From f4b31b88508892ca781ebb14716dc322e868b6db Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Wed, 8 Aug 2018 15:45:32 +0200
Subject: Add 24LC64 EEPROM driver

---
 Makefile                      |  5 +++++
 include/driver/eeprom24lc64.h | 19 +++++++++++++++++++
 src/app/i2cdetect/main.cc     | 13 +++++++++++++
 src/driver/eeprom24lc64.cc    | 26 ++++++++++++++++++++++++++
 src/driver/soft_i2c.cc        |  2 ++
 5 files changed, 65 insertions(+)
 create mode 100644 include/driver/eeprom24lc64.h
 create mode 100644 src/driver/eeprom24lc64.cc

diff --git a/Makefile b/Makefile
index 4e74e6a..5d8b2ad 100644
--- a/Makefile
+++ b/Makefile
@@ -19,6 +19,11 @@ ifneq ($(findstring am2320,${drivers}), )
 	COMMON_FLAGS += -DDRIVER_AM2320
 endif
 
+ifneq ($(findstring eeprom24lc64,${drivers}), )
+	TARGETS += src/driver/eeprom24lc64.cc
+	COMMON_FLAGS += -DDRIVER_EEPROM24LC64
+endif
+
 ifneq ($(findstring max44006,${drivers}), )
 	TARGETS += src/driver/max44006.cc
 	COMMON_FLAGS += -DDRIVER_MAX44006
diff --git a/include/driver/eeprom24lc64.h b/include/driver/eeprom24lc64.h
new file mode 100644
index 0000000..66e7666
--- /dev/null
+++ b/include/driver/eeprom24lc64.h
@@ -0,0 +1,19 @@
+#ifndef EEPROM24LC64_H
+#define EEPROM24LC64_H
+
+class EEPROM24LC64 {
+	private:
+		EEPROM24LC64(const EEPROM24LC64 &copy);
+		unsigned char const address;
+		unsigned char txbuf[34];
+
+	public:
+		EEPROM24LC64(unsigned char const addr) : address(addr) {}
+
+		void writePage(unsigned short addr, char *buf);
+		void readPage(unsigned short addr, char *buf);
+};
+
+extern EEPROM24LC64 eeprom24lc64;
+
+#endif
diff --git a/src/app/i2cdetect/main.cc b/src/app/i2cdetect/main.cc
index 5094fd5..4ec49d9 100644
--- a/src/app/i2cdetect/main.cc
+++ b/src/app/i2cdetect/main.cc
@@ -12,6 +12,9 @@
 #ifdef DRIVER_AM2320
 #include "driver/am2320.h"
 #endif
+#ifdef DRIVER_EEPROM24LC64
+#include "driver/eeprom24lc64.h"
+#endif
 #ifdef DRIVER_MAX44009
 #include "driver/max44009.h"
 #endif
@@ -40,6 +43,16 @@ void loop(void)
 	kout.printf_float(max44009.getLux());
 	kout << endl;
 #endif
+#ifdef DRIVER_EEPROM24LC64
+	char buf[33];
+	static unsigned char page = 0;
+	eeprom24lc64.writePage(page, "Hello, World! Und so weiter, lol");
+	arch.delay_ms(10);
+	eeprom24lc64.readPage(page, buf);
+	buf[32] = '\0';
+	kout << "Address " << page << ": " << buf << endl;
+	page++;
+#endif
 #ifdef DRIVER_MMSIMPLE
 	moody.toggleBlue();
 #endif
diff --git a/src/driver/eeprom24lc64.cc b/src/driver/eeprom24lc64.cc
new file mode 100644
index 0000000..745514b
--- /dev/null
+++ b/src/driver/eeprom24lc64.cc
@@ -0,0 +1,26 @@
+#include <stdlib.h>
+#include "driver/eeprom24lc64.h"
+#if defined(MULTIPASS_ARCH_HAS_I2C) && !defined(DRIVER_SOFTI2C)
+#include "driver/i2c.h"
+#else
+#include "driver/soft_i2c.h"
+#endif
+
+void EEPROM24LC64::readPage(unsigned short addr, char *data)
+{
+	txbuf[0] = addr >> 8;
+	txbuf[1] = addr & 0x00ff;
+	i2c.xmit(address, 2, txbuf, 32, (unsigned char *)data);
+}
+
+void EEPROM24LC64::writePage(unsigned short addr, char *data)
+{
+	txbuf[0] = addr >> 8;
+	txbuf[1] = addr & 0x00ff;
+	for (unsigned char i = 0; i < 32; i++) {
+		txbuf[i+2] = data[i];
+	}
+	i2c.xmit(address, 34, txbuf, 0, NULL);
+}
+
+EEPROM24LC64 eeprom24lc64(0x50);
diff --git a/src/driver/soft_i2c.cc b/src/driver/soft_i2c.cc
index cebd8be..33f77ab 100644
--- a/src/driver/soft_i2c.cc
+++ b/src/driver/soft_i2c.cc
@@ -140,6 +140,8 @@ signed char SoftI2C::xmit(unsigned char address,
 SoftI2C i2c(GPIO::d7, GPIO::d8);
 #elif MULTIPASS_ARCH_arduino_nano
 SoftI2C i2c(GPIO::pc4, GPIO::pc5);
+#elif MULTIPASS_ARCH_blinkenrocket
+SoftI2C i2c(GPIO::pc4, GPIO::pc5);
 #elif MULTIPASS_ARCH_msp430fr5969lp
 SoftI2C i2c(GPIO::p1_6, GPIO::p1_7);
 #endif
-- 
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