simplify package structure

i2c.go

@@ -0,0 +1,51 @@
+package embd
+
+type I2CBus interface {
+	// ReadByte reads a byte from the given address.
+	ReadByte(addr byte) (value byte, err error)
+	// WriteByte writes a byte to the given address.
+	WriteByte(addr, value byte) error
+	// WriteBytes writes a slice bytes to the given address.
+	WriteBytes(addr byte, value []byte) error
+
+	// ReadFromReg reads n (len(value)) bytes from the given address and register.
+	ReadFromReg(addr, reg byte, value []byte) error
+	// ReadByteFromReg reads a byte from the given address and register.
+	ReadByteFromReg(addr, reg byte) (value byte, err error)
+	// ReadU16FromReg reads a unsigned 16 bit integer from the given address and register.
+	ReadWordFromReg(addr, reg byte) (value uint16, err error)
+
+	// WriteToReg writes len(value) bytes to the given address and register.
+	WriteToReg(addr, reg byte, value []byte) error
+	// WriteByteToReg writes a byte to the given address and register.
+	WriteByteToReg(addr, reg, value byte) error
+	// WriteU16ToReg
+	WriteWordToReg(addr, reg byte, value uint16) error
+}
+
+type I2C interface {
+	Bus(l byte) I2CBus
+
+	Close() error
+}
+
+var i2cInstance I2C
+
+func InitI2C() error {
+	desc, err := DescribeHost()
+	if err != nil {
+		return err
+	}
+
+	i2cInstance = desc.I2C()
+
+	return nil
+}
+
+func CloseI2C() error {
+	return i2cInstance.Close()
+}
+
+func NewI2CBus(l byte) I2CBus {
+	return i2cInstance.Bus(l)
+}