From 7f0db02066a7554b959fa264fcc200b2a2e4c929 Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Sun, 1 Jan 2023 18:03:19 +0100
Subject: Add driver for ADS111x 16-Bit ADC

---
 include/driver/ads111x.h | 88 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 include/driver/ads111x.h

(limited to 'include/driver/ads111x.h')

diff --git a/include/driver/ads111x.h b/include/driver/ads111x.h
new file mode 100644
index 0000000..f25dcde
--- /dev/null
+++ b/include/driver/ads111x.h
@@ -0,0 +1,88 @@
+/*
+ * Copyright 2023 Daniel Friesel
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Driver for ADS111x 16-Bit ADCs
+ */
+#ifndef ADS111x_H
+#define ADS111x_H
+
+class ADS111x {
+	private:
+		ADS111x(const ADS111x &copy);
+		unsigned char const address;
+		unsigned char fsr_scale;
+
+		unsigned char txbuf[3];
+		unsigned char rxbuf[2];
+
+		unsigned char const P_CONVERSION = 0;
+		unsigned char const P_CONFIG = 1;
+		unsigned char const P_LO_THRESH = 2;
+		unsigned char const P_HI_THRESH = 3;
+
+	public:
+		ADS111x(unsigned char const addr) : address(addr), fsr_scale(8) {}
+
+		unsigned short const START_CONVERSION = 1 << 15;
+		enum conf_mux : unsigned short {
+			DIFFERENTIAL_01 = 0 << 12,
+			DIFFERENTIAL_03 = 1 << 12,
+			DIFFERENTIAL_13 = 2 << 12,
+			DIFFERENTIAL_23 = 3 << 12,
+			SINGLE_0 = 4 << 12,
+			SINGLE_1 = 5 << 12,
+			SINGLE_2 = 6 << 12,
+			SINGLE_3 = 7 << 12
+		};
+		unsigned short const CONF_PGA_MASK = 0b0000111000000000;
+		unsigned short const CONF_PGA_OFFSET = 9;
+		enum conf_pga : unsigned short {
+			FSR_6V = 0 << 9,
+			FSR_4V = 1 << 9,
+			FSR_2V = 2 << 9,
+			FSR_1V = 3 << 9,
+			FSR_0V5 = 4 << 9,
+			FSR_0V25 = 5 << 9
+		};
+		enum conf_mode : unsigned short {
+			CONTINUOUS = 0 << 8,
+			SINGLE_SHORT = 1 << 8,
+		};
+		enum conf_data_rate : unsigned short {
+			SPS_8 = 0 << 5,
+			SPS_16 = 1 << 5,
+			SPS_32 = 2 << 5,
+			SPS_64 = 3 << 5,
+			SPS_128 = 4 << 5,
+			SPS_250 = 5 << 5,
+			SPS_475 = 6 << 5,
+			SPS_860 = 7 << 5
+		};
+		enum conf_comp_mode : unsigned short {
+			TRADITIONAL = 0 << 4,
+			WINDOW = 1 << 4
+		};
+		enum conf_comp_pol : unsigned short {
+			ACTIVE_LOW = 0 << 3,
+			ACTIVE_HIGH = 1 << 3,
+		};
+		enum conf_comp_lat : unsigned short {
+			NONLATCHING = 0 << 2,
+			LATCHING = 1 << 2
+		};
+		enum conf_comp_queue : unsigned short {
+			ONE_CONVERSON = 0,
+			TWO_CONVERSIONS,
+			FOUR_CONVERSIONS,
+			DISABLED
+		};
+
+		void configure(unsigned short config);
+		float readVoltage();
+};
+
+extern ADS111x ads111x;
+
+#endif
-- 
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