-- -- file : max520.jal -- author : Alessandro Zummo <firstname.lastname@example.org> -- date : 04.07.2000 -- purpose : MAX520/MAX521 ( 8 bits, 8 channels D/A converter) control routines -- requires : i2c -- pins : see i2cp -- -- Copyright (C) 2000 Alessandro Zummo -- -- This library is free software; you can redistribute it and/or -- modify it under the terms of the GNU Library General Public -- License as published by the Free Software Foundation; either -- version 2 of the License, or (at your option) any later version. -- -- This library is distributed in the hope that it will be useful, -- but WITHOUT ANY WARRANTY; without even the implied warranty of -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -- Library General Public License for more details. -- -- You should have received a copy of the GNU Library General Public -- License along with this library; if not, write to the -- Free Software Foundation, Inc., 59 Temple Place - Suite 330, -- Boston, MA 02111-1307, USA. -- -- This library has not (yet) been tested by the author. If it works -- for you, please drop me a note. -- include the required libraries include i2c -- Write <value> to <channel> of the MAX520/MAX521 located at <address> -- -- Please check the datasheet for further explanations. procedure max520_write( byte in address, byte in channel, byte in value ) is var byte control = value & 0b_0000_0111 i2c_write_2( address, control, value ) end procedure -- power down procedure max520_powerdown( byte in address ) is i2c_write_1( address, 0b_0000_1000 ) end procedure -- reset procedure max520_reset( byte in address ) is i2c_write_1( address, 0b_0001_0000 ) end procedure
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