GoBot i2cDevice.WriteBlockData - ref: Gobot issue 372

gistfile1.txt

func (d *i2cDevice) WriteBlockData(reg uint8, data []byte) (err error) {
	if d.funcs&I2C_FUNC_SMBUS_WRITE_BLOCK_DATA == 0 {
		return fmt.Errorf("SMBus block data writing not supported")
	}
	if len(data) > 32 {
		return fmt.Errorf("SMBus block data write length od data slice to large (max: 32, passed: %d)", len(data))
	}
	buf := make([]byte, len(data)+1)
	n := copy(buf[1:], data) // <- fix
	if n != len(data) {
		return fmt.Errorf("SMBus block data write failed to all of the bytes from data (expected:%d, copied%d)", len(data), n)
	}
	fmt.Printf("Number of bytes copied: %d\n", n)
	buf[0] = uint8(len(data))
	fmt.Printf("len(data)=%d\n", len(data))
	fmt.Printf("data:%#v\n", data)
	fmt.Printf("len(buf)=%d\n", len(buf))
	fmt.Printf("buf:%#v\n", buf)
	err = d.smbusAccess(I2C_SMBUS_WRITE, reg, I2C_SMBUS_BLOCK_DATA, uintptr(unsafe.Pointer(&buf[0]))) // <- Broken?
	return err
}