first commit

dev/eep.cpp

@@ -0,0 +1,35 @@
+#include "i2c.h"
+
+#include "eep.h"
+
+static const unsigned char EEP_Addr = 0x50; // AT24C256
+
+static inline short Rev16(short v)
+{
+  asm("REV16 %1, %0" : "=r" (v) : "r" (v)); // v = v<<8 | v>>8;
+  return v;
+}
+//------------------------------------------------------------------------------
+
+void EEP_Init() // AT24C256
+{
+  I2C1_Init();
+}
+//------------------------------------------------------------------------------
+
+void EEP_Read(unsigned short Addr, void* Data, unsigned short Size)
+{
+  Addr=Rev16(Addr);
+  I2C1_Write(EEP_Addr, &Addr, 2);
+  I2C1_Read(EEP_Addr, Data, Size);
+  I2C1_Stop();
+}
+//------------------------------------------------------------------------------
+
+void EEP_Write(unsigned short Addr, const void* Data, unsigned short Size)
+{
+  Addr=Rev16(Addr);
+  I2C1_Write2(EEP_Addr, &Addr, 2, Data, Size);
+  I2C1_Stop();
+}
+//------------------------------------------------------------------------------