ADS1256 SPI analog addon

CMakeLists.txt

@@ -200,6 +200,7 @@ src/addons/snes_input.cpp
 src/addons/inputhistory.cpp
 src/addons/tilt.cpp
 src/addons/xbonepassthrough.cpp
+src/addons/spi_analog_ads1256.cpp
 ${PROTO_OUTPUT_DIR}/enums.pb.c
 ${PROTO_OUTPUT_DIR}/config.pb.c
 )
@@ -218,6 +219,7 @@ AnimationStation
 CRC32
 FlashPROM
 ADS1219
+ADS1256
 PlayerLEDs
 NeoPico
 OneBitDisplay

headers/addons/spi_analog_ads1256.h

@@ -0,0 +1,53 @@
+#ifndef SPI_ANALOG_ADS1256_H_
+#define SPI_ANALOG_ADS1256_H_
+
+#include <ADS1256.h>
+#include <algorithm>
+
+#include "gpaddon.h"
+
+#include "GamepadEnums.h"
+#include "peripheralmanager.h"
+
+#ifndef SPI_ANALOG1256_ENABLED
+#define SPI_ANALOG1256_ENABLED 0
+#endif
+
+#ifndef SPI_ANALOG1256_CS_PIN
+#define SPI_ANALOG1256_CS_PIN -1
+#endif
+
+#ifndef SPI_ANALOG1256_DRDY_PIN
+#define SPI_ANALOG1256_DRDY_PIN -1
+#endif
+
+#ifndef SPI_ANALOG1256_BLOCK
+#define SPI_ANALOG1256_BLOCK spi0
+#endif
+
+#ifndef SPI_ANALOG1256_SPEED
+#define SPI_ANALOG1256_SPEED 5000000
+#endif
+
+// Analog Module Name
+#define SPIAnalog1256Name "SPIAnalogADS1256"
+
+class SPIAnalog1256Input : public GPAddon {
+public:
+	virtual bool available();
+	virtual void setup();       // Analog Setup
+	virtual void preprocess() {}
+	virtual void process();     // Analog Process
+    virtual std::string name() { return SPIAnalog1256Name; }
+private:
+    uint8_t convert24to8bit(float voltage);
+    uint16_t convert24to16bit(float voltage);
+
+    ADS1256 * ads;
+    float values[ADS1256_CHANNEL_COUNT]; // Cache for latest read values
+    bool enableTriggers;
+    uint8_t readChannelCount; // Number of channels to read from the ADC
+    float analogMax = ADS1256_MAX_3V;
+};
+
+#endif  // SPI_ANALOG_ADS1256_H_