From 6af5bbcbc87eecccf7613785a3c9540c07d2fd3b Mon Sep 17 00:00:00 2001
From: JF <jf@codingfield.com>
Date: Sun, 19 Jul 2020 20:30:44 +0200
Subject: New implementation of the I²C/TWI driver. Fix reset timing and add
 dummy reading in Cst816S to fix init error on some devices.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/drivers/TwiMaster.h | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 src/drivers/TwiMaster.h

(limited to 'src/drivers/TwiMaster.h')

diff --git a/src/drivers/TwiMaster.h b/src/drivers/TwiMaster.h
new file mode 100644
index 00000000..3b7555f5
--- /dev/null
+++ b/src/drivers/TwiMaster.h
@@ -0,0 +1,38 @@
+#pragma once
+#include <FreeRTOS.h>
+#include <semphr.h>
+#include <drivers/include/nrfx_twi.h>
+
+
+namespace Pinetime {
+  namespace Drivers {
+    class TwiMaster {
+      public:
+        enum class Modules { TWIM1 };
+        enum class Frequencies {Khz100, Khz250, Khz400};
+        struct Parameters {
+          uint32_t frequency;
+          uint8_t pinSda;
+          uint8_t pinScl;
+        };
+
+        TwiMaster(const Modules module, const Parameters& params);
+
+        void Init();
+        void Read(uint8_t deviceAddress, uint8_t registerAddress, uint8_t* buffer, size_t size);
+        void Write(uint8_t deviceAddress, uint8_t registerAddress, const uint8_t* data, size_t size);
+
+      private:
+        void Read(uint8_t deviceAddress, uint8_t* buffer, size_t size, bool stop);
+        void Write(uint8_t deviceAddress, const uint8_t* data, size_t size, bool stop);
+        NRF_TWIM_Type* twiBaseAddress;
+        SemaphoreHandle_t mutex;
+        const Modules module;
+        const Parameters params;
+        static constexpr uint8_t maxDataSize{8};
+        static constexpr uint8_t registerSize{1};
+        uint8_t internalBuffer[maxDataSize + registerSize];
+
+    };
+  }
+}
\ No newline at end of file
-- 
cgit v1.2.3-70-g09d2