diff options
Diffstat (limited to 'src/drivers')
-rw-r--r-- | src/drivers/St7789.cpp | 10 | ||||
-rw-r--r-- | src/drivers/St7789.h | 4 |
2 files changed, 8 insertions, 6 deletions
diff --git a/src/drivers/St7789.cpp b/src/drivers/St7789.cpp index d520199e..3ed1beb4 100644 --- a/src/drivers/St7789.cpp +++ b/src/drivers/St7789.cpp @@ -23,7 +23,7 @@ void St7789::Init() { RowAddressSet(); DisplayInversionOn(); NormalModeOn(); - SetGamma(); + SetVdv(); DisplayOn(); } @@ -115,9 +115,11 @@ void St7789::WriteToRam() { WriteCommand(static_cast<uint8_t>(Commands::WriteToRam)); } -void St7789::SetGamma() { - WriteCommand(static_cast<uint8_t>(Commands::GammaSet)); - WriteData(0x04); +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::DisplayOff() { diff --git a/src/drivers/St7789.h b/src/drivers/St7789.h index 1317abe2..a2f10447 100644 --- a/src/drivers/St7789.h +++ b/src/drivers/St7789.h @@ -43,7 +43,7 @@ namespace Pinetime { void NormalModeOn(); void WriteToRam(); void SetAddrWindow(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1); - void SetGamma(); + void SetVdv(); void WriteCommand(uint8_t cmd); void WriteSpi(const uint8_t* data, size_t size); @@ -53,7 +53,6 @@ namespace Pinetime { SleepOut = 0x11, NormalModeOn = 0x13, DisplayInversionOn = 0x21, - GammaSet = 0x26, DisplayOff = 0x28, DisplayOn = 0x29, ColumnAddressSet = 0x2a, @@ -63,6 +62,7 @@ namespace Pinetime { VerticalScrollDefinition = 0x33, VerticalScrollStartAddress = 0x37, ColMod = 0x3a, + VdvSet = 0xc4, }; void WriteData(uint8_t data); void ColumnAddressSet(); |