Balance mega tests, shorten some env names

.github/workflows/test-builds.yml

         - DUE
         - esp32
         - linux_native
-        - megaatmega2560
+        - mega2560
         - teensy31
         - teensy35
         - SAMD51_grandcentral_m4
         # Extended AVR Environments
 
         - FYSETC_F6_13
-        - megaatmega1280
+        - mega1280
         - rambo
-        - sanguino_atmega1284p
-        - sanguino_atmega644p
+        - sanguino1284p
+        - sanguino644p
 
         # Extended STM32 Environments
 
-        - STM32F103RC_bigtree
-        - STM32F103RC_bigtree_USB
-        - STM32F103RE_bigtree
-        - STM32F103RE_bigtree_USB
+        - STM32F103RC_btt
+        - STM32F103RC_btt_USB
+        - STM32F103RE_btt
+        - STM32F103RE_btt_USB
         - STM32F103RC_fysetc
         - jgaurora_a5s_a1
         - STM32F103VE_longer

Marlin/src/pins/pins.h

 //
 
 #if MB(RAMPS_OLD)
-  #include "ramps/pins_RAMPS_OLD.h"             // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_RAMPS_OLD.h"             // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(RAMPS_13_EFB)
-  #include "ramps/pins_RAMPS_13.h"              // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_RAMPS_13.h"              // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(RAMPS_13_EEB)
-  #include "ramps/pins_RAMPS_13.h"              // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_RAMPS_13.h"              // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(RAMPS_13_EFF)
-  #include "ramps/pins_RAMPS_13.h"              // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_RAMPS_13.h"              // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(RAMPS_13_EEF)
-  #include "ramps/pins_RAMPS_13.h"              // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_RAMPS_13.h"              // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(RAMPS_13_SF)
-  #include "ramps/pins_RAMPS_13.h"              // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_RAMPS_13.h"              // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(RAMPS_14_EFB)
-  #include "ramps/pins_RAMPS.h"                 // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_RAMPS.h"                 // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(RAMPS_14_EEB)
-  #include "ramps/pins_RAMPS.h"                 // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_RAMPS.h"                 // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(RAMPS_14_EFF)
-  #include "ramps/pins_RAMPS.h"                 // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_RAMPS.h"                 // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(RAMPS_14_EEF)
-  #include "ramps/pins_RAMPS.h"                 // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_RAMPS.h"                 // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(RAMPS_14_SF)
-  #include "ramps/pins_RAMPS.h"                 // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_RAMPS.h"                 // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(RAMPS_PLUS_EFB)
-  #include "ramps/pins_RAMPS_PLUS.h"            // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_RAMPS_PLUS.h"            // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(RAMPS_PLUS_EEB)
-  #include "ramps/pins_RAMPS_PLUS.h"            // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_RAMPS_PLUS.h"            // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(RAMPS_PLUS_EFF)
-  #include "ramps/pins_RAMPS_PLUS.h"            // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_RAMPS_PLUS.h"            // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(RAMPS_PLUS_EEF)
-  #include "ramps/pins_RAMPS_PLUS.h"            // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_RAMPS_PLUS.h"            // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(RAMPS_PLUS_SF)
-  #include "ramps/pins_RAMPS_PLUS.h"            // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_RAMPS_PLUS.h"            // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 
 //
 // RAMPS Derivatives - ATmega1280, ATmega2560
 //
 
 #elif MB(3DRAG)
-  #include "ramps/pins_3DRAG.h"                 // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_3DRAG.h"                 // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(K8200)
-  #include "ramps/pins_K8200.h"                 // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560 (3DRAG)
+  #include "ramps/pins_K8200.h"                 // ATmega1280, ATmega2560                 env:mega1280 env:mega2560 (3DRAG)
 #elif MB(K8400)
-  #include "ramps/pins_K8400.h"                 // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560 (3DRAG)
+  #include "ramps/pins_K8400.h"                 // ATmega1280, ATmega2560                 env:mega1280 env:mega2560 (3DRAG)
 #elif MB(K8800)
-  #include "ramps/pins_K8800.h"                 // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560 (3DRAG)
+  #include "ramps/pins_K8800.h"                 // ATmega1280, ATmega2560                 env:mega1280 env:mega2560 (3DRAG)
 #elif MB(BAM_DICE)
-  #include "ramps/pins_RAMPS.h"                 // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_RAMPS.h"                 // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(BAM_DICE_DUE)
-  #include "ramps/pins_BAM_DICE_DUE.h"          // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_BAM_DICE_DUE.h"          // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(MKS_BASE)
-  #include "ramps/pins_MKS_BASE_10.h"           // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_MKS_BASE_10.h"           // ATmega2560                             env:mega2560
 #elif MB(MKS_BASE_14)
-  #include "ramps/pins_MKS_BASE_14.h"           // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_MKS_BASE_14.h"           // ATmega2560                             env:mega2560
 #elif MB(MKS_BASE_15)
-  #include "ramps/pins_MKS_BASE_15.h"           // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_MKS_BASE_15.h"           // ATmega2560                             env:mega2560
 #elif MB(MKS_BASE_16)
-  #include "ramps/pins_MKS_BASE_16.h"           // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_MKS_BASE_16.h"           // ATmega2560                             env:mega2560
 #elif MB(MKS_BASE_HEROIC)
-  #include "ramps/pins_MKS_BASE_HEROIC.h"       // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_MKS_BASE_HEROIC.h"       // ATmega2560                             env:mega2560
 #elif MB(MKS_GEN_13)
-  #include "ramps/pins_MKS_GEN_13.h"            // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_MKS_GEN_13.h"            // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(MKS_GEN_L)
-  #include "ramps/pins_MKS_GEN_L.h"             // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_MKS_GEN_L.h"             // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(KFB_2)
-  #include "ramps/pins_BIQU_KFB_2.h"            // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_BIQU_KFB_2.h"            // ATmega2560                             env:mega2560
 #elif MB(ZRIB_V20)
-  #include "ramps/pins_ZRIB_V20.h"              // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560 (MKS_GEN_13)
+  #include "ramps/pins_ZRIB_V20.h"              // ATmega1280, ATmega2560                 env:mega1280 env:mega2560 (MKS_GEN_13)
 #elif MB(FELIX2)
-  #include "ramps/pins_FELIX2.h"                // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_FELIX2.h"                // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(RIGIDBOARD)
-  #include "ramps/pins_RIGIDBOARD.h"            // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_RIGIDBOARD.h"            // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(RIGIDBOARD_V2)
-  #include "ramps/pins_RIGIDBOARD_V2.h"         // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_RIGIDBOARD_V2.h"         // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(SAINSMART_2IN1)
-  #include "ramps/pins_SAINSMART_2IN1.h"        // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_SAINSMART_2IN1.h"        // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(ULTIMAKER)
-  #include "ramps/pins_ULTIMAKER.h"             // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_ULTIMAKER.h"             // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(ULTIMAKER_OLD)
-  #include "ramps/pins_ULTIMAKER_OLD.h"         // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "ramps/pins_ULTIMAKER_OLD.h"         // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(AZTEEG_X3)
-  #include "ramps/pins_AZTEEG_X3.h"             // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_AZTEEG_X3.h"             // ATmega2560                             env:mega2560
 #elif MB(AZTEEG_X3_PRO)
-  #include "ramps/pins_AZTEEG_X3_PRO.h"         // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_AZTEEG_X3_PRO.h"         // ATmega2560                             env:mega2560
 #elif MB(ULTIMAIN_2)
-  #include "ramps/pins_ULTIMAIN_2.h"            // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_ULTIMAIN_2.h"            // ATmega2560                             env:mega2560
 #elif MB(FORMBOT_RAPTOR)
-  #include "ramps/pins_FORMBOT_RAPTOR.h"        // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_FORMBOT_RAPTOR.h"        // ATmega2560                             env:mega2560
 #elif MB(FORMBOT_RAPTOR2)
-  #include "ramps/pins_FORMBOT_RAPTOR2.h"       // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_FORMBOT_RAPTOR2.h"       // ATmega2560                             env:mega2560
 #elif MB(FORMBOT_TREX2PLUS)
-  #include "ramps/pins_FORMBOT_TREX2PLUS.h"     // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_FORMBOT_TREX2PLUS.h"     // ATmega2560                             env:mega2560
 #elif MB(FORMBOT_TREX3)
-  #include "ramps/pins_FORMBOT_TREX3.h"         // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_FORMBOT_TREX3.h"         // ATmega2560                             env:mega2560
 #elif MB(RUMBA)
-  #include "ramps/pins_RUMBA.h"                 // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_RUMBA.h"                 // ATmega2560                             env:mega2560
 #elif MB(RUMBA_RAISE3D)
-  #include "ramps/pins_RUMBA_RAISE3D.h"         // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_RUMBA_RAISE3D.h"         // ATmega2560                             env:mega2560
 #elif MB(RL200)
-  #include "ramps/pins_RL200.h"                 // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_RL200.h"                 // ATmega2560                             env:mega2560
 #elif MB(BQ_ZUM_MEGA_3D)
-  #include "ramps/pins_BQ_ZUM_MEGA_3D.h"        // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_BQ_ZUM_MEGA_3D.h"        // ATmega2560                             env:mega2560
 #elif MB(MAKEBOARD_MINI)
-  #include "ramps/pins_MAKEBOARD_MINI.h"        // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_MAKEBOARD_MINI.h"        // ATmega2560                             env:mega2560
 #elif MB(TRIGORILLA_13)
-  #include "ramps/pins_TRIGORILLA_13.h"         // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_TRIGORILLA_13.h"         // ATmega2560                             env:mega2560
 #elif MB(TRIGORILLA_14)
-  #include "ramps/pins_TRIGORILLA_14.h"         // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_TRIGORILLA_14.h"         // ATmega2560                             env:mega2560
 #elif MB(TRIGORILLA_14_11)
-  #include "ramps/pins_TRIGORILLA_14.h"         // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_TRIGORILLA_14.h"         // ATmega2560                             env:mega2560
 #elif MB(RAMPS_ENDER_4)
-  #include "ramps/pins_RAMPS_ENDER_4.h"         // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_RAMPS_ENDER_4.h"         // ATmega2560                             env:mega2560
 #elif MB(RAMPS_CREALITY)
-  #include "ramps/pins_RAMPS_CREALITY.h"        // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_RAMPS_CREALITY.h"        // ATmega2560                             env:mega2560
 #elif MB(RAMPS_DAGOMA)
-  #include "ramps/pins_RAMPS_DAGOMA.h"          // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_RAMPS_DAGOMA.h"          // ATmega2560                             env:mega2560
 #elif MB(FYSETC_F6_13)
   #include "ramps/pins_FYSETC_F6_13.h"          // ATmega2560                             env:FYSETC_F6_13
 #elif MB(FYSETC_F6_14)
   #include "ramps/pins_FYSETC_F6_14.h"          // ATmega2560                             env:FYSETC_F6_14
 #elif MB(DUPLICATOR_I3_PLUS)
-  #include "ramps/pins_DUPLICATOR_I3_PLUS.h"    // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_DUPLICATOR_I3_PLUS.h"    // ATmega2560                             env:mega2560
 #elif MB(VORON)
-  #include "ramps/pins_VORON.h"                 // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_VORON.h"                 // ATmega2560                             env:mega2560
 #elif MB(TRONXY_V3_1_0)
-  #include "ramps/pins_TRONXY_V3_1_0.h"         // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_TRONXY_V3_1_0.h"         // ATmega2560                             env:mega2560
 #elif MB(Z_BOLT_X_SERIES)
-  #include "ramps/pins_Z_BOLT_X_SERIES.h"       // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_Z_BOLT_X_SERIES.h"       // ATmega2560                             env:mega2560
 #elif MB(TT_OSCAR)
-  #include "ramps/pins_TT_OSCAR.h"              // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_TT_OSCAR.h"              // ATmega2560                             env:mega2560
 #elif MB(TANGO)
-  #include "ramps/pins_TANGO.h"                 // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_TANGO.h"                 // ATmega2560                             env:mega2560
 #elif MB(MKS_GEN_L_V2)
-  #include "ramps/pins_MKS_GEN_L_V2.h"          // ATmega2560                             env:megaatmega2560
+  #include "ramps/pins_MKS_GEN_L_V2.h"          // ATmega2560                             env:mega2560
 
 //
 // RAMBo and derivatives
 //
 
 #elif MB(CNCONTROLS_11)
-  #include "mega/pins_CNCONTROLS_11.h"          // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "mega/pins_CNCONTROLS_11.h"          // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(CNCONTROLS_12)
-  #include "mega/pins_CNCONTROLS_12.h"          // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "mega/pins_CNCONTROLS_12.h"          // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(CNCONTROLS_15)
-  #include "mega/pins_CNCONTROLS_15.h"          // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "mega/pins_CNCONTROLS_15.h"          // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(MIGHTYBOARD_REVE)
-  #include "mega/pins_MIGHTYBOARD_REVE.h"       // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "mega/pins_MIGHTYBOARD_REVE.h"       // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(CHEAPTRONIC)
-  #include "mega/pins_CHEAPTRONIC.h"            // ATmega2560                             env:megaatmega2560
+  #include "mega/pins_CHEAPTRONIC.h"            // ATmega2560                             env:mega2560
 #elif MB(CHEAPTRONIC_V2)
-  #include "mega/pins_CHEAPTRONICv2.h"          // ATmega2560                             env:megaatmega2560
+  #include "mega/pins_CHEAPTRONICv2.h"          // ATmega2560                             env:mega2560
 #elif MB(MEGATRONICS)
-  #include "mega/pins_MEGATRONICS.h"            // ATmega2560                             env:megaatmega2560
+  #include "mega/pins_MEGATRONICS.h"            // ATmega2560                             env:mega2560
 #elif MB(MEGATRONICS_2)
-  #include "mega/pins_MEGATRONICS_2.h"          // ATmega2560                             env:megaatmega2560
+  #include "mega/pins_MEGATRONICS_2.h"          // ATmega2560                             env:mega2560
 #elif MB(MEGATRONICS_3, MEGATRONICS_31, MEGATRONICS_32)
-  #include "mega/pins_MEGATRONICS_3.h"          // ATmega2560                             env:megaatmega2560
+  #include "mega/pins_MEGATRONICS_3.h"          // ATmega2560                             env:mega2560
 #elif MB(ELEFU_3)
-  #include "mega/pins_ELEFU_3.h"                // ATmega2560                             env:megaatmega2560
+  #include "mega/pins_ELEFU_3.h"                // ATmega2560                             env:mega2560
 #elif MB(LEAPFROG)
-  #include "mega/pins_LEAPFROG.h"               // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "mega/pins_LEAPFROG.h"               // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(MEGACONTROLLER)
-  #include "mega/pins_MEGACONTROLLER.h"         // ATmega2560                             env:megaatmega2560
+  #include "mega/pins_MEGACONTROLLER.h"         // ATmega2560                             env:mega2560
 #elif MB(GT2560_REV_A)
-  #include "mega/pins_GT2560_REV_A.h"           // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "mega/pins_GT2560_REV_A.h"           // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(GT2560_REV_A_PLUS)
-  #include "mega/pins_GT2560_REV_A_PLUS.h"      // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "mega/pins_GT2560_REV_A_PLUS.h"      // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(GT2560_V3)
-  #include "mega/pins_GT2560_V3.h"              // ATmega2560                             env:megaatmega2560
+  #include "mega/pins_GT2560_V3.h"              // ATmega2560                             env:mega2560
 #elif MB(GT2560_V3_MC2)
-  #include "mega/pins_GT2560_V3_MC2.h"          // ATmega2560                             env:megaatmega2560
+  #include "mega/pins_GT2560_V3_MC2.h"          // ATmega2560                             env:mega2560
 #elif MB(GT2560_V3_A20)
-  #include "mega/pins_GT2560_V3_A20.h"          // ATmega2560                             env:megaatmega2560
+  #include "mega/pins_GT2560_V3_A20.h"          // ATmega2560                             env:mega2560
 #elif MB(EINSTART_S)
-  #include "mega/pins_EINSTART-S.h"             // ATmega1280, ATmega2560                 env:megaatmega1280 env:megaatmega2560
+  #include "mega/pins_EINSTART-S.h"             // ATmega1280, ATmega2560                 env:mega1280 env:mega2560
 #elif MB(WANHAO_ONEPLUS)
-  #include "mega/pins_WANHAO_ONEPLUS.h"         // ATmega2560                             env:megaatmega2560
+  #include "mega/pins_WANHAO_ONEPLUS.h"         // ATmega2560                             env:mega2560
 #elif MB(OVERLORD)
-  #include "mega/pins_OVERLORD.h"               // ATmega2560                             env:megaatmega2560
+  #include "mega/pins_OVERLORD.h"               // ATmega2560                             env:mega2560
 #elif MB(HJC2560C_REV2)
-  #include "mega/pins_HJC2560C_REV2.h"          // ATmega2560                             env:megaatmega2560
+  #include "mega/pins_HJC2560C_REV2.h"          // ATmega2560                             env:mega2560
 #elif MB(LEAPFROG_XEED2015)
-  #include "mega/pins_LEAPFROG_XEED2015.h"      // ATmega2560                             env:megaatmega2560
+  #include "mega/pins_LEAPFROG_XEED2015.h"      // ATmega2560                             env:mega2560
 #elif MB(PICA)
-  #include "mega/pins_PICA.h"                   // ATmega2560                             env:megaatmega2560
+  #include "mega/pins_PICA.h"                   // ATmega2560                             env:mega2560
 #elif MB(PICA_REVB)
-  #include "mega/pins_PICAOLD.h"                // ATmega2560                             env:megaatmega2560
+  #include "mega/pins_PICAOLD.h"                // ATmega2560                             env:mega2560
 
 //
 // ATmega1281, ATmega2561
 //
 
 #elif MB(MINITRONICS)
-  #include "mega/pins_MINITRONICS.h"            // ATmega1281                             env:megaatmega1280
+  #include "mega/pins_MINITRONICS.h"            // ATmega1281                             env:mega1280
 #elif MB(SILVER_GATE)
-  #include "mega/pins_SILVER_GATE.h"            // ATmega2561                             env:megaatmega2560
+  #include "mega/pins_SILVER_GATE.h"            // ATmega2561                             env:mega2560
 
 //
 // Sanguinololu and Derivatives - ATmega644P, ATmega1284P
 //
 
 #elif MB(SANGUINOLOLU_11)
-  #include "sanguino/pins_SANGUINOLOLU_11.h"    // ATmega644P, ATmega1284P                env:sanguino_atmega644p env:sanguino_atmega1284p
+  #include "sanguino/pins_SANGUINOLOLU_11.h"    // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
 #elif MB(SANGUINOLOLU_12)
-  #include "sanguino/pins_SANGUINOLOLU_12.h"    // ATmega644P, ATmega1284P                env:sanguino_atmega644p env:sanguino_atmega1284p
+  #include "sanguino/pins_SANGUINOLOLU_12.h"    // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
 #elif MB(MELZI)
-  #include "sanguino/pins_MELZI.h"              // ATmega644P, ATmega1284P                env:sanguino_atmega644p env:sanguino_atmega1284p
+  #include "sanguino/pins_MELZI.h"              // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
 #elif MB(MELZI_MAKR3D)
-  #include "sanguino/pins_MELZI_MAKR3D.h"       // ATmega644P, ATmega1284P                env:sanguino_atmega644p env:sanguino_atmega1284p
+  #include "sanguino/pins_MELZI_MAKR3D.h"       // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
 #elif MB(MELZI_CREALITY)
-  #include "sanguino/pins_MELZI_CREALITY.h"     // ATmega644P, ATmega1284P                env:sanguino_atmega644p env:sanguino_atmega1284p
+  #include "sanguino/pins_MELZI_CREALITY.h"     // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
 #elif MB(MELZI_MALYAN)
-  #include "sanguino/pins_MELZI_MALYAN.h"       // ATmega644P, ATmega1284P                env:sanguino_atmega644p env:sanguino_atmega1284p
+  #include "sanguino/pins_MELZI_MALYAN.h"       // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
 #elif MB(MELZI_TRONXY)
-  #include "sanguino/pins_MELZI_TRONXY.h"       // ATmega644P, ATmega1284P                env:sanguino_atmega644p env:sanguino_atmega1284p
+  #include "sanguino/pins_MELZI_TRONXY.h"       // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
 #elif MB(STB_11)
-  #include "sanguino/pins_STB_11.h"             // ATmega644P, ATmega1284P                env:sanguino_atmega644p env:sanguino_atmega1284p
+  #include "sanguino/pins_STB_11.h"             // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
 #elif MB(AZTEEG_X1)
-  #include "sanguino/pins_AZTEEG_X1.h"          // ATmega644P, ATmega1284P                env:sanguino_atmega644p env:sanguino_atmega1284p
+  #include "sanguino/pins_AZTEEG_X1.h"          // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
 
 //
 // Other ATmega644P, ATmega644, ATmega1284P
 //
 
 #elif MB(GEN3_MONOLITHIC)
-  #include "sanguino/pins_GEN3_MONOLITHIC.h"    // ATmega644P                             env:sanguino_atmega644p
+  #include "sanguino/pins_GEN3_MONOLITHIC.h"    // ATmega644P                             env:sanguino644p
 #elif MB(GEN3_PLUS)
-  #include "sanguino/pins_GEN3_PLUS.h"          // ATmega644P, ATmega1284P                env:sanguino_atmega644p env:sanguino_atmega1284p
+  #include "sanguino/pins_GEN3_PLUS.h"          // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
 #elif MB(GEN6)
-  #include "sanguino/pins_GEN6.h"               // ATmega644P, ATmega1284P                env:sanguino_atmega644p env:sanguino_atmega1284p
+  #include "sanguino/pins_GEN6.h"               // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
 #elif MB(GEN6_DELUXE)
-  #include "sanguino/pins_GEN6_DELUXE.h"        // ATmega644P, ATmega1284P                env:sanguino_atmega644p env:sanguino_atmega1284p
+  #include "sanguino/pins_GEN6_DELUXE.h"        // ATmega644P, ATmega1284P                env:sanguino644p env:sanguino1284p
 #elif MB(GEN7_CUSTOM)
-  #include "sanguino/pins_GEN7_CUSTOM.h"        // ATmega644P, ATmega644, ATmega1284P     env:sanguino_atmega644p env:sanguino_atmega1284p
+  #include "sanguino/pins_GEN7_CUSTOM.h"        // ATmega644P, ATmega644, ATmega1284P     env:sanguino644p env:sanguino1284p
 #elif MB(GEN7_12)
-  #include "sanguino/pins_GEN7_12.h"            // ATmega644P, ATmega644, ATmega1284P     env:sanguino_atmega644p env:sanguino_atmega1284p
+  #include "sanguino/pins_GEN7_12.h"            // ATmega644P, ATmega644, ATmega1284P     env:sanguino644p env:sanguino1284p
 #elif MB(GEN7_13)
-  #include "sanguino/pins_GEN7_13.h"            // ATmega644P, ATmega644, ATmega1284P     env:sanguino_atmega644p env:sanguino_atmega1284p
+  #include "sanguino/pins_GEN7_13.h"            // ATmega644P, ATmega644, ATmega1284P     env:sanguino644p env:sanguino1284p
 #elif MB(GEN7_14)
-  #include "sanguino/pins_GEN7_14.h"            // ATmega644P, ATmega644, ATmega1284P     env:sanguino_atmega644p env:sanguino_atmega1284p
+  #include "sanguino/pins_GEN7_14.h"            // ATmega644P, ATmega644, ATmega1284P     env:sanguino644p env:sanguino1284p
 #elif MB(OMCA_A)
-  #include "sanguino/pins_OMCA_A.h"             // ATmega644                              env:sanguino_atmega644p
+  #include "sanguino/pins_OMCA_A.h"             // ATmega644                              env:sanguino644p
 #elif MB(OMCA)
-  #include "sanguino/pins_OMCA.h"               // ATmega644P, ATmega644                  env:sanguino_atmega644p
+  #include "sanguino/pins_OMCA.h"               // ATmega644P, ATmega644                  env:sanguino644p
 #elif MB(ANET_10)
-  #include "sanguino/pins_ANET_10.h"            // ATmega1284P                            env:sanguino_atmega1284p
+  #include "sanguino/pins_ANET_10.h"            // ATmega1284P                            env:sanguino1284p
 #elif MB(SETHI)
-  #include "sanguino/pins_SETHI.h"              // ATmega644P, ATmega644, ATmega1284P     env:sanguino_atmega644p env:sanguino_atmega1284p
+  #include "sanguino/pins_SETHI.h"              // ATmega644P, ATmega644, ATmega1284P     env:sanguino644p env:sanguino1284p
 
 //
 // Teensyduino - AT90USB1286, AT90USB1286P
 #elif MB(MKS_ROBIN_LITE)
   #include "stm32/pins_MKS_ROBIN_LITE.h"        // STM32F1                                env:mks_robin_lite
 #elif MB(BTT_SKR_MINI_V1_1)
-  #include "stm32/pins_BTT_SKR_MINI_V1_1.h"     // STM32F1                                env:STM32F103RC_bigtree env:STM32F103RC_bigtree_512K env:STM32F103RC_bigtree_USB env:STM32F103RC_bigtree_512K_USB
+  #include "stm32/pins_BTT_SKR_MINI_V1_1.h"     // STM32F1                                env:STM32F103RC_btt env:STM32F103RC_btt_512K env:STM32F103RC_btt_USB env:STM32F103RC_btt_512K_USB
 #elif MB(BTT_SKR_MINI_E3_V1_0)
-  #include "stm32/pins_BTT_SKR_MINI_E3_V1_0.h"  // STM32F1                                env:STM32F103RC_bigtree env:STM32F103RC_bigtree_512K env:STM32F103RC_bigtree_USB env:STM32F103RC_bigtree_512K_USB
+  #include "stm32/pins_BTT_SKR_MINI_E3_V1_0.h"  // STM32F1                                env:STM32F103RC_btt env:STM32F103RC_btt_512K env:STM32F103RC_btt_USB env:STM32F103RC_btt_512K_USB
 #elif MB(BTT_SKR_MINI_E3_V1_2)
-  #include "stm32/pins_BTT_SKR_MINI_E3_V1_2.h"  // STM32F1                                env:STM32F103RC_bigtree env:STM32F103RC_bigtree_512K env:STM32F103RC_bigtree_USB env:STM32F103RC_bigtree_512K_USB
+  #include "stm32/pins_BTT_SKR_MINI_E3_V1_2.h"  // STM32F1                                env:STM32F103RC_btt env:STM32F103RC_btt_512K env:STM32F103RC_btt_USB env:STM32F103RC_btt_512K_USB
 #elif MB(BTT_SKR_E3_DIP)
-  #include "stm32/pins_BTT_SKR_E3_DIP.h"        // STM32F1                                env:STM32F103RE_bigtree env:STM32F103RE_bigtree_USB env:STM32F103RC_bigtree env:STM32F103RC_bigtree_512K env:STM32F103RC_bigtree_USB env:STM32F103RC_bigtree_512K_USB
+  #include "stm32/pins_BTT_SKR_E3_DIP.h"        // STM32F1                                env:STM32F103RE_btt env:STM32F103RE_btt_USB env:STM32F103RC_btt env:STM32F103RC_btt_512K env:STM32F103RC_btt_USB env:STM32F103RC_btt_512K_USB
 #elif MB(JGAURORA_A5S_A1)
   #include "stm32/pins_JGAURORA_A5S_A1.h"       // STM32F1                                env:jgaurora_a5s_a1
 #elif MB(FYSETC_AIO_II)

Marlin/src/pins/rambo/pins_MINIRAMBO.h

  */
 
 #ifndef __AVR_ATmega2560__
-  #error "Oops! Select 'RAMBo' in 'Tools > Board.'"
+  #error "Oops! Select 'RAMBo' in 'Tools > Board' or the Mega2560 environment in PlatformIO."
 #endif
 
 #if MB(MINIRAMBO_10A)

buildroot/share/git/mftest

     lin*) TESTENV='linux_native' ;;
  lpc?(8)) TESTENV='LPC1768' ;;
     lpc9) TESTENV='LPC1769' ;;
-    m128) TESTENV='megaatmega1280' ;;
-    m256) TESTENV='megaatmega2560' ;;
-    mega) TESTENV='megaatmega2560' ;;
+    m128) TESTENV='mega1280' ;;
+    m256) TESTENV='mega2560' ;;
+    mega) TESTENV='mega2560' ;;
      stm) TESTENV='STM32F103RE' ;;
       f1) TESTENV='STM32F103RE' ;;
       f4) TESTENV='STM32F4' ;;

buildroot/share/tests/mega1280-tests

+#!/usr/bin/env bash
+#
+# Build tests for AVR ATmega1280
+#
+
+# exit on first failure
+set -e
+
+#
+# Build with the default configurations
+#
+#restore_configs
+#exec_test $1 $2 "Default Configuration"
+
+#
+# Test MESH_BED_LEVELING feature, with LCD
+#
+restore_configs
+opt_set LCD_LANGUAGE an
+opt_enable SPINDLE_FEATURE ULTIMAKERCONTROLLER LCD_BED_LEVELING \
+           MESH_BED_LEVELING ENABLE_LEVELING_FADE_HEIGHT MESH_G28_REST_ORIGIN \
+           G26_MESH_VALIDATION MESH_EDIT_MENU GCODE_QUOTED_STRINGS
+exec_test $1 $2 "Spindle, MESH_BED_LEVELING, and LCD"
+
+#
+# Test DUAL_X_CARRIAGE
+#
+restore_configs
+opt_set MOTHERBOARD BOARD_TT_OSCAR
+opt_set LCD_LANGUAGE pt
+opt_set EXTRUDERS 2
+opt_set TEMP_SENSOR_1 1
+opt_enable USE_XMAX_PLUG DUAL_X_CARRIAGE REPRAPWORLD_KEYPAD
+opt_set REPRAPWORLD_KEYPAD_MOVE_STEP 10.0
+exec_test $1 $2 "TT Oscar | DUAL_X_CARRIAGE"
+
+#
+# Delta Config (generic) + Probeless
+#
+use_example_configs delta/generic
+opt_enable REPRAP_DISCOUNT_SMART_CONTROLLER DELTA_AUTO_CALIBRATION DELTA_CALIBRATION_MENU
+exec_test $1 $2 "RAMPS | DELTA | RRD LCD | DELTA_AUTO_CALIBRATION | DELTA_CALIBRATION_MENU"
+
+#
+# Delta Config (generic) + ABL bilinear + BLTOUCH
+use_example_configs delta/generic
+opt_set LCD_LANGUAGE cz
+opt_set X_DRIVER_TYPE L6470
+opt_set Y_DRIVER_TYPE L6470
+opt_set Z_DRIVER_TYPE L6470
+opt_add L6470_CHAIN_SCK_PIN  53
+opt_add L6470_CHAIN_MISO_PIN 49
+opt_add L6470_CHAIN_MOSI_PIN 40
+opt_add L6470_CHAIN_SS_PIN   42
+opt_add "ENABLE_RESET_L64XX_CHIPS(V) NOOP"
+opt_enable REPRAP_DISCOUNT_SMART_CONTROLLER DELTA_CALIBRATION_MENU AUTO_BED_LEVELING_BILINEAR BLTOUCH
+exec_test $1 $2 "DELTA | L6470 | RRD LCD | ABL Bilinear | BLTOUCH"
+
+# clean up
+restore_configs

buildroot/share/tests/megaatmega2560-tests → buildroot/share/tests/mega2560-tests

 exec_test $1 $2 "Azteeg X3 | Mixing Extruder (x5) | Gradient Mix | Cyrillic"
 
 #
-# Test DUAL_X_CARRIAGE
-#
-restore_configs
-opt_set MOTHERBOARD BOARD_TT_OSCAR
-opt_set LCD_LANGUAGE pt
-opt_set EXTRUDERS 2
-opt_set TEMP_SENSOR_1 1
-opt_enable USE_XMAX_PLUG DUAL_X_CARRIAGE
-opt_enable REPRAPWORLD_KEYPAD
-opt_set REPRAPWORLD_KEYPAD_MOVE_STEP 10.0
-exec_test $1 $2 "TT Oscar | DUAL_X_CARRIAGE"
-
-#
 # Test SPEAKER with BOARD_BQ_ZUM_MEGA_3D and BQ_LCD_SMART_CONTROLLER
 #
 #restore_configs
 #exec_test $1 $2 "Stuff"
 
 #
-# Delta Config (generic) + ABL bilinear + BLTOUCH
-use_example_configs delta/generic
-opt_set LCD_LANGUAGE cz
-opt_set X_DRIVER_TYPE L6470
-opt_set Y_DRIVER_TYPE L6470
-opt_set Z_DRIVER_TYPE L6470
-opt_add L6470_CHAIN_SCK_PIN  53
-opt_add L6470_CHAIN_MISO_PIN 49
-opt_add L6470_CHAIN_MOSI_PIN 40
-opt_add L6470_CHAIN_SS_PIN   42
-opt_add "ENABLE_RESET_L64XX_CHIPS(V) NOOP"
-opt_enable REPRAP_DISCOUNT_SMART_CONTROLLER DELTA_CALIBRATION_MENU AUTO_BED_LEVELING_BILINEAR BLTOUCH
-exec_test $1 $2 "DELTA | L6470 | RRD LCD | ABL Bilinear | BLTOUCH"
-
-#
 # Delta Config (generic) + UBL + ALLEN_KEY + OLED_PANEL_TINYBOY2 + EEPROM_SETTINGS
 #
 use_example_configs delta/generic
 exec_test $1 $2 "RAMPS | DELTA | OLED_PANEL_TINYBOY2 | UBL | Allen Key | EEPROM"
 
 #
-# Delta Config (generic) + Probeless
-#
-use_example_configs delta/generic
-opt_enable REPRAP_DISCOUNT_SMART_CONTROLLER DELTA_AUTO_CALIBRATION DELTA_CALIBRATION_MENU
-exec_test $1 $2 "RAMPS | DELTA | RRD LCD | DELTA_AUTO_CALIBRATION | DELTA_CALIBRATION_MENU"
-
-#
 # Delta Config (FLSUN AC because it's complex)
 #
 use_example_configs delta/FLSUN/auto_calibrate

buildroot/share/tests/megaatmega1280-tests

-#!/usr/bin/env bash
-#
-# Build tests for AVR ATmega1280
-#
-
-# exit on first failure
-set -e
-
-#
-# Build with the default configurations
-#
-#restore_configs
-#exec_test $1 $2 "Default Configuration"
-
-#
-# Test MESH_BED_LEVELING feature, with LCD
-#
-restore_configs
-opt_set LCD_LANGUAGE an
-opt_enable SPINDLE_FEATURE ULTIMAKERCONTROLLER LCD_BED_LEVELING \
-           MESH_BED_LEVELING ENABLE_LEVELING_FADE_HEIGHT MESH_G28_REST_ORIGIN \
-           G26_MESH_VALIDATION MESH_EDIT_MENU GCODE_QUOTED_STRINGS
-exec_test $1 $2 "Spindle, MESH_BED_LEVELING, and LCD"
-
-
-# clean up
-restore_configs

buildroot/share/vscode/auto_build.py

           target_env = 'DUE_USB'
         else:
           target_env = 'DUE'
-    elif env_A == 'STM32F103RC_bigtree' or env_A == 'STM32F103RE_bigtree':
-      if env_A == 'STM32F103RE_bigtree':
+    elif env_A == 'STM32F103RC_btt' or env_A == 'STM32F103RE_btt':
+      if env_A == 'STM32F103RE_btt':
         get_answer(board_name, 'MCU Type?', 'STM32F103RC', 'STM32F103RE')
         if 1 == get_answer_val:
-          env_A = 'STM32F103RC_bigtree'
+          env_A = 'STM32F103RC_btt'
       target_env = env_A
-      if env_A == 'STM32F103RC_bigtree':
+      if env_A == 'STM32F103RC_btt':
         get_answer(board_name, 'RCT6 Flash Size?', '512K', '256K')
         if 1 == get_answer_val:
           target_env += '_512K'

platformio.ini

 [platformio]
 src_dir      = Marlin
 boards_dir   = buildroot/share/PlatformIO/boards
-default_envs = megaatmega2560
+default_envs = mega2560
 
 [common]
 default_src_filter = +<src/*> -<src/config> -<src/HAL> +<src/HAL/shared>
 #
 # ATmega2560
 #
-[env:megaatmega2560]
+[env:mega2560]
 platform          = atmelavr
 board             = megaatmega2560
 board_build.f_cpu = 16000000L
 #
 # ATmega1280
 #
-[env:megaatmega1280]
+[env:mega1280]
 platform          = atmelavr
 board             = megaatmega1280
 board_build.f_cpu = 16000000L
 #
 # Sanguinololu (ATmega644p)
 #
-[env:sanguino_atmega644p]
+[env:sanguino644p]
 platform      = atmelavr
 board         = sanguino_atmega644p
 lib_deps      = ${common.lib_deps}
 #
 # Sanguinololu (ATmega1284p)
 #
-[env:sanguino_atmega1284p]
+[env:sanguino1284p]
 platform      = atmelavr
 board         = sanguino_atmega1284p
 lib_deps      = ${common.lib_deps}
 #
 # BigTree SKR Mini V1.1 / SKR mini E3 / SKR E3 DIP (STM32F103RCT6 ARM Cortex-M3)
 #
-#   STM32F103RC_bigtree ............. RCT6 with 256K
-#   STM32F103RC_bigtree_USB ......... RCT6 with 256K (USB mass storage)
-#   STM32F103RC_bigtree_512K ........ RCT6 with 512K
-#   STM32F103RC_bigtree_512K_USB .... RCT6 with 512K (USB mass storage)
+#   STM32F103RC_btt ............. RCT6 with 256K
+#   STM32F103RC_btt_USB ......... RCT6 with 256K (USB mass storage)
+#   STM32F103RC_btt_512K ........ RCT6 with 512K
+#   STM32F103RC_btt_512K_USB .... RCT6 with 512K (USB mass storage)
 #
 
-[env:STM32F103RC_bigtree]
+[env:STM32F103RC_btt]
 platform          = ststm32
 board             = genericSTM32F103RC
 platform_packages = tool-stm32duino
 lib_ignore        = Adafruit NeoPixel, SPI
 monitor_speed     = 115200
 
-[env:STM32F103RC_bigtree_USB]
+[env:STM32F103RC_btt_USB]
 platform          = ststm32
 board             = genericSTM32F103RC
 platform_packages = tool-stm32duino
 lib_ignore        = Adafruit NeoPixel, SPI
 monitor_speed     = 115200
 
-[env:STM32F103RC_bigtree_512K]
+[env:STM32F103RC_btt_512K]
 platform          = ststm32
 board             = genericSTM32F103RC
 board_upload.maximum_size=524288
 lib_ignore        = Adafruit NeoPixel, SPI
 monitor_speed     = 115200
 
-[env:STM32F103RC_bigtree_512K_USB]
+[env:STM32F103RC_btt_512K_USB]
 platform          = ststm32
 board             = genericSTM32F103RC
 board_upload.maximum_size=524288
 monitor_speed     = 115200
 
 #
-#   STM32F103RE_bigtree ............. RET6
-#   STM32F103RE_bigtree_USB ......... RET6 (USB mass storage)
+#   STM32F103RE_btt ............. RET6
+#   STM32F103RE_btt_USB ......... RET6 (USB mass storage)
 #
-[env:STM32F103RE_bigtree]
+[env:STM32F103RE_btt]
 platform          = ststm32
 board             = genericSTM32F103RE
 platform_packages = tool-stm32duino
 upload_protocol   = stlink
 monitor_speed     = 115200
 
-[env:STM32F103RE_bigtree_USB]
+[env:STM32F103RE_btt_USB]
 platform          = ststm32
 board             = genericSTM32F103RE
 platform_packages = tool-stm32duino