Add support for SSD1305 OLEDs via temporary hack

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Support for SSD1305 displays via a temporary hack (assume SSD1305 when `width` is set to 132). Further details in the wiki.
+
 ### Changed
 
 - Update to circle-stdlib v15.13/Circle Step 44.5.

sdcard/mt32-pi.cfg

@@ -373,7 +373,10 @@ type = none
 # Note that not all dimension settings are valid; see documentation for valid
 # configurations for each LCD driver.
 #
-# Values: 20-128 (128*)
+# If set to 132, assume this display is an SSD1305 (see wiki).
+# Note: the correct settings for the SSD1305 may change in future.
+#
+# Values: 20-132 (128*)
 width = 128
 
 # Set the height of the LCD.

src/lcd/drivers/ssd1306.cpp

@@ -165,12 +165,16 @@ bool CSSD1306::Initialize()
 {
 	assert(m_pI2CMaster != nullptr);
 
-	// Validate dimensions - only 128x32 and 128x64 supported for now
-	if (!(m_nHeight == 32 || m_nHeight == 64) || m_nWidth != 128)
+	// Validate dimensions - only 128x32, 128x64, and 132x{32, 64} (SSD1305) supported for now
+	if (!(m_nHeight == 32 || m_nHeight == 64) || !(m_nWidth == 128 || m_nWidth == 132))
 		return false;
 
+	// HACK: Assume SSD1305 if width is 132 (visible width is usually 128 on these modules)
+	// TODO: Some kind of abstraction between visible size and pixel memory size?
+	const bool bIsSSD1305 = m_nWidth == 132;
+
 	const u8 nMultiplexRatio  = m_nHeight - 1;
-	const u8 nCOMPins         = m_nHeight == 32 ? 0x02 : 0x12;
+	const u8 nCOMPins         = (m_nHeight == 32 && !bIsSSD1305) ? 0x02 : 0x12;
 	const u8 nColumnAddrRange = m_nWidth - 1;
 	const u8 nPageAddrRange   = m_nHeight / 8 - 1;
 	// https://www.buydisplay.com/download/ic/SSD1312_Datasheet.pdf Pg. 51 Section 2.1.19