Revert "Fix large blacklevel step. Lower 25% of shades are now accessible."

This reverts commit 8061822f0cba9caa9d957b85a8284ab3120aaf3e.

2 files changed, 6 insertions, 8 deletions

diff --git a/src/drivers/St7789.cpp b/src/drivers/St7789.cpp
index 3ed1beb..d520199 100644
--- a/src/drivers/St7789.cpp
+++ b/src/drivers/St7789.cpp
@@ -23,7 +23,7 @@ void St7789::Init() {
   RowAddressSet();
   DisplayInversionOn();
   NormalModeOn();
-  SetVdv();
+  SetGamma();
   DisplayOn();
 }
 
@@ -115,11 +115,9 @@ void St7789::WriteToRam() {
   WriteCommand(static_cast<uint8_t>(Commands::WriteToRam));
 }
 
-void St7789::SetVdv() {
-  // By default there is a large step from pixel brightness zero to one.
-  // After experimenting with VCOMS, VRH and VDV, this was found to produce good results.
-  WriteCommand(static_cast<uint8_t>(Commands::VdvSet));
-  WriteData(0x10);
+void St7789::SetGamma() {
+  WriteCommand(static_cast<uint8_t>(Commands::GammaSet));
+  WriteData(0x04);
 }
 
 void St7789::DisplayOff() {
diff --git a/src/drivers/St7789.h b/src/drivers/St7789.h
index 8c2ac09..044fc81 100644
--- a/src/drivers/St7789.h
+++ b/src/drivers/St7789.h
@@ -43,7 +43,7 @@ namespace Pinetime {
       void DisplayOff();
 
       void SetAddrWindow(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1);
-      void SetVdv();
+      void SetGamma();
       void WriteCommand(uint8_t cmd);
       void WriteSpi(const uint8_t* data, size_t size);
 
@@ -53,6 +53,7 @@ namespace Pinetime {
         SleepOut = 0x11,
         NormalModeOn = 0x13,
         DisplayInversionOn = 0x21,
+        GammaSet = 0x26,
         DisplayOff = 0x28,
         DisplayOn = 0x29,
         ColumnAddressSet = 0x2a,
@@ -62,7 +63,6 @@ namespace Pinetime {
         VerticalScrollDefinition = 0x33,
         VerticalScrollStartAddress = 0x37,
         ColMod = 0x3a,
-        VdvSet = 0xc4,
       };
       void WriteData(uint8_t data);
       void ColumnAddressSet();