add method to set Vsl int/ext reference

Author: avsa242

core.con.ssd1322.spin

@@ -4,8 +4,8 @@
     Description:    SSD1322-specific constants
     Author:         Jesse Burt
     Started:        Jul 17, 2023
-    Updated:        Aug 20, 2024
-    Copyright (c) 2024 - See end of file for terms of use.
+    Updated:        Feb 14, 2025
+    Copyright (c) 2025 - See end of file for terms of use.
 ----------------------------------------------------------------------------------------------------
 }
 
@@ -84,6 +84,16 @@ CON
         CLK_DIV_CLR     = CLK_DIV_BITS ^ CLKDIV_MASK
 
     DISP_ENH_A          = $b4
+    DISP_ENH_A_A_MASK   = $a3
+        VSL_BITS        = %11
+        VSL_MASK        = VSL_BITS ^ DISP_ENH_A_A_MASK
+        VSL_INTERNAL    = %10
+    DISP_ENH_A_B_MASK   = $fd
+        LOWGS           = 3
+        LOWGS_BITS      = %11111
+        LOWGS_MASK      = (LOWGS_BITS << LOWGS) ^ DISP_ENH_A_B_MASK
+        ENH_LOWGS       = %11111 << LOWGS
+        NORM_LOWGS      = %10110 << LOWGS
 
     SET_GPIO            = $b5
     SETGPIO_MASK        = $0F
@@ -112,7 +122,7 @@ PUB null()
 
 DAT
 {
-Copyright 2024 Jesse Burt
+Copyright 2025 Jesse Burt
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
 associated documentation files (the "Software"), to deal in the Software without restriction,

display.oled.ssd1322.spin

@@ -4,7 +4,7 @@
     Description:    Driver for SSD1322 OLED displays
     Author:         Jesse Burt
     Started:        Jul 17, 2023
-    Updated:        Feb 11, 2025
+    Updated:        Feb 14, 2025
     Copyright (c) 2025 - See end of file for terms of use.
 ----------------------------------------------------------------------------------------------------
 }
@@ -55,6 +55,7 @@ VAR
     byte _remap[2]                              ' set re-map and dual COM line mode
     byte _clkdiv                                ' clock divider and oscillator freq
     byte _gpio_state                            ' gpio 0, 1 state
+    byte _disp_enh_a[2]                         ' ext/int VSL, enhanced low GS disp quality
 
 
 PUB start(): s
@@ -322,6 +323,14 @@ PUB vdd_regulator(r)
     command(core.FUNC_SEL, (r <> 0) & 1, 1)
 
 
+PUB vsl_reference(r)
+' Set Vsl reference
+'   0:                  external
+'   non-zero values:    internal (default)
+    _disp_enh_a[0] := (_disp_enh_a & core.VSL_MASK) | ( (r <> 0) ? core.VSL_INTERNAL : $00 )
+    command(core.DISP_ENH_A, _disp_enh_a[0], 1)
+
+
 PRI command(c, v=0, l=0)
 ' Issue simple command, no parameters
     outa[_DC] := CMD

display.oled.ssd1322.spin2

@@ -4,7 +4,7 @@
     Description:    Driver for SSD1322 OLED displays
     Author:         Jesse Burt
     Started:        Jan 15, 2024
-    Updated:        Feb 11, 2025
+    Updated:        Feb 14, 2025
     Copyright (c) 2025 - See end of file for terms of use.
 ----------------------------------------------------------------------------------------------------
 }
@@ -55,6 +55,7 @@ VAR
     byte _remap[2]                              ' set re-map and dual COM line mode
     byte _clkdiv                                ' clock divider and oscillator freq
     byte _gpio_state                            ' gpio 0, 1 state
+    byte _disp_enh_a[2]                         ' ext/int VSL, enhanced low GS disp quality
 
 
 PUB start(): s
@@ -319,6 +320,14 @@ PUB vdd_regulator(r)
     command(core.FUNC_SEL, (r <> 0) & 1, 1)
 
 
+PUB vsl_reference(r)
+' Set Vsl reference
+'   0:                  external
+'   non-zero values:    internal (default)
+    _disp_enh_a[0] := (_disp_enh_a & core.VSL_MASK) | ( (r <> 0) ? core.VSL_INTERNAL : $00 )
+    command(core.DISP_ENH_A, _disp_enh_a[0], 1)
+
+
 PRI command(c, v=0, l=0)
 ' Issue simple command, no parameters
     pinw(_DC, CMD)