIT_FONT
- // If you have spare 2300Byte of progmem and want to use a
- // smaller font on the Info-screen uncomment the next line.
+ // A smaller font may be used on the Info Screen. Costs 2300 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_SMALL_INFOFONT
+
+ // Enable this option and reduce the value to optimize screen updates.
+ // The normal delay is 10µs. Use the lowest value that still gives a reliable display.
+ //#define DOGM_SPI_DELAY_US 5
#endif // DOGLCD
// @section safety
diff --git a/Marlin/example_configurations/Cartesio/Configuration_adv.h b/Marlin/example_configurations/Cartesio/Configuration_adv.h
index 6b46093f014fb2ca5aaeecebb06606d27e28aea6..5aede9304a8922e6643cb7c53af6885ae8e9066b 100644
--- a/Marlin/example_configurations/Cartesio/Configuration_adv.h
+++ b/Marlin/example_configurations/Cartesio/Configuration_adv.h
@@ -460,15 +460,19 @@
#endif // SDSUPPORT
-// for dogm lcd displays you can choose some additional fonts:
+// Some additional options are available for graphical displays:
#if ENABLED(DOGLCD)
- // save 3120 bytes of PROGMEM by commenting out #define USE_BIG_EDIT_FONT
- // we don't have a big font for Cyrillic, Kana
+ // A bigger font is available for edit items. Costs 3120 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_BIG_EDIT_FONT
- // If you have spare 2300Byte of progmem and want to use a
- // smaller font on the Info-screen uncomment the next line.
+ // A smaller font may be used on the Info Screen. Costs 2300 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_SMALL_INFOFONT
+
+ // Enable this option and reduce the value to optimize screen updates.
+ // The normal delay is 10µs. Use the lowest value that still gives a reliable display.
+ //#define DOGM_SPI_DELAY_US 5
#endif // DOGLCD
// @section safety
diff --git a/Marlin/example_configurations/Felix/Configuration_adv.h b/Marlin/example_configurations/Felix/Configuration_adv.h
index ddd143d6f49f74930af16b4e6502e625741ea3a9..90076a1fff8192109a322713b9e48741b0244629 100644
--- a/Marlin/example_configurations/Felix/Configuration_adv.h
+++ b/Marlin/example_configurations/Felix/Configuration_adv.h
@@ -460,15 +460,19 @@
#endif // SDSUPPORT
-// for dogm lcd displays you can choose some additional fonts:
+// Some additional options are available for graphical displays:
#if ENABLED(DOGLCD)
- // save 3120 bytes of PROGMEM by commenting out #define USE_BIG_EDIT_FONT
- // we don't have a big font for Cyrillic, Kana
+ // A bigger font is available for edit items. Costs 3120 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_BIG_EDIT_FONT
- // If you have spare 2300Byte of progmem and want to use a
- // smaller font on the Info-screen uncomment the next line.
+ // A smaller font may be used on the Info Screen. Costs 2300 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_SMALL_INFOFONT
+
+ // Enable this option and reduce the value to optimize screen updates.
+ // The normal delay is 10µs. Use the lowest value that still gives a reliable display.
+ //#define DOGM_SPI_DELAY_US 5
#endif // DOGLCD
// @section safety
diff --git a/Marlin/example_configurations/Hephestos/Configuration_adv.h b/Marlin/example_configurations/Hephestos/Configuration_adv.h
index c0a7ea3e3fcd2fb15cb3befd0b892d782b8548ae..79c5ab87f383230252ce127baecf361d35921538 100644
--- a/Marlin/example_configurations/Hephestos/Configuration_adv.h
+++ b/Marlin/example_configurations/Hephestos/Configuration_adv.h
@@ -460,15 +460,19 @@
#endif // SDSUPPORT
-// for dogm lcd displays you can choose some additional fonts:
+// Some additional options are available for graphical displays:
#if ENABLED(DOGLCD)
- // save 3120 bytes of PROGMEM by commenting out #define USE_BIG_EDIT_FONT
- // we don't have a big font for Cyrillic, Kana
+ // A bigger font is available for edit items. Costs 3120 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_BIG_EDIT_FONT
- // If you have spare 2300Byte of progmem and want to use a
- // smaller font on the Info-screen uncomment the next line.
+ // A smaller font may be used on the Info Screen. Costs 2300 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_SMALL_INFOFONT
+
+ // Enable this option and reduce the value to optimize screen updates.
+ // The normal delay is 10µs. Use the lowest value that still gives a reliable display.
+ //#define DOGM_SPI_DELAY_US 5
#endif // DOGLCD
// @section safety
diff --git a/Marlin/example_configurations/Hephestos_2/Configuration_adv.h b/Marlin/example_configurations/Hephestos_2/Configuration_adv.h
index 165dc5562336cd565f20216655adda622ba228b6..ee2c63fcbb7f61711df04f19ec971411b3afe582 100644
--- a/Marlin/example_configurations/Hephestos_2/Configuration_adv.h
+++ b/Marlin/example_configurations/Hephestos_2/Configuration_adv.h
@@ -460,15 +460,19 @@
#endif // SDSUPPORT
-// for dogm lcd displays you can choose some additional fonts:
+// Some additional options are available for graphical displays:
#if ENABLED(DOGLCD)
- // save 3120 bytes of PROGMEM by commenting out #define USE_BIG_EDIT_FONT
- // we don't have a big font for Cyrillic, Kana
+ // A bigger font is available for edit items. Costs 3120 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_BIG_EDIT_FONT
- // If you have spare 2300Byte of progmem and want to use a
- // smaller font on the Info-screen uncomment the next line.
+ // A smaller font may be used on the Info Screen. Costs 2300 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
#define USE_SMALL_INFOFONT
+
+ // Enable this option and reduce the value to optimize screen updates.
+ // The normal delay is 10µs. Use the lowest value that still gives a reliable display.
+ //#define DOGM_SPI_DELAY_US 5
#endif // DOGLCD
// @section safety
diff --git a/Marlin/example_configurations/K8200/Configuration_adv.h b/Marlin/example_configurations/K8200/Configuration_adv.h
index a73020fb36324588985881cbff80dec6f625f27b..0cb7199be1be7417aa0f8e38d0f067e91ef0edc0 100644
--- a/Marlin/example_configurations/K8200/Configuration_adv.h
+++ b/Marlin/example_configurations/K8200/Configuration_adv.h
@@ -473,15 +473,19 @@
#endif // SDSUPPORT
-// for dogm lcd displays you can choose some additional fonts:
+// Some additional options are available for graphical displays:
#if ENABLED(DOGLCD)
- // save 3120 bytes of PROGMEM by commenting out #define USE_BIG_EDIT_FONT
- // we don't have a big font for Cyrillic, Kana
+ // A bigger font is available for edit items. Costs 3120 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_BIG_EDIT_FONT
- // If you have spare 2300Byte of progmem and want to use a
- // smaller font on the Info-screen uncomment the next line.
+ // A smaller font may be used on the Info Screen. Costs 2300 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_SMALL_INFOFONT
+
+ // Enable this option and reduce the value to optimize screen updates.
+ // The normal delay is 10µs. Use the lowest value that still gives a reliable display.
+ //#define DOGM_SPI_DELAY_US 5
#endif // DOGLCD
// @section safety
diff --git a/Marlin/example_configurations/K8400/Configuration_adv.h b/Marlin/example_configurations/K8400/Configuration_adv.h
index 286641939e6c911b21e2255c088b11e0712bb8f0..d5be523ab0a4ac9575fd10193489b27f8e81e44d 100644
--- a/Marlin/example_configurations/K8400/Configuration_adv.h
+++ b/Marlin/example_configurations/K8400/Configuration_adv.h
@@ -460,15 +460,19 @@
#endif // SDSUPPORT
-// for dogm lcd displays you can choose some additional fonts:
+// Some additional options are available for graphical displays:
#if ENABLED(DOGLCD)
- // save 3120 bytes of PROGMEM by commenting out #define USE_BIG_EDIT_FONT
- // we don't have a big font for Cyrillic, Kana
+ // A bigger font is available for edit items. Costs 3120 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_BIG_EDIT_FONT
- // If you have spare 2300Byte of progmem and want to use a
- // smaller font on the Info-screen uncomment the next line.
+ // A smaller font may be used on the Info Screen. Costs 2300 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_SMALL_INFOFONT
+
+ // Enable this option and reduce the value to optimize screen updates.
+ // The normal delay is 10µs. Use the lowest value that still gives a reliable display.
+ //#define DOGM_SPI_DELAY_US 5
#endif // DOGLCD
// @section safety
diff --git a/Marlin/example_configurations/RigidBot/Configuration_adv.h b/Marlin/example_configurations/RigidBot/Configuration_adv.h
index df3265ea1fbf204b5d79dc57b6103db12e8cddef..c71179460b2fc96117ec5b4b6687c7404384e5e8 100644
--- a/Marlin/example_configurations/RigidBot/Configuration_adv.h
+++ b/Marlin/example_configurations/RigidBot/Configuration_adv.h
@@ -460,15 +460,19 @@
#endif // SDSUPPORT
-// for dogm lcd displays you can choose some additional fonts:
+// Some additional options are available for graphical displays:
#if ENABLED(DOGLCD)
- // save 3120 bytes of PROGMEM by commenting out #define USE_BIG_EDIT_FONT
- // we don't have a big font for Cyrillic, Kana
+ // A bigger font is available for edit items. Costs 3120 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_BIG_EDIT_FONT
- // If you have spare 2300Byte of progmem and want to use a
- // smaller font on the Info-screen uncomment the next line.
+ // A smaller font may be used on the Info Screen. Costs 2300 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_SMALL_INFOFONT
+
+ // Enable this option and reduce the value to optimize screen updates.
+ // The normal delay is 10µs. Use the lowest value that still gives a reliable display.
+ //#define DOGM_SPI_DELAY_US 5
#endif // DOGLCD
// @section safety
diff --git a/Marlin/example_configurations/SCARA/Configuration_adv.h b/Marlin/example_configurations/SCARA/Configuration_adv.h
index 0921b8ccd8969830a3ebcea98cb53c2c5a6bdb0e..63cc1bc4eb23a1faeacc4d245ace162a619ce7c7 100644
--- a/Marlin/example_configurations/SCARA/Configuration_adv.h
+++ b/Marlin/example_configurations/SCARA/Configuration_adv.h
@@ -460,15 +460,19 @@
#endif // SDSUPPORT
-// for dogm lcd displays you can choose some additional fonts:
+// Some additional options are available for graphical displays:
#if ENABLED(DOGLCD)
- // save 3120 bytes of PROGMEM by commenting out #define USE_BIG_EDIT_FONT
- // we don't have a big font for Cyrillic, Kana
+ // A bigger font is available for edit items. Costs 3120 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_BIG_EDIT_FONT
- // If you have spare 2300Byte of progmem and want to use a
- // smaller font on the Info-screen uncomment the next line.
+ // A smaller font may be used on the Info Screen. Costs 2300 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_SMALL_INFOFONT
+
+ // Enable this option and reduce the value to optimize screen updates.
+ // The normal delay is 10µs. Use the lowest value that still gives a reliable display.
+ //#define DOGM_SPI_DELAY_US 5
#endif // DOGLCD
// @section safety
diff --git a/Marlin/example_configurations/TAZ4/Configuration_adv.h b/Marlin/example_configurations/TAZ4/Configuration_adv.h
index 3611baff046b5354d4dec6e8eabba4c043b8412a..3163bebeabf1dc9aa0eec0fa55fa55cfff51f457 100644
--- a/Marlin/example_configurations/TAZ4/Configuration_adv.h
+++ b/Marlin/example_configurations/TAZ4/Configuration_adv.h
@@ -468,15 +468,19 @@
#endif // SDSUPPORT
-// for dogm lcd displays you can choose some additional fonts:
+// Some additional options are available for graphical displays:
#if ENABLED(DOGLCD)
- // save 3120 bytes of PROGMEM by commenting out #define USE_BIG_EDIT_FONT
- // we don't have a big font for Cyrillic, Kana
+ // A bigger font is available for edit items. Costs 3120 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_BIG_EDIT_FONT
- // If you have spare 2300Byte of progmem and want to use a
- // smaller font on the Info-screen uncomment the next line.
+ // A smaller font may be used on the Info Screen. Costs 2300 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_SMALL_INFOFONT
+
+ // Enable this option and reduce the value to optimize screen updates.
+ // The normal delay is 10µs. Use the lowest value that still gives a reliable display.
+ //#define DOGM_SPI_DELAY_US 5
#endif // DOGLCD
// @section safety
diff --git a/Marlin/example_configurations/WITBOX/Configuration_adv.h b/Marlin/example_configurations/WITBOX/Configuration_adv.h
index 1d2677bf3fd378550fcec48bfaeeb1cf801c0ead..c04fe920262ba81e58f41625d7c69440618ba62e 100644
--- a/Marlin/example_configurations/WITBOX/Configuration_adv.h
+++ b/Marlin/example_configurations/WITBOX/Configuration_adv.h
@@ -460,15 +460,19 @@
#endif // SDSUPPORT
-// for dogm lcd displays you can choose some additional fonts:
+// Some additional options are available for graphical displays:
#if ENABLED(DOGLCD)
- // save 3120 bytes of PROGMEM by commenting out #define USE_BIG_EDIT_FONT
- // we don't have a big font for Cyrillic, Kana
+ // A bigger font is available for edit items. Costs 3120 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_BIG_EDIT_FONT
- // If you have spare 2300Byte of progmem and want to use a
- // smaller font on the Info-screen uncomment the next line.
+ // A smaller font may be used on the Info Screen. Costs 2300 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_SMALL_INFOFONT
+
+ // Enable this option and reduce the value to optimize screen updates.
+ // The normal delay is 10µs. Use the lowest value that still gives a reliable display.
+ //#define DOGM_SPI_DELAY_US 5
#endif // DOGLCD
// @section safety
diff --git a/Marlin/example_configurations/delta/biv2.5/Configuration_adv.h b/Marlin/example_configurations/delta/biv2.5/Configuration_adv.h
index 3946242f386f0a292d7a8158bb3c82db93b3ef10..1617cbb68bdc90cc7f0d883f43bc3884dfb94350 100644
--- a/Marlin/example_configurations/delta/biv2.5/Configuration_adv.h
+++ b/Marlin/example_configurations/delta/biv2.5/Configuration_adv.h
@@ -462,15 +462,19 @@
#endif // SDSUPPORT
-// for dogm lcd displays you can choose some additional fonts:
+// Some additional options are available for graphical displays:
#if ENABLED(DOGLCD)
- // save 3120 bytes of PROGMEM by commenting out #define USE_BIG_EDIT_FONT
- // we don't have a big font for Cyrillic, Kana
+ // A bigger font is available for edit items. Costs 3120 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_BIG_EDIT_FONT
- // If you have spare 2300Byte of progmem and want to use a
- // smaller font on the Info-screen uncomment the next line.
+ // A smaller font may be used on the Info Screen. Costs 2300 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_SMALL_INFOFONT
+
+ // Enable this option and reduce the value to optimize screen updates.
+ // The normal delay is 10µs. Use the lowest value that still gives a reliable display.
+ //#define DOGM_SPI_DELAY_US 5
#endif // DOGLCD
// @section safety
diff --git a/Marlin/example_configurations/delta/generic/Configuration_adv.h b/Marlin/example_configurations/delta/generic/Configuration_adv.h
index 2d7bca0dbbbc5551f9216f84ae1d64eaa8615694..0cc37d5919283c599411a3b341859abb9b53015c 100644
--- a/Marlin/example_configurations/delta/generic/Configuration_adv.h
+++ b/Marlin/example_configurations/delta/generic/Configuration_adv.h
@@ -462,15 +462,19 @@
#endif // SDSUPPORT
-// for dogm lcd displays you can choose some additional fonts:
+// Some additional options are available for graphical displays:
#if ENABLED(DOGLCD)
- // save 3120 bytes of PROGMEM by commenting out #define USE_BIG_EDIT_FONT
- // we don't have a big font for Cyrillic, Kana
+ // A bigger font is available for edit items. Costs 3120 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_BIG_EDIT_FONT
- // If you have spare 2300Byte of progmem and want to use a
- // smaller font on the Info-screen uncomment the next line.
+ // A smaller font may be used on the Info Screen. Costs 2300 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_SMALL_INFOFONT
+
+ // Enable this option and reduce the value to optimize screen updates.
+ // The normal delay is 10µs. Use the lowest value that still gives a reliable display.
+ //#define DOGM_SPI_DELAY_US 5
#endif // DOGLCD
// @section safety
diff --git a/Marlin/example_configurations/delta/kossel_mini/Configuration_adv.h b/Marlin/example_configurations/delta/kossel_mini/Configuration_adv.h
index 2d7bca0dbbbc5551f9216f84ae1d64eaa8615694..0cc37d5919283c599411a3b341859abb9b53015c 100644
--- a/Marlin/example_configurations/delta/kossel_mini/Configuration_adv.h
+++ b/Marlin/example_configurations/delta/kossel_mini/Configuration_adv.h
@@ -462,15 +462,19 @@
#endif // SDSUPPORT
-// for dogm lcd displays you can choose some additional fonts:
+// Some additional options are available for graphical displays:
#if ENABLED(DOGLCD)
- // save 3120 bytes of PROGMEM by commenting out #define USE_BIG_EDIT_FONT
- // we don't have a big font for Cyrillic, Kana
+ // A bigger font is available for edit items. Costs 3120 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_BIG_EDIT_FONT
- // If you have spare 2300Byte of progmem and want to use a
- // smaller font on the Info-screen uncomment the next line.
+ // A smaller font may be used on the Info Screen. Costs 2300 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_SMALL_INFOFONT
+
+ // Enable this option and reduce the value to optimize screen updates.
+ // The normal delay is 10µs. Use the lowest value that still gives a reliable display.
+ //#define DOGM_SPI_DELAY_US 5
#endif // DOGLCD
// @section safety
diff --git a/Marlin/example_configurations/delta/kossel_pro/Configuration_adv.h b/Marlin/example_configurations/delta/kossel_pro/Configuration_adv.h
index 91c389f1dd8c259e981c357f2ee12ba781605bc5..14cf0fa5ff8f145178ab194a93c63c89fa7b966b 100644
--- a/Marlin/example_configurations/delta/kossel_pro/Configuration_adv.h
+++ b/Marlin/example_configurations/delta/kossel_pro/Configuration_adv.h
@@ -467,15 +467,19 @@
#endif // SDSUPPORT
-// for dogm lcd displays you can choose some additional fonts:
+// Some additional options are available for graphical displays:
#if ENABLED(DOGLCD)
- // save 3120 bytes of PROGMEM by commenting out #define USE_BIG_EDIT_FONT
- // we don't have a big font for Cyrillic, Kana
+ // A bigger font is available for edit items. Costs 3120 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_BIG_EDIT_FONT
- // If you have spare 2300Byte of progmem and want to use a
- // smaller font on the Info-screen uncomment the next line.
+ // A smaller font may be used on the Info Screen. Costs 2300 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_SMALL_INFOFONT
+
+ // Enable this option and reduce the value to optimize screen updates.
+ // The normal delay is 10µs. Use the lowest value that still gives a reliable display.
+ //#define DOGM_SPI_DELAY_US 5
#endif // DOGLCD
// @section safety
diff --git a/Marlin/example_configurations/delta/kossel_xl/Configuration_adv.h b/Marlin/example_configurations/delta/kossel_xl/Configuration_adv.h
index a76c1fc98b3e00d0440c37ed95a2dd4a8ac7877a..45d077bf95f7f6e20218b797b767c6ba15574210 100644
--- a/Marlin/example_configurations/delta/kossel_xl/Configuration_adv.h
+++ b/Marlin/example_configurations/delta/kossel_xl/Configuration_adv.h
@@ -462,15 +462,19 @@
#endif // SDSUPPORT
-// for dogm lcd displays you can choose some additional fonts:
+// Some additional options are available for graphical displays:
#if ENABLED(DOGLCD)
- // save 3120 bytes of PROGMEM by commenting out #define USE_BIG_EDIT_FONT
- // we don't have a big font for Cyrillic, Kana
+ // A bigger font is available for edit items. Costs 3120 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_BIG_EDIT_FONT
- // If you have spare 2300Byte of progmem and want to use a
- // smaller font on the Info-screen uncomment the next line.
+ // A smaller font may be used on the Info Screen. Costs 2300 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_SMALL_INFOFONT
+
+ // Enable this option and reduce the value to optimize screen updates.
+ // The normal delay is 10µs. Use the lowest value that still gives a reliable display.
+ //#define DOGM_SPI_DELAY_US 5
#endif // DOGLCD
// @section safety
diff --git a/Marlin/example_configurations/makibox/Configuration_adv.h b/Marlin/example_configurations/makibox/Configuration_adv.h
index a72f7ff5039ef812254417b002e7ef6d10bc0ef7..cf3a9262610b3140899952e95032e94ecbb06159 100644
--- a/Marlin/example_configurations/makibox/Configuration_adv.h
+++ b/Marlin/example_configurations/makibox/Configuration_adv.h
@@ -460,15 +460,19 @@
#endif // SDSUPPORT
-// for dogm lcd displays you can choose some additional fonts:
+// Some additional options are available for graphical displays:
#if ENABLED(DOGLCD)
- // save 3120 bytes of PROGMEM by commenting out #define USE_BIG_EDIT_FONT
- // we don't have a big font for Cyrillic, Kana
+ // A bigger font is available for edit items. Costs 3120 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_BIG_EDIT_FONT
- // If you have spare 2300Byte of progmem and want to use a
- // smaller font on the Info-screen uncomment the next line.
+ // A smaller font may be used on the Info Screen. Costs 2300 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_SMALL_INFOFONT
+
+ // Enable this option and reduce the value to optimize screen updates.
+ // The normal delay is 10µs. Use the lowest value that still gives a reliable display.
+ //#define DOGM_SPI_DELAY_US 5
#endif // DOGLCD
// @section safety
diff --git a/Marlin/example_configurations/tvrrug/Round2/Configuration_adv.h b/Marlin/example_configurations/tvrrug/Round2/Configuration_adv.h
index 63c0913f186846b280e0078599d47cf49567f619..312f4bdab5754c5287f8a4aafdaaa43513f31668 100644
--- a/Marlin/example_configurations/tvrrug/Round2/Configuration_adv.h
+++ b/Marlin/example_configurations/tvrrug/Round2/Configuration_adv.h
@@ -460,15 +460,19 @@
#endif // SDSUPPORT
-// for dogm lcd displays you can choose some additional fonts:
+// Some additional options are available for graphical displays:
#if ENABLED(DOGLCD)
- // save 3120 bytes of PROGMEM by commenting out #define USE_BIG_EDIT_FONT
- // we don't have a big font for Cyrillic, Kana
+ // A bigger font is available for edit items. Costs 3120 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_BIG_EDIT_FONT
- // If you have spare 2300Byte of progmem and want to use a
- // smaller font on the Info-screen uncomment the next line.
+ // A smaller font may be used on the Info Screen. Costs 2300 bytes of PROGMEM.
+ // Western only. Not available for Cyrillic, Kana, Turkish, Greek, or Chinese.
//#define USE_SMALL_INFOFONT
+
+ // Enable this option and reduce the value to optimize screen updates.
+ // The normal delay is 10µs. Use the lowest value that still gives a reliable display.
+ //#define DOGM_SPI_DELAY_US 5
#endif // DOGLCD
// @section safety
diff --git a/Marlin/ultralcd_st7920_u8glib_rrd.h b/Marlin/ultralcd_st7920_u8glib_rrd.h
index 7226f55c9e6bf09a25d6b0753879567011a7f7a5..1dc39360f964907c38fdeb7269315165925b2788 100644
--- a/Marlin/ultralcd_st7920_u8glib_rrd.h
+++ b/Marlin/ultralcd_st7920_u8glib_rrd.h
@@ -106,12 +106,18 @@ static void ST7920_SWSPI_SND_8BIT(uint8_t val) {
ST7920_SND_BIT; // 8
}
-#define ST7920_CS() {WRITE(ST7920_CS_PIN,1);u8g_10MicroDelay();}
-#define ST7920_NCS() {WRITE(ST7920_CS_PIN,0);}
-#define ST7920_SET_CMD() {ST7920_SWSPI_SND_8BIT(0xf8);u8g_10MicroDelay();}
-#define ST7920_SET_DAT() {ST7920_SWSPI_SND_8BIT(0xfa);u8g_10MicroDelay();}
-#define ST7920_WRITE_BYTE(a) {ST7920_SWSPI_SND_8BIT((uint8_t)((a)&0xf0u));ST7920_SWSPI_SND_8BIT((uint8_t)((a)<<4u));u8g_10MicroDelay();}
-#define ST7920_WRITE_BYTES(p,l) {uint8_t i;for(i=0;i<l;i++){ST7920_SWSPI_SND_8BIT(*p&0xf0);ST7920_SWSPI_SND_8BIT(*p<<4);p++;}u8g_10MicroDelay();}
+#if defined(DOGM_SPI_DELAY_US) && DOGM_SPI_DELAY_US > 0
+ #define U8G_DELAY() delayMicroseconds(DOGM_SPI_DELAY_US)
+#else
+ #define U8G_DELAY() u8g_10MicroDelay()
+#endif
+
+#define ST7920_CS() { WRITE(ST7920_CS_PIN,1); U8G_DELAY(); }
+#define ST7920_NCS() { WRITE(ST7920_CS_PIN,0); }
+#define ST7920_SET_CMD() { ST7920_SWSPI_SND_8BIT(0xf8); U8G_DELAY(); }
+#define ST7920_SET_DAT() { ST7920_SWSPI_SND_8BIT(0xfa); U8G_DELAY(); }
+#define ST7920_WRITE_BYTE(a) { ST7920_SWSPI_SND_8BIT((uint8_t)((a)&0xf0u)); ST7920_SWSPI_SND_8BIT((uint8_t)((a)<<4u)); U8G_DELAY(); }
+#define ST7920_WRITE_BYTES(p,l) { for (uint8_t i = l + 1; --i;) { ST7920_SWSPI_SND_8BIT(*p&0xf0); ST7920_SWSPI_SND_8BIT(*p<<4); p++; } U8G_DELAY(); }
uint8_t u8g_dev_rrd_st7920_128x64_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg) {
uint8_t i, y;
@@ -167,13 +173,13 @@ uint8_t u8g_dev_rrd_st7920_128x64_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, vo
}
break;
}
-#if PAGE_HEIGHT == 8
- return u8g_dev_pb8h1_base_fn(u8g, dev, msg, arg);
-#elif PAGE_HEIGHT == 16
- return u8g_dev_pb16h1_base_fn(u8g, dev, msg, arg);
-#else
- return u8g_dev_pb32h1_base_fn(u8g, dev, msg, arg);
-#endif
+ #if PAGE_HEIGHT == 8
+ return u8g_dev_pb8h1_base_fn(u8g, dev, msg, arg);
+ #elif PAGE_HEIGHT == 16
+ return u8g_dev_pb16h1_base_fn(u8g, dev, msg, arg);
+ #else
+ return u8g_dev_pb32h1_base_fn(u8g, dev, msg, arg);
+ #endif
}
uint8_t u8g_dev_st7920_128x64_rrd_buf[(LCD_PIXEL_WIDTH) * (PAGE_HEIGHT) / 8] U8G_NOCOMMON;