Add MCP23017 I2C driver (#430)

* Add mcp23017 driver * extract I2C transport from the common MCP23x17 logic * rename file and move chip init into Mcp23X17 * Add changelog entry * expand changelog entry
electro-smith · Dec 15, 2021 · f99ff47 · f99ff47
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -7,6 +7,7 @@
 * driver: added support for the 0 .. 2.5V ADC range to MAX11300 getter functions `const`, splitting the `enum VoltageRange` into two enums for the ADC and DAC configurations.
 
 ### Features
+* driver: added support for the MCP23x17 I/O Expander with I2C transport implementation
 
 ### Bug Fixes
 

diff --git a/src/daisy.h b/src/daisy.h
@@ -47,6 +47,7 @@
 #include "dev/codec_pcm3060.h"
 #include "dev/codec_wm8731.h"
 #include "dev/lcd_hd44780.h"
+#include "dev/mcp23x17.h"
 #include "dev/max11300.h"
 #include "ui/ButtonMonitor.h"
 #include "ui/PotMonitor.h"