4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2010 Develer S.r.l. (http://www.develer.com/)
33 * \author Francesco Sacchi <batt@develer.com>
35 * Texas instrument TLV5618 DAC driver.
39 #include "hw/hw_tlv5618.h"
41 #include <kern/kfile.h>
43 #include <string.h> //memset
46 static void tlv5618_write(Tlv5618 *ctx, uint16_t val)
48 TLV5618_CSLOW(ctx->cs_pin);
49 kfile_putc(val >> 8, ctx->ch);
50 kfile_putc(val & 0xFF, ctx->ch);
52 TLV5618_CSHIGH(ctx->cs_pin);
55 #define POWERDOWN 0x2000
60 * Set DAC output A to \a val.
61 * \a val ranges from 0 to 4095 (12 bit).
62 * \note : if in power down, the device will be awaken.
64 void tlv5618_setOutA(Tlv5618 *ctx, uint16_t val)
67 tlv5618_write(ctx, val | OUTA);
71 * Set DAC output B to \a val.
72 * \a val ranges from 0 to 4095 (12 bit).
73 * \note : if in power down, the device will be awaken.
75 void tlv5618_setOutB(Tlv5618 *ctx, uint16_t val)
78 tlv5618_write(ctx, val | OUTB);
82 * Set the TLV5618 in the power down state.
84 void tlv5618_setPowerDown(Tlv5618 *ctx)
86 tlv5618_write(ctx, POWERDOWN);
91 * Init the TLV5618 with CS connected to \a cs_pin.
92 * \a ch should be the SPI channel needed to communicate with the DAC.
93 * This SPI should also be correctly configured (the MOSI should
94 * change on the rising edge of the SCK clock).
95 * \note the device is set in power down mode.
97 void tlv5618_init(Tlv5618 *ctx, KFile *ch, int cs_pin)
99 memset(ctx, 0, sizeof(*ctx));
100 ctx->cs_pin = cs_pin;
102 TLV5618_CSINIT(cs_pin);
103 tlv5618_setPowerDown(ctx);